C++ (Cpp) GLProgramState::applyAttributes示例

void MeshCommand::buildVAO()
{
    // FIXME: Assumes that all the passes in the Material share the same Vertex Attribs
    GLProgramState* programState = (_material != nullptr)
                                   ? _material->_currentTechnique->_passes.at(0)->getGLProgramState()
                                   : _glProgramState;

    releaseVAO();
    glGenVertexArrays(1, &_vao);
    GL::bindVAO(_vao);
    glBindBuffer(GL_ARRAY_BUFFER, _vertexBuffer);
    auto flags = programState->getVertexAttribsFlags();
    for (int i = 0; flags > 0; i++) {
        int flag = 1 << i;
        if (flag & flags)
            glEnableVertexAttribArray(i);
        flags &= ~flag;
    }
    programState->applyAttributes(false);

    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _indexBuffer);

    GL::bindVAO(0);
    glBindBuffer(GL_ARRAY_BUFFER, 0);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}

示例#2

显示文件

文件： CCMeshCommand.cpp 项目： Alprog/LHR2

void MeshCommand::preBatchDraw()
{
    // Do nothing if using material since each pass needs to bind its own VAO
    if (!_material)
    {
        if (Configuration::getInstance()->supportsShareableVAO() && _vao == 0)
            buildVAO();
        if (_vao)
        {
            GL::bindVAO(_vao);
        }
        else
        {
            glBindBuffer(GL_ARRAY_BUFFER, _vertexBuffer);

            // FIXME: Assumes that all the passes in the Material share the same Vertex Attribs
            GLProgramState* programState = _material
                                           ? _material->_currentTechnique->_passes.at(0)->getGLProgramState()
                                           : _glProgramState;
            programState->applyAttributes();
            glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _indexBuffer);
        }
    }
}