C++ MeshPtr::load方法代码示例

void ESKOgre::createFakeEntity(Ogre::SceneManager *mSceneMgr) {
	Ogre::MeshPtr msh = Ogre::MeshManager::getSingleton().createManual(name + "_skeleton", XENOVIEWER_RESOURCE_GROUP);
	msh->setSkeletonName(name);

	Ogre::SubMesh* sub = msh->createSubMesh();
	const size_t nVertices = 3;
	const size_t nVertCount = 3;
	const size_t vbufCount = nVertCount*nVertices;
	float *vertices = (float *)malloc(sizeof(float)*vbufCount);

	for (size_t i = 0; i < nVertices; i++) {
		vertices[i*nVertCount] = 0.0;
		vertices[i*nVertCount + 1] = 0.0;
		vertices[i*nVertCount + 2] = 0.0;
	}

	const size_t ibufCount = 3;
	unsigned short *faces = (unsigned short *)malloc(sizeof(unsigned short) * ibufCount);

	for (size_t i = 0; i < ibufCount; i++) {
		faces[i] = i;
	}

	msh->sharedVertexData = new Ogre::VertexData();
	msh->sharedVertexData->vertexCount = nVertices;

	Ogre::VertexDeclaration* decl = msh->sharedVertexData->vertexDeclaration;
	size_t offset = 0;

	decl->addElement(0, offset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
	offset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);

	Ogre::HardwareVertexBufferSharedPtr vbuf = Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(offset, msh->sharedVertexData->vertexCount, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
	vbuf->writeData(0, vbuf->getSizeInBytes(), vertices, true);
	Ogre::VertexBufferBinding* bind = msh->sharedVertexData->vertexBufferBinding;
	bind->setBinding(0, vbuf);
	Ogre::HardwareIndexBufferSharedPtr ibuf = Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(Ogre::HardwareIndexBuffer::IT_16BIT, ibufCount, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
	ibuf->writeData(0, ibuf->getSizeInBytes(), faces, true);
	sub->useSharedVertices = true;
	sub->indexData->indexBuffer = ibuf;
	sub->indexData->indexCount = ibufCount;
	sub->indexData->indexStart = 0;

	msh->_setBounds(Ogre::AxisAlignedBox(-100, -100, -100, 100, 100, 100));
	msh->_setBoundingSphereRadius(100);
	msh->load();

	free(faces);
	free(vertices);

	skeleton_entity = mSceneMgr->createEntity(name + "_skeleton");
	skeleton_node = mSceneMgr->getRootSceneNode()->createChildSceneNode();
	skeleton_node->attachObject(skeleton_entity);
	skeleton_node->setVisible(false);
}

Ogre::SceneNode *TutorialApplication::loadBSP(std::shared_ptr<l2p::UModel> m, bool ignoreNonVisible) {
  l2p::Name name = m->package->name;
  std::vector<float> vertex_data;
  std::vector<uint32_t> index_buf;
  l2p::Box bounds;

  // Build vertex and index buffer.
  for (auto ni = m->nodes.begin(), ne = m->nodes.end(); ni != ne; ++ni) {
    l2p::BSPNode &n = *ni;
    l2p::BSPSurface &s = m->surfaces[n.surface];

    if (ignoreNonVisible && ignoreNode(m.get(), n, s))
      continue;

    uint32_t vert_start = vertex_data.size() / 8;

    const Ogre::Vector3 uvec = ogre_cast(m->vectors[s.U]);
    const Ogre::Vector3 vvec = ogre_cast(m->vectors[s.V]);
    const Ogre::Vector3 base = ogre_cast(m->points[s.base]);
    int usize = 0;
    int vsize = 0;
    std::shared_ptr<l2p::UTexture> mat = s.material;
    if (mat) {
      usize = mat->USize;
      vsize = mat->VSize;
    }

    if (usize == 0 || vsize == 0)
      usize = vsize = 64;

    // Vertex buffer.
    if (n.num_verticies > 0) {
      l2p::Vector Normal = m->vectors[s.normal];

      for (uint32_t vert_index = 0; vert_index < n.num_verticies; ++vert_index) {
        const l2p::Vector &pos = m->points[m->vertexes[n.vert_pool + vert_index].vertex];
        const Ogre::Vector3 dist(ogre_cast(pos) - base);
        const Ogre::Vector2 tcoord((dist | uvec) / float(usize), (dist | vvec) / float(vsize));
        bounds += pos;
        vertex_data.push_back(pos.X);
        vertex_data.push_back(pos.Y);
        vertex_data.push_back(pos.Z);
        vertex_data.push_back(Normal.X);
        vertex_data.push_back(Normal.Y);
        vertex_data.push_back(Normal.Z);
        vertex_data.push_back(tcoord.x);
        vertex_data.push_back(tcoord.y);
      }

      if (s.flags & l2p::PF_TwoSided) {
        for (uint32_t vert_index = 0; vert_index < n.num_verticies; ++vert_index) {
          const l2p::Vector &pos = m->points[m->vertexes[n.vert_pool + vert_index].vertex];
          const Ogre::Vector3 dist(ogre_cast(pos) - base);
          const Ogre::Vector2 tcoord((dist | uvec) / float(usize), (dist | vvec) / float(vsize));
          vertex_data.push_back(pos.X);
          vertex_data.push_back(pos.Y);
          vertex_data.push_back(pos.Z);
          vertex_data.push_back(Normal.X);
          vertex_data.push_back(Normal.Y);
          vertex_data.push_back(-Normal.Z);
          vertex_data.push_back(tcoord.x);
          vertex_data.push_back(tcoord.y);
        }
      }
    }

    // Index buffer.
    for (int verti = 2; verti < n.num_verticies; ++verti) {
      index_buf.push_back(vert_start);
      index_buf.push_back(vert_start + verti - 1);
      index_buf.push_back(vert_start + verti);
    }
    if (s.flags & l2p::PF_TwoSided) {
      for (int verti = 2; verti < n.num_verticies; ++verti) {
        index_buf.push_back(vert_start);
        index_buf.push_back(vert_start + verti);
        index_buf.push_back(vert_start + verti - 1);
      }
    }
  }

  if (vertex_data.size() == 0 || index_buf.size() == 0)
    return nullptr;

  Ogre::MeshPtr mesh = Ogre::MeshManager::getSingleton().createManual(Ogre::String(name) + Ogre::String(m->name), "General");
  Ogre::VertexData  *data = new Ogre::VertexData();
  mesh->sharedVertexData = data;
  data->vertexCount = vertex_data.size() / 8;

  Ogre::VertexDeclaration *decl = data->vertexDeclaration;
  uint32_t offset = 0;
  decl->addElement(0, offset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
  offset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);
  decl->addElement(0, offset, Ogre::VET_FLOAT3, Ogre::VES_NORMAL);
  offset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);
  decl->addElement(0, offset, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES);
  offset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT2);

  Ogre::HardwareVertexBufferSharedPtr vbuf =
    Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
//.........这里部分代码省略.........

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.........

//.........这里部分代码省略.........
	ManualObject->position(1, 1, 1);
	ManualObject->triangle(18, 19, 20);

	ManualObject->position(1, 0, 0);
	ManualObject->position(1, 1, 1);
	ManualObject->position(1, 0, 1);
	ManualObject->triangle(21, 22, 23);
	//face 5
	ManualObject->position(0, 1, 0);
	ManualObject->position(1, 1, 0);
	ManualObject->position(0, 1, 1);
	ManualObject->triangle(24, 25, 26);

	ManualObject->position(1, 1, 0);
	ManualObject->position(1, 1, 1);
	ManualObject->position(0, 1, 1);
	ManualObject->triangle(27, 28, 29);
	
	//face 6
	ManualObject->position(0, 0, 0);
	ManualObject->position(0, 1, 1);
	ManualObject->position(0, 0, 1);
	ManualObject->triangle(30, 31, 32);

	ManualObject->position(0, 0, 0);
	ManualObject->position(0, 1, 0);
	ManualObject->position(0, 1, 1);
	ManualObject->triangle(33, 34, 35);

	ManualObject->end();
	Ogre::MeshPtr MeshPtr = ManualObject->convertToMesh("Animation");
	Ogre::SubMesh* sub = MeshPtr->getSubMesh(0);
	
	Ogre::SkeletonPtr Skeleton = Ogre::SkeletonManager::getSingleton().create("Skeleton", Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
	MeshPtr.getPointer()->_notifySkeleton(Skeleton);
	Ogre::Bone *Root1 = NULL;
	Ogre::Bone *Child1 = NULL;
	Ogre::Bone *Child2 = NULL;

	Root1 = Skeleton.getPointer()->createBone("Root");
	Root1->setPosition(Ogre::Vector3(0.0, 0.0, 0.0));
	Root1->setOrientation(Ogre::Quaternion::IDENTITY);
	
	Child1 = Root1->createChild(1);
	Child1->setPosition(Ogre::Vector3(4.0, 0.0, 0.0));
	Child1->setOrientation(Ogre::Quaternion::IDENTITY);
	Child2 = Root1->createChild(2);
	Child2->setPosition(Ogre::Vector3(5.0, 0.0, 0.0));
	Child2->setOrientation(Ogre::Quaternion::IDENTITY);

	Ogre::VertexBoneAssignment Assignment;

	Assignment.boneIndex = 0;
	Assignment.vertexIndex = 0;
	Assignment.weight = 1.0;
	Skeleton->setBindingPose();

	sub->addBoneAssignment(Assignment);

	Assignment.vertexIndex = 1;
	sub->addBoneAssignment(Assignment);

	Assignment.vertexIndex = 2;
	sub->addBoneAssignment(Assignment);

	Ogre::Animation *Animation = MeshPtr->createAnimation("HandAnimation", 100.0);
	Ogre::NodeAnimationTrack *Track = Animation->createNodeTrack(0, Root1);
	Ogre::TransformKeyFrame *KeyFrame = NULL;

	for (float FrameTime = 0.0; FrameTime < 100.0; FrameTime += 0.1)
	{
		KeyFrame = Track->createNodeKeyFrame(FrameTime);
		KeyFrame->setTranslate(Ogre::Vector3(10.0, 0.0, 0.0));
	}

	Root1->setManuallyControlled(true);
	Child1->setManuallyControlled(true);
	Child2->setManuallyControlled(true);
	MeshPtr->load();

	MeshPtr.getPointer()->_notifySkeleton(Skeleton);
		
//	Ogre::SkeletonSerializer skeletonSerializer;
//	skeletonSerializer.exportSkeleton(Skeleton.get(), "C:\\Users\\Ilya\\Documents\\Visual Studio 2010\\Projects\\Recipes\\media\\models\\testskeleton.skeleton");
//	Ogre::MeshSerializer ser;
//    ser.exportMesh(MeshPtr.get(), "C:\\Users\\Ilya\\Documents\\Visual Studio 2010\\Projects\\Recipes\\media\\models\\testskeleton.mesh");

	Ogre::Entity *Entity = SceneManager->createEntity("Animation", "Animation"/*"testskeleton.mesh"*/);
	Ogre::SceneNode *SceneNode = SceneManager->getRootSceneNode()->createChildSceneNode();
	SceneNode->attachObject(Entity);
	Entity->setDisplaySkeleton(true);

	m_AnimationState = Entity->getAnimationState("HandAnimation");
	m_AnimationState->setEnabled(true);
	m_AnimationState->setLoop(true);
	
	m_Camera->setPolygonMode(Ogre::PolygonMode::PM_WIREFRAME);
	 
	Root->renderOneFrame();
}

//.........这里部分代码省略.........
            size_t offset = 0;
            mesh->sharedVertexData->vertexDeclaration->addElement(0, offset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
            offset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);
            mesh->sharedVertexData->vertexDeclaration->addElement(0, offset, Ogre::VET_FLOAT3, Ogre::VES_TEXTURE_COORDINATES);

            // Create and bind vertex buffer
            mesh->sharedVertexData->vertexCount = 14;
            Ogre::HardwareVertexBufferSharedPtr vertexBuffer =
                Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
                    mesh->sharedVertexData->vertexDeclaration->getVertexSize(0),
                    mesh->sharedVertexData->vertexCount,
                    Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
            mesh->sharedVertexData->vertexBufferBinding->setBinding(0, vertexBuffer);

            // Vertex data
            static const float vertexData[] = {
                // Position      Texture coordinates    // Index
                0.0, 2.0, -1.0, 1.0, 1.0, //  0
                0.0, 1.0, -1.0, -1.0, 1.0, //  1
                1.0, 2.0, -1.0, 1.0, -1.0, //  2
                1.0, 1.0, -1.0, -1.0, -1.0, //  3
                2.0, 2.0, 1.0, 1.0, -1.0, //  4
                2.0, 1.0, 1.0, -1.0, -1.0, //  5
                3.0, 2.0, 1.0, 1.0, 1.0, //  6
                3.0, 1.0, 1.0, -1.0, 1.0, //  7
                4.0, 2.0, -1.0, 1.0, 1.0, //  8
                4.0, 1.0, -1.0, -1.0, 1.0, //  9
                1.0, 3.0, -1.0, 1.0, 1.0, // 10
                2.0, 3.0, 1.0, 1.0, 1.0, // 11
                1.0, 0.0, -1.0, -1.0, 1.0, // 12
                2.0, 0.0, 1.0, -1.0, 1.0, // 13
            };

            // Fill vertex buffer
            float* pData = static_cast<float*>(vertexBuffer->lock(Ogre::HardwareBuffer::HBL_DISCARD));
            for (size_t vertex = 0, i = 0; vertex < mesh->sharedVertexData->vertexCount; vertex++)
            {
                // Position
                *pData++ = position.x + scale * vertexData[i++];
                *pData++ = position.y + scale * vertexData[i++];
                *pData++ = 0.0;

                // Texture coordinates
                *pData++ = vertexData[i++];
                *pData++ = vertexData[i++];
                *pData++ = vertexData[i++];
            }
            vertexBuffer->unlock();

            // Create index buffer
            sub->indexData->indexCount = 36;
            Ogre::HardwareIndexBufferSharedPtr indexBuffer =
                Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(
                    Ogre::HardwareIndexBuffer::IT_16BIT,
                    sub->indexData->indexCount,
                    Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
            sub->indexData->indexBuffer = indexBuffer;

            // Index data
            static const Ogre::uint16 indexData[] = {
                // Indices         // Face
                 0,  1,  2,        //  0
                 2,  1,  3,        //  1
                 2,  3,  4,        //  2
                 4,  3,  5,        //  3
                 4,  5,  6,        //  4
                 6,  5,  7,        //  5
                 6,  7,  8,        //  6
                 8,  7,  9,        //  7
                10,  2, 11,        //  8
                11,  2,  4,        //  9
                 3, 12,  5,        // 10
                 5, 12, 13,        // 11
            };

            // Fill index buffer
            indexBuffer->writeData(0, indexBuffer->getSizeInBytes(), indexData, true);

            mesh->_setBounds(Ogre::AxisAlignedBox::BOX_INFINITE);
            mesh->_setBoundingSphereRadius(10);
            mesh->load();

            Ogre::Entity* e = gEnv->sceneManager->createEntity(mesh->getName());
            e->setCastShadows(false);
            e->setRenderQueueGroup(Ogre::RENDER_QUEUE_OVERLAY - 1);
            e->setVisible(true);

            e->setMaterialName("tracks/EnvMapDebug");
            Ogre::SceneNode* mDebugSceneNode = new Ogre::SceneNode(gEnv->sceneManager);
            mDebugSceneNode->attachObject(e);
            mDebugSceneNode->setPosition(Ogre::Vector3(0, 0, -5));
            mDebugSceneNode->setFixedYawAxis(true, Ogre::Vector3::UNIT_Y);
            mDebugSceneNode->setVisible(true);
            mDebugSceneNode->_update(true, true);
            mDebugSceneNode->_updateBounds();
            overlay->add3D(mDebugSceneNode);
            overlay->show();
        }
    }
}

void GeometryFactory::generateSphericDome (const Ogre::String &name, int segments, DomeType type) {
    // Return now if already exists
    if (Ogre::MeshManager::getSingleton ().resourceExists (name)) {
        return;
    }

    Ogre::LogManager::getSingleton ().logMessage (
        "Caelum: Creating " + name + " sphere mesh resource...");

    // Use the mesh manager to create the mesh
    Ogre::MeshPtr msh = Ogre::MeshManager::getSingleton ().createManual (name, RESOURCE_GROUP_NAME);
    // Create a submesh
    Ogre::SubMesh *sub = msh->createSubMesh ();

    // Create the shared vertex data
    Ogre::VertexData *vertexData = new Ogre::VertexData ();
    msh->sharedVertexData = vertexData;

    // Define the vertices' format
    Ogre::VertexDeclaration *vertexDecl = vertexData->vertexDeclaration;
    size_t currOffset = 0;
    // Position
    vertexDecl->addElement (0, currOffset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
    currOffset += Ogre::VertexElement::getTypeSize (Ogre::VET_FLOAT3);
    // Normal
    vertexDecl->addElement (0, currOffset, Ogre::VET_FLOAT3, Ogre::VES_NORMAL);
    currOffset += Ogre::VertexElement::getTypeSize (Ogre::VET_FLOAT3);
    // Texture coordinates
    vertexDecl->addElement (0, currOffset, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES, 0);
    currOffset += Ogre::VertexElement::getTypeSize (Ogre::VET_FLOAT2);

    // Allocate the vertex buffer
    switch (type) {
    case DT_GRADIENTS:
        vertexData->vertexCount = segments * (segments - 1) + 2;
        break;
    case DT_STARFIELD:
        vertexData->vertexCount = (segments + 1) * (segments + 1);
        break;
    };
    Ogre::HardwareVertexBufferSharedPtr vBuf = Ogre::HardwareBufferManager::getSingleton ().createVertexBuffer (vertexDecl->getVertexSize (0), vertexData->vertexCount, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY, false);
    Ogre::VertexBufferBinding *binding = vertexData->vertexBufferBinding;
    binding->setBinding (0, vBuf);

    float *pVertex = static_cast<float *>(vBuf->lock (Ogre::HardwareBuffer::HBL_DISCARD));

    // Allocate the index buffer
    switch (type) {
    case DT_GRADIENTS:
        sub->indexData->indexCount = 2 * segments * (segments - 1) * 3;
        break;
    case DT_STARFIELD:
        sub->indexData->indexCount = 2 * (segments - 1) * segments * 3;
        break;
    };
    sub->indexData->indexBuffer = Ogre::HardwareBufferManager::getSingleton ().createIndexBuffer (Ogre::HardwareIndexBuffer::IT_16BIT, sub->indexData->indexCount, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY, false);
    Ogre::HardwareIndexBufferSharedPtr iBuf = sub->indexData->indexBuffer;
    unsigned short *pIndices = static_cast<unsigned short *>(iBuf->lock (Ogre::HardwareBuffer::HBL_DISCARD));

    // Fill the buffers
    switch (type) {
    case DT_GRADIENTS:
        fillGradientsDomeBuffers (pVertex, pIndices, segments);
        break;
    case DT_STARFIELD:
        fillStarfieldDomeBuffers (pVertex, pIndices, segments);
        break;
    };

    // Close the vertex buffer
    vBuf->unlock ();

    // Close the index buffer
    iBuf->unlock ();

    // Finishing it...
    sub->useSharedVertices = true;
    msh->_setBounds (Ogre::AxisAlignedBox (-1, -1, -1, 1, 1, 1), false);
    msh->_setBoundingSphereRadius (1);
    msh->load ();

    Ogre::LogManager::getSingleton ().logMessage (
        "Caelum: generateSphericDome DONE");
}

//.........这里部分代码省略.........
            100.0,100.0,100.0,          //5 position
            sqrt13,sqrt13,sqrt13,       //5 normal
            100.0,-100.0,100.0,         //6 position
            sqrt13,-sqrt13,sqrt13,      //6 normal
            -100.0,-100.0,100.0,        //7 position
            -sqrt13,-sqrt13,sqrt13,     //7 normal
    };
 
    RenderSystem* rs = Root::getSingleton().getRenderSystem();
    RGBA colours[nVertices];
    RGBA *pColour = colours;
    // Use render system to convert colour value since colour packing varies
    rs->convertColourValue(ColourValue(1.0,0.0,0.0), pColour++); //0 colour
    rs->convertColourValue(ColourValue(1.0,1.0,0.0), pColour++); //1 colour
    rs->convertColourValue(ColourValue(0.0,1.0,0.0), pColour++); //2 colour
    rs->convertColourValue(ColourValue(0.0,0.0,0.0), pColour++); //3 colour
    rs->convertColourValue(ColourValue(1.0,0.0,1.0), pColour++); //4 colour
    rs->convertColourValue(ColourValue(1.0,1.0,1.0), pColour++); //5 colour
    rs->convertColourValue(ColourValue(0.0,1.0,1.0), pColour++); //6 colour
    rs->convertColourValue(ColourValue(0.0,0.0,1.0), pColour++); //7 colour
 
    /// Define 12 triangles (two triangles per cube face)
    /// The values in this table refer to vertices in the above table
    const size_t ibufCount = 36;
    unsigned short faces[ibufCount] = {
            0,2,3,
            0,1,2,
            1,6,2,
            1,5,6,
            4,6,5,
            4,7,6,
            0,7,4,
            0,3,7,
            0,5,1,
            0,4,5,
            2,7,3,
            2,6,7
    };
 
    /// Create vertex data structure for 8 vertices shared between submeshes
    msh->sharedVertexData = new VertexData();
    msh->sharedVertexData->vertexCount = nVertices;
 
    /// Create declaration (memory format) of vertex data
    VertexDeclaration* decl = msh->sharedVertexData->vertexDeclaration;
    size_t offset = 0;
    // 1st buffer
    decl->addElement(0, offset, VET_FLOAT3, VES_POSITION);
    offset += VertexElement::getTypeSize(VET_FLOAT3);
    decl->addElement(0, offset, VET_FLOAT3, VES_NORMAL);
    offset += VertexElement::getTypeSize(VET_FLOAT3);
    /// Allocate vertex buffer of the requested number of vertices (vertexCount) 
    /// and bytes per vertex (offset)
    HardwareVertexBufferSharedPtr vbuf = 
        HardwareBufferManager::getSingleton().createVertexBuffer(
        offset, msh->sharedVertexData->vertexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
    /// Upload the vertex data to the card
    vbuf->writeData(0, vbuf->getSizeInBytes(), vertices, true);
 
    /// Set vertex buffer binding so buffer 0 is bound to our vertex buffer
    VertexBufferBinding* bind = msh->sharedVertexData->vertexBufferBinding; 
    bind->setBinding(0, vbuf);
 
    // 2nd buffer
    offset = 0;
    decl->addElement(1, offset, VET_COLOUR, VES_DIFFUSE);
    offset += VertexElement::getTypeSize(VET_COLOUR);
    /// Allocate vertex buffer of the requested number of vertices (vertexCount) 
    /// and bytes per vertex (offset)
    vbuf = HardwareBufferManager::getSingleton().createVertexBuffer(
        offset, msh->sharedVertexData->vertexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
    /// Upload the vertex data to the card
    vbuf->writeData(0, vbuf->getSizeInBytes(), colours, true);
 
    /// Set vertex buffer binding so buffer 1 is bound to our colour buffer
    bind->setBinding(1, vbuf);
 
    /// Allocate index buffer of the requested number of vertices (ibufCount) 
    HardwareIndexBufferSharedPtr ibuf = HardwareBufferManager::getSingleton().
        createIndexBuffer(
        HardwareIndexBuffer::IT_16BIT, 
        ibufCount, 
        HardwareBuffer::HBU_STATIC_WRITE_ONLY);
 
    /// Upload the index data to the card
    ibuf->writeData(0, ibuf->getSizeInBytes(), faces, true);
 
    /// Set parameters of the submesh
    sub->useSharedVertices = true;
    sub->indexData->indexBuffer = ibuf;
    sub->indexData->indexCount = ibufCount;
    sub->indexData->indexStart = 0;
 
    /// Set bounding information (for culling)
    msh->_setBounds(AxisAlignedBox(-100,-100,-100,100,100,100));
    msh->_setBoundingSphereRadius(Math::Sqrt(3*100*100));
 
    /// Notify -Mesh object that it has been loaded
    msh->load();
}

void World::LoadSceneFile(string sceneFile)
{

    Ogre::LogManager::getSingleton().setLogDetail(Ogre::LL_LOW);
    Ogre::SceneNode* worldNode = m_sceneMgr->getRootSceneNode()->createChildSceneNode();
    worldNode->rotate(Ogre::Vector3::UNIT_X, Ogre::Degree(-90.0f));

    string meshName;
    float fDrawDistance;
    bool bIsLod;
    Ogre::Vector3 position;
    Ogre::Quaternion rotation;

    ifstream sceneStream(sceneFile);
    // skip the title and the table title of the file
    string strline;

    int i = 0;
    while (!sceneStream.eof())
    {
        getline(sceneStream, strline);

        if (strline.length() == 0)
            continue;

        std::istringstream ss(strline);
        std::string token;

        getline(ss, token, ',');
        boost::trim(token);
        meshName = token;

        getline(ss, token, ',');
        boost::trim(token);
        fDrawDistance = lexical_cast<float>(token);

        getline(ss, token, ',');
        boost::trim(token);
        bIsLod = lexical_cast<bool>(token);

        getline(ss, token, ',');
        boost::trim(token);
        position.x = lexical_cast<float>(token);
        getline(ss, token, ',');
        boost::trim(token);
        position.y = lexical_cast<float>(token);
        getline(ss, token, ',');
        boost::trim(token);
        position.z = lexical_cast<float>(token);

        getline(ss, token, ',');
        boost::trim(token);
        rotation.w = lexical_cast<float>(token);
        getline(ss, token, ',');
        boost::trim(token);
        rotation.x = lexical_cast<float>(token);
        getline(ss, token, ',');
        boost::trim(token);
        rotation.y = lexical_cast<float>(token);
        getline(ss, token, ',');
        boost::trim(token);
        rotation.z = lexical_cast<float>(token);

		
        Ogre::MeshPtr mesh;
		Ogre::Entity* entity;
	
		Ogre::Entity* realEntity = m_sceneMgr->createEntity(meshName);
		
		if (fDrawDistance > 300.0f && !bIsLod)
			continue;
		
        if (bIsLod)
        {
            mesh = Ogre::MeshManager::getSingleton().createManual(meshName + "lod" + std::to_string(i), "General"); // empty mesh
			mesh->createManualLodLevel(0, "NULL");
			mesh->createManualLodLevel(700, meshName);
			mesh->_setBounds( realEntity->getMesh()->getBounds());
			mesh->_setBoundingSphereRadius(realEntity->getMesh()->getBoundingSphereRadius());
			mesh->load();
			entity->setRenderingDistance(fDrawDistance);
			entity = m_sceneMgr->createEntity(mesh->getName());
        }
        else
        {
            mesh = Ogre::MeshManager::getSingleton().getByName(meshName);
			entity = m_sceneMgr->createEntity(meshName);
			entity->setRenderingDistance(fDrawDistance);
        }
        m_sceneMgr->destroyEntity(realEntity);


        Ogre::SceneNode* sceneNode = worldNode->createChildSceneNode();
        sceneNode->attachObject(entity);

        fix_gta_coord(rotation);

        sceneNode->rotate(rotation);
        sceneNode->setPosition(position);
        i++;
//.........这里部分代码省略.........

void TutorialApplication::createSphere(const std::string& strName, const float r, const int nRings, const int nSegments) {
	Ogre::MeshPtr pSphere = Ogre::MeshManager::getSingleton().createManual(Ogre::String(strName), Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
	Ogre::SubMesh *pSphereVertex = pSphere->createSubMesh();
 
	pSphere->sharedVertexData = new Ogre::VertexData();
	Ogre::VertexData* vertexData = pSphere->sharedVertexData;
 
	// define the vertex format
	Ogre::VertexDeclaration* vertexDecl = vertexData->vertexDeclaration;
	size_t currOffset = 0;
	// positions
	vertexDecl->addElement(0, currOffset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
	currOffset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);
	// normals
	vertexDecl->addElement(0, currOffset, Ogre::VET_FLOAT3, Ogre::VES_NORMAL);
	currOffset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);
	// two dimensional texture coordinates
	vertexDecl->addElement(0, currOffset, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES, 0);
	currOffset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT2);
 
	// allocate the vertex buffer
	vertexData->vertexCount = (nRings + 1) * (nSegments+1);
	Ogre::HardwareVertexBufferSharedPtr vBuf = Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(vertexDecl->getVertexSize(0), vertexData->vertexCount, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY, false);
	Ogre::VertexBufferBinding* binding = vertexData->vertexBufferBinding;
	binding->setBinding(0, vBuf);
	float* pVertex = static_cast<float*>(vBuf->lock(Ogre::HardwareBuffer::HBL_DISCARD));
 
	// allocate index buffer
	pSphereVertex->indexData->indexCount = 6 * nRings * (nSegments + 1);
	pSphereVertex->indexData->indexBuffer = Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(Ogre::HardwareIndexBuffer::IT_16BIT, pSphereVertex->indexData->indexCount, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY, false);
	Ogre::HardwareIndexBufferSharedPtr iBuf = pSphereVertex->indexData->indexBuffer;
	unsigned short* pIndices = static_cast<unsigned short*>(iBuf->lock(Ogre::HardwareBuffer::HBL_DISCARD));
 
	float fDeltaRingAngle = (Ogre::Math::PI / nRings);
	float fDeltaSegAngle = (2 * Ogre::Math::PI / nSegments);
	unsigned short wVerticeIndex = 0 ;
 
	// Generate the group of rings for the sphere
	for( int ring = 0; ring <= nRings; ring++ ) {
		float r0 = r * sinf (ring * fDeltaRingAngle);
		float y0 = r * cosf (ring * fDeltaRingAngle);
 
        // Generate the group of segments for the current ring
        for(int seg = 0; seg <= nSegments; seg++) {
			float x0 = r0 * sinf(seg * fDeltaSegAngle);
            float z0 = r0 * cosf(seg * fDeltaSegAngle);
 
            // Add one vertex to the strip which makes up the sphere
            *pVertex++ = x0;
            *pVertex++ = y0;
            *pVertex++ = z0;
 
            Ogre::Vector3 vNormal = Ogre::Vector3(x0, y0, z0).normalisedCopy();
            *pVertex++ = vNormal.x;
            *pVertex++ = vNormal.y;
            *pVertex++ = vNormal.z;
 
            *pVertex++ = (float) seg / (float) nSegments;
            *pVertex++ = (float) ring / (float) nRings;
 
            if (ring != nRings) {
				// each vertex (except the last) has six indices pointing to it
                *pIndices++ = wVerticeIndex + nSegments + 1;
                *pIndices++ = wVerticeIndex;               
                *pIndices++ = wVerticeIndex + nSegments;
                *pIndices++ = wVerticeIndex + nSegments + 1;
                *pIndices++ = wVerticeIndex + 1;
                *pIndices++ = wVerticeIndex;
                wVerticeIndex ++;
            }
        }; // end for seg
    } // end for ring
 
	// Unlock
	vBuf->unlock();
	iBuf->unlock();
	// Generate face list
	pSphereVertex->useSharedVertices = true;
 
    // the original code was missing this line:
    pSphere->_setBounds( Ogre::AxisAlignedBox( Ogre::Vector3(-r, -r, -r), Ogre::Vector3(r, r, r) ), false );
    pSphere->_setBoundingSphereRadius(r);
    // this line makes clear the mesh is loaded (avoids memory leaks)
    pSphere->load();
}