Exemplo n.º 1
0
void
TileNode::updateTileUniforms(const SelectionInfo& selectionInfo)
{
    //assert(_surface.valid());
    // update the tile key uniform
    const osg::BoundingBox& bbox = _surface->getAlignedBoundingBox();
    float width = std::max( (bbox.xMax()-bbox.xMin()), (bbox.yMax()-bbox.yMin()) );

    unsigned tw, th;
    _key.getProfile()->getNumTiles(_key.getLOD(), tw, th);

    _tileKeyUniform->set(osg::Vec4f(_key.getTileX(), th-_key.getTileY()-1.0f, _key.getLOD(), width));

    // update the morph constants

    float start = (float)selectionInfo.visParameters(_key.getLOD())._fMorphStart;
    float end   = (float)selectionInfo.visParameters(_key.getLOD())._fMorphEnd;

    float one_by_end_minus_start = end - start;
    one_by_end_minus_start = 1.0f/one_by_end_minus_start;
    osg::Vec2f morphConstants( end * one_by_end_minus_start, one_by_end_minus_start );
    _tileMorphUniform->set( morphConstants );

    const osg::Image* er = getElevationRaster();
    if ( er )
    {
        // pre-calculate texel-sampling scale and bias coefficients that allow us to sample
        // elevation textures on texel-center instead of edge:
        float size = (float)er->s();
        osg::Vec2f elevTexelOffsets( (size-1.0f)/size, 0.5/size );
        getOrCreateStateSet()->getOrCreateUniform("oe_tile_elevTexelCoeff", osg::Uniform::FLOAT_VEC2)->set(elevTexelOffsets);
    }
}
Exemplo n.º 2
0
bool
TileNode::shouldSubDivide(TerrainCuller* culler, const SelectionInfo& selectionInfo)
{    
    unsigned currLOD = _key.getLOD();

    EngineContext* context = culler->getEngineContext();

    if (context->getOptions().rangeMode() == osg::LOD::PIXEL_SIZE_ON_SCREEN)
    {
        float pixelSize = -1.0;
        if (context->getEngine()->getComputeRangeCallback())
        {
            pixelSize = (*context->getEngine()->getComputeRangeCallback())(this, *culler->_cv);
        }    
        if (pixelSize <= 0.0)
        {
            pixelSize = culler->clampedPixelSize(getBound());
        }
        return (pixelSize > context->getOptions().tilePixelSize().get() * 4);
    }
    else
    {
        float range = (float)selectionInfo.visParameters(currLOD+1)._visibilityRange2;
        if (currLOD < selectionInfo.getNumLODs() && currLOD != selectionInfo.getNumLODs()-1)
        {
            return _surface->anyChildBoxIntersectsSphere(
                culler->getViewPointLocal(), 
                range,
                culler->getLODScale());
        }
    }                 
    return false;
}
Exemplo n.º 3
0
bool
TileNode::shouldSubDivide(osgUtil::CullVisitor* cv, const SelectionInfo& selectionInfo)
{
    unsigned currLOD = _key.getLOD();
    if (currLOD < selectionInfo.numLods() && currLOD != selectionInfo.numLods()-1)
    {
        return _surface->anyChildBoxIntersectsSphere(
            cv->getViewPointLocal(), 
            (float)selectionInfo.visParameters(currLOD+1)._visibilityRange2,
            cv->getLODScale());
    }
    return false;
}
Exemplo n.º 4
0
bool
TileNode::shouldSubDivide(osg::NodeVisitor& nv, const SelectionInfo& selectionInfo, float lodScale)
{
    unsigned currLOD = _key.getLOD();
    if (   currLOD <  selectionInfo.numLods()
        && currLOD != selectionInfo.numLods()-1)
    {
        osg::Vec3 cameraPos = nv.getViewPoint();

        float radius2 = (float)selectionInfo.visParameters(currLOD+1)._visibilityRange2;
        return _surface->anyChildBoxIntersectsSphere(cameraPos, radius2, lodScale);
    }
    return false;
}
Exemplo n.º 5
0
void
TileNode::updateTileUniforms(const SelectionInfo& selectionInfo)
{
    //assert(_surface.valid());
    // update the tile key uniform
    const osg::BoundingBox& bbox = _surface->getAlignedBoundingBox();
    float width = std::max( (bbox.xMax()-bbox.xMin()), (bbox.yMax()-bbox.yMin()) );

    unsigned tw, th;
    _key.getProfile()->getNumTiles(_key.getLOD(), tw, th);

    _tileKeyUniform->set(osg::Vec4f(_key.getTileX(), th-_key.getTileY()-1.0f, _key.getLOD(), width));

    // update the morph constants

    float fStart = (float)selectionInfo.visParameters(_key.getLOD())._fMorphStart;
    float fEnd   = (float)selectionInfo.visParameters(_key.getLOD())._fMorphEnd;

    float one_by_end_minus_start = fEnd - fStart;
    one_by_end_minus_start = 1.0f/one_by_end_minus_start;

    osg::Vec4f morphConstants(
          fStart
        , one_by_end_minus_start
        , fEnd * one_by_end_minus_start
        , one_by_end_minus_start
        );

    _tileMorphUniform->set( morphConstants );

    // Update grid dims
    float fGridDims = selectionInfo.gridDimX()-1;
    _tileGridDimsUniform->set(osg::Vec4f(
        fGridDims,
        fGridDims*0.5f,
        2.0/fGridDims,
        selectionInfo.lodForMorphing(_key.getProfile()->getSRS()->isProjected())));

    // update tile extents
    float fXExtents = fabs(bbox.xMax()-bbox.xMin());
    float fYExtents = fabs(bbox.yMax()-bbox.yMin());
    _tileExtentsUniform->set(osg::Vec4f(fXExtents,fYExtents,0,0));

    const osg::Image* er = getElevationRaster();
    if ( er )
    {
        getOrCreateStateSet()->getOrCreateUniform("oe_tile_elevationSize", osg::Uniform::FLOAT)->set( (float)er->s() );
    }
}
Exemplo n.º 6
0
bool
TileNode::shouldSubDivide(osg::NodeVisitor& nv, const SelectionInfo& selectionInfo, float zoomFactor)
{
    unsigned currLOD = _key.getLOD();
    if (   currLOD <  selectionInfo.numLods()
        && currLOD != selectionInfo.numLods()-1)
    {
        osg::Vec3 cameraPos = nv.getViewPoint();

#if OSGEARTH_REX_TILE_NODE_DEBUG_TRAVERSAL
        OE_INFO << LC <<cameraPos.x()<<" "<<cameraPos.y()<<" "<<cameraPos.z()<<" "<<std::endl;
        OE_INFO << LC <<"LOD Scale: "<<fZoomFactor<<std::endl;
#endif  
        float radius = (float)selectionInfo.visParameters(currLOD+1)._fVisibility;
        bool anyChildVisible = _surface->anyChildBoxIntersectsSphere(cameraPos, radius*radius, zoomFactor);
        return anyChildVisible;
    }
    return false;
}