C++ HardwareVertexBufferSharedPtr::writeData方法代码示例

void gfx_decal_init (void)
{
    // TODO: The 4x3 transform will need to be 
    // TODO: Eventually we'd like this uv rect to be configurable per decal.
    Vector2 uv1(0, 0);
    Vector2 uv2(1, 1);

    box_op.operationType = Ogre::RenderOperation::OT_TRIANGLE_LIST;

    Ogre::VertexData *vdata = OGRE_NEW Ogre::VertexData();
    box_op.vertexData = vdata;
    vdata->vertexStart = 0;
    const unsigned vertex_count = 8;
    vdata->vertexCount = vertex_count;
    unsigned vdecl_size = 0;
    // strict alignment required here
    struct Vertex { Vector3 position; Vector2 uv1; Vector2 uv2; };
    vdecl_size += vdata->vertexDeclaration->addElement(
        0, vdecl_size, Ogre::VET_FLOAT3, Ogre::VES_POSITION).getSize();
    vdecl_size += vdata->vertexDeclaration->addElement(
        0, vdecl_size, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES, 0).getSize();
    vdecl_size += vdata->vertexDeclaration->addElement(
        0, vdecl_size, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES, 1).getSize();

    Ogre::HardwareVertexBufferSharedPtr vbuf =
        Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
            vdecl_size, vdata->vertexCount,
            Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE);
    vdata->vertexBufferBinding->setBinding(0, vbuf);
    Vertex vdata_raw[vertex_count] = {
        { Vector3(-0.5, -0.5, -0.5), uv1, uv2 },
        { Vector3(-0.5, -0.5,  0.5), uv1, uv2 },
        { Vector3(-0.5,  0.5, -0.5), uv1, uv2 },
        { Vector3(-0.5,  0.5,  0.5), uv1, uv2 },
        { Vector3( 0.5, -0.5, -0.5), uv1, uv2 },
        { Vector3( 0.5, -0.5,  0.5), uv1, uv2 },
        { Vector3( 0.5,  0.5, -0.5), uv1, uv2 },
        { Vector3( 0.5,  0.5,  0.5), uv1, uv2 }
    };
    vbuf->writeData(vdata->vertexStart, vdata->vertexCount*vdecl_size, vdata_raw, true);

    Ogre::IndexData *idata = OGRE_NEW Ogre::IndexData();
    box_op.indexData = idata;
    box_op.useIndexes = true;
    const unsigned indexes = 36;  // 3 per triangle therefore 6 per face, 6 faces total
    idata->indexStart = 0;
    idata->indexCount = indexes;
    idata->indexBuffer = Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(
        Ogre::HardwareIndexBuffer::IT_16BIT, indexes, Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY);
    uint16_t idata_raw[indexes] = {
        quad_vertexes(2,6,0,4),
        quad_vertexes(7,3,5,1),
        quad_vertexes(3,2,1,0),
        quad_vertexes(6,7,4,5),
        quad_vertexes(0,4,1,5),
        quad_vertexes(3,7,2,6)
    };
    idata->indexBuffer->writeData(0, sizeof(idata_raw), idata_raw, true);
}

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);
}

//.........这里部分代码省略.........
				name, "General").get();

			// Create one submesh.
			Ogre::SubMesh* subMesh = mMeshes[tileIndex]->createSubMesh();

			// Create vertex data structure for vertices shared between submeshes.
			mMeshes[tileIndex]->sharedVertexData = new Ogre::VertexData();
			mMeshes[tileIndex]->sharedVertexData->vertexCount = vertexPerTile;

			// Create declaration (memory format) of vertex data.
			Ogre::VertexDeclaration* decl =
				mMeshes[tileIndex]->sharedVertexData->vertexDeclaration;

			size_t offset = 0;

			// 1st buffer
			decl->addElement(0, offset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
			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);

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

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

			// Allocate vertex buffer of the requested number of vertices (vertexPerTile)
			// and bytes per vertex (offset).
			Ogre::HardwareVertexBufferSharedPtr vbuf =
				Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
				offset, vertexPerTile, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);

			// Upload the vertex data to the card
			vbuf->writeData(0, vbuf->getSizeInBytes(), &(vertices.front()), true);

			// Set vertex buffer binding so buffer 0 is bound to our vertex buffer.
			Ogre::VertexBufferBinding* bind =
				mMeshes[tileIndex]->sharedVertexData->vertexBufferBinding; 
			bind->setBinding(0, vbuf);

			// Allocate index buffer of the requested number of vertices .
			Ogre::HardwareIndexBufferSharedPtr ibuf = Ogre::HardwareBufferManager::getSingleton().
				createIndexBuffer(
				Ogre::HardwareIndexBuffer::IT_16BIT, 
				trianglesPerTile * 3,
				Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);

			// Upload the index data to the card.
			ibuf->writeData(0, ibuf->getSizeInBytes(), &(indices[0].front()), true);

			/// Set parameters of the submesh
			subMesh->useSharedVertices = true;
			subMesh->indexData->indexBuffer = ibuf;
			subMesh->indexData->indexCount = indices[0].size();
			subMesh->indexData->indexStart = 0;
			subMesh->setMaterialName("terrain");

			float xMin = vertices[0];
			float yMin = vertices[1];
			float zMin = vertices[2];

			float xMax = vertices[0];
			float yMax = vertices[1];
			float zMax = vertices[2];

			for (unsigned int i = 0; i < vertexPerTile * 11; i += 11)
			{
				if (vertices[i    ] < xMin) xMin = vertices[i    ]; else
				if (vertices[i    ] > xMax) xMax = vertices[i    ];

				if (vertices[i + 1] < yMin) yMin = vertices[i + 1]; else
				if (vertices[i + 1] > yMax) yMax = vertices[i + 1];

				if (vertices[i + 2] < zMin) zMin = vertices[i + 2]; else
				if (vertices[i + 2] > zMax) zMax = vertices[i + 2];
			}

			// Set bounding information (for culling).
			mMeshes[tileIndex]->_setBounds(Ogre::AxisAlignedBox(xMin, yMin, zMin, xMax, yMax, zMax));
			mMeshes[tileIndex]->_setBoundingSphereRadius(1.0f);

			// Notify Mesh object that it has been loaded.
			mMeshes[tileIndex]->load();

			// Create entity.
			mEntities[tileIndex] = createEntity(name, name);
			mEntities[tileIndex]->setCastShadows(false);
			mEntities[tileIndex]->setUserAny(Ogre::Any(this));

			// Create scene node.
			mSceneNodes[tileIndex] = createSceneNode();
			mSceneNodes[tileIndex]->attachObject(mEntities[tileIndex]);

			// Advance to next tile.
			tileIndex++;
		}
	}
}

void EMDOgre::createOgreMesh(EMDSubmesh *submesh, string mesh_name) {
	string ogre_mesh_name = mesh_name + "_" + submesh->getMaterialName();
	Ogre::MeshPtr ogre_mesh = Ogre::MeshManager::getSingleton().createManual(ogre_mesh_name, XENOVIEWER_RESOURCE_GROUP);

	LibXenoverse::AABB mesh_aabb;
	mesh_aabb.reset();

	if (skeleton) {
		ogre_mesh->setSkeletonName(skeleton->getName());
	}

	// Create Vertex Pool
	vector<EMDVertex> submesh_vertices = submesh->getVertices();
	const size_t nVertices = submesh_vertices.size();
	const size_t nVertCount = 8;
	const size_t vbufCount = nVertCount*nVertices;
	float *vertices = (float *)malloc(sizeof(float)*vbufCount);
	for (size_t i = 0; i < nVertices; i++) {
		vertices[i*nVertCount] = submesh_vertices[i].x;
		vertices[i*nVertCount + 1] = submesh_vertices[i].y;
		vertices[i*nVertCount + 2] = submesh_vertices[i].z;
		vertices[i*nVertCount + 3] = submesh_vertices[i].nx;
		vertices[i*nVertCount + 4] = submesh_vertices[i].ny;
		vertices[i*nVertCount + 5] = submesh_vertices[i].nz;
		vertices[i*nVertCount + 6] = submesh_vertices[i].u;
		vertices[i*nVertCount + 7] = submesh_vertices[i].v;
		mesh_aabb.addPoint(submesh_vertices[i].x, submesh_vertices[i].y, submesh_vertices[i].z);
	}

	// Create Submeshes for each Triangle List
	vector<EMDTriangles> submesh_triangles = submesh->getTriangles();
	for (size_t i = 0; i < submesh_triangles.size(); i++) {
		Ogre::SubMesh *sub = createOgreSubmesh(&submesh_triangles[i], ogre_mesh);
	}

	// Create Shared Vertex Data for all submeshes
	Ogre::VertexData *vertex_data = new Ogre::VertexData();
	ogre_mesh->sharedVertexData = vertex_data;
	vertex_data->vertexCount = nVertices;

	Ogre::VertexDeclaration* decl = vertex_data->vertexDeclaration;
	size_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(offset, nVertices, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
	vbuf->writeData(0, vbuf->getSizeInBytes(), vertices, true);
	Ogre::VertexBufferBinding* bind = vertex_data->vertexBufferBinding;
	bind->setBinding(0, vbuf);


	// Create Bone Assignments if Skeleton name exists
	if (skeleton) {
		Ogre::Skeleton *ogre_skeleton = skeleton->getOgreSkeleton();
		if (ogre_skeleton) {
			for (size_t i = 0; i < submesh_triangles.size(); i++) {
				EMDTriangles *triangles = &submesh_triangles[i];
				vector<unsigned int> vertex_indices;
				size_t face_count = triangles->faces.size();

				// Make a list of all vertex indices being used in the submesh
				vertex_indices.reserve(face_count);
				for (size_t j = 0; j < face_count; j++) {
					bool found = false;

					for (size_t k = 0; k < vertex_indices.size(); k++) {
						if (vertex_indices[k] == triangles->faces[j]) {
							found = true;
							break;
						}
					}

					if (!found) vertex_indices.push_back(triangles->faces[j]);
				}

				// Build Bone Mapping Table
				vector<unsigned short> bone_table;
				bone_table.resize(triangles->bone_names.size());

				for (size_t j = 0; j < bone_table.size(); j++) {
					string bone_name = triangles->bone_names[j];

					LOG_DEBUG("Bone Skin Table %d: %s\n", j, bone_name.c_str());
					if (ogre_skeleton->hasBone(bone_name)) {
						Ogre::Bone *mBone = ogre_skeleton->getBone(bone_name);
						bone_table[j] = mBone->getHandle();
					}
					else {
						LOG_DEBUG("Couldn't find %s in ogre skeleton!\n", bone_name.c_str());
					}
				}

				// Add bone assignments to all the vertices that were found
//.........这里部分代码省略.........

//.........这里部分代码省略.........
    if(!bounds.isValid())
    {
        float v[3] = { 0.0f, 0.0f, 0.0f };
        bounds.add(&v[0], 1);
    }

    mesh->_setBounds(Ogre::AxisAlignedBox(bounds.minX()-0.5f, bounds.minY()-0.5f, bounds.minZ()-0.5f,
                                          bounds.maxX()+0.5f, bounds.maxY()+0.5f, bounds.maxZ()+0.5f));
    mesh->_setBoundingSphereRadius(bounds.getRadius());

    // This function is just one long stream of Ogre-barf, but it works
    // great.
    Ogre::HardwareBufferManager *hwBufMgr = Ogre::HardwareBufferManager::getSingletonPtr();
    Ogre::HardwareVertexBufferSharedPtr vbuf;
    Ogre::HardwareIndexBufferSharedPtr ibuf;
    Ogre::VertexBufferBinding *bind;
    Ogre::VertexDeclaration *decl;
    int nextBuf = 0;

    Ogre::SubMesh *sub = mesh->createSubMesh();

    // Add vertices
    sub->useSharedVertices = false;
    sub->vertexData = new Ogre::VertexData();
    sub->vertexData->vertexStart = 0;
    sub->vertexData->vertexCount = srcVerts.size();

    decl = sub->vertexData->vertexDeclaration;
    bind = sub->vertexData->vertexBufferBinding;
    if(srcVerts.size())
    {
        vbuf = hwBufMgr->createVertexBuffer(Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3),
                                            srcVerts.size(), vertUsage, vertShadowBuffer);
        vbuf->writeData(0, vbuf->getSizeInBytes(), &srcVerts[0][0], true);

        decl->addElement(nextBuf, 0, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
        bind->setBinding(nextBuf++, vbuf);
    }

    // Vertex normals
    if(srcNorms.size())
    {
        vbuf = hwBufMgr->createVertexBuffer(Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3),
                                            srcNorms.size(), vertUsage, vertShadowBuffer);
        vbuf->writeData(0, vbuf->getSizeInBytes(), &srcNorms[0][0], true);

        decl->addElement(nextBuf, 0, Ogre::VET_FLOAT3, Ogre::VES_NORMAL);
        bind->setBinding(nextBuf++, vbuf);
    }

    // Vertex colors
    const std::vector<Ogre::Vector4> &colors = data->colors;
    if(colors.size())
    {
        Ogre::RenderSystem *rs = Ogre::Root::getSingleton().getRenderSystem();
        std::vector<Ogre::RGBA> colorsRGB(colors.size());
        for(size_t i = 0;i < colorsRGB.size();i++)
        {
            Ogre::ColourValue clr(colors[i][0], colors[i][1], colors[i][2], colors[i][3]);
            rs->convertColourValue(clr, &colorsRGB[i]);
        }
        vbuf = hwBufMgr->createVertexBuffer(Ogre::VertexElement::getTypeSize(Ogre::VET_COLOUR),
                                            colorsRGB.size(), Ogre::HardwareBuffer::HBU_STATIC);
        vbuf->writeData(0, vbuf->getSizeInBytes(), &colorsRGB[0], true);
        decl->addElement(nextBuf, 0, Ogre::VET_COLOUR, Ogre::VES_DIFFUSE);
        bind->setBinding(nextBuf++, vbuf);

//.........这里部分代码省略.........

      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(
      offset,
      data->vertexCount,
      Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
  vbuf->writeData(0, vbuf->getSizeInBytes(), &vertex_data.front(), true);
  data->vertexBufferBinding->setBinding(0, vbuf);

  // Setup index buffer.
  Ogre::HardwareIndexBufferSharedPtr ibuf =
    Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(
      Ogre::HardwareIndexBuffer::IT_32BIT,
      index_buf.size(),
      Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);

  ibuf->writeData(0, ibuf->getSizeInBytes(), &index_buf.front(), true);
  Ogre::SubMesh *subMesh = mesh->createSubMesh();
  subMesh->useSharedVertices = true;
  subMesh->indexData->indexBuffer = ibuf;
  subMesh->indexData->indexCount  = index_buf.size();
  subMesh->indexData->indexStart  = 0;

  mesh->_setBounds(Ogre::AxisAlignedBox(bounds.min.X, bounds.min.Y, bounds.min.Z, bounds.max.X, bounds.max.Y, bounds.max.Z));
  mesh->_setBoundingSphereRadius((std::max(bounds.max.X - bounds.min.X, std::max(bounds.max.Y - bounds.min.Y, bounds.max.Z - bounds.min.Z))) / 2.0);

  mesh->load();

  Ogre::Entity *ent = mSceneMgr->createEntity(Ogre::String(name) + Ogre::String(m->name) + "E", Ogre::String(name) + Ogre::String(m->name));
  ent->setUserAny(Ogre::Any(static_cast<l2p::UObject*>(m.get())));
  ent->setMaterialName("StaticMesh/Default");
  Ogre::SceneNode *node = mUnrealCordNode->createChildSceneNode();
  node->attachObject(ent);

  return node;
}

void ChunkBase::generateMesh()
{
	if (!mIsModified) return;

	generateVertices();

	if (isEmpty) {

		return;
	}

	uint32_t numVertices, numIndices;
	if (mNumVertices > DefaultFaces * 4) {
		// more vertices than the default buffer can hold -> allocate new one;
		if (mVertexBufferCreated) {
			removeMesh();
		}

		numVertices = mNumVertices;
		numIndices = mNumIndices;
	} else {
		numVertices = DefaultFaces * 4;
		numIndices = DefaultFaces * 6;
	}

	if (!mVertexBufferCreated) {
		mMeshPtr = Ogre::MeshManager::getSingleton().createManual(mChunkName, "Game");
		Ogre::SubMesh* sub = mMeshPtr->createSubMesh();
		
		/// Create vertex data structure for 8 vertices shared between submeshes
		mMeshPtr->sharedVertexData = new Ogre::VertexData();
		mMeshPtr->sharedVertexData->vertexCount = mNumVertices;
 
		/// Create declaration (memory format) of vertex data
		Ogre::VertexDeclaration* decl = mMeshPtr->sharedVertexData->vertexDeclaration;
    
		size_t offset = 0;
		// 1st buffer
		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);
    
		/// Allocate vertex buffer of the requested number of vertices (vertexCount) and bytes per vertex (offset)
		Ogre::HardwareVertexBufferSharedPtr vbuf = Ogre::HardwareBufferManager::getSingleton().
			createVertexBuffer(offset, numVertices, Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE);
    
		/// Upload the vertex data to the card
		vbuf->writeData(0, (decl->getVertexSize(0) * mNumVertices), mVertices, true);
 
		/// Set vertex buffer binding so buffer 0 is bound to our vertex buffer
		Ogre::VertexBufferBinding* bind = mMeshPtr->sharedVertexData->vertexBufferBinding; 
		bind->setBinding(0, vbuf);

		/// Allocate index buffer of the requested number of vertices (ibufCount) 
		Ogre::HardwareIndexBufferSharedPtr ibuf = Ogre::HardwareBufferManager::getSingleton().
			createIndexBuffer(Ogre::HardwareIndexBuffer::IT_16BIT, numIndices, Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE);
 
		/// Upload the index data to the card
		ibuf->writeData(0, (ibuf->getIndexSize() * mNumIndices), mIndices, true);
 
		/// Set parameters of the submesh
		sub->indexData->indexBuffer = ibuf;
		sub->indexData->indexCount = mNumIndices;

		/// Set bounding information (for culling)
		mMeshPtr->_setBounds(Ogre::AxisAlignedBox(0, 0, 0, Ogre::Real(ChunkSizeX), Ogre::Real(mHighestCube), Ogre::Real(ChunkSizeZ)));
		mMeshPtr->_setBoundingSphereRadius((Ogre::Real) std::sqrt((float) (2 * 16 * 16 + 128 * 128)));
 
		/// Notify -Mesh object that it has been loaded
		mMeshPtr->load();

		mVertexBufferCreated = true;
	} else {
		Ogre::VertexDeclaration* decl = mMeshPtr->sharedVertexData->vertexDeclaration;

		mMeshPtr->sharedVertexData->vertexCount = mNumVertices;
		Ogre::SubMesh* sub = mMeshPtr->getSubMesh(0);
		sub->indexData->indexCount = mNumIndices;

		/// Upload the new vertex data to the card
		Ogre::HardwareVertexBufferSharedPtr vbuf = mMeshPtr->sharedVertexData->vertexBufferBinding->getBuffer(0);
		vbuf->writeData(0, (decl->getVertexSize(0) * mNumVertices), mVertices, true);

		/// Upload the index data to the card
		Ogre::HardwareIndexBufferSharedPtr ibuf = sub->indexData->indexBuffer;
		ibuf->writeData(0, (ibuf->getIndexSize() * mNumIndices), mIndices, true);

		mMeshPtr->_setBounds(Ogre::AxisAlignedBox(0, 0, 0, Ogre::Real(ChunkSizeX), Ogre::Real(mHighestCube), Ogre::Real(ChunkSizeZ)));
		mMeshPtr->load();
	}
}

void WaterObjectView::createLine()
{
	size_t verticesCount = ((mWaterObject->getPointCount() - 1) * mSegments + 1) * 2;
	size_t verticesSize = verticesCount * 5;
	size_t indicesSize = ((mWaterObject->getPointCount() - 1) * mSegments) * 6;

	verticesCount = mWaterObject->getPointCount() * 2;
	verticesSize = verticesCount * 5;
	indicesSize = (mWaterObject->getPointCount() - 1) * 6;

	Ogre::Real* vertices  = new Ogre::Real[verticesSize];
	Ogre::uint16* indices = new Ogre::uint16[indicesSize];

	unsigned int i, index = 0;

	// Prepare vertices.
	for (i = 0; i < mWaterObject->getPointCount(); ++i)
	{
		const Point3D& point3D = mWaterObject->getPoint(i);

		vertices[index++] = point3D.x - mWaterObject->getWidth() * 0.5f;
		vertices[index++] = point3D.y;
		vertices[index++] = point3D.z + 1.0f;

		vertices[index++] = point3D.x - mWaterObject->getWidth() * 0.5f;;
		vertices[index++] = point3D.z;

		vertices[index++] = point3D.x + mWaterObject->getWidth() * 0.5f;
		vertices[index++] = point3D.y;
		vertices[index++] = point3D.z + 1.0f;

		vertices[index++] = point3D.x + mWaterObject->getWidth() * 0.5f;
		vertices[index++] = point3D.z;
	}

	index = 0;

	// Prepare indices.
	for (i = 0; i < verticesCount - 2; i += 2)
	{
		indices[index++] = (Ogre::uint16)i;
		indices[index++] = (Ogre::uint16)i + 2;
		indices[index++] = (Ogre::uint16)i + 1;

		indices[index++] = (Ogre::uint16)i + 2;
		indices[index++] = (Ogre::uint16)i + 3;
		indices[index++] = (Ogre::uint16)i + 1;
	}

	// Create mesh.
	mMesh = Ogre::MeshManager::getSingleton().createManual(
		Ogre::StringConverter::toString(mID), "General").get();

	// Create one submesh.
	Ogre::SubMesh* sub = mMesh->createSubMesh();

	// Create vertex data structure for 8 vertices shared between submeshes.
	mMesh->sharedVertexData = new Ogre::VertexData();
	mMesh->sharedVertexData->vertexCount = verticesCount;

	// Create declaration (memory format) of vertex data.
	Ogre::VertexDeclaration* decl = mMesh->sharedVertexData->vertexDeclaration;
	size_t offset = 0;

	// 1st buffer
	decl->addElement(0, offset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
	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);

	/// Allocate vertex buffer of the requested number of vertices (vertexCount) 
	/// and bytes per vertex (offset)
	Ogre::HardwareVertexBufferSharedPtr vbuf =
		Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
		offset, mMesh->sharedVertexData->vertexCount,
		Ogre::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
	Ogre::VertexBufferBinding* bind =
		mMesh->sharedVertexData->vertexBufferBinding; 
	bind->setBinding(0, vbuf);

	/// Allocate index buffer of the requested number of vertices (ibufCount).
	Ogre::HardwareIndexBufferSharedPtr ibuf = Ogre::HardwareBufferManager::getSingleton().
		createIndexBuffer(
		Ogre::HardwareIndexBuffer::IT_16BIT, 
		indicesSize, 
		Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);

	/// Upload the index data to the card.
	ibuf->writeData(0, ibuf->getSizeInBytes(), indices, true);

	/// Set parameters of the submesh.
	sub->useSharedVertices = true;
	sub->indexData->indexBuffer = ibuf;
	sub->indexData->indexCount = indicesSize;
//.........这里部分代码省略.........