C++ MeshPtr::getSubMeshIterator方法代码示例

// unload all about this mesh. The mesh itself and the textures.
// BETWEEN FRAME OPERATION
void VisCalcFrustDist::unloadTheMesh(Ogre::MeshPtr meshP) {
	if (m_shouldCullTextures) {
		Ogre::Mesh::SubMeshIterator smi = meshP->getSubMeshIterator();
		while (smi.hasMoreElements()) {
			Ogre::SubMesh* oneSubMesh = smi.getNext();
			Ogre::String subMeshMaterialName = oneSubMesh->getMaterialName();
			Ogre::MaterialPtr subMeshMaterial = (Ogre::MaterialPtr)Ogre::MaterialManager::getSingleton().getByName(subMeshMaterialName);
			if (!subMeshMaterial.isNull()) {
				Ogre::Material::TechniqueIterator techIter = subMeshMaterial->getTechniqueIterator();
				while (techIter.hasMoreElements()) {
					Ogre::Technique* oneTech = techIter.getNext();
					Ogre::Technique::PassIterator passIter = oneTech->getPassIterator();
					while (passIter.hasMoreElements()) {
						Ogre::Pass* onePass = passIter.getNext();
						Ogre::Pass::TextureUnitStateIterator tusIter = onePass->getTextureUnitStateIterator();
						while (tusIter.hasMoreElements()) {
							Ogre::TextureUnitState* oneTus = tusIter.getNext();
							Ogre::String texName = oneTus->getTextureName();
							Ogre::TexturePtr texP = (Ogre::TexturePtr)Ogre::TextureManager::getSingleton().getByName(texName);
							if (!texP.isNull()) {
								// if (texP.useCount() <= 1) {
									texP->unload();
									LG::IncStat(LG::StatCullTexturesUnloaded);
									// LG::Log("unloadTheMesh: unloading texture %s", texName.c_str());
								// }
							}
						}
					}
				}
			}
		}
	}
	if (m_shouldCullMeshes) {
		LG::OLMeshTracker::Instance()->MakeUnLoaded(meshP->getName(), Ogre::String(), NULL);
		LG::IncStat(LG::StatCullMeshesUnloaded);
		// LG::Log("unloadTheMesh: unloading mesh %s", mshName.c_str());
	}
}

	void BtOgreSoftBody::updateOgreMesh()
	{
		Ogre::Node *ogreNode = mEntity->getParentNode();
		
		//printf("updateOgreMesh %d %s %s\n", internalId, mEntity->getName().c_str(), ogreNode->getName().c_str());
		
		Ogre::MeshPtr mesh = mEntity->getMesh();
		Ogre::Mesh::SubMeshIterator subMeshI = mesh->getSubMeshIterator();
		Ogre::SubMesh* subMesh = NULL;
		
		Ogre::VertexData* vData = NULL;
		Ogre::VertexDeclaration* vDeclaration = NULL;
		const Ogre::VertexElement* vPosElement = NULL;
		
		bool isSharedVerticesAdded = false;
		unsigned short bufferIndex = 0;
		Ogre::HardwareVertexBufferSharedPtr vBuffer;
		
		// Can not do arithmetic operations on void*
		unsigned char* lockedMem = NULL;
		float* vPosition;
		
		btSoftBody::tNodeArray& btNodes = mSoftBody->m_nodes;
		//printf("Bullet nodes size %d\n", btNodes.size());
		
		int ogreVertexIdx = 0;
		
		while (subMeshI.hasMoreElements()) {
			subMesh = subMeshI.getNext();
			
			if (subMesh->useSharedVertices) {
				
				if (isSharedVerticesAdded) {
					continue;
				}
				
				vData = mesh->sharedVertexData;
				
				// We need to add shared vertices only once
				isSharedVerticesAdded = true;
			} else  {
				vData = subMesh->vertexData;
			}
			
			vDeclaration = vData->vertexDeclaration;
			vPosElement = vDeclaration->findElementBySemantic(Ogre::VES_POSITION);
			
			bufferIndex = vPosElement->getSource();
			vBuffer = vData->vertexBufferBinding->getBuffer(bufferIndex);
			
			// Lock the buffer before reading from it
			lockedMem = static_cast<unsigned char*>(vBuffer->lock(Ogre::HardwareBuffer::HBL_DISCARD));
			
			// Read each vertex
			for (unsigned int i = 0; i < vData->vertexCount; ++i) {
				vPosElement->baseVertexPointerToElement(lockedMem, &vPosition);
				
				int idx = getBulletIndex(ogreVertexIdx);
				
				*vPosition++ = btNodes[idx].m_x.x();
				*vPosition++ = btNodes[idx].m_x.y();
				*vPosition = btNodes[idx++].m_x.z();
				
				// Point to the next vertex
				lockedMem += vBuffer->getVertexSize();
				
				ogreVertexIdx++;
			}
			
			vBuffer->unlock();
		}
				
		btTransform transform = mSoftBody->getWorldTransform();
		btQuaternion rot = transform.getRotation();
	    ogreNode->setOrientation(rot.w(), rot.x(), rot.y(), rot.z());
	    btVector3 pos = transform.getOrigin();
	    ogreNode->setPosition(pos.x(), pos.y(), pos.z());
		
	}

void MeshUtils::meshBuffersToArrays(const Ogre::MeshPtr& mesh, Ogre::Vector3* vertices, unsigned long* indices)
{
	bool added_shared = false;
	size_t current_offset = 0;
	size_t shared_offset = 0;
	size_t next_offset = 0;
	size_t index_offset = 0;

	//const Ogre::Vector3 &position = ent->getParentNode()->_getDerivedPosition();
	//const Ogre::Quaternion &orient = ent->getParentNode()->_getDerivedOrientation();
	//const Ogre::Vector3 &scale = ent->getParentNode()->_getDerivedScale();

	const Ogre::Vector3 &position = Ogre::Vector3::ZERO;
	const Ogre::Quaternion &orient = Ogre::Quaternion::IDENTITY;
	const Ogre::Vector3 &scale = Ogre::Vector3::UNIT_SCALE;

	Ogre::Mesh::SubMeshIterator itr = mesh->getSubMeshIterator();
	while (itr.hasMoreElements()) {
			Ogre::SubMesh* submesh = itr.getNext();

			Ogre::VertexData* vertex_data = submesh->useSharedVertices ? mesh->sharedVertexData : submesh->vertexData;

			if ((!submesh->useSharedVertices) || (submesh->useSharedVertices && !added_shared)) {
					if (submesh->useSharedVertices) {
							added_shared = true;
							shared_offset = current_offset;
						}

					const Ogre::VertexElement* posElem =
					    vertex_data->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);

					Ogre::HardwareVertexBufferSharedPtr vbuf =
					    vertex_data->vertexBufferBinding->getBuffer(posElem->getSource());

					unsigned char* vertex =
					    static_cast<unsigned char*> (vbuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));

					// There is _no_ baseVertexPointerToElement() which takes an Ogre::Real or a double
					//  as second argument. So make it float, to avoid trouble when Ogre::Real will
					//  be comiled/typedefed as double:
					//      Ogre::Real* pReal;
					float* pReal;

					for (size_t k = 0; k < vertex_data->vertexCount; ++k, vertex += vbuf->getVertexSize()) {
							posElem->baseVertexPointerToElement(vertex, &pReal);

							Ogre::Vector3 pt(pReal[0], pReal[1], pReal[2]);

							vertices[current_offset + k] = (orient * (pt * scale)) + position;
							//vertices[current_offset + k] = pt;
						}

					vbuf->unlock();
					next_offset += vertex_data->vertexCount;
				}


			Ogre::IndexData* index_data = submesh->indexData;
			size_t numTris = index_data->indexCount / 3;
			Ogre::HardwareIndexBufferSharedPtr ibuf = index_data->indexBuffer;

			bool use32bitindexes = (ibuf->getType() == Ogre::HardwareIndexBuffer::IT_32BIT);

			unsigned long* pLong = static_cast<unsigned long*> (ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
			unsigned short* pShort = reinterpret_cast<unsigned short*> (pLong);


			size_t offset = (submesh->useSharedVertices) ? shared_offset : current_offset;

			if (use32bitindexes) {
					for (size_t k = 0; k < numTris * 3; ++k) {
							indices[index_offset++] = pLong[k] + static_cast<unsigned long> (offset);
						}
				} else {
					for (size_t k = 0; k < numTris * 3; ++k) {
							indices[index_offset++] = static_cast<unsigned long> (pShort[k]) +
							                          static_cast<unsigned long> (offset);
						}
				}

			ibuf->unlock();
			current_offset = next_offset;
		}
}

bool ModelBackgroundLoader::poll(const TimeFrame& timeFrame)
{
#if OGRE_THREAD_SUPPORT
	if (mState == LS_UNINITIALIZED) {
		//Start to load the meshes
		for (SubModelDefinitionsStore::const_iterator I_subModels = mModel.getDefinition()->getSubModelDefinitions().begin(); I_subModels != mModel.getDefinition()->getSubModelDefinitions().end(); ++I_subModels) {
			Ogre::MeshPtr meshPtr = static_cast<Ogre::MeshPtr> (Ogre::MeshManager::getSingleton().getByName((*I_subModels)->getMeshName()));
			if (meshPtr.isNull() || !meshPtr->isPrepared()) {
				try {
					Ogre::BackgroundProcessTicket ticket = Ogre::ResourceBackgroundQueue::getSingleton().prepare(Ogre::MeshManager::getSingleton().getResourceType(), (*I_subModels)->getMeshName(), Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, false, 0, 0, createListener());
					if (ticket) {
						addTicket(ticket);
					}
				} catch (const std::exception& ex) {
					S_LOG_FAILURE("Could not load the mesh " << (*I_subModels)->getMeshName() << " when loading model " << mModel.getName() << "." << ex);
					continue;
				}
			}
		}
		mState = LS_MESH_PREPARING;
		return poll(timeFrame);
	} else if (mState == LS_MESH_PREPARING) {
		if (areAllTicketsProcessed()) {
			mState = LS_MESH_PREPARED;
			return poll(timeFrame);
		}
	} else if (mState == LS_MESH_PREPARED) {
		for (SubModelDefinitionsStore::const_iterator I_subModels = mModel.getDefinition()->getSubModelDefinitions().begin(); I_subModels != mModel.getDefinition()->getSubModelDefinitions().end(); ++I_subModels) {
			Ogre::MeshPtr meshPtr = static_cast<Ogre::MeshPtr> (Ogre::MeshManager::getSingleton().getByName((*I_subModels)->getMeshName()));
			if (!meshPtr.isNull()) {
				if (!meshPtr->isLoaded()) {
#if OGRE_THREAD_SUPPORT == 1
					Ogre::BackgroundProcessTicket ticket = Ogre::ResourceBackgroundQueue::getSingleton().load(Ogre::MeshManager::getSingleton().getResourceType(), meshPtr->getName(), Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, false, 0, 0, createListener());
					if (ticket) {
						//						meshPtr->setBackgroundLoaded(true);
						addTicket(ticket);
					}
#else
					if (!timeFrame.isTimeLeft()) {
						return false;
					}
					try {
						meshPtr->load();
					} catch (const std::exception& ex) {
						S_LOG_FAILURE("Could not load the mesh " << meshPtr->getName() << " when loading model " << mModel.getName() << "." << ex);
						continue;
					}
#endif
				}
			}
		}
		mState = LS_MESH_LOADING;
		return poll(timeFrame);
	} else if (mState == LS_MESH_LOADING) {
		if (areAllTicketsProcessed()) {
			mState = LS_MESH_LOADED;
			return poll(timeFrame);
		}
	} else if (mState == LS_MESH_LOADED) {

		for (SubModelDefinitionsStore::const_iterator I_subModels = mModel.getDefinition()->getSubModelDefinitions().begin(); I_subModels != mModel.getDefinition()->getSubModelDefinitions().end(); ++I_subModels) {
			Ogre::MeshPtr meshPtr = static_cast<Ogre::MeshPtr> (Ogre::MeshManager::getSingleton().getByName((*I_subModels)->getMeshName()));
			if (!meshPtr.isNull()) {
				if (meshPtr->isLoaded()) {
					Ogre::Mesh::SubMeshIterator subMeshI = meshPtr->getSubMeshIterator();
					while (subMeshI.hasMoreElements()) {
						Ogre::SubMesh* submesh(subMeshI.getNext());
						Ogre::MaterialPtr materialPtr = static_cast<Ogre::MaterialPtr> (Ogre::MaterialManager::getSingleton().getByName(submesh->getMaterialName()));
						if (materialPtr.isNull() || !materialPtr->isPrepared()) {
//							S_LOG_VERBOSE("Preparing material " << materialPtr->getName());
							Ogre::BackgroundProcessTicket ticket = Ogre::ResourceBackgroundQueue::getSingleton().prepare(Ogre::MaterialManager::getSingleton().getResourceType(),submesh->getMaterialName(), Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, false, 0, 0, createListener());
							if (ticket) {
								addTicket(ticket);
							}
						}
					}
				}
			}
			for (PartDefinitionsStore::const_iterator I_parts = (*I_subModels)->getPartDefinitions().begin(); I_parts != (*I_subModels)->getPartDefinitions().end(); ++I_parts) {
				if ((*I_parts)->getSubEntityDefinitions().size() > 0) {
					for (SubEntityDefinitionsStore::const_iterator I_subEntities = (*I_parts)->getSubEntityDefinitions().begin(); I_subEntities != (*I_parts)->getSubEntityDefinitions().end(); ++I_subEntities) {
						const std::string& materialName = (*I_subEntities)->getMaterialName();
						if (materialName != "") {
							Ogre::MaterialPtr materialPtr = static_cast<Ogre::MaterialPtr> (Ogre::MaterialManager::getSingleton().getByName(materialName));
							if (materialPtr.isNull() || !materialPtr->isPrepared()) {
//								S_LOG_VERBOSE("Preparing material " << materialName);
								Ogre::BackgroundProcessTicket ticket = Ogre::ResourceBackgroundQueue::getSingleton().prepare(Ogre::MaterialManager::getSingleton().getResourceType(), materialName, Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, false, 0, 0, createListener());
								if (ticket) {
									addTicket(ticket);
								}
							}
						}
					}
				}
			}
		}

		mState = LS_MATERIAL_PREPARING;
		return poll(timeFrame);
	} else if (mState == LS_MATERIAL_PREPARING) {
//.........这里部分代码省略.........