void ProjectManager::initializeSceneManager()
{
assert(QThread::currentThread() == thread());
Ogre::Root& root = Ogre::Root::getSingleton();
Ogre::SceneManager* mgr = NULL;
if(root.hasSceneManager(Application::sSceneManagerName))
{
mgr = root.getSceneManager(Application::sSceneManagerName);
root.destroySceneManager(mgr);
}
mgr = root.createSceneManager(Ogre::ST_GENERIC, Application::sSceneManagerName);
mgr->setShadowTechnique(Ogre::SHADOWTYPE_NONE);
mgr->setAmbientLight(Ogre::ColourValue(1, 1, 1));
mgr->setShadowCasterRenderBackFaces(false);
mgr->setCameraRelativeRendering(true);
mgr->setShowDebugShadows(true);
// This fixes some issues with ray casting when using shallow terrain.
Ogre::AxisAlignedBox box;
Ogre::Vector3 max(100000, 100000, 100000);
box.setExtents(-max, max);
mgr->setOption("Size", &box);
}
/* *******************************************************************************
| implement of CGrassSticks
******************************************************************************* */
void
CGrassSticks::createGrassMesh()
{
MeshPtr mesh = MeshManager::getSingleton().createManual(GRASS_MESH_NAME, ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
// create a submesh with the grass material
SubMesh* sm = mesh->createSubMesh();
sm->setMaterialName("Examples/GrassBlades");
sm->useSharedVertices = false;
sm->vertexData = OGRE_NEW VertexData();
sm->vertexData->vertexStart = 0;
sm->vertexData->vertexCount = 12;
sm->indexData->indexCount = 18;
// specify a vertex format declaration for our mesh: 3 floats for position, 3 floats for normal, 2 floats for UV
VertexDeclaration* decl = sm->vertexData->vertexDeclaration;
decl->addElement(0, 0, VET_FLOAT3, VES_POSITION);
decl->addElement(0, sizeof(float) * 3, VET_FLOAT3, VES_NORMAL);
decl->addElement(0, sizeof(float) * 6, VET_FLOAT2, VES_TEXTURE_COORDINATES, 0);
// create a vertex buffer
HardwareVertexBufferSharedPtr vb = HardwareBufferManager::getSingleton().createVertexBuffer
(decl->getVertexSize(0), sm->vertexData->vertexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
GrassVertex* verts = (GrassVertex*)vb->lock(HardwareBuffer::HBL_DISCARD); // start filling in vertex data
for (unsigned int i = 0; i < 3; i++) // each grass mesh consists of 3 planes
{
// planes intersect along the Y axis with 60 degrees between them
Real x = Math::Cos(Degree(i * 60)) * GRASS_WIDTH / 2;
Real z = Math::Sin(Degree(i * 60)) * GRASS_WIDTH / 2;
for (unsigned int j = 0; j < 4; j++) // each plane has 4 vertices
{
GrassVertex& vert = verts[i * 4 + j];
vert.x = j < 2 ? -x : x;
vert.y = j % 2 ? 0 : GRASS_HEIGHT;
vert.z = j < 2 ? -z : z;
// all normals point straight up
vert.nx = 0;
vert.ny = 1;
vert.nz = 0;
vert.u = j < 2 ? 0 : 1;
vert.v = j % 2;
}
}
vb->unlock(); // commit vertex changes
sm->vertexData->vertexBufferBinding->setBinding(0, vb); // bind vertex buffer to our submesh
// create an index buffer
sm->indexData->indexBuffer = HardwareBufferManager::getSingleton().createIndexBuffer
(HardwareIndexBuffer::IT_16BIT, sm->indexData->indexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
// start filling in index data
Ogre::uint16* indices = (Ogre::uint16*)sm->indexData->indexBuffer->lock(HardwareBuffer::HBL_DISCARD);
for (unsigned int i = 0; i < 3; i++) // each grass mesh consists of 3 planes
{
unsigned int off = i * 4; // each plane consists of 2 triangles
*indices++ = 0 + off;
*indices++ = 3 + off;
*indices++ = 1 + off;
*indices++ = 0 + off;
*indices++ = 2 + off;
*indices++ = 3 + off;
}
sm->indexData->indexBuffer->unlock(); // commit index changes
// update mesh AABB
Ogre::AxisAlignedBox aabb;
aabb.setExtents(-1,-1,-1,1,1,1);
mesh->_setBounds(aabb);
// Ogre::MeshSerializer serial;
// serial.exportMesh(mesh.getPointer(), "grass.mesh");
}
void
Terrain::buildGeometry(Ogre::SceneNode* parent, bool editable)
{
clearGeometry();
assert(parent);
// NB: We must adjust world geometry bounding box, especially for OctreeSceneManager
Ogre::AxisAlignedBox aabb = mData->getBoundBox();
Ogre::Vector3 centre = aabb.getCenter();
const Ogre::Vector3 adjust(2000, 10000, 2000);
const Ogre::Real scale = 1.5f;
aabb.setExtents(
(aabb.getMinimum() - centre) * scale + centre - adjust,
(aabb.getMaximum() - centre) * scale + centre + adjust);
parent->getCreator()->setOption("Size", &aabb);
mEditable = editable;
if (!mData->mXSize || !mData->mZSize)
{
// Do nothing if it's empty terrain.
return;
}
// Prepare atlas texture
for (size_t pixmapId = 0, numPixmap = mData->mPixmaps.size(); pixmapId < numPixmap; ++pixmapId)
{
_getPixmapAtlasId(pixmapId);
}
prepareLightmapTexture();
int depth = mData->mZSize;
int width = mData->mXSize;
int tileSize = mData->mTileSize;
int numTilePerX = mData->mNumTilePerX;
int numTilePerZ = mData->mNumTilePerZ;
if (mEditable)
{
mGridTypeInfos.resize(2);
mGridTypeInfos[0].material.setNull();
mGridTypeInfos[1].material = Ogre::MaterialManager::getSingleton().getByName(
"FairyEditor/GridType");
}
else
{
_initIndexBuffer(tileSize * tileSize);
}
mTiles.reserve(numTilePerX * numTilePerZ);
for (int z = 0; z < numTilePerZ; ++z)
{
for (int x = 0; x < numTilePerX; ++x)
{
// Create the tile
int tileX = x * tileSize;
int tileZ = z * tileSize;
int tileWidth = std::min(width - tileX, tileSize);
int tileDepth = std::min(depth - tileZ, tileSize);
TerrainTile* tile;
if (mEditable)
tile = new TerrainTileEditable(parent, this, tileX, tileZ, tileWidth, tileDepth);
else
tile = new TerrainTileOptimized(parent, this, tileX, tileZ, tileWidth, tileDepth);
// Use the render queue that the world geometry associated with.
tile->setRenderQueueGroup(parent->getCreator()->getWorldGeometryRenderQueue());
// Attach it to the aux data
mTiles.push_back(tile);
}
}
}
BOOL CCamera_Scene::_GetInterPatch(
const Fairy::TerrainData* pTerrainData, //地形数据
const fVector3& fvEyePos, //眼睛的投影位置
CAMERA_INTER_GRIDS& theInterPatch) //地形数据
{
theInterPatch.m_fvGrid.clear();
//是否在地形外面
if(!pTerrainData || !(pTerrainData->isValidCoord(fvEyePos.x, fvEyePos.z))) return FALSE;
//取得最近的Grid交点
std::pair<INT, INT> pJunction = pTerrainData->getJunction(fvEyePos.x, fvEyePos.z);
//最多四个个Grid
theInterPatch.m_fvGrid.reserve(4);
FLOAT fPatchX = pTerrainData->mScale.x*1.0f;
FLOAT fPatchZ = pTerrainData->mScale.z*1.0f;
//取得附近的八个三角形
for(INT i=-1; i<=0; i++)
{
for(INT j=-1; j<=0; j++)
{
INT nGridX = pJunction.first + i;
INT nGridZ = pJunction.second + j;
if(pTerrainData->isValidGrid(nGridX, nGridZ))
{
Ogre::AxisAlignedBox newGridBox;
const Fairy::TerrainData::GridInfo& grid = pTerrainData->getGridInfo(nGridX, nGridZ);
//转化为一个绑定盒
FLOAT fMaxY = -std::numeric_limits<FLOAT>::max();
FLOAT fTemp;
fTemp = pTerrainData->getHeight(nGridX, nGridZ);
if(fTemp > fMaxY) fMaxY = fTemp;
fTemp = pTerrainData->getHeight(nGridX+1, nGridZ);
if(fTemp > fMaxY) fMaxY = fTemp;
fTemp = pTerrainData->getHeight(nGridX, nGridZ+1);
if(fTemp > fMaxY) fMaxY = fTemp;
fTemp = pTerrainData->getHeight(nGridX+1, nGridZ+1);
if(fTemp > fMaxY) fMaxY = fTemp;
newGridBox.setExtents(
nGridX*(pTerrainData->mScale.x) + pTerrainData->mPosition.x,
-std::numeric_limits<FLOAT>::max(),
nGridZ*(pTerrainData->mScale.z) + pTerrainData->mPosition.z,
(nGridX+1)*(pTerrainData->mScale.x) + pTerrainData->mPosition.x,
fMaxY,
(nGridZ+1)*(pTerrainData->mScale.z) + pTerrainData->mPosition.z);
theInterPatch.m_fvGrid.push_back(newGridBox);
}
}
}
if(theInterPatch.m_fvGrid.size() == 2 || theInterPatch.m_fvGrid.size() == 4) return TRUE;
return FALSE;
}