コード例 #1
0
    EXPORT_API bool nmcsBuildSet(nmgBuildContext* ctx
        , rcCompactHeightfield* chf
        , const float maxError
        , const int maxEdgeLen
        , rcContourSet* cset
        , const int flags)
    {
        if (!ctx || !chf || !cset)
            return false;

        return rcBuildContours(ctx
            , *chf
            , maxError
            , maxEdgeLen
            , *cset
            , flags);
    }
コード例 #2
0
bool Sample_Debug::handleBuild()
{

	if (m_chf)
	{
		rcFreeContourSet(m_cset);
		m_cset = 0;
		
		// Create contours.
		m_cset = rcAllocContourSet();
		if (!m_cset)
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'cset'.");
			return false;
		}
		if (!rcBuildContours(m_ctx, *m_chf, /*m_cfg.maxSimplificationError*/1.3f, /*m_cfg.maxEdgeLen*/12, *m_cset))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create contours.");
			return false;
		}
	}
		
	return true;
}
コード例 #3
0
bool Sample_SoloMesh::handleBuild()
{
	if (!m_geom || !m_geom->getMesh())
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Input mesh is not specified.");
		return false;
	}
	
	cleanup();
	
	const float* bmin = m_geom->getMeshBoundsMin();
	const float* bmax = m_geom->getMeshBoundsMax();
	const float* verts = m_geom->getMesh()->getVerts();
	const int nverts = m_geom->getMesh()->getVertCount();
	const int* tris = m_geom->getMesh()->getTris();
	const int ntris = m_geom->getMesh()->getTriCount();
	
	//
	// Step 1. Initialize build config.
	//
	
	// Init build configuration from GUI
	memset(&m_cfg, 0, sizeof(m_cfg));
	m_cfg.cs = m_cellSize;
	m_cfg.ch = m_cellHeight;
	m_cfg.walkableSlopeAngle = m_agentMaxSlope;
	m_cfg.walkableHeight = (int)ceilf(m_agentHeight / m_cfg.ch);
	m_cfg.walkableClimb = (int)floorf(m_agentMaxClimb / m_cfg.ch);
	m_cfg.walkableRadius = (int)ceilf(m_agentRadius / m_cfg.cs);
	m_cfg.maxEdgeLen = (int)(m_edgeMaxLen / m_cellSize);
	m_cfg.maxSimplificationError = m_edgeMaxError;
	m_cfg.minRegionArea = (int)rcSqr(m_regionMinSize);		// Note: area = size*size
	m_cfg.mergeRegionArea = (int)rcSqr(m_regionMergeSize);	// Note: area = size*size
	m_cfg.maxVertsPerPoly = (int)m_vertsPerPoly;
	m_cfg.detailSampleDist = m_detailSampleDist < 0.9f ? 0 : m_cellSize * m_detailSampleDist;
	m_cfg.detailSampleMaxError = m_cellHeight * m_detailSampleMaxError;
	
	// Set the area where the navigation will be build.
	// Here the bounds of the input mesh are used, but the
	// area could be specified by an user defined box, etc.
	rcVcopy(m_cfg.bmin, bmin);
	rcVcopy(m_cfg.bmax, bmax);
	rcCalcGridSize(m_cfg.bmin, m_cfg.bmax, m_cfg.cs, &m_cfg.width, &m_cfg.height);

	// Reset build times gathering.
	m_ctx->resetTimers();

	// Start the build process.	
	m_ctx->startTimer(RC_TIMER_TOTAL);
	
	m_ctx->log(RC_LOG_PROGRESS, "Building navigation:");
	m_ctx->log(RC_LOG_PROGRESS, " - %d x %d cells", m_cfg.width, m_cfg.height);
	m_ctx->log(RC_LOG_PROGRESS, " - %.1fK verts, %.1fK tris", nverts/1000.0f, ntris/1000.0f);
	
	//
	// Step 2. Rasterize input polygon soup.
	//
	
	// Allocate voxel heightfield where we rasterize our input data to.
	m_solid = rcAllocHeightfield();
	if (!m_solid)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'solid'.");
		return false;
	}
	if (!rcCreateHeightfield(m_ctx, *m_solid, m_cfg.width, m_cfg.height, m_cfg.bmin, m_cfg.bmax, m_cfg.cs, m_cfg.ch))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create solid heightfield.");
		return false;
	}
	
	// Allocate array that can hold triangle area types.
	// If you have multiple meshes you need to process, allocate
	// and array which can hold the max number of triangles you need to process.
	m_triareas = new unsigned char[ntris];
	if (!m_triareas)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'm_triareas' (%d).", ntris);
		return false;
	}
	
	// Find triangles which are walkable based on their slope and rasterize them.
	// If your input data is multiple meshes, you can transform them here, calculate
	// the are type for each of the meshes and rasterize them.
	memset(m_triareas, 0, ntris*sizeof(unsigned char));
	rcMarkWalkableTriangles(m_ctx, m_cfg.walkableSlopeAngle, verts, nverts, tris, ntris, m_triareas);
	rcRasterizeTriangles(m_ctx, verts, nverts, tris, m_triareas, ntris, *m_solid, m_cfg.walkableClimb);

	if (!m_keepInterResults)
	{
		delete [] m_triareas;
		m_triareas = 0;
	}
	
	//
	// Step 3. Filter walkables surfaces.
	//
	
	// Once all geoemtry is rasterized, we do initial pass of filtering to
	// remove unwanted overhangs caused by the conservative rasterization
	// as well as filter spans where the character cannot possibly stand.
	rcFilterLowHangingWalkableObstacles(m_ctx, m_cfg.walkableClimb, *m_solid);
	rcFilterLedgeSpans(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid);
	rcFilterWalkableLowHeightSpans(m_ctx, m_cfg.walkableHeight, *m_solid);


	//
	// Step 4. Partition walkable surface to simple regions.
	//

	// Compact the heightfield so that it is faster to handle from now on.
	// This will result more cache coherent data as well as the neighbours
	// between walkable cells will be calculated.
	m_chf = rcAllocCompactHeightfield();
	if (!m_chf)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'chf'.");
		return false;
	}
	if (!rcBuildCompactHeightfield(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid, *m_chf))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build compact data.");
		return false;
	}
	
	if (!m_keepInterResults)
	{
		rcFreeHeightField(m_solid);
		m_solid = 0;
	}
		
	// Erode the walkable area by agent radius.
	if (!rcErodeWalkableArea(m_ctx, m_cfg.walkableRadius, *m_chf))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not erode.");
		return false;
	}

	// (Optional) Mark areas.
	const ConvexVolume* vols = m_geom->getConvexVolumes();
	for (int i  = 0; i < m_geom->getConvexVolumeCount(); ++i)
		rcMarkConvexPolyArea(m_ctx, vols[i].verts, vols[i].nverts, vols[i].hmin, vols[i].hmax, (unsigned char)vols[i].area, *m_chf);

	
	// Partition the heightfield so that we can use simple algorithm later to triangulate the walkable areas.
	// There are 3 martitioning methods, each with some pros and cons:
	// 1) Watershed partitioning
	//   - the classic Recast partitioning
	//   - creates the nicest tessellation
	//   - usually slowest
	//   - partitions the heightfield into nice regions without holes or overlaps
	//   - the are some corner cases where this method creates produces holes and overlaps
	//      - holes may appear when a small obstacles is close to large open area (triangulation can handle this)
	//      - overlaps may occur if you have narrow spiral corridors (i.e stairs), this make triangulation to fail
	//   * generally the best choice if you precompute the nacmesh, use this if you have large open areas
	// 2) Monotone partioning
	//   - fastest
	//   - partitions the heightfield into regions without holes and overlaps (guaranteed)
	//   - creates long thin polygons, which sometimes causes paths with detours
	//   * use this if you want fast navmesh generation
	// 3) Layer partitoining
	//   - quite fast
	//   - partitions the heighfield into non-overlapping regions
	//   - relies on the triangulation code to cope with holes (thus slower than monotone partitioning)
	//   - produces better triangles than monotone partitioning
	//   - does not have the corner cases of watershed partitioning
	//   - can be slow and create a bit ugly tessellation (still better than monotone)
	//     if you have large open areas with small obstacles (not a problem if you use tiles)
	//   * good choice to use for tiled navmesh with medium and small sized tiles
	
	if (m_partitionType == SAMPLE_PARTITION_WATERSHED)
	{
		// Prepare for region partitioning, by calculating distance field along the walkable surface.
		if (!rcBuildDistanceField(m_ctx, *m_chf))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build distance field.");
			return false;
		}
		
		// Partition the walkable surface into simple regions without holes.
		if (!rcBuildRegions(m_ctx, *m_chf, 0, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build watershed regions.");
			return false;
		}
	}
	else if (m_partitionType == SAMPLE_PARTITION_MONOTONE)
	{
		// Partition the walkable surface into simple regions without holes.
		// Monotone partitioning does not need distancefield.
		if (!rcBuildRegionsMonotone(m_ctx, *m_chf, 0, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build monotone regions.");
			return false;
		}
	}
	else // SAMPLE_PARTITION_LAYERS
	{
		// Partition the walkable surface into simple regions without holes.
		if (!rcBuildLayerRegions(m_ctx, *m_chf, 0, m_cfg.minRegionArea))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build layer regions.");
			return false;
		}
	}
	
	//
	// Step 5. Trace and simplify region contours.
	//
	
	// Create contours.
	m_cset = rcAllocContourSet();
	if (!m_cset)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'cset'.");
		return false;
	}
	if (!rcBuildContours(m_ctx, *m_chf, m_cfg.maxSimplificationError, m_cfg.maxEdgeLen, *m_cset))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create contours.");
		return false;
	}
	
	//
	// Step 6. Build polygons mesh from contours.
	//
	
	// Build polygon navmesh from the contours.
	m_pmesh = rcAllocPolyMesh();
	if (!m_pmesh)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'pmesh'.");
		return false;
	}
	if (!rcBuildPolyMesh(m_ctx, *m_cset, m_cfg.maxVertsPerPoly, *m_pmesh))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not triangulate contours.");
		return false;
	}
	
	//
	// Step 7. Create detail mesh which allows to access approximate height on each polygon.
	//
	
	m_dmesh = rcAllocPolyMeshDetail();
	if (!m_dmesh)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'pmdtl'.");
		return false;
	}

	if (!rcBuildPolyMeshDetail(m_ctx, *m_pmesh, *m_chf, m_cfg.detailSampleDist, m_cfg.detailSampleMaxError, *m_dmesh))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build detail mesh.");
		return false;
	}

	if (!m_keepInterResults)
	{
		rcFreeCompactHeightfield(m_chf);
		m_chf = 0;
		rcFreeContourSet(m_cset);
		m_cset = 0;
	}

	// At this point the navigation mesh data is ready, you can access it from m_pmesh.
	// See duDebugDrawPolyMesh or dtCreateNavMeshData as examples how to access the data.
	
	//
	// (Optional) Step 8. Create Detour data from Recast poly mesh.
	//
	
	// The GUI may allow more max points per polygon than Detour can handle.
	// Only build the detour navmesh if we do not exceed the limit.
	if (m_cfg.maxVertsPerPoly <= DT_VERTS_PER_POLYGON)
	{
		unsigned char* navData = 0;
		int navDataSize = 0;

		// Update poly flags from areas.
		for (int i = 0; i < m_pmesh->npolys; ++i)
		{
			if (m_pmesh->areas[i] == RC_WALKABLE_AREA)
				m_pmesh->areas[i] = SAMPLE_POLYAREA_GROUND;
				
			if (m_pmesh->areas[i] == SAMPLE_POLYAREA_GROUND ||
				m_pmesh->areas[i] == SAMPLE_POLYAREA_GRASS ||
				m_pmesh->areas[i] == SAMPLE_POLYAREA_ROAD)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK;
			}
			else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_WATER)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_SWIM;
			}
			else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_DOOR)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK | SAMPLE_POLYFLAGS_DOOR;
			}
		}


		dtNavMeshCreateParams params;
		memset(&params, 0, sizeof(params));
		params.verts = m_pmesh->verts;
		params.vertCount = m_pmesh->nverts;
		params.polys = m_pmesh->polys;
		params.polyAreas = m_pmesh->areas;
		params.polyFlags = m_pmesh->flags;
		params.polyCount = m_pmesh->npolys;
		params.nvp = m_pmesh->nvp;
		params.detailMeshes = m_dmesh->meshes;
		params.detailVerts = m_dmesh->verts;
		params.detailVertsCount = m_dmesh->nverts;
		params.detailTris = m_dmesh->tris;
		params.detailTriCount = m_dmesh->ntris;
		params.offMeshConVerts = m_geom->getOffMeshConnectionVerts();
		params.offMeshConRad = m_geom->getOffMeshConnectionRads();
		params.offMeshConDir = m_geom->getOffMeshConnectionDirs();
		params.offMeshConAreas = m_geom->getOffMeshConnectionAreas();
		params.offMeshConFlags = m_geom->getOffMeshConnectionFlags();
		params.offMeshConUserID = m_geom->getOffMeshConnectionId();
		params.offMeshConCount = m_geom->getOffMeshConnectionCount();
		params.walkableHeight = m_agentHeight;
		params.walkableRadius = m_agentRadius;
		params.walkableClimb = m_agentMaxClimb;
		rcVcopy(params.bmin, m_pmesh->bmin);
		rcVcopy(params.bmax, m_pmesh->bmax);
		params.cs = m_cfg.cs;
		params.ch = m_cfg.ch;
		params.buildBvTree = true;
		
		if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
		{
			m_ctx->log(RC_LOG_ERROR, "Could not build Detour navmesh.");
			return false;
		}
		
		m_navMesh = dtAllocNavMesh();
		if (!m_navMesh)
		{
			dtFree(navData);
			m_ctx->log(RC_LOG_ERROR, "Could not create Detour navmesh");
			return false;
		}
		
		dtStatus status;
		
		status = m_navMesh->init(navData, navDataSize, DT_TILE_FREE_DATA);
		if (dtStatusFailed(status))
		{
			dtFree(navData);
			m_ctx->log(RC_LOG_ERROR, "Could not init Detour navmesh");
			return false;
		}
		
		status = m_navQuery->init(m_navMesh, 2048);
		if (dtStatusFailed(status))
		{
			m_ctx->log(RC_LOG_ERROR, "Could not init Detour navmesh query");
			return false;
		}
	}
	
	m_ctx->stopTimer(RC_TIMER_TOTAL);

	// Show performance stats.
	duLogBuildTimes(*m_ctx, m_ctx->getAccumulatedTime(RC_TIMER_TOTAL));
	m_ctx->log(RC_LOG_PROGRESS, ">> Polymesh: %d vertices  %d polygons", m_pmesh->nverts, m_pmesh->npolys);
	
	m_totalBuildTimeMs = m_ctx->getAccumulatedTime(RC_TIMER_TOTAL)/1000.0f;
	
	if (m_tool)
		m_tool->init(this);
	initToolStates(this);

	return true;
}
コード例 #4
0
void NavMeshCreator::computeNavMesh()
{
    // Reset build times gathering.
	m_context->resetTimers();
    
    // Start the build process.	
	m_context->startTimer(RC_TIMER_TOTAL);
    m_context->log(RC_LOG_PROGRESS, "NavMesh computation start");
    m_context->log(RC_LOG_PROGRESS, " - %.1fK vertices, %.1fK triangles", m_inputVerticesCount/1000.0f, m_inputTrianglesCount/1000.0f);
    
    if (m_success)
    {
        //Compute the grid size
        rcCalcGridSize(
                       m_min, 
                       m_max, 
                       m_voxelSize, 
                       &m_intermediateHeightfieldWidth, 
                       &m_intermediateHeightfieldHeight);
    }
    
    m_context->log(RC_LOG_PROGRESS, " - %d x %d = %d voxels", m_intermediateHeightfieldWidth, m_intermediateHeightfieldHeight, m_intermediateHeightfieldHeight * m_intermediateHeightfieldWidth);
    
    //Mark the walkable m_inputTriangles
    rcMarkWalkableTriangles(
                            m_context, 
                            m_maximumSlope, 
                            m_inputVertices, 
                            m_inputVerticesCount, 
                            m_inputTriangles, 
                            m_inputTrianglesCount, 
                            m_intermediateTriangleTags);
    
    
    
    // Build the heightfield
    m_success = m_success && (rcCreateHeightfield(
                                              m_context,
                                              *m_intermediateHeightfield,
                                              m_intermediateHeightfieldWidth,
                                              m_intermediateHeightfieldHeight,
                                              m_min,
                                              m_max,
                                              m_voxelSize,
                                              m_voxelHeight));
    
    // rasterize m_inputTriangles.
    rcRasterizeTriangles(
                         m_context,
                         m_inputVertices,
                         m_inputVerticesCount,
                         m_inputTriangles,
                         m_intermediateTriangleTags,
                         m_inputTrianglesCount,
                         *m_intermediateHeightfield,
                         static_cast<int>(floor(m_maximumStepHeight / m_voxelHeight)));
    
    // Filter voxels
    rcFilterLowHangingWalkableObstacles(
                                        m_context, 
                                        static_cast<int>(floor(m_maximumStepHeight / m_voxelHeight)), 
                                        *m_intermediateHeightfield);
    rcFilterLedgeSpans(
                       m_context, 
                       static_cast<int>(ceil(m_minimumCeilingClearance / m_voxelHeight)), 
                       static_cast<int>(floor(m_maximumStepHeight / m_voxelHeight)), 
                       *m_intermediateHeightfield);
    rcFilterWalkableLowHeightSpans(
                                   m_context, 
                                   static_cast<int>(ceil(m_minimumCeilingClearance / m_voxelHeight)), 
                                   *m_intermediateHeightfield);
    
    // Build the compact representation for the heightfield
    m_success = m_success && (rcBuildCompactHeightfield(
                                                    m_context,
                                                    static_cast<int>(ceil(m_minimumCeilingClearance / m_voxelHeight)),
                                                    static_cast<int>(floor(m_maximumStepHeight / m_voxelHeight)),
                                                    *m_intermediateHeightfield,
                                                    *m_intermediateCompactHeightfield));
    
    // Erode the navigatble area by minimum clearance to obstacles
    m_success = m_success && (rcErodeWalkableArea(
                                              m_context, 
                                              static_cast<int>(ceil(m_minimumObstacleClearance / m_voxelSize)), 
                                              *m_intermediateCompactHeightfield));
    
    // Prepare for region partitioning, by calculating distance field along the walkable surface.
    m_success = m_success && (rcBuildDistanceField(
                                               m_context, 
                                               *m_intermediateCompactHeightfield));
    
    // Partition the walkable surface into simple regions without holes.
    m_success = m_success && (rcBuildRegions(
                                         m_context, 
                                         *m_intermediateCompactHeightfield, 
                                         0, 
                                         rcSqr<int>(m_regionMinSize), 
                                         rcSqr<int>(m_regionMergeSize)));
    
    // Build the contours of the walkable surface
    m_success = m_success && (rcBuildContours(
                                          m_context,
                                          *m_intermediateCompactHeightfield,
                                          m_edgeMaxError,
                                          static_cast<int>(ceil(m_edgeMaxLength / m_voxelSize)),
                                          *m_intermediateContourSet));
    
    // Build the polygon mesh, i.e. the navigation mesh geometry
    m_success = m_success && (rcBuildPolyMesh(
                                          m_context,
                                          *m_intermediateContourSet,
                                          m_polyMaxNbVertices,
                                          *m_intermediatePolyMesh));
    
    //Build the detailed polygon mesh, i.e. the detail for the ground.
    m_success = m_success && (rcBuildPolyMeshDetail(
                                                m_context,
                                                *m_intermediatePolyMesh,
                                                *m_intermediateCompactHeightfield,
                                                m_sampleDist,
                                                m_sampleMaxError,
                                                *m_intermediatePolyMeshDetail));
    
    // Update poly flags from areas.
    for (int i = 0; m_success && i < m_intermediatePolyMesh->npolys; ++i)
    {
        switch(m_intermediatePolyMesh->areas[i])
        {
            case RC_WALKABLE_AREA:
                m_intermediatePolyMesh->areas[i] = area::Ground;
                break;
            case RC_NULL_AREA:
            default:
                m_intermediatePolyMesh->areas[i] = area::Obstacle;
                break;
        }
        switch(m_intermediatePolyMesh->areas[i])
        {
            case area::Ground:
                m_intermediatePolyMesh->flags[i] = navigationFlags::Walkable;
                break;
            case area::Obstacle:
            default:
                m_intermediatePolyMesh->flags[i] = navigationFlags::NonWalkable;
                break;
        }
    }
    
    if (m_polyMaxNbVertices > DT_VERTS_PER_POLYGON)
    {
        m_context->log(RC_LOG_ERROR, "NavMeshCreator: unable to create Detour NavMesh, the configured maximum number of vertex per polygon (%d) is over Detour's limit (%d).",m_polyMaxNbVertices,DT_VERTS_PER_POLYGON);
        m_success = false;
    }
    if (m_success)
    {
        memset(m_intermediateNavMeshCreateParams, 0, sizeof(dtNavMeshCreateParams));
        m_intermediateNavMeshCreateParams->verts = m_intermediatePolyMesh->verts;
        m_intermediateNavMeshCreateParams->vertCount = m_intermediatePolyMesh->nverts;
        m_intermediateNavMeshCreateParams->polys = m_intermediatePolyMesh->polys;
        m_intermediateNavMeshCreateParams->polyAreas = m_intermediatePolyMesh->areas;
        m_intermediateNavMeshCreateParams->polyFlags = m_intermediatePolyMesh->flags;
        m_intermediateNavMeshCreateParams->polyCount = m_intermediatePolyMesh->npolys;
        m_intermediateNavMeshCreateParams->nvp = m_intermediatePolyMesh->nvp;
        m_intermediateNavMeshCreateParams->detailMeshes = m_intermediatePolyMeshDetail->meshes;
        m_intermediateNavMeshCreateParams->detailVerts = m_intermediatePolyMeshDetail->verts;
        m_intermediateNavMeshCreateParams->detailVertsCount = m_intermediatePolyMeshDetail->nverts;
        m_intermediateNavMeshCreateParams->detailTris = m_intermediatePolyMeshDetail->tris;
        m_intermediateNavMeshCreateParams->detailTriCount = m_intermediatePolyMeshDetail->ntris;
        m_intermediateNavMeshCreateParams->offMeshConVerts = 0;
        m_intermediateNavMeshCreateParams->offMeshConRad = 0;
        m_intermediateNavMeshCreateParams->offMeshConDir = 0;
        m_intermediateNavMeshCreateParams->offMeshConAreas = 0;
        m_intermediateNavMeshCreateParams->offMeshConFlags = 0;
        m_intermediateNavMeshCreateParams->offMeshConUserID = 0;
        m_intermediateNavMeshCreateParams->offMeshConCount = 0;
        m_intermediateNavMeshCreateParams->walkableHeight = m_minimumCeilingClearance;
        m_intermediateNavMeshCreateParams->walkableRadius = m_minimumObstacleClearance;
        m_intermediateNavMeshCreateParams->walkableClimb = m_maximumStepHeight;
        rcVcopy(m_intermediateNavMeshCreateParams->bmin, m_intermediatePolyMesh->bmin);
        rcVcopy(m_intermediateNavMeshCreateParams->bmax, m_intermediatePolyMesh->bmax);
        m_intermediateNavMeshCreateParams->cs = m_voxelSize;
        m_intermediateNavMeshCreateParams->ch = m_voxelHeight;
        m_intermediateNavMeshCreateParams->buildBvTree = true;
    }
    
    if (m_success)
    {
        m_outputNavMeshBuffer = 0;
        m_outputNavMeshBufferSize = 0;
        if (!dtCreateNavMeshData(m_intermediateNavMeshCreateParams, &m_outputNavMeshBuffer, &m_outputNavMeshBufferSize))
        {
            m_context->log(RC_LOG_ERROR, "NavMeshCreator: unable to create the detour navmesh data.");
            m_success = false;
        }
    }
    m_context->stopTimer(RC_TIMER_TOTAL);
    
    if (m_success)
    {
        duLogBuildTimes(*m_context, m_context->getAccumulatedTime(RC_TIMER_TOTAL));
    }
}
コード例 #5
0
ファイル: TileBuilder.cpp プロジェクト: Allowed/SkyFire_5xx
uint8* TileBuilder::Build(bool dbg, dtNavMeshParams& navMeshParams)
{
    _Geometry = new Geometry();
    _Geometry->Transform = true;
    ADT* adt = new ADT(Utils::GetAdtPath(World, X, Y));
    adt->Read();
    _Geometry->AddAdt(adt);
    delete adt;

    if (_Geometry->Vertices.empty() && _Geometry->Triangles.empty())
        return NULL;

    // again, we load everything - wasteful but who cares
    for (int ty = Y - 2; ty <= Y + 2; ty++)
    {
        for (int tx = X - 2; tx <= X + 2; tx++)
        {
            // don't load main tile again
            if (tx == X && ty == Y)
                continue;

            ADT* _adt = new ADT(Utils::GetAdtPath(World, tx, ty));
            // If this condition is met, it means that this wdt does not contain the ADT
            if (!_adt->Data->Stream)
            {
                delete _adt;
                continue;
            }
            _adt->Read();
            _Geometry->AddAdt(_adt);
            delete _adt;
        }
    }

    if (dbg)
    {
        char buff[100];
        sprintf(buff, "mmaps/%s_%02u%02u.obj", World.c_str(), Y, X);
        FILE* debug = fopen(buff, "wb");
        for (uint32 i = 0; i < _Geometry->Vertices.size(); ++i)
            fprintf(debug, "v %f %f %f\n", _Geometry->Vertices[i].x, _Geometry->Vertices[i].y, _Geometry->Vertices[i].z);
        for (uint32 i = 0; i < _Geometry->Triangles.size(); ++i)
            fprintf(debug, "f %i %i %i\n", _Geometry->Triangles[i].V0 + 1, _Geometry->Triangles[i].V1 + 1, _Geometry->Triangles[i].V2 + 1);
        fclose(debug);
    }

    uint32 numVerts = _Geometry->Vertices.size();
    uint32 numTris = _Geometry->Triangles.size();
    float* vertices;
    int* triangles;
    uint8* areas;
    _Geometry->GetRawData(vertices, triangles, areas);
    _Geometry->Vertices.clear();
    _Geometry->Triangles.clear();


    rcVcopy(Config.bmin, cBuilder->bmin);
    rcVcopy(Config.bmax, cBuilder->bmax);

    // this sets the dimensions of the heightfield - should maybe happen before border padding
    rcCalcGridSize(Config.bmin, Config.bmax, Config.cs, &Config.width, &Config.height);

    // Initialize per tile config.
    rcConfig tileCfg = Config;
    tileCfg.width = Config.tileSize + Config.borderSize * 2;
    tileCfg.height = Config.tileSize + Config.borderSize * 2;

    // merge per tile poly and detail meshes
    rcPolyMesh** pmmerge = new rcPolyMesh*[Constants::TilesPerMap * Constants::TilesPerMap];
    rcPolyMeshDetail** dmmerge = new rcPolyMeshDetail*[Constants::TilesPerMap * Constants::TilesPerMap];

    int nmerge = 0;
    for (int y = 0; y < Constants::TilesPerMap; ++y)
    {
        for (int x = 0; x < Constants::TilesPerMap; ++x)
        {
            // Calculate the per tile bounding box.
            tileCfg.bmin[0] = Config.bmin[0] + float(x * Config.tileSize - Config.borderSize) * Config.cs;
            tileCfg.bmin[2] = Config.bmin[2] + float(y * Config.tileSize - Config.borderSize) * Config.cs;
            tileCfg.bmax[0] = Config.bmin[0] + float((x + 1) * Config.tileSize + Config.borderSize) * Config.cs;
            tileCfg.bmax[2] = Config.bmin[2] + float((y + 1) * Config.tileSize + Config.borderSize) * Config.cs;


            rcHeightfield* hf = rcAllocHeightfield();
            rcCreateHeightfield(Context, *hf, tileCfg.width, tileCfg.height, tileCfg.bmin, tileCfg.bmax, tileCfg.cs, tileCfg.ch);
            rcClearUnwalkableTriangles(Context, tileCfg.walkableSlopeAngle, vertices, numVerts, triangles, numTris, areas);
            rcRasterizeTriangles(Context, vertices, numVerts, triangles, areas, numTris, *hf, Config.walkableClimb);

            // Once all geometry is rasterized, we do initial pass of filtering to
            // remove unwanted overhangs caused by the conservative rasterization
            // as well as filter spans where the character cannot possibly stand.
            rcFilterLowHangingWalkableObstacles(Context, Config.walkableClimb, *hf);
            rcFilterLedgeSpans(Context, tileCfg.walkableHeight, tileCfg.walkableClimb, *hf);
            rcFilterWalkableLowHeightSpans(Context, tileCfg.walkableHeight, *hf);

            // Compact the heightfield so that it is faster to handle from now on.
            // This will result in more cache coherent data as well as the neighbours
            // between walkable cells will be calculated.
            rcCompactHeightfield* chf = rcAllocCompactHeightfield();
            rcBuildCompactHeightfield(Context, tileCfg.walkableHeight, tileCfg.walkableClimb, *hf, *chf);

            rcFreeHeightField(hf);

            // Erode the walkable area by agent radius.
            rcErodeWalkableArea(Context, Config.walkableRadius, *chf);
            // Prepare for region partitioning, by calculating distance field along the walkable surface.
            rcBuildDistanceField(Context, *chf);
            // Partition the walkable surface into simple regions without holes.
            rcBuildRegions(Context, *chf, tileCfg.borderSize, tileCfg.minRegionArea, tileCfg.mergeRegionArea);

            // Create contours.
            rcContourSet* cset = rcAllocContourSet();
            rcBuildContours(Context, *chf, tileCfg.maxSimplificationError, tileCfg.maxEdgeLen, *cset);

            // Build polygon navmesh from the contours.
            rcPolyMesh* pmesh = rcAllocPolyMesh();
            rcBuildPolyMesh(Context, *cset, tileCfg.maxVertsPerPoly, *pmesh);

            // Build detail mesh.
            rcPolyMeshDetail* dmesh = rcAllocPolyMeshDetail();
            rcBuildPolyMeshDetail(Context, *pmesh, *chf, tileCfg.detailSampleDist, tileCfg.detailSampleMaxError, *dmesh);

            // Free memory
            rcFreeCompactHeightfield(chf);
            rcFreeContourSet(cset);

            pmmerge[nmerge] = pmesh;
            dmmerge[nmerge] = dmesh;
            ++nmerge;
        }
    }

    rcPolyMesh* pmesh = rcAllocPolyMesh();
    rcMergePolyMeshes(Context, pmmerge, nmerge, *pmesh);

    rcPolyMeshDetail* dmesh = rcAllocPolyMeshDetail();
    rcMergePolyMeshDetails(Context, dmmerge, nmerge, *dmesh);

    delete[] pmmerge;
    delete[] dmmerge;

    printf("[%02i,%02i] Meshes merged!\n", X, Y);

    // Remove padding from the polymesh data. (Remove this odditity)
    for (int i = 0; i < pmesh->nverts; ++i)
    {
        unsigned short* v = &pmesh->verts[i * 3];
        v[0] -= (unsigned short)Config.borderSize;
        v[2] -= (unsigned short)Config.borderSize;
    }

    // Set flags according to area types (e.g. Swim for Water)
    for (int i = 0; i < pmesh->npolys; i++)
    {
        if (pmesh->areas[i] == Constants::POLY_AREA_ROAD || pmesh->areas[i] == Constants::POLY_AREA_TERRAIN)
            pmesh->flags[i] = Constants::POLY_FLAG_WALK;
        else if (pmesh->areas[i] == Constants::POLY_AREA_WATER)
            pmesh->flags[i] = Constants::POLY_FLAG_SWIM;
    }

    dtNavMeshCreateParams params;
    memset(&params, 0, sizeof(params));
    // PolyMesh data
    params.verts = pmesh->verts;
    params.vertCount = pmesh->nverts;
    params.polys = pmesh->polys;
    params.polyAreas = pmesh->areas;
    params.polyFlags = pmesh->flags;
    params.polyCount = pmesh->npolys;
    params.nvp = pmesh->nvp;
    // PolyMeshDetail data
    params.detailMeshes = dmesh->meshes;
    params.detailVerts = dmesh->verts;
    params.detailVertsCount = dmesh->nverts;
    params.detailTris = dmesh->tris;
    params.detailTriCount = dmesh->ntris;
    rcVcopy(params.bmin, pmesh->bmin);
    rcVcopy(params.bmax, pmesh->bmax);
    // General settings
    params.ch = Config.ch;
    params.cs = Config.cs;
    params.walkableClimb = Constants::BaseUnitDim * Config.walkableClimb;
    params.walkableHeight = Constants::BaseUnitDim * Config.walkableHeight;
    params.walkableRadius = Constants::BaseUnitDim * Config.walkableRadius;
    params.tileX = (((cBuilder->bmin[0] + cBuilder->bmax[0]) / 2) - navMeshParams.orig[0]) / Constants::TileSize;
    params.tileY = (((cBuilder->bmin[2] + cBuilder->bmax[2]) / 2) - navMeshParams.orig[2]) / Constants::TileSize;

    rcVcopy(params.bmin, cBuilder->bmin);
    rcVcopy(params.bmax, cBuilder->bmax);

    // Offmesh-connection settings
    params.offMeshConCount = 0; // none for now

    params.tileSize = Constants::VertexPerMap;

    if (!params.polyCount || !params.polys || Constants::TilesPerMap * Constants::TilesPerMap == params.polyCount)
    {
        // we have flat tiles with no actual geometry - don't build those, its useless
        // keep in mind that we do output those into debug info
        // drop tiles with only exact count - some tiles may have geometry while having less tiles
        printf("[%02i,%02i] No polygons to build on tile, skipping.\n", X, Y);
        rcFreePolyMesh(pmesh);
        rcFreePolyMeshDetail(dmesh);
        delete areas;
        delete triangles;
        delete vertices;
        return NULL;
    }

    int navDataSize;
    uint8* navData;
    printf("[%02i,%02i] Creating the navmesh with %i vertices, %i polys, %i triangles!\n", X, Y, pmesh->nverts, pmesh->npolys, dmesh->ntris);
    bool result = dtCreateNavMeshData(&params, &navData, &navDataSize);

    // Free some memory
    rcFreePolyMesh(pmesh);
    rcFreePolyMeshDetail(dmesh);
    delete areas;
    delete triangles;
    delete vertices;

    if (result)
    {
        printf("[%02i,%02i] NavMesh created, size %i!\n", X, Y, navDataSize);
        DataSize = navDataSize;
        return navData;
    }

    return NULL;
}
コード例 #6
0
ファイル: navMesh.cpp プロジェクト: belzilep/Torque3D
   bool NavMesh::createPolyMesh(rcConfig &cfg, NavModelData &data, rcContext *ctx)
   {
      // Create a heightfield to voxelise our input geometry
      hf = rcAllocHeightfield();
      if(!hf || !rcCreateHeightfield(ctx, *hf, cfg.width, cfg.height, cfg.bmin, cfg.bmax, cfg.cs, cfg.ch))
      {
         Con::errorf("Could not generate rcHeightField for NavMesh %s", getIdString());
         return false;
      }

      unsigned char *areas = new unsigned char[data.getTriCount()];
      if (!areas)
      {
         Con::errorf("Out of memory (area flags) for NavMesh %s", getIdString());
         return false;
      }
      memset(areas, 0, data.getTriCount()*sizeof(unsigned char));

      // Subtract 1 from all indices!
      for(U32 i = 0; i < data.getTriCount(); i++)
      {
         data.tris[i*3]--;
         data.tris[i*3+1]--;
         data.tris[i*3+2]--;
      }

      // Filter triangles by angle and rasterize
      rcMarkWalkableTriangles(ctx, cfg.walkableSlopeAngle,
         data.getVerts(), data.getVertCount(),
         data.getTris(), data.getTriCount(), areas);
      rcRasterizeTriangles(ctx, data.getVerts(), data.getVertCount(),
         data.getTris(), areas, data.getTriCount(),
         *hf, cfg.walkableClimb);

      delete [] areas;

      // Filter out areas with low ceilings and other stuff
      rcFilterLowHangingWalkableObstacles(ctx, cfg.walkableClimb, *hf);
      rcFilterLedgeSpans(ctx, cfg.walkableHeight, cfg.walkableClimb, *hf);
      rcFilterWalkableLowHeightSpans(ctx, cfg.walkableHeight, *hf);

      chf = rcAllocCompactHeightfield();
      if(!chf || !rcBuildCompactHeightfield(ctx, cfg.walkableHeight, cfg.walkableClimb, *hf, *chf))
      {
         Con::errorf("Could not generate rcCompactHeightField for NavMesh %s", getIdString());
         return false;
      }
      if(!rcErodeWalkableArea(ctx, cfg.walkableRadius, *chf))
      {
         Con::errorf("Could not erode walkable area for NavMesh %s", getIdString());
         return false;
      }
      if(false)
      {
         if(!rcBuildRegionsMonotone(ctx, *chf, cfg.borderSize, cfg.minRegionArea, cfg.mergeRegionArea))
         {
            Con::errorf("Could not build regions for NavMesh %s", getIdString());
            return false;
         }
      }
      else
      {
         if(!rcBuildDistanceField(ctx, *chf))
            return false;
         if(!rcBuildRegions(ctx, *chf, cfg.borderSize, cfg.minRegionArea, cfg.mergeRegionArea))
            return false;
      }

      cs = rcAllocContourSet();
      if(!cs || !rcBuildContours(ctx, *chf, cfg.maxSimplificationError, cfg.maxEdgeLen, *cs))
      {
         Con::errorf("Could not construct rcContourSet for NavMesh %s", getIdString());
         return false;
      }

      pm = rcAllocPolyMesh();
      if(!pm || !rcBuildPolyMesh(ctx, *cs, cfg.maxVertsPerPoly, *pm))
      {
         Con::errorf("Could not construct rcPolyMesh for NavMesh %s", getIdString());
         return false;
      }

      pmd = rcAllocPolyMeshDetail();
      if(!pmd || !rcBuildPolyMeshDetail(ctx, *pm, *chf, cfg.detailSampleDist, cfg.detailSampleMaxError, *pmd))
      {
         Con::errorf("Could not construct rcPolyMeshDetail for NavMesh %s", getIdString());
         return false;
      }

      return true;
   }
コード例 #7
0
ファイル: TileBuilder.cpp プロジェクト: Exodius/DeathCore
uint8* TileBuilder::BuildTiled(dtNavMeshParams& navMeshParams)
{
    _Geometry = new Geometry();
    _Geometry->Transform = true;
    ADT* adt = new ADT(Utils::GetAdtPath(World, X, Y), X, Y);
    adt->Read();
    _Geometry->AddAdt(adt);
    delete adt;

    if (_Geometry->Vertices.empty() && _Geometry->Triangles.empty())
        return NULL;

    float* bmin = NULL, *bmax = NULL;
    CalculateTileBounds(bmin, bmax, navMeshParams);
    _Geometry->CalculateMinMaxHeight(bmin[1], bmax[1]);

    // again, we load everything - wasteful but who cares
    for (int ty = Y - 1; ty <= Y + 1; ty++)
    {
        for (int tx = X - 1; tx <= X + 1; tx++)
        {
            // don't load main tile again
            if (tx == X && ty == Y)
                continue;

            ADT* _adt = new ADT(Utils::GetAdtPath(World, tx, ty), tx, ty);
            // If this condition is met, it means that this WDT does not contain the ADT
            if (!_adt->Data->Stream)
            {
                delete _adt;
                continue;
            }
            _adt->Read();
            _Geometry->AddAdt(_adt);
            delete _adt;
        }
    }

    OutputDebugVertices();
    
    uint32 numVerts = _Geometry->Vertices.size();
    uint32 numTris = _Geometry->Triangles.size();
    float* vertices;
    int* triangles;
    uint8* areas;
    _Geometry->GetRawData(vertices, triangles, areas);
    _Geometry->Vertices.clear();
    _Geometry->Triangles.clear();

    // add border
    bmin[0] -= Config.borderSize * Config.cs;
    bmin[2] -= Config.borderSize * Config.cs;
    bmax[0] += Config.borderSize * Config.cs;
    bmax[2] += Config.borderSize * Config.cs;

    rcHeightfield* hf = rcAllocHeightfield();
    int width = Config.tileSize + (Config.borderSize * 2);
    rcCreateHeightfield(Context, *hf, width, width, bmin, bmax, Config.cs, Config.ch);

    rcClearUnwalkableTriangles(Context, Config.walkableSlopeAngle, vertices, numVerts, triangles, numTris, areas);
    rcRasterizeTriangles(Context, vertices, numVerts, triangles, areas, numTris, *hf, Config.walkableClimb);

    rcFilterLowHangingWalkableObstacles(Context, Config.walkableClimb, *hf);
    rcFilterLedgeSpans(Context, Config.walkableHeight, Config.walkableClimb, *hf);
    rcFilterWalkableLowHeightSpans(Context, Config.walkableHeight, *hf);

    rcCompactHeightfield* chf = rcAllocCompactHeightfield();
    rcBuildCompactHeightfield(Context, Config.walkableHeight, Config.walkableClimb, *hf, *chf);

    rcErodeWalkableArea(Context, Config.walkableRadius, *chf);
    rcBuildDistanceField(Context, *chf);
    rcBuildRegions(Context, *chf, Config.borderSize, Config.minRegionArea, Config.mergeRegionArea);

    rcContourSet* contours = rcAllocContourSet();
    rcBuildContours(Context, *chf, Config.maxSimplificationError, Config.maxEdgeLen, *contours);

    rcPolyMesh* pmesh = rcAllocPolyMesh();
    rcBuildPolyMesh(Context, *contours, Config.maxVertsPerPoly, *pmesh);

    rcPolyMeshDetail* dmesh = rcAllocPolyMeshDetail();
    rcBuildPolyMeshDetail(Context, *pmesh, *chf, Config.detailSampleDist, Config.detailSampleMaxError, *dmesh);

    // Set flags according to area types (e.g. Swim for Water)
    for (int i = 0; i < pmesh->npolys; i++)
    {
        if (pmesh->areas[i] == Constants::POLY_AREA_ROAD || pmesh->areas[i] == Constants::POLY_AREA_TERRAIN)
            pmesh->flags[i] = Constants::POLY_FLAG_WALK;
        else if (pmesh->areas[i] == Constants::POLY_AREA_WATER)
            pmesh->flags[i] = Constants::POLY_FLAG_SWIM;
    }

    dtNavMeshCreateParams params;
    memset(&params, 0, sizeof(params));
    // PolyMesh data
    params.verts = pmesh->verts;
    params.vertCount = pmesh->nverts;
    params.polys = pmesh->polys;
    params.polyAreas = pmesh->areas;
    params.polyFlags = pmesh->flags;
    params.polyCount = pmesh->npolys;
    params.nvp = pmesh->nvp;
    // PolyMeshDetail data
    params.detailMeshes = dmesh->meshes;
    params.detailVerts = dmesh->verts;
    params.detailVertsCount = dmesh->nverts;
    params.detailTris = dmesh->tris;
    params.detailTriCount = dmesh->ntris;
    // General settings
    params.ch = Config.ch;
    params.cs = Config.cs;
    params.walkableClimb = Config.walkableClimb * Config.ch;
    params.walkableHeight = Config.walkableHeight * Config.ch;
    params.walkableRadius = Config.walkableRadius * Config.cs;
    params.tileX = X;
    params.tileY = Y;
    params.tileLayer = 0;
    params.buildBvTree = true;

    // Recalculate the bounds with the added geometry
    float* bmin2 = NULL, *bmax2 = NULL;
    CalculateTileBounds(bmin2, bmax2, navMeshParams);
    bmin2[1] = bmin[1];
    bmax2[1] = bmax[1];

    rcVcopy(params.bmax, bmax2);
    rcVcopy(params.bmin, bmin2);

    // Offmesh-connection settings
    params.offMeshConCount = 0; // none for now

    rcFreeHeightField(hf);
    rcFreeCompactHeightfield(chf);
    rcFreeContourSet(contours);
    delete vertices;
    delete triangles;
    delete areas;
    delete bmin;
    delete bmax;

    if (!params.polyCount || !params.polys || Constants::TilesPerMap * Constants::TilesPerMap == params.polyCount)
    {
        // we have flat tiles with no actual geometry - don't build those, its useless
        // keep in mind that we do output those into debug info
        // drop tiles with only exact count - some tiles may have geometry while having less tiles
        printf("[%02i, %02i] No polygons to build on tile, skipping.\n", X, Y);
        rcFreePolyMesh(pmesh);
        rcFreePolyMeshDetail(dmesh);
        return NULL;
    }

    int navDataSize;
    uint8* navData;
    printf("[%02i, %02i] Creating the navmesh with %i vertices, %i polys, %i triangles!\n", X, Y, params.vertCount, params.polyCount, params.detailTriCount);
    bool result = dtCreateNavMeshData(&params, &navData, &navDataSize);

    rcFreePolyMesh(pmesh);
    rcFreePolyMeshDetail(dmesh);

    if (result)
    {
        printf("[%02i, %02i] NavMesh created, size %i!\n", X, Y, navDataSize);
        DataSize = navDataSize;
        return navData;
    }

    return NULL;
}
コード例 #8
0
unsigned char* Sample_TileMesh::buildTileMesh(const int tx, const int ty, const float* bmin, const float* bmax, int& dataSize)
{
	if (!m_geom || !m_geom->getMesh() || !m_geom->getChunkyMesh())
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Input mesh is not specified.");
		return 0;
	}
	
	m_tileMemUsage = 0;
	m_tileBuildTime = 0;
	
	cleanup();
	
	const float* verts = m_geom->getMesh()->getVerts();
	const int nverts = m_geom->getMesh()->getVertCount();
	const int ntris = m_geom->getMesh()->getTriCount();
	const rcChunkyTriMesh* chunkyMesh = m_geom->getChunkyMesh();
		
	// Init build configuration from GUI
	memset(&m_cfg, 0, sizeof(m_cfg));
	m_cfg.cs = m_cellSize;
	m_cfg.ch = m_cellHeight;
	m_cfg.walkableSlopeAngle = m_agentMaxSlope;
	m_cfg.walkableHeight = (int)ceilf(m_agentHeight / m_cfg.ch);
	m_cfg.walkableClimb = (int)floorf(m_agentMaxClimb / m_cfg.ch);
	m_cfg.walkableRadius = (int)ceilf(m_agentRadius / m_cfg.cs);
	m_cfg.maxEdgeLen = (int)(m_edgeMaxLen / m_cellSize);
	m_cfg.maxSimplificationError = m_edgeMaxError;
	m_cfg.minRegionArea = (int)rcSqr(m_regionMinSize);		// Note: area = size*size
	m_cfg.mergeRegionArea = (int)rcSqr(m_regionMergeSize);	// Note: area = size*size
	m_cfg.maxVertsPerPoly = (int)m_vertsPerPoly;
	m_cfg.tileSize = (int)m_tileSize;
	m_cfg.borderSize = m_cfg.walkableRadius + 3; // Reserve enough padding.
	m_cfg.width = m_cfg.tileSize + m_cfg.borderSize*2;
	m_cfg.height = m_cfg.tileSize + m_cfg.borderSize*2;
	m_cfg.detailSampleDist = m_detailSampleDist < 0.9f ? 0 : m_cellSize * m_detailSampleDist;
	m_cfg.detailSampleMaxError = m_cellHeight * m_detailSampleMaxError;
	
	// Expand the heighfield bounding box by border size to find the extents of geometry we need to build this tile.
	//
	// This is done in order to make sure that the navmesh tiles connect correctly at the borders,
	// and the obstacles close to the border work correctly with the dilation process.
	// No polygons (or contours) will be created on the border area.
	//
	// IMPORTANT!
	//
	//   :''''''''':
	//   : +-----+ :
	//   : |     | :
	//   : |     |<--- tile to build
	//   : |     | :  
	//   : +-----+ :<-- geometry needed
	//   :.........:
	//
	// You should use this bounding box to query your input geometry.
	//
	// For example if you build a navmesh for terrain, and want the navmesh tiles to match the terrain tile size
	// you will need to pass in data from neighbour terrain tiles too! In a simple case, just pass in all the 8 neighbours,
	// or use the bounding box below to only pass in a sliver of each of the 8 neighbours.
	rcVcopy(m_cfg.bmin, bmin);
	rcVcopy(m_cfg.bmax, bmax);
	m_cfg.bmin[0] -= m_cfg.borderSize*m_cfg.cs;
	m_cfg.bmin[2] -= m_cfg.borderSize*m_cfg.cs;
	m_cfg.bmax[0] += m_cfg.borderSize*m_cfg.cs;
	m_cfg.bmax[2] += m_cfg.borderSize*m_cfg.cs;
	
	// Reset build times gathering.
	m_ctx->resetTimers();
	
	// Start the build process.
	m_ctx->startTimer(RC_TIMER_TOTAL);
	
	m_ctx->log(RC_LOG_PROGRESS, "Building navigation:");
	m_ctx->log(RC_LOG_PROGRESS, " - %d x %d cells", m_cfg.width, m_cfg.height);
	m_ctx->log(RC_LOG_PROGRESS, " - %.1fK verts, %.1fK tris", nverts/1000.0f, ntris/1000.0f);
	
	// Allocate voxel heightfield where we rasterize our input data to.
	m_solid = rcAllocHeightfield();
	if (!m_solid)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'solid'.");
		return 0;
	}
	if (!rcCreateHeightfield(m_ctx, *m_solid, m_cfg.width, m_cfg.height, m_cfg.bmin, m_cfg.bmax, m_cfg.cs, m_cfg.ch))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create solid heightfield.");
		return 0;
	}
	
	// Allocate array that can hold triangle flags.
	// If you have multiple meshes you need to process, allocate
	// and array which can hold the max number of triangles you need to process.
	m_triareas = new unsigned char[chunkyMesh->maxTrisPerChunk];
	if (!m_triareas)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'm_triareas' (%d).", chunkyMesh->maxTrisPerChunk);
		return 0;
	}
	
	float tbmin[2], tbmax[2];
	tbmin[0] = m_cfg.bmin[0];
	tbmin[1] = m_cfg.bmin[2];
	tbmax[0] = m_cfg.bmax[0];
	tbmax[1] = m_cfg.bmax[2];
	int cid[512];// TODO: Make grow when returning too many items.
	const int ncid = rcGetChunksOverlappingRect(chunkyMesh, tbmin, tbmax, cid, 512);
	if (!ncid)
		return 0;
	
	m_tileTriCount = 0;
	
	for (int i = 0; i < ncid; ++i)
	{
		const rcChunkyTriMeshNode& node = chunkyMesh->nodes[cid[i]];
		const int* ctris = &chunkyMesh->tris[node.i*3];
		const int nctris = node.n;
		
		m_tileTriCount += nctris;
		
		memset(m_triareas, 0, nctris*sizeof(unsigned char));
		rcMarkWalkableTriangles(m_ctx, m_cfg.walkableSlopeAngle,
								verts, nverts, ctris, nctris, m_triareas);
		
		if (!rcRasterizeTriangles(m_ctx, verts, nverts, ctris, m_triareas, nctris, *m_solid, m_cfg.walkableClimb))
			return 0;
	}
	
	if (!m_keepInterResults)
	{
		delete [] m_triareas;
		m_triareas = 0;
	}
	
	// Once all geometry is rasterized, we do initial pass of filtering to
	// remove unwanted overhangs caused by the conservative rasterization
	// as well as filter spans where the character cannot possibly stand.
	if (m_filterLowHangingObstacles)
		rcFilterLowHangingWalkableObstacles(m_ctx, m_cfg.walkableClimb, *m_solid);
	if (m_filterLedgeSpans)
		rcFilterLedgeSpans(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid);
	if (m_filterWalkableLowHeightSpans)
		rcFilterWalkableLowHeightSpans(m_ctx, m_cfg.walkableHeight, *m_solid);
	
	// Compact the heightfield so that it is faster to handle from now on.
	// This will result more cache coherent data as well as the neighbours
	// between walkable cells will be calculated.
	m_chf = rcAllocCompactHeightfield();
	if (!m_chf)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'chf'.");
		return 0;
	}
	if (!rcBuildCompactHeightfield(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid, *m_chf))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build compact data.");
		return 0;
	}
	
	if (!m_keepInterResults)
	{
		rcFreeHeightField(m_solid);
		m_solid = 0;
	}

	// Erode the walkable area by agent radius.
	if (!rcErodeWalkableArea(m_ctx, m_cfg.walkableRadius, *m_chf))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not erode.");
		return 0;
	}

	// (Optional) Mark areas.
	const ConvexVolume* vols = m_geom->getConvexVolumes();
	for (int i  = 0; i < m_geom->getConvexVolumeCount(); ++i)
		rcMarkConvexPolyArea(m_ctx, vols[i].verts, vols[i].nverts, vols[i].hmin, vols[i].hmax, (unsigned char)vols[i].area, *m_chf);
	
	
	// Partition the heightfield so that we can use simple algorithm later to triangulate the walkable areas.
	// There are 3 martitioning methods, each with some pros and cons:
	// 1) Watershed partitioning
	//   - the classic Recast partitioning
	//   - creates the nicest tessellation
	//   - usually slowest
	//   - partitions the heightfield into nice regions without holes or overlaps
	//   - the are some corner cases where this method creates produces holes and overlaps
	//      - holes may appear when a small obstacles is close to large open area (triangulation can handle this)
	//      - overlaps may occur if you have narrow spiral corridors (i.e stairs), this make triangulation to fail
	//   * generally the best choice if you precompute the nacmesh, use this if you have large open areas
	// 2) Monotone partioning
	//   - fastest
	//   - partitions the heightfield into regions without holes and overlaps (guaranteed)
	//   - creates long thin polygons, which sometimes causes paths with detours
	//   * use this if you want fast navmesh generation
	// 3) Layer partitoining
	//   - quite fast
	//   - partitions the heighfield into non-overlapping regions
	//   - relies on the triangulation code to cope with holes (thus slower than monotone partitioning)
	//   - produces better triangles than monotone partitioning
	//   - does not have the corner cases of watershed partitioning
	//   - can be slow and create a bit ugly tessellation (still better than monotone)
	//     if you have large open areas with small obstacles (not a problem if you use tiles)
	//   * good choice to use for tiled navmesh with medium and small sized tiles
	
	if (m_partitionType == SAMPLE_PARTITION_WATERSHED)
	{
		// Prepare for region partitioning, by calculating distance field along the walkable surface.
		if (!rcBuildDistanceField(m_ctx, *m_chf))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build distance field.");
			return 0;
		}
		
		// Partition the walkable surface into simple regions without holes.
		if (!rcBuildRegions(m_ctx, *m_chf, m_cfg.borderSize, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build watershed regions.");
			return 0;
		}
	}
	else if (m_partitionType == SAMPLE_PARTITION_MONOTONE)
	{
		// Partition the walkable surface into simple regions without holes.
		// Monotone partitioning does not need distancefield.
		if (!rcBuildRegionsMonotone(m_ctx, *m_chf, m_cfg.borderSize, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build monotone regions.");
			return 0;
		}
	}
	else // SAMPLE_PARTITION_LAYERS
	{
		// Partition the walkable surface into simple regions without holes.
		if (!rcBuildLayerRegions(m_ctx, *m_chf, m_cfg.borderSize, m_cfg.minRegionArea))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build layer regions.");
			return 0;
		}
	}
	 	
	// Create contours.
	m_cset = rcAllocContourSet();
	if (!m_cset)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'cset'.");
		return 0;
	}
	if (!rcBuildContours(m_ctx, *m_chf, m_cfg.maxSimplificationError, m_cfg.maxEdgeLen, *m_cset))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create contours.");
		return 0;
	}
	
	if (m_cset->nconts == 0)
	{
		return 0;
	}
	
	// Build polygon navmesh from the contours.
	m_pmesh = rcAllocPolyMesh();
	if (!m_pmesh)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'pmesh'.");
		return 0;
	}
	if (!rcBuildPolyMesh(m_ctx, *m_cset, m_cfg.maxVertsPerPoly, *m_pmesh))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not triangulate contours.");
		return 0;
	}
	
	// Build detail mesh.
	m_dmesh = rcAllocPolyMeshDetail();
	if (!m_dmesh)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'dmesh'.");
		return 0;
	}
	
	if (!rcBuildPolyMeshDetail(m_ctx, *m_pmesh, *m_chf,
							   m_cfg.detailSampleDist, m_cfg.detailSampleMaxError,
							   *m_dmesh))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could build polymesh detail.");
		return 0;
	}
	
	if (!m_keepInterResults)
	{
		rcFreeCompactHeightfield(m_chf);
		m_chf = 0;
		rcFreeContourSet(m_cset);
		m_cset = 0;
	}
	
	unsigned char* navData = 0;
	int navDataSize = 0;
	if (m_cfg.maxVertsPerPoly <= DT_VERTS_PER_POLYGON)
	{
		if (m_pmesh->nverts >= 0xffff)
		{
			// The vertex indices are ushorts, and cannot point to more than 0xffff vertices.
			m_ctx->log(RC_LOG_ERROR, "Too many vertices per tile %d (max: %d).", m_pmesh->nverts, 0xffff);
			return 0;
		}
		
		// Update poly flags from areas.
		for (int i = 0; i < m_pmesh->npolys; ++i)
		{
			if (m_pmesh->areas[i] == RC_WALKABLE_AREA)
				m_pmesh->areas[i] = SAMPLE_POLYAREA_GROUND;
			
			if (m_pmesh->areas[i] == SAMPLE_POLYAREA_GROUND ||
				m_pmesh->areas[i] == SAMPLE_POLYAREA_GRASS ||
				m_pmesh->areas[i] == SAMPLE_POLYAREA_ROAD)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK;
			}
			else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_WATER)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_SWIM;
			}
			else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_DOOR)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK | SAMPLE_POLYFLAGS_DOOR;
			}
		}
		
		dtNavMeshCreateParams params;
		memset(&params, 0, sizeof(params));
		params.verts = m_pmesh->verts;
		params.vertCount = m_pmesh->nverts;
		params.polys = m_pmesh->polys;
		params.polyAreas = m_pmesh->areas;
		params.polyFlags = m_pmesh->flags;
		params.polyCount = m_pmesh->npolys;
		params.nvp = m_pmesh->nvp;
		params.detailMeshes = m_dmesh->meshes;
		params.detailVerts = m_dmesh->verts;
		params.detailVertsCount = m_dmesh->nverts;
		params.detailTris = m_dmesh->tris;
		params.detailTriCount = m_dmesh->ntris;
		params.offMeshConVerts = m_geom->getOffMeshConnectionVerts();
		params.offMeshConRad = m_geom->getOffMeshConnectionRads();
		params.offMeshConDir = m_geom->getOffMeshConnectionDirs();
		params.offMeshConAreas = m_geom->getOffMeshConnectionAreas();
		params.offMeshConFlags = m_geom->getOffMeshConnectionFlags();
		params.offMeshConUserID = m_geom->getOffMeshConnectionId();
		params.offMeshConCount = m_geom->getOffMeshConnectionCount();
		params.walkableHeight = m_agentHeight;
		params.walkableRadius = m_agentRadius;
		params.walkableClimb = m_agentMaxClimb;
		params.tileX = tx;
		params.tileY = ty;
		params.tileLayer = 0;
		rcVcopy(params.bmin, m_pmesh->bmin);
		rcVcopy(params.bmax, m_pmesh->bmax);
		params.cs = m_cfg.cs;
		params.ch = m_cfg.ch;
		params.buildBvTree = true;
		
		if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
		{
			m_ctx->log(RC_LOG_ERROR, "Could not build Detour navmesh.");
			return 0;
		}		
	}
	m_tileMemUsage = navDataSize/1024.0f;
	
	m_ctx->stopTimer(RC_TIMER_TOTAL);
	
	// Show performance stats.
	duLogBuildTimes(*m_ctx, m_ctx->getAccumulatedTime(RC_TIMER_TOTAL));
	m_ctx->log(RC_LOG_PROGRESS, ">> Polymesh: %d vertices  %d polygons", m_pmesh->nverts, m_pmesh->npolys);
	
	m_tileBuildTime = m_ctx->getAccumulatedTime(RC_TIMER_TOTAL)/1000.0f;

	dataSize = navDataSize;
	return navData;
}
コード例 #9
0
bool NavMeshGenerator::handleBuild(const Array2D<int>& tab)
{

	cleanup();
	
	//
	// Step 1. Initialize build config.
	//
	
	// Init build configuration from GUI
	memset(&m_cfg, 0, sizeof(m_cfg));

	const int voxels_per_tile = 3; //3
	
	m_cfg.width = tab.size().x*3*voxels_per_tile;
	m_cfg.height = tab.size().x*3*voxels_per_tile;

	m_cfg.cs = pixels_per_tile/float(voxels_per_tile);
	m_cfg.walkableRadius = voxels_per_tile == 1 ? 0 : 1;
	m_cfg.maxEdgeLen = 0;//20; // 
	m_cfg.maxSimplificationError = 0.f; // 0 or 1, no need because we are working on tiles
	m_cfg.minRegionArea = 64;//(int)rcSqr(m_regionMinSize);		// Note: area = size*size
	m_cfg.mergeRegionArea = 10000;//(int)rcSqr(m_regionMergeSize);	// Note: area = size*size
	m_cfg.maxVertsPerPoly = 4;//(int)m_vertsPerPoly;

	
	m_cfg.ch = 0.2f; // < height info, not used
	m_cfg.detailSampleDist = 20.f; // < height info, not used
	m_cfg.detailSampleMaxError = 0.2f; // < height info, not used
	m_cfg.walkableSlopeAngle = 0; // < height info, not used
	m_cfg.walkableHeight = 0; // < height info, not used
	m_cfg.walkableClimb = 0; // < height info, not used
	 

	// Set the area where the navigation will be build.
	m_cfg.bmin[0] = 0;
	m_cfg.bmin[1] = 0;
	m_cfg.bmin[2] = 0;

	m_cfg.bmax[0] = tab.size().x*3*pixels_per_tile;
	m_cfg.bmax[1] = 3;
	m_cfg.bmax[2] = tab.size().y*3*pixels_per_tile;


	// Reset build times gathering.
	m_ctx->resetTimers();

	// Start the build process.	
	m_ctx->startTimer(RC_TIMER_TOTAL);
	
	m_ctx->log(RC_LOG_PROGRESS, "Building navigation:");
	m_ctx->log(RC_LOG_PROGRESS, " - %d x %d cells", m_cfg.width, m_cfg.height);
	
	//
	// Step 2. Create Heightfield
	//
	
	// Allocate voxel heightfield
	m_solid = rcAllocHeightfield();
	if (!m_solid)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'solid'.");
		return false;
	}
	if (!rcCreateHeightfield(m_ctx, *m_solid, m_cfg.width, m_cfg.height, m_cfg.bmin, m_cfg.bmax, m_cfg.cs, m_cfg.ch))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create solid heightfield.");
		return false;
	}
	

	for(int i = 0; i < m_solid->width; ++i) {
		for(int j = 0; j < m_solid->height; ++j) {
			bool colide = tab(int(i*tab.size().x/m_solid->width)  , int(j*tab.size().y/m_solid->height)) != 0 ;
			rcAddSpan(NULL, 
				*m_solid, i, j, 0, 
				colide ? 10: 0, colide ? RC_NULL_AREA : RC_WALKABLE_AREA, 1);
		}
	}
	
	//
	// Step 3. Filter walkables surfaces.
	//----> Not done for 2D


	//
	// Step 4. Partition walkable surface to simple regions.
	//

	// Compact the heightfield so that it is faster to handle from now on.
	// This will result more cache coherent data as well as the neighbours
	// between walkable cells will be calculated.
	m_chf = rcAllocCompactHeightfield();
	if (!m_chf)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'chf'.");
		return false;
	}
	if (!rcBuildCompactHeightfield(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid, *m_chf))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build compact data.");
		return false;
	}
	
	if (!m_keepInterResults)
	{
		rcFreeHeightField(m_solid);
		m_solid = 0;
	}
		
	// Erode the walkable area by agent radius.
	if (!rcErodeWalkableArea(m_ctx, m_cfg.walkableRadius, *m_chf))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not erode.");
		return false;
	}

	// (Optional) Mark areas.
	/*const ConvexVolume* vols = m_geom->getConvexVolumes();
	for (int i  = 0; i < m_geom->getConvexVolumeCount(); ++i)
	rcMarkConvexPolyArea(m_ctx, vols[i].verts, vols[i].nverts, vols[i].hmin, vols[i].hmax, (unsigned char)vols[i].area, *m_chf);
	*/
	
	// Partition the heightfield so that we can use simple algorithm later to triangulate the walkable areas.
	// There are 3 martitioning methods, each with some pros and cons:
	// 1) Watershed partitioning
	//   - the classic Recast partitioning
	//   - creates the nicest tessellation
	//   - usually slowest
	//   - partitions the heightfield into nice regions without holes or overlaps
	//   - the are some corner cases where this method creates produces holes and overlaps
	//      - holes may appear when a small obstacles is close to large open area (triangulation can handle this)
	//      - overlaps may occur if you have narrow spiral corridors (i.e stairs), this make triangulation to fail
	//   * generally the best choice if you precompute the nacmesh, use this if you have large open areas
	// 2) Monotone partioning
	//   - fastest
	//   - partitions the heightfield into regions without holes and overlaps (guaranteed)
	//   - creates long thin polygons, which sometimes causes paths with detours
	//   * use this if you want fast navmesh generation
	// 3) Layer partitoining
	//   - quite fast
	//   - partitions the heighfield into non-overlapping regions
	//   - relies on the triangulation code to cope with holes (thus slower than monotone partitioning)
	//   - produces better triangles than monotone partitioning
	//   - does not have the corner cases of watershed partitioning
	//   - can be slow and create a bit ugly tessellation (still better than monotone)
	//     if you have large open areas with small obstacles (not a problem if you use tiles)
	//   * good choice to use for tiled navmesh with medium and small sized tiles
	
	if (true) //m_partitionType == SAMPLE_PARTITION_WATERSHED)
	{
		// Prepare for region partitioning, by calculating distance field along the walkable surface.
		if (!rcBuildDistanceField(m_ctx, *m_chf))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build distance field.");
			return false;
		}
		
		// Partition the walkable surface into simple regions without holes.
		if (!rcBuildRegions(m_ctx, *m_chf, 0, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build watershed regions.");
			return false;
		}
	}
	else if (false)//m_partitionType == SAMPLE_PARTITION_MONOTONE)
	{
		// Partition the walkable surface into simple regions without holes.
		// Monotone partitioning does not need distancefield.
		if (!rcBuildRegionsMonotone(m_ctx, *m_chf, 0, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build monotone regions.");
			return false;
		}
	}
	else // SAMPLE_PARTITION_LAYERS
	{
		// Partition the walkable surface into simple regions without holes.
		if (!rcBuildLayerRegions(m_ctx, *m_chf, 0, m_cfg.minRegionArea))
		{
			m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build layer regions.");
			return false;
		}
	}
	
	//
	// Step 5. Trace and simplify region contours.
	//
	
	// Create contours.
	m_cset = rcAllocContourSet();
	if (!m_cset)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'cset'.");
		return false;
	}
	if (!rcBuildContours(m_ctx, *m_chf, m_cfg.maxSimplificationError, m_cfg.maxEdgeLen, *m_cset))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create contours.");
		return false;
	}
	
	//
	// Step 6. Build polygons mesh from contours.
	//
	
	// Build polygon navmesh from the contours.
	m_pmesh = rcAllocPolyMesh();
	if (!m_pmesh)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'pmesh'.");
		return false;
	}
	if (!rcBuildPolyMesh(m_ctx, *m_cset, m_cfg.maxVertsPerPoly, *m_pmesh))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not triangulate contours.");
		return false;
	}
	
	//
	// Step 7. Create detail mesh which allows to access approximate height on each polygon.
	//
	
	m_dmesh = rcAllocPolyMeshDetail();
	if (!m_dmesh)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'pmdtl'.");
		return false;
	}

	if (!rcBuildPolyMeshDetail(m_ctx, *m_pmesh, *m_chf, m_cfg.detailSampleDist, m_cfg.detailSampleMaxError, *m_dmesh))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build detail mesh.");
		return false;
	}

	if (!m_keepInterResults)
	{
		rcFreeCompactHeightfield(m_chf);
		m_chf = 0;
		rcFreeContourSet(m_cset);
		m_cset = 0;
	}

	// At this point the navigation mesh data is ready, you can access it from m_pmesh.
	// See duDebugDrawPolyMesh or dtCreateNavMeshData as examples how to access the data.
	
	//
	// (Optional) Step 8. Create Detour data from Recast poly mesh.
	//
	
	// The GUI may allow more max points per polygon than Detour can handle.
	// Only build the detour navmesh if we do not exceed the limit.
	if (m_cfg.maxVertsPerPoly <= DT_VERTS_PER_POLYGON)
	{
		unsigned char* navData = 0;
		int navDataSize = 0;

		// Update poly flags from areas.
		for (int i = 0; i < m_pmesh->npolys; ++i)
		{
			//if (m_pmesh->areas[i] == RC_WALKABLE_AREA)
			//	m_pmesh->areas[i] = SAMPLE_POLYAREA_GROUND;
				
			if (m_pmesh->areas[i] == RC_WALKABLE_AREA)
			{
				m_pmesh->flags[i] = 1;
			}
			else {
				m_pmesh->flags[i] = 0;
			}
		}
		

		dtNavMeshCreateParams params;
		memset(&params, 0, sizeof(params));
		params.verts = m_pmesh->verts;
		params.vertCount = m_pmesh->nverts;
		params.polys = m_pmesh->polys;
		params.polyAreas = m_pmesh->areas;
		params.polyFlags = m_pmesh->flags;
		params.polyCount = m_pmesh->npolys;
		params.nvp = m_pmesh->nvp;
		params.detailMeshes = m_dmesh->meshes;
		params.detailVerts = m_dmesh->verts;
		params.detailVertsCount = m_dmesh->nverts;
		params.detailTris = m_dmesh->tris;
		params.detailTriCount = m_dmesh->ntris;
		params.offMeshConCount = 0;
		/*
		unused since offMeshConCount is null
		params.offMeshConVerts = m_geom->getOffMeshConnectionVerts();
		params.offMeshConRad = m_geom->getOffMeshConnectionRads();
		params.offMeshConDir = m_geom->getOffMeshConnectionDirs();
		params.offMeshConAreas = m_geom->getOffMeshConnectionAreas();
		params.offMeshConFlags = m_geom->getOffMeshConnectionFlags();
		params.offMeshConUserID = m_geom->getOffMeshConnectionId();
		*/
		params.walkableHeight = m_agentHeight;
		params.walkableRadius = m_agentRadius;
		params.walkableClimb = m_agentMaxClimb;
		rcVcopy(params.bmin, m_pmesh->bmin);
		rcVcopy(params.bmax, m_pmesh->bmax);
		params.cs = m_cfg.cs;
		params.ch = m_cfg.ch;
		params.buildBvTree = true;
		
		if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
		{
			m_ctx->log(RC_LOG_ERROR, "Could not build Detour navmesh.");
			return false;
		}
		
		m_navMesh = dtAllocNavMesh();
		if (!m_navMesh)
		{
			dtFree(navData);
			m_ctx->log(RC_LOG_ERROR, "Could not create Detour navmesh");
			return false;
		}
		
		dtStatus status;
		
		status = m_navMesh->init(navData, navDataSize, DT_TILE_FREE_DATA);
		if (dtStatusFailed(status))
		{
			dtFree(navData);
			m_ctx->log(RC_LOG_ERROR, "Could not init Detour navmesh");
			return false;
		}
		
		status = m_navQuery->init(m_navMesh, 2048);
		if (dtStatusFailed(status))
		{
			m_ctx->log(RC_LOG_ERROR, "Could not init Detour navmesh query");
			return false;
		}
	}
	
	m_ctx->stopTimer(RC_TIMER_TOTAL);

	// Show performance stats.

	m_ctx->log(RC_LOG_PROGRESS, ">> Polymesh: %d vertices  %d polygons", m_pmesh->nverts, m_pmesh->npolys);
	


	return true;
}
コード例 #10
0
ファイル: OgreRecast.cpp プロジェクト: arrian/3d-engine
bool OgreRecast::NavMeshBuild(InputGeom* input)
{
    // TODO: clean up unused variables


   m_pLog->logMessage("NavMeshBuild Start");


   //
   // Step 1. Initialize build config.
   //

   // Reset build times gathering.
   m_ctx->resetTimers();

   // Start the build process.
   m_ctx->startTimer(RC_TIMER_TOTAL);






   //
   // Step 2. Rasterize input polygon soup.
   //

   InputGeom *inputGeom = input;
   rcVcopy(m_cfg.bmin, inputGeom->getMeshBoundsMin());
   rcVcopy(m_cfg.bmax, inputGeom->getMeshBoundsMax());
   rcCalcGridSize(m_cfg.bmin, m_cfg.bmax, m_cfg.cs, &m_cfg.width, &m_cfg.height);

   int nverts = inputGeom->getVertCount();
   int ntris = inputGeom->getTriCount();
   Ogre::Vector3 min; FloatAToOgreVect3(inputGeom->getMeshBoundsMin(), min);
   Ogre::Vector3 max; FloatAToOgreVect3(inputGeom->getMeshBoundsMax(), max);

   //Ogre::LogManager::getSingletonPtr()->logMessage("Bounds: "+Ogre::StringConverter::toString(min) + "   "+ Ogre::StringConverter::toString(max));


   m_pLog->logMessage("Building navigation:");
   m_pLog->logMessage(" - " + Ogre::StringConverter::toString(m_cfg.width) + " x " + Ogre::StringConverter::toString(m_cfg.height) + " cells");
   m_pLog->logMessage(" - " + Ogre::StringConverter::toString(nverts/1000.0f) + " K verts, " + Ogre::StringConverter::toString(ntris/1000.0f) + " K tris");

   // Allocate voxel heightfield where we rasterize our input data to.
   m_solid = rcAllocHeightfield();
   if (!m_solid)
   {
      m_pLog->logMessage("ERROR: buildNavigation: Out of memory 'solid'.");
      return false;
   }
   if (!rcCreateHeightfield(m_ctx, *m_solid, m_cfg.width, m_cfg.height, m_cfg.bmin, m_cfg.bmax, m_cfg.cs, m_cfg.ch))
   {
      m_pLog->logMessage("ERROR: buildNavigation: Could not create solid heightfield. Possibly it requires too much memory, try setting a higher cellSize and cellHeight value.");
      return false;
   }
   
   // Allocate array that can hold triangle area types.
   // If you have multiple meshes you need to process, allocate
   // an array which can hold the max number of triangles you need to process.
   m_triareas = new unsigned char[ntris];
   if (!m_triareas)
   {
       m_pLog->logMessage("ERROR: buildNavigation: Out of memory 'm_triareas' ("+Ogre::StringConverter::toString(ntris)+").");
      return false;
   }
   
   // Find triangles which are walkable based on their slope and rasterize them.
   // If your input data is multiple meshes, you can transform them here, calculate
   // the are type for each of the meshes and rasterize them.
   memset(m_triareas, 0, ntris*sizeof(unsigned char));
   rcMarkWalkableTriangles(m_ctx, m_cfg.walkableSlopeAngle, inputGeom->getVerts(), inputGeom->getVertCount(), inputGeom->getTris(), inputGeom->getTriCount(), m_triareas);
   rcRasterizeTriangles(m_ctx, inputGeom->getVerts(), inputGeom->getVertCount(), inputGeom->getTris(), m_triareas, inputGeom->getTriCount(), *m_solid, m_cfg.walkableClimb);

   if (!m_keepInterResults)
   {
      delete [] m_triareas;
      m_triareas = 0;
   }





   //
   // Step 3. Filter walkables surfaces.
   //
   
   // Once all geoemtry is rasterized, we do initial pass of filtering to
   // remove unwanted overhangs caused by the conservative rasterization
   // as well as filter spans where the character cannot possibly stand.
   rcFilterLowHangingWalkableObstacles(m_ctx, m_cfg.walkableClimb, *m_solid);
   rcFilterLedgeSpans(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid);
   rcFilterWalkableLowHeightSpans(m_ctx, m_cfg.walkableHeight, *m_solid);








   //
   // Step 4. Partition walkable surface to simple regions.
   //

   // Compact the heightfield so that it is faster to handle from now on.
   // This will result more cache coherent data as well as the neighbours
   // between walkable cells will be calculated.
   m_chf = rcAllocCompactHeightfield();
   if (!m_chf)
   {
      m_pLog->logMessage("ERROR: buildNavigation: Out of memory 'chf'.");
      return false;
   }
   if (!rcBuildCompactHeightfield(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid, *m_chf))
   {
      m_pLog->logMessage("ERROR: buildNavigation: Could not build compact data.");
      return false;
   }
   
   if (!m_keepInterResults)
   {
      rcFreeHeightField(m_solid);
      m_solid = 0;
   }


   // Erode the walkable area by agent radius.
   if (!rcErodeWalkableArea(m_ctx, m_cfg.walkableRadius, *m_chf))
   {
      m_pLog->logMessage("ERROR: buildNavigation: Could not erode walkable areas.");
      return false;
   }

// TODO implement
   // (Optional) Mark areas.
   //const ConvexVolume* vols = m_geom->getConvexVolumes();
   //for (int i  = 0; i < m_geom->getConvexVolumeCount(); ++i)
   //   rcMarkConvexPolyArea(m_ctx, vols[i].verts, vols[i].nverts, vols[i].hmin, vols[i].hmax, (unsigned char)vols[i].area, *m_chf);


   // Prepare for region partitioning, by calculating distance field along the walkable surface.
   if (!rcBuildDistanceField(m_ctx, *m_chf))
   {
      m_pLog->logMessage("ERROR: buildNavigation: Could not build distance field.");
      return false;
   }

   // Partition the walkable surface into simple regions without holes.
   if (!rcBuildRegions(m_ctx, *m_chf, m_cfg.borderSize, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
   {
      m_pLog->logMessage("ERROR: buildNavigation: Could not build regions.");
      return false;
   }








   //
   // Step 5. Trace and simplify region contours.
   //
   
   // Create contours.
   m_cset = rcAllocContourSet();
   if (!m_cset)
   {
      m_pLog->logMessage("ERROR: buildNavigation: Out of memory 'cset'.");
      return false;
   }
   if (!rcBuildContours(m_ctx, *m_chf, m_cfg.maxSimplificationError, m_cfg.maxEdgeLen, *m_cset))
   {
      m_pLog->logMessage("ERROR: buildNavigation: Could not create contours.");
      return false;
   }

   if (m_cset->nconts == 0)
   {
       // In case of errors see: http://groups.google.com/group/recastnavigation/browse_thread/thread/a6fbd509859a12c8
       // You should probably tweak the parameters
           m_pLog->logMessage("ERROR: No contours created (Recast)!");
    }





   //
   // Step 6. Build polygons mesh from contours.
   //
   
   // Build polygon navmesh from the contours.
   m_pmesh = rcAllocPolyMesh();
   if (!m_pmesh)
   {
      m_pLog->logMessage("ERROR: buildNavigation: Out of memory 'pmesh'.");
      return false;
   }
   if (!rcBuildPolyMesh(m_ctx, *m_cset, m_cfg.maxVertsPerPoly, *m_pmesh))
   {
       // Try modifying the parameters. I experienced this error when setting agentMaxClimb too high.
      m_pLog->logMessage("ERROR: buildNavigation: Could not triangulate contours.");
      return false;
   }
   








   //
   // Step 7. Create detail mesh which allows to access approximate height on each polygon.
   //
   
   m_dmesh = rcAllocPolyMeshDetail();
   if (!m_dmesh)
   {
      m_pLog->logMessage("ERROR: buildNavigation: Out of memory 'pmdtl'.");
      return false;
   }

   if (!rcBuildPolyMeshDetail(m_ctx, *m_pmesh, *m_chf, m_cfg.detailSampleDist, m_cfg.detailSampleMaxError, *m_dmesh))
   {
      m_pLog->logMessage("ERROR: buildNavigation: Could not build detail mesh.");
      return false;
   }

   if (!m_keepInterResults)
   {
      rcFreeCompactHeightfield(m_chf);
      m_chf = 0;
      rcFreeContourSet(m_cset);
      m_cset = 0;
   }

   // At this point the navigation mesh data is ready, you can access it from m_pmesh.
   // See duDebugDrawPolyMesh or dtCreateNavMeshData as examples how to access the data.
   







   //
   // (Optional) Step 8. Create Detour data from Recast poly mesh.
   //
   
   // The GUI may allow more max points per polygon than Detour can handle.
   // Only build the detour navmesh if we do not exceed the limit.


   if (m_cfg.maxVertsPerPoly <= DT_VERTS_PER_POLYGON)
   {
      m_pLog->logMessage("Detour 1000");

      unsigned char* navData = 0;
      int navDataSize = 0;

      
      // Update poly flags from areas.
      for (int i = 0; i < m_pmesh->npolys; ++i)
      {
         if (m_pmesh->areas[i] == RC_WALKABLE_AREA)
         {
            m_pmesh->areas[i] = SAMPLE_POLYAREA_GROUND;
            m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK;
         }
      }
      

      // Set navmesh params
      dtNavMeshCreateParams params;
      memset(&params, 0, sizeof(params));
      params.verts = m_pmesh->verts;
      params.vertCount = m_pmesh->nverts;
      params.polys = m_pmesh->polys;
      params.polyAreas = m_pmesh->areas;
      params.polyFlags = m_pmesh->flags;
      params.polyCount = m_pmesh->npolys;
      params.nvp = m_pmesh->nvp;
      params.detailMeshes = m_dmesh->meshes;
      params.detailVerts = m_dmesh->verts;
      params.detailVertsCount = m_dmesh->nverts;
      params.detailTris = m_dmesh->tris;
      params.detailTriCount = m_dmesh->ntris;

      // no off mesh connections yet
      m_offMeshConCount=0 ;
      params.offMeshConVerts = m_offMeshConVerts ;
      params.offMeshConRad = m_offMeshConRads ;
      params.offMeshConDir = m_offMeshConDirs ;
      params.offMeshConAreas = m_offMeshConAreas ;
      params.offMeshConFlags = m_offMeshConFlags ;
      params.offMeshConUserID = m_offMeshConId ;
      params.offMeshConCount = m_offMeshConCount ;

      params.walkableHeight = m_agentHeight;
      params.walkableRadius = m_agentRadius;
      params.walkableClimb = m_agentMaxClimb;
      rcVcopy(params.bmin, m_pmesh->bmin);
      rcVcopy(params.bmax, m_pmesh->bmax);
      params.cs = m_cfg.cs;
      params.ch = m_cfg.ch;

      
      m_pLog->logMessage("Detour 2000");

      if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
      {
         m_pLog->logMessage("ERROR: Could not build Detour navmesh.");
         return false;
      }

      m_pLog->logMessage("Detour 3000");
      
      m_navMesh = dtAllocNavMesh();
      if (!m_navMesh)
      {
         dtFree(navData);
         m_pLog->logMessage("ERROR: Could not create Detour navmesh");
         return false;
      }

      m_pLog->logMessage("Detour 4000");
      
      dtStatus status;
      
      status = m_navMesh->init(navData, navDataSize, DT_TILE_FREE_DATA);
      if (dtStatusFailed(status))
      {
         dtFree(navData);
         m_pLog->logMessage("ERROR: Could not init Detour navmesh");
         return false;
      }

      m_pLog->logMessage("Detour 5000");
      
      m_navQuery = dtAllocNavMeshQuery();
      status = m_navQuery->init(m_navMesh, 2048);

      m_pLog->logMessage("Detour 5500");

      if (dtStatusFailed(status))
      {
         m_pLog->logMessage("ERROR: Could not init Detour navmesh query");
         return false;
      }

      m_pLog->logMessage("Detour 6000");
   }
   
   m_ctx->stopTimer(RC_TIMER_TOTAL);

   
   ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


   // cleanup stuff we don't need
//   delete [] rc_verts ;
//   delete [] rc_tris ;
//   delete [] rc_trinorms ;

   //CreateRecastPolyMesh(*m_pmesh) ;   // Debug render it

   m_pLog->logMessage("NavMeshBuild End");
   return true;
}
コード例 #11
0
ファイル: gkRecast.cpp プロジェクト: Ali-il/gamekit
PDT_NAV_MESH gkRecast::createNavMesh(PMESHDATA meshData, const Config& config)
{
	if (!meshData.get())
		return PDT_NAV_MESH(0);

	rcConfig cfg;

	cfg.cs = config.CELL_SIZE;
	cfg.ch = config.CELL_HEIGHT;

	GK_ASSERT(cfg.ch && "cfg.ch cannot be zero");
	GK_ASSERT(cfg.ch && "cfg.ch cannot be zero");

	cfg.walkableSlopeAngle = config.AGENT_MAX_SLOPE;
	cfg.walkableHeight = (int)ceilf(config.AGENT_HEIGHT / cfg.ch);
	cfg.walkableClimb = (int)ceilf(config.AGENT_MAX_CLIMB / cfg.ch);
	cfg.walkableRadius = (int)ceilf(config.AGENT_RADIUS / cfg.cs);
	cfg.maxEdgeLen = (int)(config.EDGE_MAX_LEN / cfg.cs);
	cfg.maxSimplificationError = config.EDGE_MAX_ERROR;
	cfg.minRegionSize = (int)rcSqr(config.REGION_MIN_SIZE);
	cfg.mergeRegionSize = (int)rcSqr(config.REGION_MERGE_SIZE);
	cfg.maxVertsPerPoly = gkMin(config.VERTS_PER_POLY, DT_VERTS_PER_POLYGON);
	cfg.tileSize = config.TILE_SIZE;
	cfg.borderSize = cfg.walkableRadius + 4; // Reserve enough padding.
	cfg.detailSampleDist = config.DETAIL_SAMPLE_DIST < 0.9f ? 0 : cfg.cs * config.DETAIL_SAMPLE_DIST;
	cfg.detailSampleMaxError = cfg.ch * config.DETAIL_SAMPLE_ERROR;

	if (!meshData->getVertCount())
		return PDT_NAV_MESH(0);

	gkScalar bmin[3], bmax[3];

	const gkScalar* verts = meshData->getVerts();
	int nverts = meshData->getVertCount();
	const int* tris = meshData->getTris();
	const gkScalar* trinorms = meshData->getNormals();
	int ntris = meshData->getTriCount();

	rcCalcBounds(verts, nverts, bmin, bmax);

	//
	// Step 1. Initialize build config.
	//

	// Set the area where the navigation will be build.
	// Here the bounds of the input mesh are used, but the
	// area could be specified by an user defined box, etc.
	rcVcopy(cfg.bmin, bmin);
	rcVcopy(cfg.bmax, bmax);
	rcCalcGridSize(cfg.bmin, cfg.bmax, cfg.cs, &cfg.width, &cfg.height);

	rcBuildTimes m_buildTimes;
	// Reset build times gathering.
	memset(&m_buildTimes, 0, sizeof(m_buildTimes));
	rcSetBuildTimes(&m_buildTimes);

	// Start the build process.
	rcTimeVal totStartTime = rcGetPerformanceTimer();

	//gkPrintf("Building navigation:");
	//gkPrintf(" - %d x %d cells", cfg.width, cfg.height);
	//gkPrintf(" - %.1fK verts, %.1fK tris", nverts/1000.0f, ntris/1000.0f);

	//
	// Step 2. Rasterize input polygon soup.
	//

	// Allocate voxel heighfield where we rasterize our input data to.
	rcHeightfield heightField;

	if (!rcCreateHeightfield(heightField, cfg.width, cfg.height, cfg.bmin, cfg.bmax, cfg.cs, cfg.ch))
	{
		gkPrintf("buildNavigation: Could not create solid heightfield.");
		return PDT_NAV_MESH(0);
	}

	{
		// Allocate array that can hold triangle flags.
		// If you have multiple meshes you need to process, allocate
		// and array which can hold the max number of triangles you need to process.

		utArray<unsigned char> triflags;
		triflags.resize(ntris);

		// Find triangles which are walkable based on their slope and rasterize them.
		// If your input data is multiple meshes, you can transform them here, calculate
		// the flags for each of the meshes and rasterize them.
		memset(triflags.ptr(), 0, ntris * sizeof(unsigned char));
		rcMarkWalkableTriangles(cfg.walkableSlopeAngle, verts, nverts, tris, ntris, triflags.ptr());
		rcRasterizeTriangles(verts, nverts, tris, triflags.ptr(), ntris, heightField);
	}

	//
	// Step 3. Filter walkables surfaces.
	//

	// Once all geoemtry is rasterized, we do initial pass of filtering to
	// remove unwanted overhangs caused by the conservative rasterization
	// as well as filter spans where the character cannot possibly stand.
	rcFilterLedgeSpans(cfg.walkableHeight, cfg.walkableClimb, heightField);
	rcFilterWalkableLowHeightSpans(cfg.walkableHeight, heightField);

	//
	// Step 4. Partition walkable surface to simple regions.
	//

	// Compact the heightfield so that it is faster to handle from now on.
	// This will result more cache coherent data as well as the neighbours
	// between walkable cells will be calculated.
	rcCompactHeightfield chf;
	if (!rcBuildCompactHeightfield(cfg.walkableHeight, cfg.walkableClimb, RC_WALKABLE, heightField, chf))
	{
		gkPrintf("buildNavigation: Could not build compact data.");
		return PDT_NAV_MESH(0);
	}

	// Erode the walkable area by agent radius.
	if (!rcErodeArea(RC_WALKABLE_AREA, cfg.walkableRadius, chf))
	{
		gkPrintf("buildNavigation: Could not erode.");
		return PDT_NAV_MESH(0);
	}

	//
	// Mark areas from objects
	//

	gkScene* scene = gkEngine::getSingleton().getActiveScene();
	gkGameObjectSet& objects = scene->getInstancedObjects();
	gkGameObjectSet::Iterator it = objects.iterator();
	while (it.hasMoreElements())
	{
		gkGameObject* obj = it.getNext();

		if (!obj->getNavData().isEmpty())
		{
			size_t tBaseIndex = obj->getNavData().triangleBaseIndex;
			size_t vBaseIndex = tBaseIndex / 2;

			const float* v = verts + vBaseIndex;
			const int nVerts = obj->getNavData().nIndex / 3;

			const gkGameObjectProperties& prop = obj->getProperties();

			rcMarkConvexPolyArea(v, nVerts, obj->getNavData().hmin, obj->getNavData().hmax, prop.m_findPathFlag, chf);
		}
	}

	// Prepare for region partitioning, by calculating distance field along the walkable surface.
	if (!rcBuildDistanceField(chf))
	{
		gkPrintf("buildNavigation: Could not build distance field.");
		return PDT_NAV_MESH(0);
	}

	// Partition the walkable surface into simple regions without holes.
	if (!rcBuildRegions(chf, cfg.borderSize, cfg.minRegionSize, cfg.mergeRegionSize))
	{
		gkPrintf("buildNavigation: Could not build regions.");
		return PDT_NAV_MESH(0);
	}


	//
	// Step 5. Trace and simplify region contours.
	//

	// Create contours.
	rcContourSet cset;

	if (!rcBuildContours(chf, cfg.maxSimplificationError, cfg.maxEdgeLen, cset))
	{
		gkPrintf("buildNavigation: Could not create contours.");
		return PDT_NAV_MESH(0);
	}


	//
	// Step 6. Build polygons mesh from contours.
	//

	// Build polygon navmesh from the contours.
	rcPolyMesh pmesh;
	if (!rcBuildPolyMesh(cset, cfg.maxVertsPerPoly, pmesh))
	{
		gkPrintf("buildNavigation: Could not triangulate contours.");
		return PDT_NAV_MESH(0);
	}


	//
	// Step 7. Create detail mesh which allows to access approximate height on each polygon.
	//

	rcPolyMeshDetail dmesh;

	if (!rcBuildPolyMeshDetail(pmesh, chf, cfg.detailSampleDist, cfg.detailSampleMaxError, dmesh))
	{
		gkPrintf("buildNavigation: Could not build detail mesh.");
		return PDT_NAV_MESH(0);
	}

	// At this point the navigation mesh data is ready, you can access it from pmesh.
	// See rcDebugDrawPolyMesh or dtCreateNavMeshData as examples how to access the data.

	//
	// Step 8. Create Detour data from Recast poly mesh.
	//

	PDT_NAV_MESH navMesh;

	// Update poly flags from areas.
	for (int i = 0; i < pmesh.npolys; ++i)
		pmesh.flags[i] = 0xFFFF & pmesh.areas[i];

	dtNavMeshCreateParams params;
	memset(&params, 0, sizeof(params));
	params.verts = pmesh.verts;
	params.vertCount = pmesh.nverts;
	params.polys = pmesh.polys;
	params.polyAreas = pmesh.areas;
	params.polyFlags = pmesh.flags;
	params.polyCount = pmesh.npolys;
	params.nvp = pmesh.nvp;
	params.detailMeshes = dmesh.meshes;
	params.detailVerts = dmesh.verts;
	params.detailVertsCount = dmesh.nverts;
	params.detailTris = dmesh.tris;
	params.detailTriCount = dmesh.ntris;
	/*        params.offMeshConVerts = m_geom->getOffMeshConnectionVerts();
	    params.offMeshConRad = m_geom->getOffMeshConnectionRads();
	    params.offMeshConDir = m_geom->getOffMeshConnectionDirs();
	    params.offMeshConAreas = m_geom->getOffMeshConnectionAreas();
	    params.offMeshConFlags = m_geom->getOffMeshConnectionFlags();
	    params.offMeshConCount = m_geom->getOffMeshConnectionCount();
	    */
	params.walkableHeight = cfg.walkableHeight * cfg.ch;
	params.walkableRadius = cfg.walkableRadius * cfg.cs;;
	params.walkableClimb = cfg.walkableClimb * cfg.ch;
	rcVcopy(params.bmin, pmesh.bmin);
	rcVcopy(params.bmax, pmesh.bmax);
	params.cs = cfg.cs;
	params.ch = cfg.ch;

	unsigned char* navData = 0;
	int navDataSize = 0;

	if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
	{
		gkPrintf("Could not build Detour navmesh.");
		return PDT_NAV_MESH(0);
	}

	navMesh = PDT_NAV_MESH(new gkDetourNavMesh(new dtNavMesh));

	if (!navMesh->m_p->init(navData, navDataSize, DT_TILE_FREE_DATA, 2048))
	{
		delete [] navData;
		gkPrintf("Could not init Detour navmesh");
		return PDT_NAV_MESH(0);
	}

	rcTimeVal totEndTime = rcGetPerformanceTimer();

	gkPrintf("Navigation mesh created: %.1fms", rcGetDeltaTimeUsec(totStartTime, totEndTime) / 1000.0f);

	return navMesh;
}
コード例 #12
0
ファイル: WCellRecast.cpp プロジェクト: Bootz/WCell
unsigned char* buildTileMesh(const int tx, const int ty, 
	const float* bmin, const float* bmax, int& dataSize,
	InputGeom* geom,
	rcConfig cfg,
	rcContext* ctx)
{
	const float* verts = geom->getMesh()->getVerts();
	const int nverts = geom->getMesh()->getVertCount();
	const int ntris = geom->getMesh()->getTriCount();
	const rcChunkyTriMesh* chunkyMesh = geom->getChunkyMesh();

	rcVcopy(cfg.bmin, bmin);
	rcVcopy(cfg.bmax, bmax);
	cfg.bmin[0] -= cfg.borderSize*cfg.cs;
	cfg.bmin[2] -= cfg.borderSize*cfg.cs;
	cfg.bmax[0] += cfg.borderSize*cfg.cs;
	cfg.bmax[2] += cfg.borderSize*cfg.cs;
	
	// Reset build times gathering.
	ctx->resetTimers();
	
	// Start the build process.
	ctx->startTimer(RC_TIMER_TOTAL);
	
	ctx->log(RC_LOG_PROGRESS, "Building navigation:");
	ctx->log(RC_LOG_PROGRESS, " - %d x %d cells", cfg.width, cfg.height);
	ctx->log(RC_LOG_PROGRESS, " - %.1fK verts, %.1fK tris", nverts/1000.0f, ntris/1000.0f);
	
	// all involved objects
	rcHeightfield* m_solid = 0;
	unsigned char* m_triareas = 0;
	rcCompactHeightfield* m_chf = 0;
	rcContourSet* m_cset = 0;
	rcPolyMesh* m_pmesh = 0;
	rcPolyMeshDetail* m_dmesh = 0;

	
	// Allocate voxel heightfield where we rasterize our input data to.
	m_solid = rcAllocHeightfield();
	if (!m_solid)
	{
		ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'solid'.");
		return 0;
	}
	if (!rcCreateHeightfield(ctx, *m_solid, cfg.width, cfg.height, cfg.bmin, cfg.bmax, cfg.cs, cfg.ch))
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create solid heightfield.");
		return 0;
	}
	
	// Allocate array that can hold triangle flags.
	// If you have multiple meshes you need to process, allocate
	// and array which can hold the max number of triangles you need to process.
	m_triareas = new unsigned char[chunkyMesh->maxTrisPerChunk];
	if (!m_triareas)
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'm_triareas' (%d).", chunkyMesh->maxTrisPerChunk);
		return 0;
	}
	
	float tbmin[2], tbmax[2];
	tbmin[0] = cfg.bmin[0];
	tbmin[1] = cfg.bmin[2];
	tbmax[0] = cfg.bmax[0];
	tbmax[1] = cfg.bmax[2];
	int cid[512];// TODO: Make grow when returning too many items.
	const int ncid = rcGetChunksOverlappingRect(chunkyMesh, tbmin, tbmax, cid, 512);
	if (!ncid) {
		CleanupAfterTileBuild();
		return 0;
	}
	
	int m_tileTriCount = 0;
	
	for (int i = 0; i < ncid; ++i)
	{
		const rcChunkyTriMeshNode& node = chunkyMesh->nodes[cid[i]];
		const int* tris = &chunkyMesh->tris[node.i*3];
		const int ntris = node.n;
		
		m_tileTriCount += ntris;
		
		memset(m_triareas, 0, ntris*sizeof(unsigned char));
		rcMarkWalkableTriangles(ctx, cfg.walkableSlopeAngle,
								verts, nverts, tris, ntris, m_triareas);
		
		rcRasterizeTriangles(ctx, verts, nverts, tris, m_triareas, ntris, *m_solid, cfg.walkableClimb);
	}
	
	// Once all geometry is rasterized, we do initial pass of filtering to
	// remove unwanted overhangs caused by the conservative rasterization
	// as well as filter spans where the character cannot possibly stand.

	// Domi edit: Do not filter any triangles
#ifndef DOMI_EDIT
	rcFilterLowHangingWalkableObstacles(ctx, cfg.walkableClimb, *m_solid);
	rcFilterLedgeSpans(ctx, cfg.walkableHeight, cfg.walkableClimb, *m_solid);
	rcFilterWalkableLowHeightSpans(ctx, cfg.walkableHeight, *m_solid);
#endif
	
	// Compact the heightfield so that it is faster to handle from now on.
	// This will result more cache coherent data as well as the neighbours
	// between walkable cells will be calculated.
	m_chf = rcAllocCompactHeightfield();
	if (!m_chf)
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'chf'.");
		return 0;
	}
	if (!rcBuildCompactHeightfield(ctx, cfg.walkableHeight, cfg.walkableClimb, *m_solid, *m_chf))
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build compact data.");
		return 0;
	}

	// Erode the walkable area by agent radius.
	if (!rcErodeWalkableArea(ctx, cfg.walkableRadius, *m_chf))
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Could not erode.");
		return 0;
	}

	// (Optional) Mark areas.
	const ConvexVolume* vols = geom->getConvexVolumes();
	for (int i  = 0; i < geom->getConvexVolumeCount(); ++i)
		rcMarkConvexPolyArea(ctx, vols[i].verts, vols[i].nverts, vols[i].hmin, vols[i].hmax, (unsigned char)vols[i].area, *m_chf);
	
	if (0)		// m_monotonePartitioning
	{
		// Partition the walkable surface into simple regions without holes.
		if (!rcBuildRegionsMonotone(ctx, *m_chf, cfg.borderSize, cfg.minRegionArea, cfg.mergeRegionArea))
		{
			CleanupAfterTileBuild();
			ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build regions.");
			return 0;
		}
	}
	else
	{
		// Prepare for region partitioning, by calculating distance field along the walkable surface.
		if (!rcBuildDistanceField(ctx, *m_chf))
		{
			CleanupAfterTileBuild();
			ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build distance field.");
			return 0;
		}
		
		// Partition the walkable surface into simple regions without holes.
		if (!rcBuildRegions(ctx, *m_chf, cfg.borderSize, cfg.minRegionArea, cfg.mergeRegionArea))
		{
			CleanupAfterTileBuild();
			ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build regions.");
			return 0;
		}
	}
 	
	// Create contours.
	m_cset = rcAllocContourSet();
	if (!m_cset)
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'cset'.");
		return 0;
	}
	if (!rcBuildContours(ctx, *m_chf, cfg.maxSimplificationError, cfg.maxEdgeLen, *m_cset))
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create contours.");
		return 0;
	}
	
	if (m_cset->nconts == 0)
	{
		CleanupAfterTileBuild();
		return 0;
	}
	
	// Build polygon navmesh from the contours.
	m_pmesh = rcAllocPolyMesh();
	if (!m_pmesh)
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'pmesh'.");
		return 0;
	}
	if (!rcBuildPolyMesh(ctx, *m_cset, cfg.maxVertsPerPoly, *m_pmesh))
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Could not triangulate contours.");
		return 0;
	}
	
	// Build detail mesh.
	m_dmesh = rcAllocPolyMeshDetail();
	if (!m_dmesh)
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'dmesh'.");
		return 0;
	}
	
	if (!rcBuildPolyMeshDetail(ctx, *m_pmesh, *m_chf,
							   cfg.detailSampleDist, cfg.detailSampleMaxError,
							   *m_dmesh))
	{
		CleanupAfterTileBuild();
		ctx->log(RC_LOG_ERROR, "buildNavigation: Could build polymesh detail.");
		return 0;
	}
	
	unsigned char* navData = 0;
	int navDataSize = 0;
	if (cfg.maxVertsPerPoly <= DT_VERTS_PER_POLYGON)
	{
		if (m_pmesh->nverts >= 0xffff)
		{
			CleanupAfterTileBuild();

			// The vertex indices are ushorts, and cannot point to more than 0xffff vertices.
			ctx->log(RC_LOG_ERROR, "Too many vertices per tile %d (max: %d).", m_pmesh->nverts, 0xffff);
			return 0;
		}
		
		// Update poly flags from areas.
		/*for (int i = 0; i < m_pmesh->npolys; ++i)
		{
			if (m_pmesh->areas[i] == RC_WALKABLE_AREA)
				m_pmesh->areas[i] = SAMPLE_POLYAREA_GROUND;
			
			if (m_pmesh->areas[i] == SAMPLE_POLYAREA_GROUND ||
				m_pmesh->areas[i] == SAMPLE_POLYAREA_GRASS ||
				m_pmesh->areas[i] == SAMPLE_POLYAREA_ROAD)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK;
			}
			else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_WATER)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_SWIM;
			}
			else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_DOOR)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK | SAMPLE_POLYFLAGS_DOOR;
			}
		}*/
		
		dtNavMeshCreateParams params;
		memset(&params, 0, sizeof(params));
		params.verts = m_pmesh->verts;
		params.vertCount = m_pmesh->nverts;
		params.polys = m_pmesh->polys;
		params.polyAreas = m_pmesh->areas;
		params.polyFlags = m_pmesh->flags;
		params.polyCount = m_pmesh->npolys;
		params.nvp = m_pmesh->nvp;
		params.detailMeshes = m_dmesh->meshes;
		params.detailVerts = m_dmesh->verts;
		params.detailVertsCount = m_dmesh->nverts;
		params.detailTris = m_dmesh->tris;
		params.detailTriCount = m_dmesh->ntris;
		params.offMeshConVerts = geom->getOffMeshConnectionVerts();
		params.offMeshConRad = geom->getOffMeshConnectionRads();
		params.offMeshConDir = geom->getOffMeshConnectionDirs();
		params.offMeshConAreas = geom->getOffMeshConnectionAreas();
		params.offMeshConFlags = geom->getOffMeshConnectionFlags();
		params.offMeshConUserID = geom->getOffMeshConnectionId();
		params.offMeshConCount = geom->getOffMeshConnectionCount();
		params.walkableHeight = (float)cfg.walkableHeight;
		params.walkableRadius = (float)cfg.walkableRadius;
		params.walkableClimb = (float)cfg.walkableClimb;
		params.tileX = tx;
		params.tileY = ty;
		params.tileLayer = 0;
		rcVcopy(params.bmin, m_pmesh->bmin);
		rcVcopy(params.bmax, m_pmesh->bmax);
		params.cs = cfg.cs;
		params.ch = cfg.ch;
		params.buildBvTree = true;
		
		if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
		{
			CleanupAfterTileBuild();
			ctx->log(RC_LOG_ERROR, "Could not build Detour navmesh.");
			return 0;
		}		
	}
	ctx->stopTimer(RC_TIMER_TOTAL);
	
	// Show performance stats.
	ctx->log(RC_LOG_PROGRESS, ">> Polymesh: %d vertices  %d polygons", m_pmesh->nverts, m_pmesh->npolys);

	dataSize = navDataSize;
	
	CleanupAfterTileBuild();
	return navData;
}
コード例 #13
0
bool NavigationMesh::BuildTile(Vector<NavigationGeometryInfo>& geometryList, int x, int z)
{
    PROFILE(BuildNavigationMeshTile);
    
    // Remove previous tile (if any)
    navMesh_->removeTile(navMesh_->getTileRefAt(x, z, 0), 0, 0);
    
    float tileEdgeLength = (float)tileSize_ * cellSize_;
    
    BoundingBox tileBoundingBox(Vector3(
        boundingBox_.min_.x_ + tileEdgeLength * (float)x,
        boundingBox_.min_.y_,
        boundingBox_.min_.z_ + tileEdgeLength * (float)z
    ),
    Vector3(
        boundingBox_.min_.x_ + tileEdgeLength * (float)(x + 1),
        boundingBox_.max_.y_,
        boundingBox_.min_.z_ + tileEdgeLength * (float)(z + 1)
    ));
    
    NavigationBuildData build;
    
    rcConfig cfg;
    memset(&cfg, 0, sizeof cfg);
    cfg.cs = cellSize_;
    cfg.ch = cellHeight_;
    cfg.walkableSlopeAngle = agentMaxSlope_;
    cfg.walkableHeight = (int)ceilf(agentHeight_ / cfg.ch);
    cfg.walkableClimb = (int)floorf(agentMaxClimb_ / cfg.ch);
    cfg.walkableRadius = (int)ceilf(agentRadius_ / cfg.cs);
    cfg.maxEdgeLen = (int)(edgeMaxLength_ / cellSize_);
    cfg.maxSimplificationError = edgeMaxError_;
    cfg.minRegionArea = (int)sqrtf(regionMinSize_);
    cfg.mergeRegionArea = (int)sqrtf(regionMergeSize_);
    cfg.maxVertsPerPoly = 6;
    cfg.tileSize = tileSize_;
    cfg.borderSize = cfg.walkableRadius + 3; // Add padding
    cfg.width = cfg.tileSize + cfg.borderSize * 2;
    cfg.height = cfg.tileSize + cfg.borderSize * 2;
    cfg.detailSampleDist = detailSampleDistance_ < 0.9f ? 0.0f : cellSize_ * detailSampleDistance_;
    cfg.detailSampleMaxError = cellHeight_ * detailSampleMaxError_;
    
    rcVcopy(cfg.bmin, &tileBoundingBox.min_.x_);
    rcVcopy(cfg.bmax, &tileBoundingBox.max_.x_);
    cfg.bmin[0] -= cfg.borderSize * cfg.cs;
    cfg.bmin[2] -= cfg.borderSize * cfg.cs;
    cfg.bmax[0] += cfg.borderSize * cfg.cs;
    cfg.bmax[2] += cfg.borderSize * cfg.cs;
    
    BoundingBox expandedBox(*reinterpret_cast<Vector3*>(cfg.bmin), *reinterpret_cast<Vector3*>(cfg.bmax));
    GetTileGeometry(build, geometryList, expandedBox);
    
    if (build.vertices_.Empty() || build.indices_.Empty())
        return true; // Nothing to do
    
    build.heightField_ = rcAllocHeightfield();
    if (!build.heightField_)
    {
        LOGERROR("Could not allocate heightfield");
        return false;
    }
    
    if (!rcCreateHeightfield(build.ctx_, *build.heightField_, cfg.width, cfg.height, cfg.bmin, cfg.bmax, cfg.cs,
        cfg.ch))
    {
        LOGERROR("Could not create heightfield");
        return false;
    }
    
    unsigned numTriangles = build.indices_.Size() / 3;
    SharedArrayPtr<unsigned char> triAreas(new unsigned char[numTriangles]);
    memset(triAreas.Get(), 0, numTriangles);
    
    rcMarkWalkableTriangles(build.ctx_, cfg.walkableSlopeAngle, &build.vertices_[0].x_, build.vertices_.Size(),
        &build.indices_[0], numTriangles, triAreas.Get());
    rcRasterizeTriangles(build.ctx_, &build.vertices_[0].x_, build.vertices_.Size(), &build.indices_[0],
        triAreas.Get(), numTriangles, *build.heightField_, cfg.walkableClimb);
    rcFilterLowHangingWalkableObstacles(build.ctx_, cfg.walkableClimb, *build.heightField_);
    rcFilterLedgeSpans(build.ctx_, cfg.walkableHeight, cfg.walkableClimb, *build.heightField_);
    rcFilterWalkableLowHeightSpans(build.ctx_, cfg.walkableHeight, *build.heightField_);
    
    build.compactHeightField_ = rcAllocCompactHeightfield();
    if (!build.compactHeightField_)
    {
        LOGERROR("Could not allocate create compact heightfield");
        return false;
    }
    if (!rcBuildCompactHeightfield(build.ctx_, cfg.walkableHeight, cfg.walkableClimb, *build.heightField_,
        *build.compactHeightField_))
    {
        LOGERROR("Could not build compact heightfield");
        return false;
    }
    if (!rcErodeWalkableArea(build.ctx_, cfg.walkableRadius, *build.compactHeightField_))
    {
        LOGERROR("Could not erode compact heightfield");
        return false;
    }
    if (!rcBuildDistanceField(build.ctx_, *build.compactHeightField_))
    {
        LOGERROR("Could not build distance field");
        return false;
    }
    if (!rcBuildRegions(build.ctx_, *build.compactHeightField_, cfg.borderSize, cfg.minRegionArea,
        cfg.mergeRegionArea))
    {
        LOGERROR("Could not build regions");
        return false;
    }
    
    build.contourSet_ = rcAllocContourSet();
    if (!build.contourSet_)
    {
        LOGERROR("Could not allocate contour set");
        return false;
    }
    if (!rcBuildContours(build.ctx_, *build.compactHeightField_, cfg.maxSimplificationError, cfg.maxEdgeLen,
        *build.contourSet_))
    {
        LOGERROR("Could not create contours");
        return false;
    }
    
    build.polyMesh_ = rcAllocPolyMesh();
    if (!build.polyMesh_)
    {
        LOGERROR("Could not allocate poly mesh");
        return false;
    }
    if (!rcBuildPolyMesh(build.ctx_, *build.contourSet_, cfg.maxVertsPerPoly, *build.polyMesh_))
    {
        LOGERROR("Could not triangulate contours");
        return false;
    }
    
    build.polyMeshDetail_ = rcAllocPolyMeshDetail();
    if (!build.polyMeshDetail_)
    {
        LOGERROR("Could not allocate detail mesh");
        return false;
    }
    if (!rcBuildPolyMeshDetail(build.ctx_, *build.polyMesh_, *build.compactHeightField_, cfg.detailSampleDist,
        cfg.detailSampleMaxError, *build.polyMeshDetail_))
    {
        LOGERROR("Could not build detail mesh");
        return false;
    }
    
    // Set polygon flags
    /// \todo Allow to define custom flags
    for (int i = 0; i < build.polyMesh_->npolys; ++i)
    {
        if (build.polyMesh_->areas[i] == RC_WALKABLE_AREA)
            build.polyMesh_->flags[i] = 0x1;
    }
    
    unsigned char* navData = 0;
    int navDataSize = 0;
    
    dtNavMeshCreateParams params;
    memset(&params, 0, sizeof params);
    params.verts = build.polyMesh_->verts;
    params.vertCount = build.polyMesh_->nverts;
    params.polys = build.polyMesh_->polys;
    params.polyAreas = build.polyMesh_->areas;
    params.polyFlags = build.polyMesh_->flags;
    params.polyCount = build.polyMesh_->npolys;
    params.nvp = build.polyMesh_->nvp;
    params.detailMeshes = build.polyMeshDetail_->meshes;
    params.detailVerts = build.polyMeshDetail_->verts;
    params.detailVertsCount = build.polyMeshDetail_->nverts;
    params.detailTris = build.polyMeshDetail_->tris;
    params.detailTriCount = build.polyMeshDetail_->ntris;
    params.walkableHeight = agentHeight_;
    params.walkableRadius = agentRadius_;
    params.walkableClimb = agentMaxClimb_;
    params.tileX = x;
    params.tileY = z;
    rcVcopy(params.bmin, build.polyMesh_->bmin);
    rcVcopy(params.bmax, build.polyMesh_->bmax);
    params.cs = cfg.cs;
    params.ch = cfg.ch;
    params.buildBvTree = true;
    
    // Add off-mesh connections if have them
    if (build.offMeshRadii_.Size())
    {
        params.offMeshConCount = build.offMeshRadii_.Size();
        params.offMeshConVerts = &build.offMeshVertices_[0].x_;
        params.offMeshConRad = &build.offMeshRadii_[0];
        params.offMeshConFlags = &build.offMeshFlags_[0];
        params.offMeshConAreas = &build.offMeshAreas_[0];
        params.offMeshConDir = &build.offMeshDir_[0];
    }
    
    if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
    {
        LOGERROR("Could not build navigation mesh tile data");
        return false;
    }
    
    if (dtStatusFailed(navMesh_->addTile(navData, navDataSize, DT_TILE_FREE_DATA, 0, 0)))
    {
        LOGERROR("Failed to add navigation mesh tile");
        dtFree(navData);
        return false;
    }
    
    return true;
}
コード例 #14
0
int recast_buildContours(struct recast_compactHeightfield *chf,
			const float maxError, const int maxEdgeLen, struct recast_contourSet *cset)
{
	INIT_SCTX();
	return rcBuildContours(sctx, *(rcCompactHeightfield *) chf, maxError, maxEdgeLen, *(rcContourSet *) cset);
}
コード例 #15
0
/*!
	Build a NAVIGATION mesh from an OBJ mesh index. Usually this OBJMESH is either a collision map
	or a mesh that have been built especially for navigation.
	
	\param[in,out] navigation A valid NAVIGATION structure pointer.
	\param[in] obj A valid OBJ structure pointer.
	\param[in] mesh_index The mesh index of the OBJMESH to use to create the NAVIGATION mesh.
	
	\return Return 1 if the NAVIGATION mesh have been generated successfully, else this function will return 0.
*/
unsigned char NAVIGATION_build( NAVIGATION *navigation, OBJ *obj, unsigned int mesh_index )
{
	unsigned int i = 0,
				 j = 0,
				 k = 0,
				 triangle_count = 0;
	
	int *indices = NULL;
	
	OBJMESH *objmesh = &obj->objmesh[ mesh_index ];
	
	vec3 *vertex_array = ( vec3 * ) malloc( objmesh->n_objvertexdata * sizeof( vec3 ) ),
		 *vertex_start = vertex_array;

	rcHeightfield *rcheightfield;
	
	rcCompactHeightfield *rccompactheightfield;
	
	rcContourSet *rccontourset;

	rcPolyMesh *rcpolymesh;
	
	rcPolyMeshDetail *rcpolymeshdetail;
	
	
	while( i != objmesh->n_objvertexdata )
	{ 
		memcpy( vertex_array,
				&obj->indexed_vertex[ objmesh->objvertexdata[ i ].vertex_index ],
				sizeof( vec3 ) );
				
		vec3_to_recast( vertex_array );
		
		++vertex_array;						
		++i;
	}
	
	
	i = 0;
	while( i != objmesh->n_objtrianglelist )
	{
		triangle_count += objmesh->objtrianglelist[ i ].n_indice_array;
	
		indices = ( int * ) realloc( indices, triangle_count * sizeof( int ) );
	
		j = 0;
		while( j != objmesh->objtrianglelist[ i ].n_indice_array )
		{
			indices[ k ] = objmesh->objtrianglelist[ i ].indice_array[ j ];
		
			++k;
			++j;
		}

		++i;
	}
	
	triangle_count /= 3;
	
	rcConfig rcconfig;

	memset( &rcconfig, 0, sizeof( rcConfig ) );
	
	rcconfig.cs						= navigation->navigationconfiguration.cell_size;
	rcconfig.ch						= navigation->navigationconfiguration.cell_height;
	rcconfig.walkableHeight			= ( int )ceilf ( navigation->navigationconfiguration.agent_height / rcconfig.ch );
	rcconfig.walkableRadius			= ( int )ceilf ( navigation->navigationconfiguration.agent_radius / rcconfig.cs );
	rcconfig.walkableClimb			= ( int )floorf( navigation->navigationconfiguration.agent_max_climb / rcconfig.ch );
	rcconfig.walkableSlopeAngle		= navigation->navigationconfiguration.agent_max_slope;
	rcconfig.minRegionSize			= ( int )rcSqr( navigation->navigationconfiguration.region_min_size );
	rcconfig.mergeRegionSize		= ( int )rcSqr( navigation->navigationconfiguration.region_merge_size );
	rcconfig.maxEdgeLen				= ( int )( navigation->navigationconfiguration.edge_max_len / rcconfig.cs );
	rcconfig.maxSimplificationError = navigation->navigationconfiguration.edge_max_error;
	rcconfig.maxVertsPerPoly		= ( int )navigation->navigationconfiguration.vert_per_poly;
	rcconfig.detailSampleDist		= rcconfig.cs * navigation->navigationconfiguration.detail_sample_dst;
	rcconfig.detailSampleMaxError   = rcconfig.ch * navigation->navigationconfiguration.detail_sample_max_error;
			
	
	rcCalcBounds( ( float * )vertex_start,
				  objmesh->n_objvertexdata,
				  rcconfig.bmin,
				  rcconfig.bmax );
	
	
	rcCalcGridSize(  rcconfig.bmin,
					 rcconfig.bmax,
					 rcconfig.cs,
					&rcconfig.width,
					&rcconfig.height );


	rcheightfield = rcAllocHeightfield();

	rcCreateHeightfield( *rcheightfield,
						  rcconfig.width,
						  rcconfig.height,
						  rcconfig.bmin,
						  rcconfig.bmax,
						  rcconfig.cs,
						  rcconfig.ch );


	navigation->triangle_flags = new unsigned char[ triangle_count ];
	
	memset( navigation->triangle_flags, 0, triangle_count * sizeof( unsigned char ) );
	
	rcMarkWalkableTriangles( rcconfig.walkableSlopeAngle,
							 ( float * )vertex_start,
							 objmesh->n_objvertexdata,
							 indices,
							 triangle_count,
							 navigation->triangle_flags );
	

	rcRasterizeTriangles( ( float * )vertex_start,
						  objmesh->n_objvertexdata,
						  indices,
						  navigation->triangle_flags,
						  triangle_count,
						 *rcheightfield,
						  rcconfig.walkableClimb );


	delete []navigation->triangle_flags;
	navigation->triangle_flags = NULL;

	free( vertex_start );
	free( indices      );
	

	rcFilterLowHangingWalkableObstacles(  rcconfig.walkableClimb,
										 *rcheightfield );
	
	
	rcFilterLedgeSpans(  rcconfig.walkableHeight,
						 rcconfig.walkableClimb,
						*rcheightfield );
	
	
	rcFilterWalkableLowHeightSpans(  rcconfig.walkableHeight,
									*rcheightfield );

	
	rccompactheightfield = rcAllocCompactHeightfield();

	rcBuildCompactHeightfield( rcconfig.walkableHeight,
							   rcconfig.walkableClimb,
							   RC_WALKABLE,
							   *rcheightfield,
							   *rccompactheightfield );

	rcFreeHeightField( rcheightfield );
	rcheightfield = NULL;

	rcErodeArea( RC_WALKABLE_AREA,
				 rcconfig.walkableRadius,
				 *rccompactheightfield );


	rcBuildDistanceField( *rccompactheightfield );


	rcBuildRegions( *rccompactheightfield,
					 rcconfig.borderSize,
					 rcconfig.minRegionSize,
					 rcconfig.mergeRegionSize );


	rccontourset = rcAllocContourSet();

	rcBuildContours( *rccompactheightfield,
					  rcconfig.maxSimplificationError,
					  rcconfig.maxEdgeLen,
					 *rccontourset );


	rcpolymesh = rcAllocPolyMesh();
	
	rcBuildPolyMesh( *rccontourset,
					  rcconfig.maxVertsPerPoly,
					 *rcpolymesh );


	rcpolymeshdetail = rcAllocPolyMeshDetail();

	rcBuildPolyMeshDetail( *rcpolymesh,
						   *rccompactheightfield,
							rcconfig.detailSampleDist,
							rcconfig.detailSampleMaxError,
						   *rcpolymeshdetail );


	rcFreeCompactHeightfield( rccompactheightfield );
	rccompactheightfield = NULL;
	
	rcFreeContourSet( rccontourset );
	rccontourset = NULL;


	if( rcconfig.maxVertsPerPoly <= DT_VERTS_PER_POLYGON )
	{
		dtNavMeshCreateParams dtnavmeshcreateparams;
		
		unsigned char *nav_data = NULL;
		
		int nav_data_size = 0;
	
		i = 0;
		while( i != rcpolymesh->npolys )
		{
			if( rcpolymesh->areas[ i ] == RC_WALKABLE_AREA )
			{
				rcpolymesh->areas[ i ] = 0;
				rcpolymesh->flags[ i ] = 0x01;
			}
							
			++i;
		}


		memset( &dtnavmeshcreateparams, 0, sizeof( dtNavMeshCreateParams ) );
		
		dtnavmeshcreateparams.verts			   = rcpolymesh->verts;
		dtnavmeshcreateparams.vertCount		   = rcpolymesh->nverts;
		dtnavmeshcreateparams.polys			   = rcpolymesh->polys;
		dtnavmeshcreateparams.polyAreas		   = rcpolymesh->areas;
		dtnavmeshcreateparams.polyFlags		   = rcpolymesh->flags;
		dtnavmeshcreateparams.polyCount		   = rcpolymesh->npolys;
		dtnavmeshcreateparams.nvp			   = rcpolymesh->nvp;
		
		dtnavmeshcreateparams.detailMeshes	   = rcpolymeshdetail->meshes;
		dtnavmeshcreateparams.detailVerts	   = rcpolymeshdetail->verts;
		dtnavmeshcreateparams.detailVertsCount = rcpolymeshdetail->nverts;
		dtnavmeshcreateparams.detailTris       = rcpolymeshdetail->tris;
		dtnavmeshcreateparams.detailTriCount   = rcpolymeshdetail->ntris;
		
		dtnavmeshcreateparams.walkableHeight   = navigation->navigationconfiguration.agent_height;
		dtnavmeshcreateparams.walkableRadius   = navigation->navigationconfiguration.agent_radius;
		dtnavmeshcreateparams.walkableClimb    = navigation->navigationconfiguration.agent_max_climb;
		
		rcVcopy( dtnavmeshcreateparams.bmin, rcpolymesh->bmin );
		rcVcopy( dtnavmeshcreateparams.bmax, rcpolymesh->bmax );
		
		dtnavmeshcreateparams.cs = rcconfig.cs;
		dtnavmeshcreateparams.ch = rcconfig.ch;
		
		
		dtCreateNavMeshData( &dtnavmeshcreateparams,
							 &nav_data,
							 &nav_data_size );
		
		if( !nav_data ) return 0;
		
		navigation->dtnavmesh = dtAllocNavMesh();
		
		navigation->dtnavmesh->init( nav_data,
									 nav_data_size,
									 DT_TILE_FREE_DATA,
									 NAVIGATION_MAX_NODE );
		
		rcFreePolyMesh( rcpolymesh );
		rcpolymesh = NULL;
		
		rcFreePolyMeshDetail( rcpolymeshdetail );
		rcpolymeshdetail = NULL;
		
		return 1;
	}
	
	return 0;
}
コード例 #16
0
unsigned char* Sample_TileMesh::buildTileMesh(const int tx, const int ty, const float* bmin, const float* bmax, int& dataSize)
{
	if (!m_geom || !m_geom->getMesh() || !m_geom->getChunkyMesh())
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Input mesh is not specified.");
		return 0;
	}
	
	m_tileMemUsage = 0;
	m_tileBuildTime = 0;
	
	cleanup();
	
	const float* verts = m_geom->getMesh()->getVerts();
	const int nverts = m_geom->getMesh()->getVertCount();
	const int ntris = m_geom->getMesh()->getTriCount();
	const rcChunkyTriMesh* chunkyMesh = m_geom->getChunkyMesh();
		
	// Init build configuration from GUI
	memset(&m_cfg, 0, sizeof(m_cfg));
	m_cfg.cs = m_cellSize;
	m_cfg.ch = m_cellHeight;
	m_cfg.walkableSlopeAngle = m_agentMaxSlope;
	m_cfg.walkableHeight = (int)ceilf(m_agentHeight / m_cfg.ch);
	m_cfg.walkableClimb = (int)floorf(m_agentMaxClimb / m_cfg.ch);
	m_cfg.walkableRadius = (int)ceilf(m_agentRadius / m_cfg.cs);
	m_cfg.maxEdgeLen = (int)(m_edgeMaxLen / m_cellSize);
	m_cfg.maxSimplificationError = m_edgeMaxError;
	m_cfg.minRegionArea = (int)rcSqr(m_regionMinSize);		// Note: area = size*size
	m_cfg.mergeRegionArea = (int)rcSqr(m_regionMergeSize);	// Note: area = size*size
	m_cfg.maxVertsPerPoly = (int)m_vertsPerPoly;
	m_cfg.tileSize = (int)m_tileSize;
	m_cfg.borderSize = m_cfg.walkableRadius + 3; // Reserve enough padding.
	m_cfg.width = m_cfg.tileSize + m_cfg.borderSize*2;
	m_cfg.height = m_cfg.tileSize + m_cfg.borderSize*2;
	m_cfg.detailSampleDist = m_detailSampleDist < 0.9f ? 0 : m_cellSize * m_detailSampleDist;
	m_cfg.detailSampleMaxError = m_cellHeight * m_detailSampleMaxError;
	
	rcVcopy(m_cfg.bmin, bmin);
	rcVcopy(m_cfg.bmax, bmax);
	m_cfg.bmin[0] -= m_cfg.borderSize*m_cfg.cs;
	m_cfg.bmin[2] -= m_cfg.borderSize*m_cfg.cs;
	m_cfg.bmax[0] += m_cfg.borderSize*m_cfg.cs;
	m_cfg.bmax[2] += m_cfg.borderSize*m_cfg.cs;
	
	// Reset build times gathering.
	m_ctx->resetTimers();
	
	// Start the build process.
	m_ctx->startTimer(RC_TIMER_TOTAL);
	
	m_ctx->log(RC_LOG_PROGRESS, "Building navigation:");
	m_ctx->log(RC_LOG_PROGRESS, " - %d x %d cells", m_cfg.width, m_cfg.height);
	m_ctx->log(RC_LOG_PROGRESS, " - %.1fK verts, %.1fK tris", nverts/1000.0f, ntris/1000.0f);
	
	// Allocate voxel heightfield where we rasterize our input data to.
	m_solid = rcAllocHeightfield();
	if (!m_solid)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'solid'.");
		return 0;
	}
	if (!rcCreateHeightfield(m_ctx, *m_solid, m_cfg.width, m_cfg.height, m_cfg.bmin, m_cfg.bmax, m_cfg.cs, m_cfg.ch))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create solid heightfield.");
		return 0;
	}
	
	// Allocate array that can hold triangle flags.
	// If you have multiple meshes you need to process, allocate
	// and array which can hold the max number of triangles you need to process.
	m_triareas = new unsigned char[chunkyMesh->maxTrisPerChunk];
	if (!m_triareas)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'm_triareas' (%d).", chunkyMesh->maxTrisPerChunk);
		return 0;
	}
	
	float tbmin[2], tbmax[2];
	tbmin[0] = m_cfg.bmin[0];
	tbmin[1] = m_cfg.bmin[2];
	tbmax[0] = m_cfg.bmax[0];
	tbmax[1] = m_cfg.bmax[2];
	int cid[512];// TODO: Make grow when returning too many items.
	const int ncid = rcGetChunksOverlappingRect(chunkyMesh, tbmin, tbmax, cid, 512);
	if (!ncid)
		return 0;
	
	m_tileTriCount = 0;
	
	for (int i = 0; i < ncid; ++i)
	{
		const rcChunkyTriMeshNode& node = chunkyMesh->nodes[cid[i]];
		const int* tris = &chunkyMesh->tris[node.i*3];
		const int ntris = node.n;
		
		m_tileTriCount += ntris;
		
		memset(m_triareas, 0, ntris*sizeof(unsigned char));
		rcMarkWalkableTriangles(m_ctx, m_cfg.walkableSlopeAngle,
								verts, nverts, tris, ntris, m_triareas);
		
		rcRasterizeTriangles(m_ctx, verts, nverts, tris, m_triareas, ntris, *m_solid, m_cfg.walkableClimb);
	}
	
	if (!m_keepInterResults)
	{
		delete [] m_triareas;
		m_triareas = 0;
	}
	
	// Once all geometry is rasterized, we do initial pass of filtering to
	// remove unwanted overhangs caused by the conservative rasterization
	// as well as filter spans where the character cannot possibly stand.
	rcFilterLowHangingWalkableObstacles(m_ctx, m_cfg.walkableClimb, *m_solid);
	rcFilterLedgeSpans(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid);
	rcFilterWalkableLowHeightSpans(m_ctx, m_cfg.walkableHeight, *m_solid);
	
	// Compact the heightfield so that it is faster to handle from now on.
	// This will result more cache coherent data as well as the neighbours
	// between walkable cells will be calculated.
	m_chf = rcAllocCompactHeightfield();
	if (!m_chf)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'chf'.");
		return 0;
	}
	if (!rcBuildCompactHeightfield(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid, *m_chf))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build compact data.");
		return 0;
	}
	
	if (!m_keepInterResults)
	{
		rcFreeHeightField(m_solid);
		m_solid = 0;
	}

	// Erode the walkable area by agent radius.
	if (!rcErodeWalkableArea(m_ctx, m_cfg.walkableRadius, *m_chf))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not erode.");
		return false;
	}

	// (Optional) Mark areas.
	const ConvexVolume* vols = m_geom->getConvexVolumes();
	for (int i  = 0; i < m_geom->getConvexVolumeCount(); ++i)
		rcMarkConvexPolyArea(m_ctx, vols[i].verts, vols[i].nverts, vols[i].hmin, vols[i].hmax, (unsigned char)vols[i].area, *m_chf);
	
	// Prepare for region partitioning, by calculating distance field along the walkable surface.
	if (!rcBuildDistanceField(m_ctx, *m_chf))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build distance field.");
		return 0;
	}
	
	// Partition the walkable surface into simple regions without holes.
	if (!rcBuildRegions(m_ctx, *m_chf, m_cfg.borderSize, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build regions.");
		return 0;
	}
 
	// Create contours.
	m_cset = rcAllocContourSet();
	if (!m_cset)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'cset'.");
		return 0;
	}
	if (!rcBuildContours(m_ctx, *m_chf, m_cfg.maxSimplificationError, m_cfg.maxEdgeLen, *m_cset))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create contours.");
		return 0;
	}
	
	if (m_cset->nconts == 0)
	{
		return 0;
	}
	
	// Build polygon navmesh from the contours.
	m_pmesh = rcAllocPolyMesh();
	if (!m_pmesh)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'pmesh'.");
		return 0;
	}
	if (!rcBuildPolyMesh(m_ctx, *m_cset, m_cfg.maxVertsPerPoly, *m_pmesh))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not triangulate contours.");
		return 0;
	}
	
	// Build detail mesh.
	m_dmesh = rcAllocPolyMeshDetail();
	if (!m_dmesh)
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'dmesh'.");
		return 0;
	}
	
	if (!rcBuildPolyMeshDetail(m_ctx, *m_pmesh, *m_chf,
							   m_cfg.detailSampleDist, m_cfg.detailSampleMaxError,
							   *m_dmesh))
	{
		m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could build polymesh detail.");
		return 0;
	}
	
	if (!m_keepInterResults)
	{
		rcFreeCompactHeightfield(m_chf);
		m_chf = 0;
		rcFreeContourSet(m_cset);
		m_cset = 0;
	}
	
	unsigned char* navData = 0;
	int navDataSize = 0;
	if (m_cfg.maxVertsPerPoly <= DT_VERTS_PER_POLYGON)
	{
		// Remove padding from the polymesh data. TODO: Remove this odditity.
		for (int i = 0; i < m_pmesh->nverts; ++i)
		{
			unsigned short* v = &m_pmesh->verts[i*3];
			v[0] -= (unsigned short)m_cfg.borderSize;
			v[2] -= (unsigned short)m_cfg.borderSize;
		}
		
		if (m_pmesh->nverts >= 0xffff)
		{
			// The vertex indices are ushorts, and cannot point to more than 0xffff vertices.
			m_ctx->log(RC_LOG_ERROR, "Too many vertices per tile %d (max: %d).", m_pmesh->nverts, 0xffff);
			return false;
		}
		
		// Update poly flags from areas.
		for (int i = 0; i < m_pmesh->npolys; ++i)
		{
			if (m_pmesh->areas[i] == RC_WALKABLE_AREA)
				m_pmesh->areas[i] = SAMPLE_POLYAREA_GROUND;
			
			if (m_pmesh->areas[i] == SAMPLE_POLYAREA_GROUND ||
				m_pmesh->areas[i] == SAMPLE_POLYAREA_GRASS ||
				m_pmesh->areas[i] == SAMPLE_POLYAREA_ROAD)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK;
			}
			else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_WATER)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_SWIM;
			}
			else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_DOOR)
			{
				m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK | SAMPLE_POLYFLAGS_DOOR;
			}
		}
		
		dtNavMeshCreateParams params;
		memset(&params, 0, sizeof(params));
		params.verts = m_pmesh->verts;
		params.vertCount = m_pmesh->nverts;
		params.polys = m_pmesh->polys;
		params.polyAreas = m_pmesh->areas;
		params.polyFlags = m_pmesh->flags;
		params.polyCount = m_pmesh->npolys;
		params.nvp = m_pmesh->nvp;
		params.detailMeshes = m_dmesh->meshes;
		params.detailVerts = m_dmesh->verts;
		params.detailVertsCount = m_dmesh->nverts;
		params.detailTris = m_dmesh->tris;
		params.detailTriCount = m_dmesh->ntris;
		params.offMeshConVerts = m_geom->getOffMeshConnectionVerts();
		params.offMeshConRad = m_geom->getOffMeshConnectionRads();
		params.offMeshConDir = m_geom->getOffMeshConnectionDirs();
		params.offMeshConAreas = m_geom->getOffMeshConnectionAreas();
		params.offMeshConFlags = m_geom->getOffMeshConnectionFlags();
		params.offMeshConUserID = m_geom->getOffMeshConnectionId();
		params.offMeshConCount = m_geom->getOffMeshConnectionCount();
		params.walkableHeight = m_agentHeight;
		params.walkableRadius = m_agentRadius;
		params.walkableClimb = m_agentMaxClimb;
		params.tileX = tx;
		params.tileY = ty;
		rcVcopy(params.bmin, bmin);
		rcVcopy(params.bmax, bmax);
		params.cs = m_cfg.cs;
		params.ch = m_cfg.ch;
		params.tileSize = m_cfg.tileSize;
		
		if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
		{
			m_ctx->log(RC_LOG_ERROR, "Could not build Detour navmesh.");
			return 0;
		}
		
		// Restore padding so that the debug visualization is correct.
		for (int i = 0; i < m_pmesh->nverts; ++i)
		{
			unsigned short* v = &m_pmesh->verts[i*3];
			v[0] += (unsigned short)m_cfg.borderSize;
			v[2] += (unsigned short)m_cfg.borderSize;
		}
		
	}
	m_tileMemUsage = navDataSize/1024.0f;
	
	m_ctx->stopTimer(RC_TIMER_TOTAL);
	
	// Show performance stats.
	duLogBuildTimes(*m_ctx, m_ctx->getAccumulatedTime(RC_TIMER_TOTAL));
	m_ctx->log(RC_LOG_PROGRESS, ">> Polymesh: %d vertices  %d polygons", m_pmesh->nverts, m_pmesh->npolys);
	
	m_tileBuildTime = m_ctx->getAccumulatedTime(RC_TIMER_TOTAL)/1000.0f;

	dataSize = navDataSize;
	return navData;
}
コード例 #17
0
bool NavMesher::Build()
{
  // ******* Only for OBJ Loading ****
 cleanup();
 const char * filepath = "../../media/models/";
 if (!m_geom || !m_geom->loadMesh(filepath))
 {
  delete m_geom;
  m_geom = 0;
  
  m_ctx->log(RC_LOG_ERROR, "Geom load log %s:");
 }
 assert(m_geom);
 if (!m_geom || !m_geom->getMesh())
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Input mesh is not specified.");
  return false;
 }
 if(m_geom->getMesh()->getTriCount() <= 0 || m_geom->getMesh()->getVertCount()<=0)
  Ogre::Exception(0,Ogre::String("Bad verts or Triangle count. Verts: "+
  StringConverter::toString( m_geom->getMesh()->getVertCount()) + "/n"
  + "Triangles :" +StringConverter::toString(m_geom->getMesh()->getTriCount())),"NavMesher::Build");
 
 //reset timer
 Ogre::Timer tm;
 tm.reset();
 unsigned long stime = tm.getMicroseconds();
 //clear existing
 Clear();
  // ******* Only for OBJ Loading ****
 const float* bmin = m_geom->getMeshBoundsMin();
 const float* bmax = m_geom->getMeshBoundsMax();
 const float* verts = m_geom->getMesh()->getVerts();
 const int nverts = m_geom->getMesh()->getVertCount();
 const int *tris = m_geom->getMesh()->getTris();
 const int ntris = m_geom->getMesh()->getTriCount();

 if(sizeof(tris) <= 0 || ntris <= 0) {
  return false;
 }
 //
 // Step 1. Initialize build config.
 //
 
 // Init build configuration from GUI
 memset(&m_cfg, 0, sizeof(m_cfg));
 m_cfg.cs = m_cellSize;
 m_cfg.ch = m_cellHeight;
 m_cfg.walkableSlopeAngle = m_agentMaxSlope;
 m_cfg.walkableHeight = (int)ceilf(m_agentHeight / m_cfg.ch);
 m_cfg.walkableClimb = (int)floorf(m_agentMaxClimb / m_cfg.ch);
 m_cfg.walkableRadius = (int)ceilf(m_agentRadius / m_cfg.cs);
 m_cfg.maxEdgeLen = (int)(m_edgeMaxLen / m_cellSize);
 m_cfg.maxSimplificationError = m_edgeMaxError;
 m_cfg.minRegionArea = (int)rcSqr(m_regionMinSize);  // Note: area = size*size
 m_cfg.mergeRegionArea = (int)rcSqr(m_regionMergeSize); // Note: area = size*size
 m_cfg.maxVertsPerPoly = (int)m_vertsPerPoly;
 m_cfg.detailSampleDist = m_detailSampleDist < 0.9f ? 0 : m_cellSize * m_detailSampleDist;
 m_cfg.detailSampleMaxError = m_cellHeight * m_detailSampleMaxError;
 
 // Set the area where the navigation will be build.
 // Here the bounds of the input mesh are used, but the
 // area could be specified by an user defined box, etc.
 rcVcopy(m_cfg.bmin, bmin);
 rcVcopy(m_cfg.bmax, bmax);
 rcCalcGridSize(m_cfg.bmin, m_cfg.bmax, m_cfg.cs, &m_cfg.width, &m_cfg.height);
 // Reset build times gathering.
 m_ctx->resetTimers();
 // Start the build process. 
 m_ctx->startTimer(RC_TIMER_TOTAL);
 
 m_ctx->log(RC_LOG_PROGRESS, "Building navigation:");
 m_ctx->log(RC_LOG_PROGRESS, " - %d x %d cells", m_cfg.width, m_cfg.height);
 m_ctx->log(RC_LOG_PROGRESS, " - %.1fK verts, %.1fK tris", nverts/1000.0f, ntris/1000.0f);
 
 //
 // Step 2. Rasterize input polygon soup.
 //
 
 // Allocate voxel heightfield where we rasterize our input data to.
 m_solid = rcAllocHeightfield();
 if (!m_solid)
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'solid'.");
  return false;
 }
 if (!rcCreateHeightfield(m_ctx, *m_solid, m_cfg.width, m_cfg.height, m_cfg.bmin, m_cfg.bmax, m_cfg.cs, m_cfg.ch))
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create solid heightfield.");
  return false;
 }
 
 // Allocate array that can hold triangle area types.
 // If you have multiple meshes you need to process, allocate
 // and array which can hold the max number of triangles you need to process.
 m_triareas = new unsigned char[ntris];
 if (!m_triareas)
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'm_triareas' (%d).", ntris);
  return false;
 }
 
 // Find triangles which are walkable based on their slope and rasterize them.
 // If your input data is multiple meshes, you can transform them here, calculate
 // the are type for each of the meshes and rasterize them.
 memset(m_triareas, 0, ntris*sizeof(unsigned char));
 rcMarkWalkableTriangles(m_ctx, m_cfg.walkableSlopeAngle, verts, nverts, tris, ntris, m_triareas);
 rcRasterizeTriangles(m_ctx, verts, nverts, tris, m_triareas, ntris, *m_solid, m_cfg.walkableClimb);
 if (!m_keepInterResults)
 {
  delete [] m_triareas;
  m_triareas = 0;
 }
 
 //
 // Step 3. Filter walkables surfaces.
 //
 
 // Once all geoemtry is rasterized, we do initial pass of filtering to
 // remove unwanted overhangs caused by the conservative rasterization
 // as well as filter spans where the character cannot possibly stand.
 rcFilterLowHangingWalkableObstacles(m_ctx, m_cfg.walkableClimb, *m_solid);
 rcFilterLedgeSpans(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid);
 rcFilterWalkableLowHeightSpans(m_ctx, m_cfg.walkableHeight, *m_solid);

 //
 // Step 4. Partition walkable surface to simple regions.
 //
 // Compact the heightfield so that it is faster to handle from now on.
 // This will result more cache coherent data as well as the neighbours
 // between walkable cells will be calculated.
 m_chf = rcAllocCompactHeightfield();
 if (!m_chf)
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'chf'.");
  return false;
 }
 if (!rcBuildCompactHeightfield(m_ctx, m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid, *m_chf))
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build compact data.");
  return false;
 }
 
 if (!m_keepInterResults)
 {
  rcFreeHeightField(m_solid);
  m_solid = 0;
 }
  
 // Erode the walkable area by agent radius.
 if (!rcErodeWalkableArea(m_ctx, m_cfg.walkableRadius, *m_chf))
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not erode.");
  return false;
 }
 // (Optional) Mark areas.
 const ConvexVolume* vols = m_geom->getConvexVolumes();
 for (int i  = 0; i < m_geom->getConvexVolumeCount(); ++i)
  rcMarkConvexPolyArea(m_ctx, vols[i].verts, vols[i].nverts, vols[i].hmin, vols[i].hmax, (unsigned char)vols[i].area, *m_chf);
 
 if (m_monotonePartitioning)
 {
  // Partition the walkable surface into simple regions without holes.
  // Monotone partitioning does not need distancefield.
  if (!rcBuildRegionsMonotone(m_ctx, *m_chf, 0, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
  {
   m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build regions.");
   return false;
  }
 }
 else
 {
  // Prepare for region partitioning, by calculating distance field along the walkable surface.
  if (!rcBuildDistanceField(m_ctx, *m_chf))
  {
   m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build distance field.");
   return false;
  }
  // Partition the walkable surface into simple regions without holes.
  if (!rcBuildRegions(m_ctx, *m_chf, 0, m_cfg.minRegionArea, m_cfg.mergeRegionArea))
  {
   m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build regions.");
   return false;
  }
 }
 //
 // Step 5. Trace and simplify region contours.
 //
 
 // Create contours.
 m_cset = rcAllocContourSet();
 if (!m_cset)
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'cset'.");
  return false;
 }
 if (!rcBuildContours(m_ctx, *m_chf, m_cfg.maxSimplificationError, m_cfg.maxEdgeLen, *m_cset))
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not create contours.");
  return false;
 }
 
 //
 // Step 6. Build polygons mesh from contours.
 //
 
 // Build polygon navmesh from the contours.
 m_pmesh = rcAllocPolyMesh();
 if (!m_pmesh)
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'pmesh'.");
  return false;
 }
 if (!rcBuildPolyMesh(m_ctx, *m_cset, m_cfg.maxVertsPerPoly, *m_pmesh))
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not triangulate contours.");
  return false;
 }
 
 //
 // Step 7. Create detail mesh which allows to access approximate height on each polygon.
 //
 
 m_dmesh = rcAllocPolyMeshDetail();
 if (!m_dmesh)
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Out of memory 'pmdtl'.");
  return false;
 }
 if (!rcBuildPolyMeshDetail(m_ctx, *m_pmesh, *m_chf, m_cfg.detailSampleDist, m_cfg.detailSampleMaxError, *m_dmesh))
 {
  m_ctx->log(RC_LOG_ERROR, "buildNavigation: Could not build detail mesh.");
  return false;
 }
 if (!m_keepInterResults)
 {
  rcFreeCompactHeightfield(m_chf);
  m_chf = 0;
  rcFreeContourSet(m_cset);
  m_cset = 0;
 }

 // At this point the navigation mesh data is ready, you can access it from m_pmesh.
 // See rcDebugDrawPolyMesh or dtCreateNavMeshData as examples how to access the data.
 
 //
 // (Optional) Step 8. Create Detour data from Recast poly mesh.
 //
 
 // The GUI may allow more max points per polygon than Detour can handle.
 // Only build the detour navmesh if we do not exceed the limit.
 unsigned char* navData = 0;
 int navDataSize = 0;
 // Update poly flags from areas.

 for (int i = 0; i < m_pmesh->npolys; ++i)
 {
  if (m_pmesh->areas[i] == RC_WALKABLE_AREA)
   m_pmesh->areas[i] = SAMPLE_POLYAREA_GROUND;
   
  if (m_pmesh->areas[i] == SAMPLE_POLYAREA_GROUND ||
   m_pmesh->areas[i] == SAMPLE_POLYAREA_GRASS ||
   m_pmesh->areas[i] == SAMPLE_POLYAREA_ROAD)
  {
   m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK;
  }
  else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_WATER)
  {
   m_pmesh->flags[i] = SAMPLE_POLYFLAGS_SWIM;
  }
  else if (m_pmesh->areas[i] == SAMPLE_POLYAREA_DOOR)
  {
   m_pmesh->flags[i] = SAMPLE_POLYFLAGS_WALK | SAMPLE_POLYFLAGS_DOOR;
  }
 }

 memset(&m_params, 0, sizeof(m_params));
 m_params.verts = m_pmesh->verts;
 m_params.vertCount = m_pmesh->nverts;
 m_params.polys = m_pmesh->polys;
 m_params.polyAreas = m_pmesh->areas;
 m_params.polyFlags = m_pmesh->flags;
 m_params.polyCount = m_pmesh->npolys;
 m_params.nvp = m_pmesh->nvp;
 m_params.detailMeshes = m_dmesh->meshes;
 m_params.detailVerts = m_dmesh->verts;
 m_params.detailVertsCount = m_dmesh->nverts;
 m_params.detailTris = m_dmesh->tris;
 m_params.detailTriCount = m_dmesh->ntris;
 m_params.walkableHeight = m_agentHeight;
 m_params.walkableRadius = m_agentRadius;
 m_params.walkableClimb = m_agentMaxClimb;
 rcVcopy(m_params.bmin, m_pmesh->bmin);
 rcVcopy(m_params.bmax, m_pmesh->bmax);
 m_params.cs = m_cfg.cs;
 m_params.ch = m_cfg.ch;
 m_params.buildBvTree = true;
 if (!dtCreateNavMeshData(&m_params, &navData, &navDataSize)) {
   m_ctx->log(RC_LOG_ERROR, "Could not build Detour navmesh.");
  return false;
 }
 
 m_navMesh = dtAllocNavMesh();
 if (!m_navMesh) {
  delete [] navData;
   m_ctx->log(RC_LOG_ERROR, "Could not create Detour navmesh");
  return false;
 }
 m_navQuery = dtAllocNavMeshQuery(); 
 dtStatus status = m_navQuery->init(m_navMesh, 2048);
   if (dtStatusFailed(status)) {
           m_ctx->log(RC_LOG_ERROR, "Could not init Detour navmesh query");
           return false;
   }
 if (!m_navMesh->init(navData, navDataSize, true)) {
  delete [] navData;
   m_ctx->log(RC_LOG_ERROR, "Could not init Detour navmesh");
  return false;
 }
 //take time
 stime = tm.getMicroseconds() - stime;
 DrawDebug();
 return true;
}
コード例 #18
0
    void MapBuilder::buildMoveMapTile(uint32 mapID, uint32 tileX, uint32 tileY,
        MeshData &meshData, float bmin[3], float bmax[3],
        dtNavMesh* navMesh)
    {
        // console output
        std::string tileString = Trinity::StringFormat("[Map %04u] [%02i,%02i]: ", mapID, tileX, tileY);
        printf("%s Building movemap tiles...\n", tileString.c_str());

        IntermediateValues iv;

        float* tVerts = meshData.solidVerts.getCArray();
        int tVertCount = meshData.solidVerts.size() / 3;
        int* tTris = meshData.solidTris.getCArray();
        int tTriCount = meshData.solidTris.size() / 3;

        float* lVerts = meshData.liquidVerts.getCArray();
        int lVertCount = meshData.liquidVerts.size() / 3;
        int* lTris = meshData.liquidTris.getCArray();
        int lTriCount = meshData.liquidTris.size() / 3;
        uint8* lTriFlags = meshData.liquidType.getCArray();

        // these are WORLD UNIT based metrics
        // this are basic unit dimentions
        // value have to divide GRID_SIZE(533.3333f) ( aka: 0.5333, 0.2666, 0.3333, 0.1333, etc )
        const static float BASE_UNIT_DIM = m_bigBaseUnit ? 0.5333333f : 0.2666666f;

        // All are in UNIT metrics!
        const static int VERTEX_PER_MAP = int(GRID_SIZE/BASE_UNIT_DIM + 0.5f);
        const static int VERTEX_PER_TILE = m_bigBaseUnit ? 40 : 80; // must divide VERTEX_PER_MAP
        const static int TILES_PER_MAP = VERTEX_PER_MAP/VERTEX_PER_TILE;

        rcConfig config;
        memset(&config, 0, sizeof(rcConfig));

        rcVcopy(config.bmin, bmin);
        rcVcopy(config.bmax, bmax);

        config.maxVertsPerPoly = DT_VERTS_PER_POLYGON;
        config.cs = BASE_UNIT_DIM;
        config.ch = BASE_UNIT_DIM;
        config.walkableSlopeAngle = m_maxWalkableAngle;
        config.tileSize = VERTEX_PER_TILE;
        config.walkableRadius = m_bigBaseUnit ? 1 : 2;
        config.borderSize = config.walkableRadius + 3;
        config.maxEdgeLen = VERTEX_PER_TILE + 1;        // anything bigger than tileSize
        config.walkableHeight = m_bigBaseUnit ? 3 : 6;
        // a value >= 3|6 allows npcs to walk over some fences
        // a value >= 4|8 allows npcs to walk over all fences
        config.walkableClimb = m_bigBaseUnit ? 4 : 8;
        config.minRegionArea = rcSqr(60);
        config.mergeRegionArea = rcSqr(50);
        config.maxSimplificationError = 1.8f;           // eliminates most jagged edges (tiny polygons)
        config.detailSampleDist = config.cs * 64;
        config.detailSampleMaxError = config.ch * 2;

        // this sets the dimensions of the heightfield - should maybe happen before border padding
        rcCalcGridSize(config.bmin, config.bmax, config.cs, &config.width, &config.height);

        // allocate subregions : tiles
        Tile* tiles = new Tile[TILES_PER_MAP * TILES_PER_MAP];

        // Initialize per tile config.
        rcConfig tileCfg = config;
        tileCfg.width = config.tileSize + config.borderSize*2;
        tileCfg.height = config.tileSize + config.borderSize*2;

        // merge per tile poly and detail meshes
        rcPolyMesh** pmmerge = new rcPolyMesh*[TILES_PER_MAP * TILES_PER_MAP];
        rcPolyMeshDetail** dmmerge = new rcPolyMeshDetail*[TILES_PER_MAP * TILES_PER_MAP];
        int nmerge = 0;
        // build all tiles
        for (int y = 0; y < TILES_PER_MAP; ++y)
        {
            for (int x = 0; x < TILES_PER_MAP; ++x)
            {
                Tile& tile = tiles[x + y * TILES_PER_MAP];

                // Calculate the per tile bounding box.
                tileCfg.bmin[0] = config.bmin[0] + float(x*config.tileSize - config.borderSize)*config.cs;
                tileCfg.bmin[2] = config.bmin[2] + float(y*config.tileSize - config.borderSize)*config.cs;
                tileCfg.bmax[0] = config.bmin[0] + float((x+1)*config.tileSize + config.borderSize)*config.cs;
                tileCfg.bmax[2] = config.bmin[2] + float((y+1)*config.tileSize + config.borderSize)*config.cs;

                // build heightfield
                tile.solid = rcAllocHeightfield();
                if (!tile.solid || !rcCreateHeightfield(m_rcContext, *tile.solid, tileCfg.width, tileCfg.height, tileCfg.bmin, tileCfg.bmax, tileCfg.cs, tileCfg.ch))
                {
                    printf("%s Failed building heightfield!            \n", tileString.c_str());
                    continue;
                }

                // mark all walkable tiles, both liquids and solids
                unsigned char* triFlags = new unsigned char[tTriCount];
                memset(triFlags, NAV_GROUND, tTriCount*sizeof(unsigned char));
                rcClearUnwalkableTriangles(m_rcContext, tileCfg.walkableSlopeAngle, tVerts, tVertCount, tTris, tTriCount, triFlags);
                rcRasterizeTriangles(m_rcContext, tVerts, tVertCount, tTris, triFlags, tTriCount, *tile.solid, config.walkableClimb);
                delete[] triFlags;

                rcFilterLowHangingWalkableObstacles(m_rcContext, config.walkableClimb, *tile.solid);
                rcFilterLedgeSpans(m_rcContext, tileCfg.walkableHeight, tileCfg.walkableClimb, *tile.solid);
                rcFilterWalkableLowHeightSpans(m_rcContext, tileCfg.walkableHeight, *tile.solid);

                rcRasterizeTriangles(m_rcContext, lVerts, lVertCount, lTris, lTriFlags, lTriCount, *tile.solid, config.walkableClimb);

                // compact heightfield spans
                tile.chf = rcAllocCompactHeightfield();
                if (!tile.chf || !rcBuildCompactHeightfield(m_rcContext, tileCfg.walkableHeight, tileCfg.walkableClimb, *tile.solid, *tile.chf))
                {
                    printf("%s Failed compacting heightfield!            \n", tileString.c_str());
                    continue;
                }

                // build polymesh intermediates
                if (!rcErodeWalkableArea(m_rcContext, config.walkableRadius, *tile.chf))
                {
                    printf("%s Failed eroding area!                    \n", tileString.c_str());
                    continue;
                }

                if (!rcBuildDistanceField(m_rcContext, *tile.chf))
                {
                    printf("%s Failed building distance field!         \n", tileString.c_str());
                    continue;
                }

                if (!rcBuildRegions(m_rcContext, *tile.chf, tileCfg.borderSize, tileCfg.minRegionArea, tileCfg.mergeRegionArea))
                {
                    printf("%s Failed building regions!                \n", tileString.c_str());
                    continue;
                }

                tile.cset = rcAllocContourSet();
                if (!tile.cset || !rcBuildContours(m_rcContext, *tile.chf, tileCfg.maxSimplificationError, tileCfg.maxEdgeLen, *tile.cset))
                {
                    printf("%s Failed building contours!               \n", tileString.c_str());
                    continue;
                }

                // build polymesh
                tile.pmesh = rcAllocPolyMesh();
                if (!tile.pmesh || !rcBuildPolyMesh(m_rcContext, *tile.cset, tileCfg.maxVertsPerPoly, *tile.pmesh))
                {
                    printf("%s Failed building polymesh!               \n", tileString.c_str());
                    continue;
                }

                tile.dmesh = rcAllocPolyMeshDetail();
                if (!tile.dmesh || !rcBuildPolyMeshDetail(m_rcContext, *tile.pmesh, *tile.chf, tileCfg.detailSampleDist, tileCfg.detailSampleMaxError, *tile.dmesh))
                {
                    printf("%s Failed building polymesh detail!        \n", tileString.c_str());
                    continue;
                }

                // free those up
                // we may want to keep them in the future for debug
                // but right now, we don't have the code to merge them
                rcFreeHeightField(tile.solid);
                tile.solid = NULL;
                rcFreeCompactHeightfield(tile.chf);
                tile.chf = NULL;
                rcFreeContourSet(tile.cset);
                tile.cset = NULL;

                pmmerge[nmerge] = tile.pmesh;
                dmmerge[nmerge] = tile.dmesh;
                nmerge++;
            }
        }

        iv.polyMesh = rcAllocPolyMesh();
        if (!iv.polyMesh)
        {
            printf("%s alloc iv.polyMesh FAILED!\n", tileString.c_str());
            delete[] pmmerge;
            delete[] dmmerge;
            delete[] tiles;
            return;
        }
        rcMergePolyMeshes(m_rcContext, pmmerge, nmerge, *iv.polyMesh);

        iv.polyMeshDetail = rcAllocPolyMeshDetail();
        if (!iv.polyMeshDetail)
        {
            printf("%s alloc m_dmesh FAILED!\n", tileString.c_str());
            delete[] pmmerge;
            delete[] dmmerge;
            delete[] tiles;
            return;
        }
        rcMergePolyMeshDetails(m_rcContext, dmmerge, nmerge, *iv.polyMeshDetail);

        // free things up
        delete[] pmmerge;
        delete[] dmmerge;
        delete[] tiles;

        // set polygons as walkable
        // TODO: special flags for DYNAMIC polygons, ie surfaces that can be turned on and off
        for (int i = 0; i < iv.polyMesh->npolys; ++i)
            if (iv.polyMesh->areas[i] & RC_WALKABLE_AREA)
                iv.polyMesh->flags[i] = iv.polyMesh->areas[i];

        // setup mesh parameters
        dtNavMeshCreateParams params;
        memset(&params, 0, sizeof(params));
        params.verts = iv.polyMesh->verts;
        params.vertCount = iv.polyMesh->nverts;
        params.polys = iv.polyMesh->polys;
        params.polyAreas = iv.polyMesh->areas;
        params.polyFlags = iv.polyMesh->flags;
        params.polyCount = iv.polyMesh->npolys;
        params.nvp = iv.polyMesh->nvp;
        params.detailMeshes = iv.polyMeshDetail->meshes;
        params.detailVerts = iv.polyMeshDetail->verts;
        params.detailVertsCount = iv.polyMeshDetail->nverts;
        params.detailTris = iv.polyMeshDetail->tris;
        params.detailTriCount = iv.polyMeshDetail->ntris;

        params.offMeshConVerts = meshData.offMeshConnections.getCArray();
        params.offMeshConCount = meshData.offMeshConnections.size()/6;
        params.offMeshConRad = meshData.offMeshConnectionRads.getCArray();
        params.offMeshConDir = meshData.offMeshConnectionDirs.getCArray();
        params.offMeshConAreas = meshData.offMeshConnectionsAreas.getCArray();
        params.offMeshConFlags = meshData.offMeshConnectionsFlags.getCArray();

        params.walkableHeight = BASE_UNIT_DIM*config.walkableHeight;    // agent height
        params.walkableRadius = BASE_UNIT_DIM*config.walkableRadius;    // agent radius
        params.walkableClimb = BASE_UNIT_DIM*config.walkableClimb;      // keep less that walkableHeight (aka agent height)!
        params.tileX = (((bmin[0] + bmax[0]) / 2) - navMesh->getParams()->orig[0]) / GRID_SIZE;
        params.tileY = (((bmin[2] + bmax[2]) / 2) - navMesh->getParams()->orig[2]) / GRID_SIZE;
        rcVcopy(params.bmin, bmin);
        rcVcopy(params.bmax, bmax);
        params.cs = config.cs;
        params.ch = config.ch;
        params.tileLayer = 0;
        params.buildBvTree = true;

        // will hold final navmesh
        unsigned char* navData = NULL;
        int navDataSize = 0;

        do
        {
            // these values are checked within dtCreateNavMeshData - handle them here
            // so we have a clear error message
            if (params.nvp > DT_VERTS_PER_POLYGON)
            {
                printf("%s Invalid verts-per-polygon value!        \n", tileString.c_str());
                break;
            }
            if (params.vertCount >= 0xffff)
            {
                printf("%s Too many vertices!                      \n", tileString.c_str());
                break;
            }
            if (!params.vertCount || !params.verts)
            {
                // occurs mostly when adjacent tiles have models
                // loaded but those models don't span into this tile

                // message is an annoyance
                //printf("%sNo vertices to build tile!              \n", tileString.c_str());
                break;
            }
            if (!params.polyCount || !params.polys ||
                TILES_PER_MAP*TILES_PER_MAP == params.polyCount)
            {
                // we have flat tiles with no actual geometry - don't build those, its useless
                // keep in mind that we do output those into debug info
                // drop tiles with only exact count - some tiles may have geometry while having less tiles
                printf("%s No polygons to build on tile!              \n", tileString.c_str());
                break;
            }
            if (!params.detailMeshes || !params.detailVerts || !params.detailTris)
            {
                printf("%s No detail mesh to build tile!           \n", tileString.c_str());
                break;
            }

            printf("%s Building navmesh tile...\n", tileString.c_str());
            if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
            {
                printf("%s Failed building navmesh tile!           \n", tileString.c_str());
                break;
            }

            dtTileRef tileRef = 0;
            printf("%s Adding tile to navmesh...\n", tileString.c_str());
            // DT_TILE_FREE_DATA tells detour to unallocate memory when the tile
            // is removed via removeTile()
            dtStatus dtResult = navMesh->addTile(navData, navDataSize, DT_TILE_FREE_DATA, 0, &tileRef);
            if (!tileRef || dtResult != DT_SUCCESS)
            {
                printf("%s Failed adding tile to navmesh!           \n", tileString.c_str());
                break;
            }

            // file output
            char fileName[255];
            sprintf(fileName, "mmaps/%04u%02i%02i.mmtile", mapID, tileY, tileX);
            FILE* file = fopen(fileName, "wb");
            if (!file)
            {
                char message[1024];
                sprintf(message, "[Map %04u] Failed to open %s for writing!\n", mapID, fileName);
                perror(message);
                navMesh->removeTile(tileRef, NULL, NULL);
                break;
            }

            printf("%s Writing to file...\n", tileString.c_str());

            // write header
            MmapTileHeader header;
            header.usesLiquids = m_terrainBuilder->usesLiquids();
            header.size = uint32(navDataSize);
            fwrite(&header, sizeof(MmapTileHeader), 1, file);

            // write data
            fwrite(navData, sizeof(unsigned char), navDataSize, file);
            fclose(file);

            // now that tile is written to disk, we can unload it
            navMesh->removeTile(tileRef, NULL, NULL);
        }
        while (0);

        if (m_debugOutput)
        {
            // restore padding so that the debug visualization is correct
            for (int i = 0; i < iv.polyMesh->nverts; ++i)
            {
                unsigned short* v = &iv.polyMesh->verts[i*3];
                v[0] += (unsigned short)config.borderSize;
                v[2] += (unsigned short)config.borderSize;
            }

            iv.generateObjFile(mapID, tileX, tileY, meshData);
            iv.writeIV(mapID, tileX, tileY);
        }
    }
コード例 #19
0
bool RecastInterface::buildNavMesh(InputGeometry* inputGeom)
{
	

	//Step 1 : Initialize build configuration
	//Start the timers.
	
#ifdef _DEBUG
	std::cout << "NavMesh build started." << std::endl;
	unsigned long start = Ogre::Root::getSingleton().getTimer()->getMilliseconds();
	unsigned long end = 0;
#endif

	//Step 2 : Rasterize input polygon soup
	//InputGeometry* input = inputGeom; WTF? Is this necessary?
	rcVcopy(_config.bmin, inputGeom->getMeshBoundsMin());
	rcVcopy(_config.bmax, inputGeom->getMeshBoundsMax());
	rcCalcGridSize(_config.bmin,_config.bmax,_config.cs,&_config.width,&_config.height);

	int numVerts = inputGeom->getVertexCount();
	int numTris = inputGeom->getTriangleCount();

#ifdef _DEBUG
	Ogre::Vector3 min,max;
	Utility::floatPtr_toVector3(inputGeom->getMeshBoundsMin(),min);
	Utility::floatPtr_toVector3(inputGeom->getMeshBoundsMax(),max);
	std::cout << "Bounds: min=" << min << " max=" << max << std::endl;
	
	std::cout << "Building navmesh" << std::endl;
	std::cout << " - " << _config.width << " x " << _config.height << std::endl;
	std::cout << " - " << numVerts / 1000.0f << "K vertices, ";
	std::cout << numTris / 1000.0f << "K triangles" << std::endl;

	//_printConfig();
#endif

	_solid = rcAllocHeightfield();
	if(!_solid)
	{
		std::cout << "Error! Out of memory needed for '_solid'." << std::endl;
		return false;
	}
	if(!rcCreateHeightfield(_context,*_solid,
							_config.width,_config.height,
							_config.bmin,_config.bmax,
							_config.cs,_config.ch))
	{
		std::cout << "Error! Couldn't create heightfield, try higher cellSize and cellHeight values." << std::endl;
		return false;
	}

	//holds triangle area types
	_triangleAreas = new unsigned char[numTris];
	if(!_triangleAreas)
	{
		std::cout << "Error! Out of memory '_triangleAreas'([" << numTris << "])" << std::endl;
		return false;
	}

	//find triangles that are walkable in slope and rasterize them
	memset(_triangleAreas,0,numTris * sizeof(unsigned char));
	rcMarkWalkableTriangles(_context,_config.walkableSlopeAngle,
							inputGeom->getVertices(),inputGeom->getVertexCount(),
							inputGeom->getTriangles(),inputGeom->getTriangleCount(),
							_triangleAreas);
	rcRasterizeTriangles(_context,inputGeom->getVertices(),inputGeom->getVertexCount(),
						 inputGeom->getTriangles(),_triangleAreas,
						 inputGeom->getTriangleCount(),*_solid,_config.walkableClimb);

	//I know I put this option in the params, but...
	if(!_recastParams.getKeepIntermediateResults())
	{
		delete[] _triangleAreas;
		_triangleAreas = nullptr;
	}

	//Step 3 : Filter walkables surfaces
	//Initial pass of filtering to remove unwanted overhangs caused
	//by the conservative rasterization.
	//Also filters spans where the character can't stand.
	rcFilterLowHangingWalkableObstacles(_context,_config.walkableClimb,*_solid);
	rcFilterLedgeSpans(_context,_config.walkableHeight,_config.walkableClimb,*_solid);
	rcFilterWalkableLowHeightSpans(_context,_config.walkableHeight,*_solid);

	//Step 4 : Partition walkable surface to simple regions
	//Compact the heightfield so that it is faster to handle from now on.
	_compactHeightfield = rcAllocCompactHeightfield();
	if(!_compactHeightfield)
	{
		std::cout << "Error! Out of memory '_compactHeightfield'" << std::endl;
		return false;
	}
	if(!rcBuildCompactHeightfield(_context,
								  _config.walkableHeight,_config.walkableClimb,
								  *_solid,*_compactHeightfield))
	{
		std::cout << "Error! BuildNav - Could not build compact data." << std::endl;
		return false;
	}

	if(!_recastParams.getKeepIntermediateResults())
	{
		rcFreeHeightField(_solid);
		_solid = nullptr;
	}

	//Erode walkable area by agent radius
	if(!rcErodeWalkableArea(_context,_config.walkableRadius,*_compactHeightfield))
	{
		std::cout << "Error! BuildNav - Could not erode walkable areas." << std::endl;
		return false;
	}

	//Prepare for region partitioning, generate distance field
	if(!rcBuildDistanceField(_context,*_compactHeightfield))
	{
		std::cout << "Error! BuildNav - Could not build distance field." << std::endl;
		return false;
	}

	//Partition the walkable surface into simple regions w/o holes
	if(!rcBuildRegions(_context,*_compactHeightfield,
					   _config.borderSize,
					   _config.minRegionArea,_config.mergeRegionArea))
	{
		std::cout << "Error! BuildNav - Could not build regions." << std::endl;
		return false;
	}

	//Step 5 : Trace and simplify region contours.
	//create contours
	_contourSet = rcAllocContourSet();
	if(!_contourSet)
	{
		std::cout << "Error! BuildNav - Out of memory '_contourSet'" << std::endl;
		return false;
	}

	if(!rcBuildContours(_context,*_compactHeightfield,_config.maxSimplificationError,_config.maxEdgeLen,*_contourSet))
	{
		
		std::cout << "Error! BuildNav - Could not create contours." << std::endl;
		return false;
	}

	if(_contourSet->nconts == 0)
	{
		//Check this thread for details on solving these:
		//http://groups.google.com/group/recastnavigation/browse_thread/thread/a6fbd509859a12c8
		std::cout << "Error! BuildNav - RecastNav created no contours!" << std::endl;
		std::cout << _compactHeightfield->spanCount << std::endl;
	}

	//Step 6 : Build polygons mesh from contours
	//Build polygon navmesh from the contours
	_polyMesh = rcAllocPolyMesh();
	if(!_polyMesh)
	{
		std::cout << "Error! Out of memory '_polyMesh'." << std::endl;
		return false;
	}

	if(!rcBuildPolyMesh(_context,*_contourSet,_config.maxVertsPerPoly,*_polyMesh))
	{
		std::cout << "Error! BuildNav - Could not triangulate contours." << std::endl;
	}

	//Step 7 : Create detail mesh which allows access to approximate height on each polygon.
	_detailMesh = rcAllocPolyMeshDetail();
	if(!_detailMesh)
	{
		std::cout << "Error! Out of memory '_detailMesh'." << std::endl;
		return false;
	}

	if(!rcBuildPolyMeshDetail(_context,
							  *_polyMesh,*_compactHeightfield,
							  _config.detailSampleDist,_config.detailSampleMaxError,
							  *_detailMesh))
	{
		std::cout << "Error! BuildNav - Could not build detail mesh." << std::endl;
		return false;
	}

	if(!_recastParams.getKeepIntermediateResults())
	{
		rcFreeCompactHeightfield(_compactHeightfield);
		_compactHeightfield = nullptr;

		rcFreeContourSet(_contourSet);
		_contourSet = nullptr;
	}

	//Recast navmesh is finished!
#ifdef _DEBUG
	end = Ogre::Root::getSingletonPtr()->getTimer()->getMilliseconds();
	std::cout << "Navmesh build finished." << std::endl;
	std::cout << " - Time elapsed:" << end - start << "ms" << std::endl;
#endif

	return true;
}
コード例 #20
0
ファイル: TileBuilder.cpp プロジェクト: Exodius/DeathCore
uint8* TileBuilder::BuildInstance( dtNavMeshParams& navMeshParams )
{
    float* bmin = NULL, *bmax = NULL;

    _Geometry->CalculateBoundingBox(bmin, bmax);

    rcVcopy(InstanceConfig.bmax, bmax);
    rcVcopy(InstanceConfig.bmin, bmin);

    uint32 numVerts = _Geometry->Vertices.size();
    uint32 numTris = _Geometry->Triangles.size();
    float* vertices;
    int* triangles;
    uint8* areas;
    _Geometry->GetRawData(vertices, triangles, areas);

    // this sets the dimensions of the heightfield
    rcCalcGridSize(InstanceConfig.bmin, InstanceConfig.bmax, InstanceConfig.cs, &InstanceConfig.width, &InstanceConfig.height);

    rcHeightfield* hf = rcAllocHeightfield();
    rcCreateHeightfield(Context, *hf, InstanceConfig.width, InstanceConfig.height, InstanceConfig.bmin, InstanceConfig.bmax, InstanceConfig.cs, InstanceConfig.ch);

    rcClearUnwalkableTriangles(Context, InstanceConfig.walkableSlopeAngle, vertices, numVerts, triangles, numTris, areas);
    rcRasterizeTriangles(Context, vertices, numVerts, triangles, areas, numTris, *hf, InstanceConfig.walkableClimb);

    rcFilterLowHangingWalkableObstacles(Context, InstanceConfig.walkableClimb, *hf);
    rcFilterLedgeSpans(Context, InstanceConfig.walkableHeight, InstanceConfig.walkableClimb, *hf);
    rcFilterWalkableLowHeightSpans(Context, InstanceConfig.walkableHeight, *hf);

    rcCompactHeightfield* chf = rcAllocCompactHeightfield();
    rcBuildCompactHeightfield(Context, InstanceConfig.walkableHeight, InstanceConfig.walkableClimb, *hf, *chf);

    rcErodeWalkableArea(Context, InstanceConfig.walkableRadius, *chf);
    rcBuildDistanceField(Context, *chf);
    rcBuildRegions(Context, *chf, InstanceConfig.borderSize, InstanceConfig.minRegionArea, InstanceConfig.minRegionArea);

    rcContourSet* contours = rcAllocContourSet();
    rcBuildContours(Context, *chf, InstanceConfig.maxSimplificationError, InstanceConfig.maxEdgeLen, *contours);

    rcPolyMesh* pmesh = rcAllocPolyMesh();
    rcBuildPolyMesh(Context, *contours, InstanceConfig.maxVertsPerPoly, *pmesh);

    rcPolyMeshDetail* dmesh = rcAllocPolyMeshDetail();
    rcBuildPolyMeshDetail(Context, *pmesh, *chf, InstanceConfig.detailSampleDist, InstanceConfig.detailSampleMaxError, *dmesh);

    // Set flags according to area types (e.g. Swim for Water)
    for (int i = 0; i < pmesh->npolys; i++)
    {
        if (pmesh->areas[i] == Constants::POLY_AREA_ROAD || pmesh->areas[i] == Constants::POLY_AREA_TERRAIN)
            pmesh->flags[i] = Constants::POLY_FLAG_WALK;
        else if (pmesh->areas[i] == Constants::POLY_AREA_WATER)
            pmesh->flags[i] = Constants::POLY_FLAG_SWIM;
    }

    dtNavMeshCreateParams params;
    memset(&params, 0, sizeof(params));
    // PolyMesh data
    params.verts = pmesh->verts;
    params.vertCount = pmesh->nverts;
    params.polys = pmesh->polys;
    params.polyAreas = pmesh->areas;
    params.polyFlags = pmesh->flags;
    params.polyCount = pmesh->npolys;
    params.nvp = pmesh->nvp;
    // PolyMeshDetail data
    params.detailMeshes = dmesh->meshes;
    params.detailVerts = dmesh->verts;
    params.detailVertsCount = dmesh->nverts;
    params.detailTris = dmesh->tris;
    params.detailTriCount = dmesh->ntris;
    rcVcopy(params.bmin, pmesh->bmin);
    rcVcopy(params.bmax, pmesh->bmax);
    // General settings
    params.ch = InstanceConfig.ch;
    params.cs = InstanceConfig.cs;
    params.walkableClimb = InstanceConfig.walkableClimb * InstanceConfig.ch;
    params.walkableHeight = InstanceConfig.walkableHeight * InstanceConfig.ch;
    params.walkableRadius = InstanceConfig.walkableRadius * InstanceConfig.cs;
    params.tileX = X;
    params.tileY = Y;
    params.tileLayer = 0;
    params.buildBvTree = true;

    rcVcopy(params.bmax, bmax);
    rcVcopy(params.bmin, bmin);

    // Offmesh-connection settings
    params.offMeshConCount = 0; // none for now

    rcFreeHeightField(hf);
    rcFreeCompactHeightfield(chf);
    rcFreeContourSet(contours);
    delete vertices;
    delete triangles;
    delete areas;
    delete bmin;
    delete bmax;

    if (!params.polyCount || !params.polys || Constants::TilesPerMap * Constants::TilesPerMap == params.polyCount)
    {
        // we have flat tiles with no actual geometry - don't build those, its useless
        // keep in mind that we do output those into debug info
        // drop tiles with only exact count - some tiles may have geometry while having less tiles
        printf("No polygons to build on tile, skipping.\n");
        rcFreePolyMesh(pmesh);
        rcFreePolyMeshDetail(dmesh);
        return NULL;
    }

    int navDataSize;
    uint8* navData;
    printf("Creating the navmesh with %i vertices, %i polys, %i triangles!\n", params.vertCount, params.polyCount, params.detailTriCount);
    bool result = dtCreateNavMeshData(&params, &navData, &navDataSize);

    rcFreePolyMesh(pmesh);
    rcFreePolyMeshDetail(dmesh);

    if (result)
    {
        printf("NavMesh created, size %i!\n", navDataSize);
        DataSize = navDataSize;
        return navData;
    }

    return NULL;
}
コード例 #21
0
  /*
   * Tries to load vmap and tilemap for a gridtile and creates a navmesh for it.
   *
   */
  bool
  ModelContainerView::generateMoveMapForTile (int pMapId, int x, int y)
  {
        bool result = iVMapManager.loadMap (gVMapDataDir.c_str (), pMapId, x, y) == VMAP_LOAD_RESULT_OK;
        if (result == VMAP_LOAD_RESULT_OK)
        {
            //VMap loaded. Add data from vmap to global Triangle-Array
            parseVMap (pMapId, x, y);
        }
        // Add data from Height-Map to global Triangle-Array
        generateHeightMap(pMapId,x,y);
        // We will now add all triangles inside the given zone to the vectormap.
        // We could also do additional checks here.
        double x_max = (32-x)*SIZE_OF_GRIDS + 50;
        double y_max = (32-y)*SIZE_OF_GRIDS + 50;
        double x_min = x_max - SIZE_OF_GRIDS - 100;
        double y_min = y_max - SIZE_OF_GRIDS - 100;
        Vector3 low = Vector3(x_min,y_min,-inf());
        Vector3 high = Vector3(x_max,y_max,inf());
        AABox checkBox = AABox(low,high);
        AABox check;
        Triangle t;
        //each triangle has mangos format.
        for (int i = 0; i < globalTriangleArray.size(); i++) {
            t = globalTriangleArray[i];
            t.getBounds(check);
            if (checkBox.contains(check)) {
                // Write it down in detour format.
                iGlobArray.append(t.vertex(0).y,t.vertex(0).z,t.vertex(0).x);
                iGlobArray.append(t.vertex(1).y,t.vertex(1).z,t.vertex(1).x);
                iGlobArray.append(t.vertex(2).y,t.vertex(2).z,t.vertex(2).x);
            }
                
        }
        if (iGlobArray.size() == 0) {
            printf("No models - check your mmap.datadir in your config");
            return true;
        }

        if(gMakeObjFile)
            debugGenerateObjFile(); // create obj file for Recast Demo viewer
        //return true;
        float bmin[3], bmax[3];
        /*
         * The format looks like this
         * Verticle = float[3]
         * Triangle = Verticle[3]
         * So there are
         * array.size() floats
         * that means there are
         * nverts = array.size()/3 Verticles
         * that means there are
         * ntris = nverts/3
         */
         //array/3 verticles
        const int nverts = iGlobArray.size()/3; // because 1 vert is 3 float.
        // -> vert = float[3]
        const float* verts = iGlobArray.getCArray();
        rcCalcBounds(verts,nverts,bmin,bmax);
        // nverts/3 triangles
        // -> Triangle = vert[3] = float[9]
        int* tris = new int[nverts];// because 1 triangle is 3 verts
        for (int i = 0; i< nverts; i++)
            tris[i] = i;
        /* tris[i] = 1,2,3;4,5,6;7,8,9;
         *
         */
        const int ntris = (nverts/3);
	rcConfig m_cfg;
	//
	// Step 1. Initialize build config.
	//

	// Init build configuration from GUI
	memset(&m_cfg, 0, sizeof(m_cfg));
        // Change config settings here!
	m_cfg.cs = 0.3f;
	m_cfg.ch = 0.2f;
	m_cfg.walkableSlopeAngle = 50.0f;
	m_cfg.walkableHeight = 10;
	m_cfg.walkableClimb = 4;
	m_cfg.walkableRadius = 2;
	m_cfg.maxEdgeLen = (int)(12 / 0.3f);
	m_cfg.maxSimplificationError = 1.3f;
	m_cfg.minRegionSize = (int)rcSqr(50);
	m_cfg.mergeRegionSize = (int)rcSqr(20);
	m_cfg.maxVertsPerPoly = (int)6;
	m_cfg.detailSampleDist = 1.8f;
	m_cfg.detailSampleMaxError = 0.2f * 1;
        bool m_keepInterResults = false;
        printf("CellSize        : %.2f\n",m_cfg.cs);
        printf("CellHeight      : %.2f\n",m_cfg.ch);
        printf("WalkableSlope   : %.2f\n",m_cfg.walkableSlopeAngle);
        printf("WalkableHeight  : %i\n",m_cfg.walkableHeight);
        printf("walkableClimb   : %i\n",m_cfg.walkableClimb);
        printf("walkableRadius  : %i\n",m_cfg.walkableRadius);
        printf("maxEdgeLen      : %i\n",m_cfg.maxEdgeLen);
        printf("maxSimplific.Er.: %.2f\n",m_cfg.maxSimplificationError);
        printf("minRegionSize   : %i\n",m_cfg.minRegionSize);
        printf("mergedRegSize   : %i\n",m_cfg.mergeRegionSize);
        printf("maxVertsPerPoly : %i\n",m_cfg.maxVertsPerPoly);
        printf("detailSampledist: %.2f\n",m_cfg.detailSampleDist);
        printf("det.Samp.max.err: %.2f\n",m_cfg.detailSampleMaxError);
	// Set the area where the navigation will be build.
	// Here the bounds of the input mesh are used, but the
	// area could be specified by an user defined box, etc.
	vcopy(m_cfg.bmin, bmin);
	vcopy(m_cfg.bmax, bmax);
	rcCalcGridSize(m_cfg.bmin, m_cfg.bmax, m_cfg.cs, &m_cfg.width, &m_cfg.height);

	//
	// Step 2. Rasterize input polygon soup.
	//

	// Allocate voxel heighfield where we rasterize our input data to.
	rcHeightfield* m_solid = new rcHeightfield;
	if (!m_solid)
	{
		printf("buildNavigation: Out of memory 'solid'.\n");
		return false;
	}
	if (!rcCreateHeightfield(*m_solid, m_cfg.width, m_cfg.height, m_cfg.bmin, m_cfg.bmax, m_cfg.cs, m_cfg.ch))
	{
		printf("buildNavigation: Could not create solid heightfield.\n");
		return false;
	}

	// Allocate array that can hold triangle flags.
	// If you have multiple meshes you need to process, allocate
	// and array which can hold the max number of triangles you need to process.
	unsigned char* m_triflags = new unsigned char[ntris];
	if (!m_triflags)
	{
		printf("buildNavigation: Out of memory 'triangleFlags' (%d).\n", ntris);
		return false;
	}

	// Find triangles which are walkable based on their slope and rasterize them.
	// If your input data is multiple meshes, you can transform them here, calculate
	// the flags for each of the meshes and rasterize them.
	memset(m_triflags, 0, ntris*sizeof(unsigned char));
	rcMarkWalkableTriangles(m_cfg.walkableSlopeAngle, verts, nverts, tris, ntris, m_triflags);
	rcRasterizeTriangles(verts, nverts, tris, m_triflags, ntris, *m_solid, m_cfg.walkableClimb);

    // should delete [] verts?  - probably not, this is just pointer to data in a G3D Array
    // should delete [] tris?

	if (!m_keepInterResults)
	{
		delete [] m_triflags;
		m_triflags = 0;
	}

	//
	// Step 3. Filter walkables surfaces.
	//

	// Once all geoemtry is rasterized, we do initial pass of filtering to
	// remove unwanted overhangs caused by the conservative rasterization
	// as well as filter spans where the character cannot possibly stand.
	rcFilterLowHangingWalkableObstacles(m_cfg.walkableClimb, *m_solid);
	rcFilterLedgeSpans(m_cfg.walkableHeight, m_cfg.walkableClimb, *m_solid);
	rcFilterWalkableLowHeightSpans(m_cfg.walkableHeight, *m_solid);


	//
	// Step 4. Partition walkable surface to simple regions.
	//

	// Compact the heightfield so that it is faster to handle from now on.
	// This will result more cache coherent data as well as the neighbours
	// between walkable cells will be calculated.
	rcCompactHeightfield* m_chf = new rcCompactHeightfield;
	if (!m_chf)
	{
		printf("buildNavigation: Out of memory 'chf'.\n");
		return false;
	}
	if (!rcBuildCompactHeightfield(m_cfg.walkableHeight, m_cfg.walkableClimb, RC_WALKABLE, *m_solid, *m_chf))
	{
		printf( "buildNavigation: Could not build compact data.\n");
		return false;
	}

	if (!m_keepInterResults)
	{
		delete m_solid;
		m_solid = 0;
	}

	// Erode the walkable area by agent radius.
	if (!rcErodeArea(RC_WALKABLE_AREA, m_cfg.walkableRadius, *m_chf))
	{
		printf("buildNavigation: Could not erode.\n");
		return false;
	}

	// (Optional) Mark areas.
	//const ConvexVolume* vols = m_geom->getConvexVolumes();
	//for (int i  = 0; i < m_geom->getConvexVolumeCount(); ++i)
	//	rcMarkConvexPolyArea(vols[i].verts, vols[i].nverts, vols[i].hmin, vols[i].hmax, (unsigned char)vols[i].area, *m_chf);

	// Prepare for region partitioning, by calculating distance field along the walkable surface.
	if (!rcBuildDistanceField(*m_chf))
	{
		printf("buildNavigation: Could not build distance field.\n");
		return false;
	}

	// Partition the walkable surface into simple regions without holes.
	if (!rcBuildRegions(*m_chf, m_cfg.borderSize, m_cfg.minRegionSize, m_cfg.mergeRegionSize))
	{
		printf("buildNavigation: Could not build regions.\n");
	}

	//
	// Step 5. Trace and simplify region contours.
	//

	// Create contours.
	rcContourSet* m_cset = new rcContourSet;
	if (!m_cset)
	{
		printf("buildNavigation: Out of memory 'cset'.\n");
		return false;
	}
	if (!rcBuildContours(*m_chf, m_cfg.maxSimplificationError, m_cfg.maxEdgeLen, *m_cset))
	{
		printf("buildNavigation: Could not create contours.\n");
		return false;
	}

	//
	// Step 6. Build polygons mesh from contours.
	//

	// Build polygon navmesh from the contours.
	rcPolyMesh* m_pmesh = new rcPolyMesh;
	if (!m_pmesh)
	{
		printf("buildNavigation: Out of memory 'pmesh'.\n");
		return false;
	}
	if (!rcBuildPolyMesh(*m_cset, m_cfg.maxVertsPerPoly, *m_pmesh))
	{
		printf( "buildNavigation: Could not triangulate contours.\n");
		return false;
	}

	//
	// Step 7. Create detail mesh which allows to access approximate height on each polygon.
	//

	rcPolyMeshDetail* m_dmesh = new rcPolyMeshDetail;
	if (!m_dmesh)
	{
		printf("buildNavigation: Out of memory 'pmdtl'.\n");
		return false;
	}

	if (!rcBuildPolyMeshDetail(*m_pmesh, *m_chf, m_cfg.detailSampleDist, m_cfg.detailSampleMaxError, *m_dmesh))
	{
		printf("buildNavigation: Could not build detail mesh.\n");
	}

	if (!m_keepInterResults)
	{
		delete m_chf;
		m_chf = 0;
		delete m_cset;
		m_cset = 0;
	}

	// At this point the navigation mesh data is ready, you can access it from m_pmesh.
	// See duDebugDrawPolyMesh or dtCreateNavMeshData as examples how to access the data.

	//
	// (Optional) Step 8. Create Detour data from Recast poly mesh.
	//

	// The GUI may allow more max points per polygon than Detour can handle.
	// Only build the detour navmesh if we do not exceed the limit.
	if (m_cfg.maxVertsPerPoly <= DT_VERTS_PER_POLYGON)
	{
		unsigned char* navData = 0;
		int navDataSize = 0;
                // Update poly flags from areas.
		for (int i = 0; i < m_pmesh->npolys; ++i)
		{
                    // for now all generated navmesh is walkable by everyone.
                    // else there will be no pathfinding at all!
                    m_pmesh->flags[i] = RC_WALKABLE_AREA;
		}

		dtNavMeshCreateParams params;
		memset(&params, 0, sizeof(params));
		params.verts = m_pmesh->verts;
		params.vertCount = m_pmesh->nverts;
		params.polys = m_pmesh->polys;
		params.polyAreas = m_pmesh->areas;
		params.polyFlags = m_pmesh->flags;
		params.polyCount = m_pmesh->npolys;
		params.nvp = m_pmesh->nvp;
		params.detailMeshes = m_dmesh->meshes;
		params.detailVerts = m_dmesh->verts;
		params.detailVertsCount = m_dmesh->nverts;
		params.detailTris = m_dmesh->tris;
		params.detailTriCount = m_dmesh->ntris;
		params.offMeshConVerts = 0;
		params.offMeshConRad = 0;
		params.offMeshConDir = 0;
		params.offMeshConAreas = 0;
		params.offMeshConFlags = 0;
		params.offMeshConCount = 0;
		params.walkableHeight = 2.0f;
		params.walkableRadius = 0.6f;
		params.walkableClimb = 0.9f;
		vcopy(params.bmin, m_pmesh->bmin);
		vcopy(params.bmax, m_pmesh->bmax);
		params.cs = m_cfg.cs;
		params.ch = m_cfg.ch;
		printf("vertcount       : %05u\n",params.vertCount);
                printf("polycount       : %05u\n",params.polyCount);
                printf("detailVertsCount: %05u\n",params.detailVertsCount);
                printf("detailTriCount  : %05u\n",params.detailTriCount);
                printf("walkableClimb   : %.2f\n",params.walkableClimb);
                printf("walkableRadius  : %.2f\n",params.walkableRadius);
                printf("walkableHeight  : %.2f\n",params.walkableHeight);
		if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
		{
			printf("Could not build Detour navmesh.\n");
			return false;
		}
                // navData now contains the MoveMap
                printf("Generated Navigation Mesh! Size: %i bytes/ %i kB / %i MB\n",navDataSize,navDataSize/1024,navDataSize/(1024*1024));
                char tmp[14];
                sprintf(tmp, "%03u%02u%02u.mmap",iMap,ix,iy);
                std::string savefilepath = gMMapDataDir + "/" + tmp;
                ofstream inf( savefilepath.c_str(),ofstream::binary );
                if( inf )
                {
                        inf.write( (char*)( &navData[0] ), navDataSize ) ;
                }
                printf("MoveMap saved under %s\n", savefilepath.c_str());
                delete [] navData;
        }
       // debugLoadNavMesh();
        return (result);
  }