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

void processPositionElement( VertexData* vertexData, const VertexElement* vertexElem )
{
	int nMaxVert= vertexData->vertexCount ;
	//const Ogre::VertexElement* VertexEle_POS = vertexData->vertexDeclaration->findElementBySemantic( Ogre::VES_POSITION );
 
	// get vertex buffer info via the input element
	Ogre::HardwareVertexBufferSharedPtr VertexBufPOS = vertexData->vertexBufferBinding->getBuffer( vertexElem->getSource() );
 
	//LOCK BUFFER
	unsigned char* VertexPtrPOS = static_cast<unsigned char*>( VertexBufPOS->lock( Ogre::HardwareBuffer::HBL_NORMAL)   );
	int VertSizePOS=VertexBufPOS->getVertexSize();

	float * pElementPOS=NULL;
   
	//A vector of every vertices position
	std::vector<Ogre::Vector3> positions(nMaxVert);
	//Copy each position into position vector
	for(int nVert=0 ; nVert<nMaxVert ; nVert++)
	{
		vertexElem->baseVertexPointerToElement( VertexPtrPOS, &pElementPOS );
		Ogre::Vector3 vertex(pElementPOS);
		vertex = mTransform * vertex;
		pElementPOS[0] = vertex.x;
		pElementPOS[1] = vertex.y;
		pElementPOS[2] = vertex.z;
		mBoundingBox.merge(vertex);
		VertexPtrPOS+=VertSizePOS ;
	}
	//UNLOCK BUFFER
	if(VertexBufPOS->isLocked()){VertexBufPOS->unlock();}
}

//------------------------------------------------------------------------------------------------
void VertexIndexToShape::addStaticVertexData(const Ogre::VertexData *vertex_data)
{
    if (!vertex_data)
    {
        return;
    }

    const Ogre::VertexData *data = vertex_data;

    const unsigned int prev_size = mVertexCount;
    mVertexCount += (unsigned int)data->vertexCount;

    Ogre::Vector3 *tmp_vert = new Ogre::Vector3[mVertexCount];
    if (mVertexBuffer)
    {
        memcpy(tmp_vert, mVertexBuffer, sizeof(Ogre::Vector3) * prev_size);
        delete[] mVertexBuffer;
    }
    mVertexBuffer = tmp_vert;

    // Get the positional buffer element
    {	
        const Ogre::VertexElement *posElem = data->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
        Ogre::HardwareVertexBufferSharedPtr vbuf = data->vertexBufferBinding->getBuffer(posElem->getSource());
        const unsigned int vSize = (unsigned int)vbuf->getVertexSize();

        unsigned char *vertex = static_cast<unsigned char*>(vbuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
        float *pReal = NULL;
        Ogre::Vector3 * curVertices = &mVertexBuffer[prev_size];
        const unsigned int vertexCount = (unsigned int)data->vertexCount;
        for (unsigned int j = 0; j < vertexCount; ++j)
        {
            posElem->baseVertexPointerToElement(vertex, &pReal);
            vertex += vSize;

            curVertices->x = (*pReal++);
            curVertices->y = (*pReal++);
            curVertices->z = (*pReal++);

            *curVertices = mTransform * (*curVertices);
            
            curVertices++;
        }
        vbuf->unlock();
    }
}

//-------------------------------------------------------
// http://www.ogre3d.org/tikiwiki/Raycasting+to+the+polygon+level
std::pair<bool, float> Ground::GetVertexIntersection(const Ogre::Ray & ray, const Ogre::SubMesh* subMesh)
{
    OgreAssert(false == subMesh->useSharedVertices, "Mesh with shared data is not supported");

    const Ogre::VertexElement* posElem = subMesh->vertexData->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
    
    Ogre::HardwareVertexBufferSharedPtr vbuffer = subMesh->vertexData->vertexBufferBinding->getBuffer(posElem->getSource());

    unsigned char* vertexes = reinterpret_cast<unsigned char*>(vbuffer->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));

    size_t count = subMesh->vertexData->vertexCount;

    float intersection = -1.0f;

    OgreAssert(count == REGION_SIZE * REGION_SIZE * 4, "Wrong buffer size");
    float* pReal;
    for (size_t i = 0; i < REGION_SIZE * REGION_SIZE; ++i)
    {
        Ogre::Vector3 v0, v1, v2, v3;
        for (auto vp : { &v0, &v1, &v2, &v3 })
        {
            posElem->baseVertexPointerToElement(vertexes, &pReal);
            *vp = Ogre::Vector3(pReal[0], pReal[1], pReal[2]);
            vertexes += vbuffer->getVertexSize();
        }

        auto hit1 = Ogre::Math::intersects(ray, v1, v2, v0, true, false);
        if (hit1.first && (intersection < 0.0f || hit1.second < intersection))
        {
            intersection = hit1.second;
        }
        auto hit2 = Ogre::Math::intersects(ray, v3, v2, v1, true, false);
        if (hit2.first && (intersection < 0.0f || hit2.second < intersection))
        {
            intersection = hit2.second;
        }
    }
    vbuffer->unlock();
    if (intersection >= 0.0f)
    {
        return std::make_pair(true, intersection);
    }
    return std::make_pair(false, -1.0f);
}

std::vector<Ogre::Vector3> OgreRecast::getManualObjectVertices(Ogre::ManualObject *manual)
{
    std::vector<Ogre::Vector3> returnVertices;
    unsigned long thisSectionStart = 0;
    for (size_t i=0; i < manual->getNumSections(); i++)
    {
        Ogre::ManualObject::ManualObjectSection * section = manual->getSection(i);
        Ogre::RenderOperation * renderOp = section->getRenderOperation();

        //Collect the vertices
        {
            const Ogre::VertexElement * vertexElement = renderOp->vertexData->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
            Ogre::HardwareVertexBufferSharedPtr vertexBuffer = renderOp->vertexData->vertexBufferBinding->getBuffer(vertexElement->getSource());

            char * verticesBuffer = (char*)vertexBuffer->lock(Ogre::HardwareBuffer::HBL_READ_ONLY);
            float * positionArrayHolder;

            thisSectionStart = returnVertices.size();

            returnVertices.reserve(returnVertices.size() + renderOp->vertexData->vertexCount);

            for (unsigned int j=0; j<renderOp->vertexData->vertexCount; j++)
            {
                vertexElement->baseVertexPointerToElement(verticesBuffer + j * vertexBuffer->getVertexSize(), &positionArrayHolder);
                Ogre::Vector3 vertexPos = Ogre::Vector3(positionArrayHolder[0],
                                                        positionArrayHolder[1],
                                                        positionArrayHolder[2]);

                //vertexPos = (orient * (vertexPos * scale)) + position;

                returnVertices.push_back(vertexPos);
            }

            vertexBuffer->unlock();
        }
    }

    return returnVertices;
}

	void VertexBuffer::AddFromVertexData(Ogre::VertexData* vertexData)
	{
		// Get vertex count
		const unsigned int addedCount = vertexData->vertexCount;

		if(_reserved < _size + addedCount)
		{
			Reserve(_size + addedCount);
		}

		// Get VertexElement with info on used vertex semantics
		const Ogre::VertexElement* vertexElement = 
			vertexData->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
		// Get actual vertex buffer and its size
		Ogre::HardwareVertexBufferSharedPtr hardwareBuffer = 
			vertexData->vertexBufferBinding->getBuffer(vertexElement->getSource());
		const unsigned int vertexSize = (unsigned int)hardwareBuffer->getVertexSize();
		// Lock buffer with read-only to retrieve vertex data
		unsigned char* buffer = static_cast<unsigned char*>(
			hardwareBuffer->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
		// Pointer to one component of vertex vector
		float *curVertexData = NULL;

		for (unsigned int j = 0; j < addedCount; ++j)
		{
			vertexElement->baseVertexPointerToElement(buffer, &curVertexData);
			buffer += vertexSize;

			_buffer.push_back(Ogre::Vector3(
				*curVertexData,
				*(curVertexData+1) ,
				*(curVertexData+2)));

			curVertexData += 3;
		}

		_size = _buffer.size();
		hardwareBuffer->unlock();
	}

void GPUBillboardSet::createVertexDataForVertexAndGeometryShaders(const std::vector<PhotoSynth::Vertex>& vertices)
{
	// Setup render operation
	mRenderOp.operationType = Ogre::RenderOperation::OT_POINT_LIST; 
	mRenderOp.vertexData = OGRE_NEW Ogre::VertexData();
	mRenderOp.vertexData->vertexCount = vertices.size(); 
	mRenderOp.vertexData->vertexStart = 0; 
	mRenderOp.useIndexes = false; 
	mRenderOp.indexData = 0;

	// Vertex format declaration
	unsigned short sourceBufferIdx = 0;
    Ogre::VertexDeclaration* decl = mRenderOp.vertexData->vertexDeclaration;
    size_t currOffset = 0;
	decl->addElement(sourceBufferIdx, currOffset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
	currOffset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);
	decl->addElement(sourceBufferIdx, currOffset, Ogre::VET_COLOUR, Ogre::VES_DIFFUSE);
	currOffset += Ogre::VertexElement::getTypeSize(Ogre::VET_COLOUR);

	// Create vertex buffer
	Ogre::HardwareVertexBufferSharedPtr vbuf = Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
		decl->getVertexSize(sourceBufferIdx),
		mRenderOp.vertexData->vertexCount,
		Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);

    // Bind vertex buffer
    Ogre::VertexBufferBinding* bind = mRenderOp.vertexData->vertexBufferBinding;
	bind->setBinding(sourceBufferIdx, vbuf);

	// Fill vertex buffer (see http://www.ogre3d.org/docs/manual/manual_59.html#SEC287)
	Ogre::RenderSystem* renderSystem = Ogre::Root::getSingletonPtr()->getRenderSystem();
	unsigned char* pVert = static_cast<unsigned char*>(vbuf->lock(Ogre::HardwareBuffer::HBL_DISCARD));
	Ogre::Real* pReal;
	Ogre::RGBA* pRGBA;
	Ogre::VertexDeclaration::VertexElementList elems = decl->findElementsBySource(sourceBufferIdx);
	Ogre::VertexDeclaration::VertexElementList::iterator itr;
	for (unsigned int i=0; i<vertices.size(); ++i )
	{
		const PhotoSynth::Vertex& vertex = vertices[i];
		for (itr=elems.begin(); itr!=elems.end(); ++itr)
		{
			Ogre::VertexElement& elem = *itr;
			if (elem.getSemantic() == Ogre::VES_POSITION)
			{
				elem.baseVertexPointerToElement(pVert, &pReal);
				*pReal = vertex.position.x; *pReal++;
				*pReal = vertex.position.y; *pReal++;
				*pReal = vertex.position.z; *pReal++;
			}
			else if (elem.getSemantic() == Ogre::VES_DIFFUSE)
			{
				elem.baseVertexPointerToElement(pVert, &pRGBA);
				renderSystem->convertColourValue(vertex.color, pRGBA);
			}
		}
		// Go to next vertex 
		pVert += vbuf->getVertexSize();
	}
	vbuf->unlock();

    // Set material
    this->setMaterial("GPUBillboardWithGS");
}

void GPUBillboardSet::createVertexDataForVertexShaderOnly(const std::vector<PhotoSynth::Vertex>& vertices)
{
	// Setup render operation
	mRenderOp.operationType = Ogre::RenderOperation::OT_TRIANGLE_LIST; 
	mRenderOp.vertexData = OGRE_NEW Ogre::VertexData();
	mRenderOp.vertexData->vertexCount = vertices.size() * 4; 
	mRenderOp.vertexData->vertexStart = 0; 
	mRenderOp.useIndexes = true; 
	mRenderOp.indexData = OGRE_NEW Ogre::IndexData();
	mRenderOp.indexData->indexCount = vertices.size() * 6;
	mRenderOp.indexData->indexStart = 0;

	// Vertex format declaration
	unsigned short sourceBufferIdx = 0;
	Ogre::VertexDeclaration* decl = mRenderOp.vertexData->vertexDeclaration;
    size_t currOffset = 0;
	decl->addElement(sourceBufferIdx, currOffset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
	currOffset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);
	decl->addElement(sourceBufferIdx, currOffset, Ogre::VET_COLOUR, Ogre::VES_DIFFUSE);
	currOffset += Ogre::VertexElement::getTypeSize(Ogre::VET_COLOUR);
	decl->addElement(sourceBufferIdx, currOffset, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES, 0);
	currOffset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT2);

	// Create vertex buffer
    Ogre::HardwareVertexBufferSharedPtr vbuf = Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
		decl->getVertexSize(sourceBufferIdx),
        mRenderOp.vertexData->vertexCount,
        Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);

    // Bind vertex buffer
    Ogre::VertexBufferBinding* bind = mRenderOp.vertexData->vertexBufferBinding;
	bind->setBinding(sourceBufferIdx, vbuf);

	// Fill vertex buffer (see http://www.ogre3d.org/docs/manual/manual_59.html#SEC287)
	Ogre::RenderSystem* renderSystem = Ogre::Root::getSingletonPtr()->getRenderSystem();
	unsigned char* pVert = static_cast<unsigned char*>(vbuf->lock(Ogre::HardwareBuffer::HBL_DISCARD));
	Ogre::Real* pReal;
	Ogre::RGBA* pRGBA;
	Ogre::VertexDeclaration::VertexElementList elems = decl->findElementsBySource(sourceBufferIdx);
	Ogre::VertexDeclaration::VertexElementList::iterator itr;

	const Ogre::Vector2 uvs[4] = {	Ogre::Vector2( -1.f, 1.f ),
									Ogre::Vector2( -1.f, -1.f ),
									Ogre::Vector2( 1.f, -1.f ),
									Ogre::Vector2( 1.f, 1.f ) };
	for (unsigned int i=0; i<vertices.size(); ++i )
	{
		const PhotoSynth::Vertex& vertex = vertices[i];
		for ( unsigned int j=0; j<4; j++ )
		{
			for (itr=elems.begin(); itr!=elems.end(); ++itr)
			{
				Ogre::VertexElement& elem = *itr;
				if (elem.getSemantic() == Ogre::VES_POSITION)
				{
					elem.baseVertexPointerToElement(pVert, &pReal);
					*pReal = vertex.position.x; *pReal++;
					*pReal = vertex.position.y; *pReal++;
					*pReal = vertex.position.z; *pReal++;
				}
				else if (elem.getSemantic() == Ogre::VES_DIFFUSE)
				{
					elem.baseVertexPointerToElement(pVert, &pRGBA);
					renderSystem->convertColourValue(vertex.color, pRGBA);
				}
				else if (elem.getSemantic() == Ogre::VES_TEXTURE_COORDINATES && elem.getIndex() == 0)
				{
					elem.baseVertexPointerToElement(pVert, &pReal);
					*pReal = uvs[j].x; *pReal++;
					*pReal = uvs[j].y; *pReal++;
				}
			}
			// Go to next vertex 
			pVert += vbuf->getVertexSize();
		}
	}
	vbuf->unlock();

	// Create index buffer
	if (mRenderOp.indexData->indexCount>=65536)
	{
		Ogre::HardwareIndexBufferSharedPtr ibuf = Ogre::HardwareBufferManager::getSingleton().createIndexBuffer( 
			Ogre::HardwareIndexBuffer::IT_32BIT, 
			mRenderOp.indexData->indexCount, 
			Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY, false);

		mRenderOp.indexData->indexBuffer = ibuf;
		Ogre::uint32* indices = static_cast<Ogre::uint32*>(ibuf->lock( Ogre::HardwareBuffer::HBL_DISCARD));

		Ogre::uint32 indexFirstVertex = 0;
		const Ogre::uint32 inds[6] = {	0, 1, 2, 3, 0, 2 };
		for (unsigned int i=0; i<vertices.size(); ++i)
		{
			for (unsigned int j=0; j<6; ++j)
			{
				*indices = indexFirstVertex + inds[j];
				indices++;
			}
			indexFirstVertex +=4;
		}
//.........这里部分代码省略.........

void Renderer::FindClosestPolygon(Ogre::Entity* entity, float& closestDistance,
                                       Ogre::Vector3& position, Ogre::Vector3& normal)
{
    closestDistance = std::numeric_limits<float>::max();    // default value (means
                                                            // nothing detected)

    // Get transformation
    Ogre::SceneNode* parentNode = entity->getParentSceneNode();
    Ogre::Vector3 parentPos;
    Ogre::Quaternion parentOrientation;
    Ogre::Vector3 parentScale;
    if (parentNode)
    {
        parentPos = parentNode->_getDerivedPosition();
        parentOrientation = parentNode->_getDerivedOrientation();
        parentScale = parentNode->_getDerivedScale();
    }
    else
    {
        parentPos = Ogre::Vector3::ZERO;
        parentOrientation = Ogre::Quaternion::IDENTITY;
        parentScale = Ogre::Vector3::UNIT_SCALE;
    }

    // Handle animated entities
    bool isAnimated = entity->hasSkeleton();
    if (isAnimated)
    {
        entity->addSoftwareAnimationRequest(false);
        entity->_updateAnimation();
    }

    // Loop through each submesh
    Ogre::MeshPtr mesh = entity->getMesh();
    for (uint i = 0; i < mesh->getNumSubMeshes(); ++i)
    {
        Ogre::SubMesh* subMesh = mesh->getSubMesh(i);

        // Ignore anything that isn't a triangle List
        if (subMesh->operationType != Ogre::RenderOperation::OT_TRIANGLE_LIST)
            continue;

        // Get the vertex data
        Ogre::VertexData* vertexData;
        if (subMesh->useSharedVertices)
        {
            if (isAnimated)
                vertexData = entity->_getSkelAnimVertexData();
            else
                vertexData = mesh->sharedVertexData;
        }
        else
        {
            if (isAnimated)
                vertexData = entity->getSubEntity(i)->_getSkelAnimVertexData();
            else
                vertexData = subMesh->vertexData;
        }

        // Get the size of one vertex
        const Ogre::VertexElement* posEl =
            vertexData->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
        Ogre::HardwareVertexBufferSharedPtr vBuff =
            vertexData->vertexBufferBinding->getBuffer(posEl->getSource());
        uint vertexSize = vBuff->getVertexSize();

        // Save pointer to first vertex
        short* pVertex = (short*)vBuff->lock(Ogre::HardwareBuffer::HBL_READ_ONLY);
        short* pStartVertex = pVertex;

        // Get the index buffer
        // If it is null then skip as it must be a point cloud
        Ogre::HardwareIndexBufferSharedPtr iBuff = subMesh->indexData->indexBuffer;

        if (iBuff.isNull())
            continue;

        uint* pLong = (uint*)iBuff->lock(Ogre::HardwareBuffer::HBL_READ_ONLY);
        uint16_t* pShort = (uint16_t*)pLong;

        // Look through each vertex and check each triangle with the ray
        Ogre::Vector3 vertexPos;
        Ogre::Vector3 vertex1;
        Ogre::Vector3 vertex2;
        float* pReal;
        uint index;
        for (uint k = 0; k < subMesh->indexData->indexCount; k++)
        {
            // Read index value
            if (iBuff->getType() == Ogre::HardwareIndexBuffer::IT_32BIT)    // if 32bit indexes
            {
                index = (uint)pLong[k];
            }
            else
            {
                index = (uint)pShort[k];
            }

            // Read referenced vertex
            pVertex = pStartVertex + (vertexSize * index);              // calculate pointer
//.........这里部分代码省略.........

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;
		}
}

	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 MeshInfo::getMeshInformation(	Ogre::MeshPtr mesh,
										const Vector3 &position,
										const Quaternion &orient,
										const Vector3 &scale)
	{
		size_t vertexCount = 0;
		size_t indexCount = 0;
		Vector3* vertices = 0;
		Vector3* normals;
		unsigned long* indices = 0;

		bool added_shared = false;
		size_t current_offset = 0;
		size_t shared_offset = 0;
		size_t next_offset = 0;
		size_t index_offset = 0;

		// Calculate how many vertices and indices we're going to need
		for ( unsigned short i = 0; i < mesh->getNumSubMeshes(); ++i)
		{
			Ogre::SubMesh* submesh = mesh->getSubMesh( i );

			// We only need to add the shared vertices once
			if(submesh->useSharedVertices)
			{
				if( !added_shared )
				{
					vertexCount += mesh->sharedVertexData->vertexCount;
					added_shared = true;
				}
			}
			else
			{
				vertexCount += submesh->vertexData->vertexCount;
			}

			// Add the indices
			indexCount += submesh->indexData->indexCount;
		}

		// Allocate space for the vertices and indices
		vertices = new Vector3[vertexCount];
		normals = new Vector3[vertexCount];
		indices = new unsigned long[indexCount];
		added_shared = false;

		// Run through the submeshes again, adding the data into the arrays
		for ( unsigned short i = 0; i < mesh->getNumSubMeshes(); ++i)
		{
			Ogre::SubMesh* submesh = mesh->getSubMesh(i);
			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);
				const Ogre::VertexElement* normalElem = vertex_data->vertexDeclaration->findElementBySemantic(Ogre::VES_NORMAL);
				Ogre::HardwareVertexBufferSharedPtr vbuf = vertex_data->vertexBufferBinding->getBuffer(posElem->getSource());
				unsigned char* vertex = static_cast<unsigned char*>(vbuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
				float* pReal;

				for( size_t j = 0; j < vertex_data->vertexCount; ++j, vertex += vbuf->getVertexSize())
				{
					posElem->baseVertexPointerToElement(vertex, &pReal);
					Vector3 pt(pReal[0], pReal[1], pReal[2]);
					vertices[current_offset + j] = (orient * (pt * scale)) + position;

					normalElem->baseVertexPointerToElement(vertex, &pReal);
					Vector3 nt(pReal[0], pReal[1], pReal[2]);
					normals[current_offset + j] = nt;
				}
      
				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;

			size_t numTrisMultThree = numTris*3;
			if ( use32bitindexes )
			{
				for ( size_t k = 0; k < numTrisMultThree; ++k)
				{
					indices[index_offset++] = pLong[k] + static_cast<unsigned long>(offset);
				}
			}
			else
			{
//.........这里部分代码省略.........

    void Utils::GetMeshInformation(
        const Ogre::MeshPtr mesh,
        size_t &vertexCount,
        Ogre::Vector3* &vertices,
        size_t &indexCount,
        unsigned* &indices) 
    {
        bool addShared = false;
        size_t currentOffset = 0;
        size_t shared_offset = 0;
        size_t nextOffset = 0;
        size_t indexOffset = 0;


        vertexCount = indexCount = 0;

        for ( unsigned short i = 0; i < mesh->getNumSubMeshes(); ++i) {
            Ogre::SubMesh* submesh = mesh->getSubMesh(i);
            if(submesh->useSharedVertices) {
                if( !addShared ) {
                    vertexCount += mesh->sharedVertexData->vertexCount;
                    addShared = true;
                }
            }
            else {
                vertexCount += submesh->vertexData->vertexCount;
            }
            indexCount += submesh->indexData->indexCount;
        }


        vertices = new Ogre::Vector3[vertexCount];
        indices = new unsigned[indexCount];

        addShared = false;

        for (unsigned short i = 0; i < mesh->getNumSubMeshes(); ++i) {
            Ogre::SubMesh* submesh = mesh->getSubMesh(i);

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

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

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

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

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

                float* pReal;

                for( size_t j = 0; j < vertexData->vertexCount; ++j, vertex += vbuf->getVertexSize()) {
                    posElem->baseVertexPointerToElement(vertex, &pReal);
                    Ogre::Vector3 pt(pReal[0], pReal[1], pReal[2]);
                    vertices[currentOffset + j] = pt;
                }
                
                vbuf->unlock();
                nextOffset += vertexData->vertexCount;
            }


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

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

            ibuf->unlock();
            currentOffset = nextOffset;
        }
    }

bool MaterialVertexBuffer::setSubMeshColors(
	EntityMaterial* entity,
	unsigned short mesh_index,
	size_t ui32VertexColorCount,
	const float* pVertexColorArray) const
{
	if(entity->getOgreEntity() == NULL)
	{
		m_rKernelContext.getLogManager() << LogLevel_Error << "Can't set colors : no Entity found!\n";
		return false;
	}

	Ogre::Mesh* mesh = entity->getOgreEntity()->getMesh().get();

	if(mesh == NULL || mesh_index >= mesh->getNumSubMeshes())
	{
		m_rKernelContext.getLogManager() << LogLevel_Error << "Can't set colors : no Mesh found!\n";
		return false;
	}

	Ogre::SubMesh* submesh = mesh->getSubMesh( mesh_index );

	if(submesh->useSharedVertices)
	{
		m_rKernelContext.getLogManager() << LogLevel_Error << "Can't set colors : vertices are shared and thus not accessible from SubMesh!\n";
		return false;
	}
	else
	{
		if(ui32VertexColorCount != submesh->vertexData->vertexCount)
		{
			m_rKernelContext.getLogManager() << LogLevel_Error << "Can't set colors : vertex count mismatch!\n";
			return false;
		}

		//get pointer to submesh vertex data
		Ogre::VertexData* vertex_data = submesh->vertexData;

		//get pointer to DIFFUSE element
		const Ogre::VertexElement* difElem = vertex_data->vertexDeclaration->findElementBySemantic(Ogre::VES_DIFFUSE);

		if(difElem == NULL)
		{
			m_rKernelContext.getLogManager() << LogLevel_Error << "Can't set colors : no colours_diffuse element found in vertex buffer!\n";
			return false;
		}

		//convert color to current RenderSystem's format
		Ogre::VertexElementType type = difElem->getType();

		//retrieve VB for DIFFUSE element
		Ogre::HardwareVertexBufferSharedPtr vbuf = vertex_data->vertexBufferBinding->getBuffer(difElem->getSource());

		//lock VB for reading
		unsigned char* color = static_cast<unsigned char*>(vbuf->lock(Ogre::HardwareBuffer::HBL_NORMAL));

		// 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;
		Ogre::RGBA* pRGBA;
		Ogre::ColourValue colour;

		for( size_t j = 0; j < vertex_data->vertexCount; ++j, color += vbuf->getVertexSize())
		{
			//get pointer to RGBA DIFFUSE data
			difElem->baseVertexPointerToElement(color, &pRGBA);

			colour.r = pVertexColorArray[4*j];
			colour.g = pVertexColorArray[4*j+1];
			colour.b = pVertexColorArray[4*j+2];
			colour.a = pVertexColorArray[4*j+3];

			//convert color from RGBA floats to a single ARGB uint32
			if(type == Ogre::VET_COLOUR_ARGB) //D3D format
			{
				*pRGBA = colour.getAsARGB();
			}
			else /*if type == OGRE::VET_COLOUR_ABGR)*/ //GL format
			{
				*pRGBA = colour.getAsABGR();
			}
		}

		//unlock VB
		vbuf->unlock();
	}

	return true;
}

void PhysicsManager::getMeshInformation(Ogre::MeshPtr mesh,size_t &vertex_count,Vector3* &vertices, size_t &index_count, unsigned* &indices, const Ogre::Vector3 &position,  const Ogre::Quaternion &orient,const Ogre::Vector3 &scale)
{
	vertex_count = index_count = 0;

	bool added_shared = false;
	size_t current_offset = vertex_count;
	size_t shared_offset = vertex_count;
	size_t next_offset = vertex_count;
	size_t index_offset = index_count;
	size_t prev_vert = vertex_count;
	size_t prev_ind = index_count;

	// Calculate how many vertices and indices we're going to need
	for(int i = 0;i < mesh->getNumSubMeshes();i++)
	{
		SubMesh* submesh = mesh->getSubMesh(i);

		// We only need to add the shared vertices once
		if(submesh->useSharedVertices)
		{
			if(!added_shared)
			{
				VertexData* vertex_data = mesh->sharedVertexData;
				vertex_count += vertex_data->vertexCount;
				added_shared = true;
			}
		}
		else
		{
			VertexData* vertex_data = submesh->vertexData;
			vertex_count += vertex_data->vertexCount;
		}

		// Add the indices
		Ogre::IndexData* index_data = submesh->indexData;
		index_count += index_data->indexCount;
	}

	// Allocate space for the vertices and indices
	vertices = new Vector3[vertex_count];
	indices = new unsigned[index_count];

	added_shared = false;

	// Run through the submeshes again, adding the data into the arrays
	for(int i = 0;i < mesh->getNumSubMeshes();i++)
	{
		SubMesh* submesh = mesh->getSubMesh(i);

		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));
			Ogre::Real* pReal;

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

				Vector3 pt;

				pt.x = (*pReal++);
				pt.y = (*pReal++);
				pt.z = (*pReal++);

				pt = (orient * (pt * scale)) + position;

				vertices[current_offset + j].x = pt.x;
				vertices[current_offset + j].y = pt.y;
				vertices[current_offset + j].z = pt.z;
			}
			vbuf->unlock();
			next_offset += vertex_data->vertexCount;
		}

		Ogre::IndexData* index_data = submesh->indexData;

		size_t numTris = index_data->indexCount / 3;
		unsigned short* pShort;
		unsigned int* pInt;
		Ogre::HardwareIndexBufferSharedPtr ibuf = index_data->indexBuffer;
		bool use32bitindexes = (ibuf->getType() == Ogre::HardwareIndexBuffer::IT_32BIT);
		if (use32bitindexes) pInt = static_cast<unsigned int*>(ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
		else pShort = static_cast<unsigned short*>(ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));

		for(size_t k = 0; k < numTris; ++k)
		{
			size_t offset = (submesh->useSharedVertices)?shared_offset:current_offset;

			unsigned int vindex = use32bitindexes? *pInt++ : *pShort++;
			indices[index_offset + 0] = vindex + offset;
			vindex = use32bitindexes? *pInt++ : *pShort++;
//.........这里部分代码省略.........

/* ----------------------------------------------------------------------- 
 | the function describe retrieve vertexbuffer from Ogre entity :   
 | (Ref:http://www.ogre3d.org/tikiwiki/tiki-index.php?page=RetrieveVertexData)
 |
 | @prama in : Ogre entity
 | @pamra out : vertex buffer, size of vertexbuffer, vertex indices, sizeof vertex indices
   ----------------------------------------------------------------------- */
void
getVertexBuffer(Ogre::Entity* ent, void* &vertices, size_t& vertexCount, void* &indices, size_t& indexCount)
{
    bool added_shared = false;
    size_t current_offset = 0;
    size_t shared_offset = 0;
    size_t next_offset = 0;
    size_t index_offset = 0;
 
    vertexCount = indexCount = 0;
 
    const Ogre::MeshPtr& mesh = ent->getMesh();

    // Calculate vertexCount, indexCount
    for ( Ogre::ushort i = 0; i < mesh->getNumSubMeshes(); ++i)
    {
        Ogre::SubMesh* subMesh = mesh->getSubMesh(i);        
        if (subMesh->useSharedVertices)
        {
            if( !added_shared )
            {
                vertexCount += mesh->sharedVertexData->vertexCount;
                added_shared = true;
            }

            vertexCount += mesh->sharedVertexData->vertexCount;
        }
        else
            vertexCount += subMesh->vertexData->vertexCount;
        
        indexCount += subMesh->indexData->indexCount;
    }
    
    // Alloc vertices, indices
    vertices = new Ogre::Vector3[ vertexCount ];
    indices = new Ogre::ulong[ indexCount ];
  
    added_shared = false;

    // Assign vertices data, indices data
    for (Ogre::ushort i = 0; i < mesh->getNumSubMeshes(); ++i)
    {
        Ogre::SubMesh* subMesh = mesh->getSubMesh(i);
        Ogre::VertexData* vertexData = subMesh->useSharedVertices ? mesh->sharedVertexData : subMesh->vertexData;

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

        // Retrieve vertices        
        const Ogre::VertexElement* posElem = vertexData->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
        Ogre::HardwareVertexBufferSharedPtr vbuf = vertexData->vertexBufferBinding->getBuffer(posElem->getSource());
        
        Ogre::uchar* vertex = static_cast<Ogre::uchar*>(vbuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
        Ogre::Real* data;
        
        for (size_t j = 0 ; j < vertexData->vertexCount ; ++j, vertex += vbuf->getVertexSize())
        {
            posElem->baseVertexPointerToElement(vertex, &data);
            Ogre::Vector3 origin(data[0], data[1], data[2]);
            // ((Ogre::Vector3*)vertices)[ current_offset + j ] = (orient * (origin * scale)) + position;
            ((Ogre::Vector3*)vertices)[ current_offset + j ] = origin;
        } // End for
        
        vbuf->unlock();
        next_offset += vertexData->vertexCount;
        } // End if

        // Retrieve indices
        Ogre::IndexData* indexData = subMesh->indexData;
        size_t trisCount = indexData->indexCount / 3;

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

        void* index = (ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));       
        Ogre::ulong offset = (subMesh->useSharedVertices) ? shared_offset : current_offset; 
        for (Ogre::ulong k = 0; k < trisCount * 3; ++k)
        {
            if ( use32bitindexes )
                ((Ogre::ulong*)indices)[ index_offset++ ] = ((Ogre::ulong*)index)[ k + offset ];
            else
                ((Ogre::ulong*)indices)[ index_offset++ ] = ((Ogre::ushort*)index)[ k + offset ];
        }

        ibuf->unlock();
        current_offset = next_offset;        
    } // End for
}