C++ HardwareIndexBufferSharedPtr::unlock方法代码示例

	/*求对象rend和射线ray的全部交点到射线原点的距离
	*/
	vector<Ogre::Real> BaseManager::Intersect(const Ogre::Ray& ray,Ogre::Renderable *rend){
		Ogre::RenderOperation op;
		Ogre::VertexElementType vtype;
		size_t offset,pkgsize,source,indexNums,vertexNums;
		vector<Ogre::Real> result;

		rend->getRenderOperation( op );

		if( !op.indexData || 
			op.operationType==Ogre::RenderOperation::OT_LINE_LIST || 
			op.operationType==Ogre::RenderOperation::OT_LINE_STRIP ||
			op.operationType==Ogre::RenderOperation::OT_POINT_LIST )
			return result;

		Ogre::VertexDeclaration* pvd = op.vertexData->vertexDeclaration;

		source = -1;
		for( size_t i = 0;i < pvd->getElementCount();++i ){
			if( pvd->getElement(i)->getSemantic()==Ogre::VES_POSITION ){
				source = pvd->getElement(i)->getSource();
				offset = pvd->getElement(i)->getOffset();
				vtype = pvd->getElement(i)->getType();
				break;
			}
		}
		if( source == - 1 || vtype != Ogre::VET_FLOAT3 ) //别的格式目前没有考虑
			return result;

		/*source对应与一个缓存区
		  getVertexSize(source)求缓存区中一个紧密数据包的大小
		  例如：一个数据包里面包括POSITION,COLOR,NORMAL,TEXCROOD然后在这个缓冲
			区中循环。而getVertexSize求出这个包的字节大小
		  例如POSITION(FLOAT3) TEXCROOD(FLOAT2) 这样前面的是12字节后面的是8字节
			getVertexSize返回20
		*/
		pkgsize = pvd->getVertexSize(source);

		Ogre::HardwareVertexBufferSharedPtr hvb = op.vertexData->vertexBufferBinding->getBuffer(source);
		Ogre::HardwareIndexBufferSharedPtr ivb = op.indexData->indexBuffer;
		Ogre::HardwareIndexBuffer::IndexType indexType = op.indexData->indexBuffer->getType();
		/*先将顶点数据复制一份，然后变换到世界坐标系
		*/
		vertexNums = hvb->getNumVertices();
		indexNums = ivb->getNumIndexes();
		 
		boost::scoped_array<float> vp( new float[3*vertexNums] );
		boost::scoped_array<unsigned int> ip( new unsigned int[indexNums] );
		
		{
			Ogre::Vector3 p3;
			Ogre::Matrix4 mat;
			rend->getWorldTransforms( &mat );
			float* preal = (float*)hvb->lock( Ogre::HardwareBuffer::HBL_READ_ONLY );
			float* ptarget = vp.get();
			//这里考虑到对齐，我假设offset和pkgsize都可以被sizeof(float)整除
			preal += offset/sizeof(float);
			size_t strip = pkgsize/sizeof(float);
			for( size_t i = 0; i < vertexNums;++i ){
				p3.x = *preal;
				p3.y = *(preal+1);
				p3.z = *(preal+2);
				p3 = mat * p3;
				*ptarget++ = p3.x;
				*ptarget++ = p3.y;
				*ptarget++ = p3.z;
				preal += strip;
			}
			hvb->unlock();
		}
		//拷贝出顶点数据
		
		{
			unsigned int* pindex32 = ip.get();
			
			if( indexType==Ogre::HardwareIndexBuffer::IT_16BIT ){
				unsigned short* pi16 = (unsigned short*)ivb->lock( Ogre::HardwareBuffer::HBL_READ_ONLY );
				copy( pi16,pi16+indexNums,pindex32 );
			}else
				memcpy( pindex32,ivb->lock( Ogre::HardwareBuffer::HBL_READ_ONLY ),ivb->getSizeInBytes() );
			ivb->unlock();
		}
		/*数据都准备好了，vp保存了变换好的顶点，ip保存了顶点索引
			下面根据情况求交点
		*/
		switch( op.operationType ){
			case Ogre::RenderOperation::OT_TRIANGLE_LIST:
				{ /* 0,1,2 组成一个三角 3,4,5 下一个...
				  */
					Ogre::Vector3 a[3],n;
					int index,k = 0;
					float* preal = vp.get();
					unsigned int* pindex = ip.get();
					for( size_t i = 0;i<indexNums;++i ){
						if( pindex[i] < vertexNums ){
							index = pindex[i]*3; //对应与格式VET_FLOAT3
							a[k].x = preal[index];
							a[k].y = preal[index+1];
							a[k].z = preal[index+2];
//.........这里部分代码省略.........

void GetTrianglesFromMesh(Ogre::Mesh* mesh, std::vector<float3>& dest)
{
    dest.clear();
    
    try
    {

    for(uint i = 0; i < mesh->getNumSubMeshes(); ++i)
    {
        Ogre::SubMesh* submesh = mesh->getSubMesh(i);
        
        Ogre::VertexData* vertex_data = submesh->useSharedVertices ? mesh->sharedVertexData : submesh->vertexData;
        const Ogre::VertexElement* posElem = vertex_data->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
        Ogre::HardwareVertexBufferSharedPtr vbuf = vertex_data->vertexBufferBinding->getBuffer(posElem->getSource());
        unsigned char* vertices = static_cast<unsigned char*>(vbuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
        size_t vertexSize = vbuf->getVertexSize();
        float* pReal = 0;
        
        Ogre::IndexData* index_data = submesh->indexData;
        size_t numTris = index_data->indexCount / 3;
        Ogre::HardwareIndexBufferSharedPtr ibuf = index_data->indexBuffer;
        u32*  pLong = static_cast<u32*>(ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
        u16* pShort = reinterpret_cast<u16*>(pLong);
        bool use32bitindexes = (ibuf->getType() == Ogre::HardwareIndexBuffer::IT_32BIT);
        
        if (use32bitindexes)
        {
            for(size_t k = 0; k < numTris * 3; k += 3)
            {
                uint i1 = pLong[k];
                uint i2 = pLong[k+1];
                uint i3 = pLong[k+2];
                
                posElem->baseVertexPointerToElement(vertices + i1 * vertexSize, &pReal);
                dest.push_back(float3(pReal[0], pReal[1], pReal[2]));
                    
                posElem->baseVertexPointerToElement(vertices + i2 * vertexSize, &pReal);
                dest.push_back(float3(pReal[0], pReal[1], pReal[2]));
                    
                posElem->baseVertexPointerToElement(vertices + i3 * vertexSize, &pReal);
                dest.push_back(float3(pReal[0], pReal[1], pReal[2]));
                

            }
        }
        else
        {
            for(size_t k = 0; k < numTris * 3; k += 3)
            {
                uint i1 = pShort[k];
                uint i2 = pShort[k+1];
                uint i3 = pShort[k+2];
                
                posElem->baseVertexPointerToElement(vertices + i1 * vertexSize, &pReal);
                dest.push_back(float3(pReal[0], pReal[1], pReal[2]));
                    
                posElem->baseVertexPointerToElement(vertices + i2 * vertexSize, &pReal);
                dest.push_back(float3(pReal[0], pReal[1], pReal[2]));
                    
                posElem->baseVertexPointerToElement(vertices + i3 * vertexSize, &pReal);
                dest.push_back(float3(pReal[0], pReal[1], pReal[2]));
            }
        }
        
        vbuf->unlock();
        ibuf->unlock();
    }

    } catch(Ogre::Exception &e)
    {
        ///\todo Fix Ogre to not allow meshes like this to be successfully created.
        LogError("GetTrianglesFromMesh failed for mesh! Ogre threw an exception: " + QString(e.what()));
        dest.clear();
    }
}

bool ShaderParticleRenderer::allocateBuffers(size_t iNumParticles)
{
    // prepare vertex declaration
    if (mVertexData->vertexDeclaration->getElementCount() == 0) {
        VertexDeclaration* pDecl = mVertexData->vertexDeclaration;
        size_t ofs = 0;
        ofs += pDecl->addElement(0, ofs, VET_FLOAT4, VES_POSITION).getSize();				// position
        if (mVertexFormatColour)
            ofs += pDecl->addElement(0, ofs, VET_FLOAT4, VES_DIFFUSE).getSize();			// diffuse colour

        // other data are stored in vertex as texture coordinates
        ushort ix = 0;
        if (mVertexFormatTexture)
            ofs += pDecl->addElement(0, ofs, VET_FLOAT2, VES_TEXTURE_COORDINATES, ix++).getSize();	// general texture coord

        if (mVertexFormatSize)
            ofs += pDecl->addElement(0, ofs, VET_FLOAT2, VES_TEXTURE_COORDINATES, ix++).getSize();	// particle size

        if (mVertexFormatRotation || mVertexFormatRotationSpeed) {
            if (mVertexFormatRotation && mVertexFormatRotationSpeed)
                ofs += pDecl->addElement(0, ofs, VET_FLOAT2, VES_TEXTURE_COORDINATES, ix++).getSize();	// current rotation and rotation speed
            else
                ofs += pDecl->addElement(0, ofs, VET_FLOAT1, VES_TEXTURE_COORDINATES, ix++).getSize();	// current rotation or rotation speed
        }

        if (mVertexFormatDirection)
            ofs += pDecl->addElement(0, ofs, VET_FLOAT3, VES_TEXTURE_COORDINATES, ix++).getSize();	// particle direction (as speed)

        // add packed times
        size_t iNumTimes = 0;
        if (mVertexFormatTTL) iNumTimes++;
        if (mVertexFormatTotalTTL) iNumTimes++;
        if (mVertexFormatTimeFragment) iNumTimes++;
        if (mVertexFormatTimeFragmentInv) iNumTimes++;
        switch(iNumTimes) {
            case 1:
                ofs += pDecl->addElement(0, ofs, VET_FLOAT1, VES_TEXTURE_COORDINATES, ix++).getSize();
                break;
            case 2:
                ofs += pDecl->addElement(0, ofs, VET_FLOAT2, VES_TEXTURE_COORDINATES, ix++).getSize();
                break;
            case 3:
                ofs += pDecl->addElement(0, ofs, VET_FLOAT3, VES_TEXTURE_COORDINATES, ix++).getSize();
                break;
            case 4:
                ofs += pDecl->addElement(0, ofs, VET_FLOAT4, VES_TEXTURE_COORDINATES, ix++).getSize();
                break;
        }

        // add custom parameters
        ofs += pDecl->addElement(0, ofs, VET_FLOAT4, VES_TEXTURE_COORDINATES, ix++).getSize();
        assert(ix <= 8);

        // cache vertex size
        mVertexSize = pDecl->getVertexSize(0);
    }

    Ogre::HardwareVertexBufferSharedPtr pVB;
    if (mVertexData->vertexBufferBinding->isBufferBound(0))
        pVB = mVertexData->vertexBufferBinding->getBuffer(0);

    // prepare vertex buffer
    if (pVB.isNull() || pVB->getNumVertices() < iNumParticles * 4) {
        assert(iNumParticles * 4 < 65536); // we are using 16bit index buffer
        pVB = Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(mVertexSize, 4 * iNumParticles, Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE);
        if (pVB.isNull())
            return false;

        mVertexData->vertexBufferBinding->setBinding(0, pVB);
    }

    // prepare index buffer
    Ogre::HardwareIndexBufferSharedPtr pIB = mIndexData->indexBuffer;
    if (pIB.isNull() || pIB->getNumIndexes() < iNumParticles * 6) {
        pIB = Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(Ogre::HardwareIndexBuffer::IT_16BIT, iNumParticles * 6, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
        if (pIB.isNull())
            return false;

        mIndexData->indexBuffer = pIB;

        // fill
        Ogre::uint16* pDataIB = reinterpret_cast<Ogre::uint16*>(pIB->lock(Ogre::HardwareBuffer::HBL_NORMAL));
        for (Ogre::uint16 k=0; k<static_cast<Ogre::uint16>(iNumParticles); ++k) {
            pDataIB[0] = k*4 + 0;
            pDataIB[1] = k*4 + 1;
            pDataIB[2] = k*4 + 2;

            pDataIB[3] = k*4 + 0;
            pDataIB[4] = k*4 + 2;
            pDataIB[5] = k*4 + 3;
            pDataIB += 6;
        }
        pIB->unlock();
    }

    return true;
}

// Get the mesh information for the given mesh.
// Code found on this forum link: http://www.ogre3d.org/wiki/index.php/RetrieveVertexData
void CollisionTools::GetMeshInformation(const Ogre::MeshPtr mesh,
                                size_t &vertex_count,
                                Ogre::Vector3* &vertices,
                                size_t &index_count,
                                Ogre::uint32* &indices,
                                const Ogre::Vector3 &position,
                                const Ogre::Quaternion &orient,
                                const Ogre::Vector3 &scale)
{
    bool added_shared = false;
    size_t current_offset = 0;
    size_t shared_offset = 0;
    size_t next_offset = 0;
    size_t index_offset = 0;

    vertex_count = index_count = 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 )
            {
                vertex_count += mesh->sharedVertexData->vertexCount;
                added_shared = true;
            }
        }
        else
        {
            vertex_count += submesh->vertexData->vertexCount;
        }

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


    // Allocate space for the vertices and indices
    vertices = new Ogre::Vector3[vertex_count];
    indices = new Ogre::uint32[index_count];

    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);

            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::Ogre::Real or a double
            //  as second argument. So make it float, to avoid trouble when Ogre::Ogre::Real will
            //  be comiled/typedefed as double:
            //      Ogre::Ogre::Real* pOgre::Real;
            float* pReal;

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

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

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

            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);

        Ogre::uint32*  pLong = static_cast<Ogre::uint32*>(ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
//.........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
}

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();
}

Mesh loadMesh(const std::string& meshName)
{
	Mesh result;

	bool addedShared = false;
	size_t currentOffset = 0;
	size_t sharedOffset = 0;
	size_t nextOffset = 0;
	size_t indexOffset = 0;

	const v3 scale        = v3::UNIT_SCALE;
	const v3 position     = v3::ZERO;
	const qv4 orientation = qv4::IDENTITY;

	Ogre::MeshManager* mm = Ogre::MeshManager::getSingletonPtr();
	assert(mm && "Ogre must be initialized");

	//! \todo check for mesh existance.
	Ogre::MeshPtr mesh = mm->load(meshName, "General");

	// Calculate how many result.mVertices and result.mIndices 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 result.mVertices once
		if (subMesh->useSharedVertices)
		{
			if (!addedShared)
			{
				result.mVertexCount += mesh->sharedVertexData->vertexCount;
				addedShared = true;
			}
		}
		else
		{
			result.mVertexCount += subMesh->vertexData->vertexCount;
		}

		result.mIndexCount += subMesh->indexData->indexCount;
	}

	result.mVertices.reset(new v3[result.mVertexCount]);
	result.mIndices.reset(new u32[result.mIndexCount]);

	addedShared = false;

	// Run through the sub-meshes again, adding the data into the arrays
	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 && !addedShared))
		{
			if(subMesh->useSharedVertices)
			{
				addedShared = true;
				sharedOffset = 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));

			// 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 compiled/typedefed as double:

			float* pReal;

			for( size_t j = 0; j < vertexData->vertexCount; ++j, vertex += vbuf->getVertexSize())
			{
				posElem->baseVertexPointerToElement(vertex, &pReal);
				v3 pt(pReal[0], pReal[1], pReal[2]);
				result.mVertices[currentOffset + j] = (orientation * (pt * scale)) + position;
			}

			vbuf->unlock();
			nextOffset += vertexData->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)? sharedOffset : currentOffset;

		if (use32bitindexes)
//.........这里部分代码省略.........

	//-----------------------------------------------------------------------
	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.........

//.........这里部分代码省略.........
      {
        vertex_count += submesh->vertexData->vertexCount;
      }

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


    // Allocate space for the vertices and indices
    vertices = new Ogre::Vector3[vertex_count];
    indices = new Ogre::uint32[index_count];

    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);

      //----------------------------------------------------------------
      // GET VERTEXDATA
      //----------------------------------------------------------------
      Ogre::VertexData* vertex_data;

      //When there is animation:
      if(useSoftwareBlendingVertices)
        vertex_data = submesh->useSharedVertices ? entity->_getSkelAnimVertexData() : entity->getSubEntity(i)->_getSkelAnimVertexData();
      else
        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 j = 0; j < vertex_data->vertexCount; ++j, vertex += vbuf->getVertexSize())
        {
          posElem->baseVertexPointerToElement(vertex, &pReal);

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

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

        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);

      void* hwBuf = ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY);

      size_t offset = (submesh->useSharedVertices)? shared_offset : current_offset;
      size_t index_start = index_data->indexStart;
      size_t last_index = numTris*3 + index_start;

      if (use32bitindexes) {
        Ogre::uint32* hwBuf32 = static_cast<Ogre::uint32*>(hwBuf);
        for (size_t k = index_start; k < last_index; ++k)
        {
          indices[index_offset++] = hwBuf32[k] + static_cast<Ogre::uint32>( offset );
        }
      } else {
        Ogre::uint16* hwBuf16 = static_cast<Ogre::uint16*>(hwBuf);
        for (size_t k = index_start; k < last_index; ++k)
        {
          indices[ index_offset++ ] = static_cast<Ogre::uint32>( hwBuf16[k] ) +
            static_cast<Ogre::uint32>( offset );
        }
      }

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

Rocket::Core::CompiledGeometryHandle RocketInterface::CompileGeometry(
    Rocket::Core::Vertex* vertices, int numVertices, int* indices, int numIndices,
    Rocket::Core::TextureHandle texture)
{
    RocketOgreGeometry* geometry = new RocketOgreGeometry();
    geometry->texture = texture == 0 ? nullptr : reinterpret_cast<RocketOgreTexture*>(texture);
    geometry->renderOp.vertexData = new Ogre::VertexData();
    geometry->renderOp.vertexData->vertexStart = 0;
    geometry->renderOp.vertexData->vertexCount = numVertices;
    geometry->renderOp.indexData = new Ogre::IndexData();
    geometry->renderOp.indexData->indexStart = 0;
    geometry->renderOp.indexData->indexCount = numIndices;
    geometry->renderOp.operationType = Ogre::RenderOperation::OT_TRIANGLE_LIST;

    // Set up the vertex declaration
    Ogre::VertexDeclaration* vertexDecl = geometry->renderOp.vertexData->vertexDeclaration;
    size_t offset = 0;
    vertexDecl->addElement(0, offset, Ogre::VET_FLOAT2, Ogre::VES_POSITION);
    offset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT2);
    vertexDecl->addElement(0, offset, Ogre::VET_COLOUR, Ogre::VES_DIFFUSE);
    offset += Ogre::VertexElement::getTypeSize(Ogre::VET_COLOUR);
    vertexDecl->addElement(0, offset, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES);

    // Create the vertex buffer
    Ogre::HardwareVertexBufferSharedPtr vb =
        Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
            vertexDecl->getVertexSize(0), numVertices, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
    geometry->renderOp.vertexData->vertexBufferBinding->setBinding(0, vb);

    // Fill the vertex buffer
    RocketOgreVertex* vertexData = static_cast<RocketOgreVertex*>(
        vb->lock(0, vb->getSizeInBytes(), Ogre::HardwareBuffer::HBL_NORMAL));
    for (int i = 0; i < numVertices; ++i)
    {
        vertexData[i].position.x = vertices[i].position.x;
        vertexData[i].position.y = vertices[i].position.y;

        vertexData[i].uv.x = vertices[i].tex_coord[0];
        vertexData[i].uv.y = vertices[i].tex_coord[1];

        // Calculate colour value
        Ogre::ColourValue diffuse(
            vertices[i].colour.red / 255.0f, vertices[i].colour.green / 255.0f,
            vertices[i].colour.blue / 255.0f, vertices[i].colour.alpha / 255.0f);

        // Scale colour by gamma value (2.2)
        diffuse.r = Pow(diffuse.r, 2.2f);
        diffuse.g = Pow(diffuse.g, 2.2f);
        diffuse.b = Pow(diffuse.b, 2.2f);
        diffuse.a = Pow(diffuse.a, 2.2f);

        mRenderSystem->convertColourValue(diffuse, &vertexData[i].colour);
    }
    vb->unlock();

    // Create the index buffer
    Ogre::HardwareIndexBufferSharedPtr ib =
        Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(
            Ogre::HardwareIndexBuffer::IT_32BIT, numIndices,
            Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
    geometry->renderOp.indexData->indexBuffer = ib;
    geometry->renderOp.useIndexes = true;

    // Fill the index buffer
    void* indexData = ib->lock(0, ib->getSizeInBytes(), Ogre::HardwareBuffer::HBL_NORMAL);
    memcpy(indexData, indices, sizeof(unsigned int) * numIndices);
    ib->unlock();

    return reinterpret_cast<Rocket::Core::CompiledGeometryHandle>(geometry);
}

//.........这里部分代码省略.........

	// 创建纹理坐标顶点缓冲区
	Ogre::HardwareVertexBufferSharedPtr vbufUV =
		Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
		vdecl->getVertexSize(VERTEX_UV_BINDING),
		numVertices,
		Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY);
	vbind->setBinding(VERTEX_UV_BINDING, vbufUV);

	// 创建索引缓冲区
	Ogre::HardwareIndexBufferSharedPtr indexBuffer =
		Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(
		Ogre::HardwareIndexBuffer::IT_16BIT ,
		numIndex,
		Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);

	//创建地形
	float* pBufferPos = (float*)vbufPos->lock(Ogre::HardwareBuffer::HBL_DISCARD);
	float* pBufferUV = (float*)vbufUV->lock(Ogre::HardwareBuffer::HBL_DISCARD);
	float* pBufferNom = (float*)vbufNOM->lock(Ogre::HardwareBuffer::HBL_DISCARD);

	float startpos = - terrainszie * TILESIZE / 2;
	for(int y = 0 ; y < terrainszie; y ++)
	{
		for(int x = 0 ; x < terrainszie; x ++)
		{
			createTile(x, y, startpos + x * TILESIZE, startpos + y * TILESIZE, pBufferPos, pBufferUV, pBufferNom);
			pBufferPos += 3 * VERTEX_QUAD ;
			pBufferNom += 3 * VERTEX_QUAD ;
			pBufferUV += 2 * VERTEX_QUAD * 4;
		}
	}

	vbufNOM->unlock();
	vbufUV->unlock();
	vbufPos->unlock();

	//写入索引信息
	// 锁定索引缓冲区
	Ogre::ushort* pIdx = (Ogre::ushort*)indexBuffer->lock(Ogre::HardwareBuffer::HBL_DISCARD);
	for(int y = 0 ; y < terrainszie ; y ++)
	{
		for(int x = 0 ; x < terrainszie ; x ++)
		{
			Ogre::ushort iIndexTopLeft = (x + y * terrainszie) * VERTEX_QUAD;
			Ogre::ushort iIndexTopRight = iIndexTopLeft + 1;
			Ogre::ushort iIndexBottomLeft = iIndexTopLeft + 2;
			Ogre::ushort iIndexBottomRight = iIndexTopLeft + 3;
			*pIdx++ = iIndexBottomLeft;
			*pIdx++ = iIndexBottomRight;
			*pIdx++ = iIndexTopLeft;

			*pIdx++ = iIndexBottomRight;
			*pIdx++ = iIndexTopRight;
			*pIdx++ = iIndexTopLeft;
		}
	}
	indexBuffer->unlock();
	//设置模型的的索引数据
	subMesh->indexData->indexBuffer = indexBuffer;
	subMesh->indexData->indexStart = 0;
	subMesh->indexData->indexCount =numIndex;

	Ogre::AxisAlignedBox meshBounds(startpos,0,startpos,
		-startpos,5,-startpos);
	mTerrainMesh->_setBounds(meshBounds);