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

	void IndexBuffer::AddFromIndexData(Ogre::IndexData* indexData, const unsigned int offset)
	{
		// Get vertex count
		const unsigned int addedCount = indexData->indexCount;

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

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

		if (use32bitindexes) 
		{
			const unsigned int* curIndex = static_cast<unsigned int*>
				(hardwareBuffer->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
			for(unsigned int k = 0; k < addedCount; ++k)
			{
				_buffer.push_back(offset + (*curIndex++));
			}
		}
		else
		{
			const unsigned short* curIndex = static_cast<unsigned short*>
				(hardwareBuffer->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
			for(unsigned int k = 0; k < addedCount; ++k)
			{
				_buffer.push_back(offset + static_cast<unsigned int>(*curIndex++));
			}
		}
		_size = _buffer.size();
		hardwareBuffer->unlock();
	}

void processIndexData(IndexData* indexData)
{
	if (!mFlipVertexWinding)
	{
		// Nothing to do.
		return;
	}

	if (indexData->indexCount % 3 != 0)
	{
        printf("Index number is not a multiple of 3, no vertex winding flipping possible. Skipped.");
        return;
	}

	//print("Flipping index order for vertex winding flipping.", V_HIGH);
	Ogre::HardwareIndexBufferSharedPtr buffer = indexData->indexBuffer;
	unsigned char* data = static_cast<unsigned char*>(buffer->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));

	if(buffer->getType() == Ogre::HardwareIndexBuffer::IT_16BIT)
	{
		// 16 bit
		//print("using 16bit indices", V_HIGH);

		for (size_t i = 0; i < indexData->indexCount; i+=3)
		{
			Ogre::uint16 * i0 = (Ogre::uint16*)(data+0 * buffer->getIndexSize());
			Ogre::uint16* i2 = (Ogre::uint16*)(data+2 * buffer->getIndexSize());

			// flip
			Ogre::uint16 tmp = *i0;
			*i0 = *i2;
			*i2 = tmp;

			data += 3 * buffer->getIndexSize();
		}
	}
	else
	{
		// 32 bit
		//print("using 32bit indices", V_HIGH);

		for (size_t i = 0; i < indexData->indexCount; i+=3)
		{
			Ogre::uint32* i0 = (Ogre::uint32*)(data+0 * buffer->getIndexSize());
			Ogre::uint32* i2 = (Ogre::uint32*)(data+2 * buffer->getIndexSize());

			// flip
			Ogre::uint32 tmp = *i0;
			*i0 = *i2;
			*i2 = tmp;

			data += 3 * buffer->getIndexSize();
		}
	}

	buffer->unlock();
}

	//------------------------------------------------------------------------------------------------
	void VertexIndexToShape::addIndexData(Ogre::IndexData *data, const unsigned int offset)
	{
		const unsigned int prev_size = mIndexCount;
		mIndexCount += (unsigned int)data->indexCount;

		unsigned int* tmp_ind = new unsigned int[mIndexCount];
		if (mIndexBuffer)
		{
			memcpy (tmp_ind, mIndexBuffer, sizeof(unsigned int) * prev_size);
			delete[] mIndexBuffer;
		}
		mIndexBuffer = tmp_ind;

		const unsigned int numTris = (unsigned int) data->indexCount / 3;
		Ogre::HardwareIndexBufferSharedPtr ibuf = data->indexBuffer;
		const bool use32bitindexes = (ibuf->getType() == Ogre::HardwareIndexBuffer::IT_32BIT);
		unsigned int index_offset = prev_size;

		if (use32bitindexes)
		{
			const unsigned int* pInt = static_cast<unsigned int*>(ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
			for(unsigned int k = 0; k < numTris; ++k)
			{
				mIndexBuffer[index_offset ++] = offset + *pInt++;
				mIndexBuffer[index_offset ++] = offset + *pInt++;
				mIndexBuffer[index_offset ++] = offset + *pInt++;
			}
			ibuf->unlock();
		}
		else
		{
			const unsigned short* pShort = static_cast<unsigned short*>(ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
			for(unsigned int k = 0; k < numTris; ++k)
			{
				mIndexBuffer[index_offset ++] = offset + static_cast<unsigned int> (*pShort++);
				mIndexBuffer[index_offset ++] = offset + static_cast<unsigned int> (*pShort++);
				mIndexBuffer[index_offset ++] = offset + static_cast<unsigned int> (*pShort++);
			}
			ibuf->unlock();
		}

	}

//.........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;
    }
  }

// 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.........

void OgreMeshRay::GetMeshInformation(const Ogre::ManualObject* manual,
		size_t& vertex_count, Ogre::Vector3*& vertices, size_t& index_count,
		unsigned long*& indices, const Ogre::Vector3& position,
		const Ogre::Quaternion& orient, const Ogre::Vector3& scale) {
	std::vector<Ogre::Vector3> returnVertices;
	std::vector<unsigned long> returnIndices;
	unsigned long thisSectionStart = 0;
	for (unsigned int i = 0, size = manual->getNumSections(); i < size; ++i) {
		Ogre::ManualObject::ManualObjectSection* section = manual->getSection(
				i);
		Ogre::RenderOperation* renderOp = section->getRenderOperation();

		std::vector<Ogre::Vector3> pushVertices;
		//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 = static_cast<char*>(vertexBuffer->lock(
					Ogre::HardwareBuffer::HBL_READ_ONLY));
			float* positionArrayHolder;

			thisSectionStart = returnVertices.size() + pushVertices.size();

			pushVertices.reserve(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;
				pushVertices.push_back(vertexPos);
			}

			vertexBuffer->unlock();
		}
		//Collect the indices
		{
			if (renderOp->useIndexes) {
				Ogre::HardwareIndexBufferSharedPtr indexBuffer =
						renderOp->indexData->indexBuffer;

				if (indexBuffer.isNull()
						|| renderOp->operationType
								!= Ogre::RenderOperation::OT_TRIANGLE_LIST) {
					//No triangles here, so we just drop the collected vertices and move along to the next section.
					continue;
				} else {
					returnVertices.reserve(
							returnVertices.size() + pushVertices.size());
					returnVertices.insert(returnVertices.end(),
							pushVertices.begin(), pushVertices.end());
				}

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

				returnIndices.reserve(
						returnIndices.size() + renderOp->indexData->indexCount);

				for (size_t j = 0; j < renderOp->indexData->indexCount; ++j) {
					unsigned long index;
					//We also have got to remember that for a multi section object, each section has
					//different vertices, so the indices will not be correct. To correct this, we
					//have to add the position of the first vertex in this section to the index

					//(At least I think so...)
					if (indexBuffer->getType()
							== Ogre::HardwareIndexBuffer::IT_32BIT)
						index = static_cast<unsigned long>(pLong[j])
								+ thisSectionStart;
					else
						index = static_cast<unsigned long>(pShort[j])
								+ thisSectionStart;

					returnIndices.push_back(index);
				}

				indexBuffer->unlock();
			}
		}
	}

	//Now we simply return the data.
	index_count = returnIndices.size();
	vertex_count = returnVertices.size();
	vertices = new Ogre::Vector3[vertex_count];
	for (unsigned long i = 0; i < vertex_count; ++i)
		vertices[i] = returnVertices[i];
	indices = new unsigned long[index_count];
//.........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;
        }
    }

void OgreMeshAsset::CreateKdTree()
{
    meshData.Clear();
    normals.clear();
    uvs.clear();
    subMeshTriangleCounts.clear();
    for(unsigned short i = 0; i < ogreMesh->getNumSubMeshes(); ++i)
    {
        Ogre::SubMesh *submesh = ogreMesh->getSubMesh(i);
        assert(submesh);
        
        Ogre::VertexData *vertexData = submesh->useSharedVertices ? ogreMesh->sharedVertexData : submesh->vertexData;
        assert(vertexData);
        
        const Ogre::VertexElement *posElem = vertexData->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
        if (!posElem)
        {
            subMeshTriangleCounts.push_back(0);
            continue; // No position element. Ignore this submesh.
        }
        
        Ogre::HardwareVertexBufferSharedPtr vbufPos = vertexData->vertexBufferBinding->getBuffer(posElem->getSource());

        unsigned char *pos = (unsigned char*)vbufPos->lock(Ogre::HardwareBuffer::HBL_READ_ONLY);
        assert(pos);
        size_t posOffset = posElem->getOffset();
        size_t posSize = vbufPos->getVertexSize();
        
        // Texcoord element is not mandatory
        unsigned char *texCoord = 0;
        size_t texOffset = 0;
        size_t texSize = 0;
        Ogre::HardwareVertexBufferSharedPtr vbufTex;
        const Ogre::VertexElement *texElem = vertexData->vertexDeclaration->findElementBySemantic(Ogre::VES_TEXTURE_COORDINATES);
        if (texElem)
        {
            vbufTex = vertexData->vertexBufferBinding->getBuffer(texElem->getSource());
            // Check if the texcoord buffer is different than the position buffer, in that case lock it separately
            if (vbufTex != vbufPos)
                texCoord = static_cast<unsigned char*>(vbufTex->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
            else
                texCoord = pos;
            texOffset = texElem->getOffset();
            texSize = vbufTex->getVertexSize();
        }
        
        Ogre::IndexData *indexData = submesh->indexData;
        Ogre::HardwareIndexBufferSharedPtr ibuf = indexData->indexBuffer;

        u32 *pLong = (u32*)ibuf->lock(Ogre::HardwareBuffer::HBL_READ_ONLY);
        u16 *pShort = (u16*)pLong;
        const bool use32BitIndices = (ibuf->getType() == Ogre::HardwareIndexBuffer::IT_32BIT);
        
        for(unsigned j = 0; j+2 < indexData->indexCount; j += 3)
        {
            unsigned i0, i1, i2;
            if (use32BitIndices)
            {
                i0 = pLong[j];
                i1 = pLong[j+1];
                i2 = pLong[j+2];
            }
            else
            {
                i0 = pShort[j];
                i1 = pShort[j+1];
                i2 = pShort[j+2];
            }
            
            float3 v0 = *(float3*)(pos + posOffset + i0 * posSize);
            float3 v1 = *(float3*)(pos + posOffset + i1 * posSize);
            float3 v2 = *(float3*)(pos + posOffset + i2 * posSize);
            Triangle t(v0, v1, v2);
            meshData.AddObjects(&t, 1);

            if (texElem)
            {
                uvs.push_back(*((float2*)(texCoord + texOffset + i0 * texSize)));
                uvs.push_back(*((float2*)(texCoord + texOffset + i1 * texSize)));
                uvs.push_back(*((float2*)(texCoord + texOffset + i2 * texSize)));
            }

            float3 edge1 = v1 - v0;
            float3 edge2 = v2 - v0;
            float3 normal = edge1.Cross(edge2);
            normal.Normalize();
            normals.push_back(normal);
        }
        subMeshTriangleCounts.push_back((int)(indexData->indexCount / 3));
        
        vbufPos->unlock();
        if (!vbufTex.isNull() && vbufTex != vbufPos)
            vbufTex->unlock();
        ibuf->unlock();
    }

    {
        PROFILE(OgreMeshAsset_KdTree_Build);
        meshData.Build();
    }
//.........这里部分代码省略.........

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.........

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 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.........

        mesh::mesh(const std::string &mn, const mat4 &tf, const world &_world):
        /** Don't know if world() is the best thing to pass but it works for now **/
            _mesh(NewtonMeshCreate(_world))
        {
            Ogre::MeshPtr meshPtr;
            try
            {
                meshPtr = Ogre::MeshPtr(Ogre::MeshManager::getSingleton().load(mn,
                    Ogre::ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME));
            }
            catch(...)
            {
                return;
            }

            const Ogre::Mesh &mesh = *meshPtr;

            NewtonMeshBeginFace(_mesh);

            for (unsigned smi = 0; smi < mesh.getNumSubMeshes(); smi++) {
                Ogre::SubMesh *subMesh = mesh.getSubMesh(smi);

                Ogre::VertexData *vertexData =
                    (subMesh->useSharedVertices) ?
                        vertexData = mesh.sharedVertexData : vertexData = subMesh->vertexData;

                Ogre::VertexDeclaration *vertexDecl = vertexData->vertexDeclaration;
                const Ogre::VertexElement *element = vertexDecl->findElementBySemantic(Ogre::VES_POSITION);

                Ogre::HardwareVertexBufferSharedPtr vertexHVBSP =
                    vertexData->vertexBufferBinding->getBuffer(element->getSource());
                unsigned char *vPtr = (unsigned char*)(vertexHVBSP->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));

                Ogre::IndexData *indexData = subMesh->indexData;
                size_t numIndices = indexData->indexCount;
                size_t numTris = numIndices / 3;

                // get pointer!
                Ogre::HardwareIndexBufferSharedPtr indexHIBSP = indexData->indexBuffer;

                // 16 or 32 bit indices?
                bool indicesAre32Bit = (indexHIBSP->getType() == Ogre::HardwareIndexBuffer::IT_32BIT);
                unsigned long *longPtr = NULL;
                unsigned short *shortPtr = NULL;

                if (indicesAre32Bit)
                    longPtr = static_cast<unsigned long*>(
                        indexHIBSP->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
                else
                    shortPtr = static_cast<unsigned short*>(
                        indexHIBSP->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));

                //now loop through the indices, getting polygon info!
                int iOffset = 0;

                for (size_t i = 0; i < numTris; i++) {
                    vec3 triVertices[3];
                    unsigned char *vOffset = NULL;
                    float *vertexPosPtr = NULL;
                    int idx = 0;

                    for (int j = 0; j < 3; j++) {
                        if (indicesAre32Bit)
                            idx = longPtr[iOffset + j];
                        else
                            idx = shortPtr[iOffset + j];

                        vOffset = vPtr + (idx * vertexHVBSP->getVertexSize());
                        element->baseVertexPointerToElement(vOffset, &vertexPosPtr);

                        triVertices[j].x = *vertexPosPtr; vertexPosPtr++;
                        triVertices[j].y = *vertexPosPtr; vertexPosPtr++;
                        triVertices[j].z = *vertexPosPtr; vertexPosPtr++;

                        triVertices[j] = tf * triVertices[j];
                    }

                    // _mesh, 3 vertices (triangle), (float = 4 bytes) * 3
                    // index = index of sub mesh (easy to recognize)
                    NewtonMeshAddFace(_mesh, 3, &triVertices[0].x, sizeof(float) * 3, smi);

                    iOffset += 3;
                }

                //unlock the buffers!
                vertexHVBSP->unlock();
                indexHIBSP->unlock();
            }

            NewtonMeshEndFace(_mesh);
        }

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();
	
	if (! mm)
	{
		initOgreForMeshLoading();
		mm = Ogre::MeshManager::getSingletonPtr();
	}

	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);

//.........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();
    }
}