Method bindVertexElementToGpu

RenderSystems/GL3Plus/src/OgreGL3PlusRenderSystem.cpp:1654–1710

    }

    void GL3PlusRenderSystem::bindVertexElementToGpu(const VertexElement& elem,
                                                     const HardwareVertexBufferSharedPtr& vertexBuffer,
                                                     const size_t vertexStart)
    {
        VertexElementSemantic sem = elem.getSemantic();
        unsigned short elemIndex = elem.getIndex();

        GLuint attrib = (GLuint)GLSLProgramCommon::getFixedAttributeIndex(sem, elemIndex);

        const GL3PlusHardwareBuffer* hwGlBuffer = vertexBuffer->_getImpl<GL3PlusHardwareBuffer>();
        mStateCacheManager->bindGLBuffer(GL_ARRAY_BUFFER, hwGlBuffer->getGLBufferId());
        void* pBufferData = VBO_BUFFER_OFFSET(elem.getOffset() + vertexStart * vertexBuffer->getVertexSize());

        if (vertexBuffer->isInstanceData())
        {
            OGRE_CHECK_GL_ERROR(glVertexAttribDivisor(attrib, vertexBuffer->getInstanceDataStepRate()));
        }

        unsigned short typeCount = VertexElement::getTypeCount(elem.getType());
        GLboolean normalised = GL_FALSE;
        switch(elem.getType())
        {
        case VET_UBYTE4_NORM:
        case VET_SHORT2_NORM:
        case VET_USHORT2_NORM:
        case VET_SHORT4_NORM:
        case VET_USHORT4_NORM:
        case VET_INT_10_10_10_2_NORM:
            normalised = GL_TRUE;
            break;
        default:
            break;
        };

        switch(elem.getBaseType(elem.getType()))
        {
        default:
        case VET_FLOAT1:
            OGRE_CHECK_GL_ERROR(glVertexAttribPointer(attrib,
                                                      typeCount,
                                                      GL3PlusHardwareBufferManager::getGLType(elem.getType()),
                                                      normalised,
                                                      static_cast<GLsizei>(vertexBuffer->getVertexSize()),
                                                      pBufferData));
            break;
        case VET_DOUBLE1:
            OGRE_CHECK_GL_ERROR(glVertexAttribLPointer(attrib,
                                                       typeCount,
                                                       GL3PlusHardwareBufferManager::getGLType(elem.getType()),
                                                       static_cast<GLsizei>(vertexBuffer->getVertexSize()),
                                                       pBufferData));
            break;
        }

        // If this attribute hasn't been enabled, do so and keep a record of it.
        OGRE_CHECK_GL_ERROR(glEnableVertexAttribArray(attrib));
    }
#if OGRE_NO_QUAD_BUFFER_STEREO == 0