C++学习（三零八）osg::Geometry的顶点数据上传到GPU的过程

Posted 2021-08-15 hankern

 

osg/VertexArrayState.cpp
inline void callVertexAttribPointer(GLExtensions* ext, const osg::Array* new_array, const GLvoid * ptr)
    {
        if (new_array->getPreserveDataType())
        {
            if (new_array->getDataType()==GL_FLOAT)
                ext->glVertexAttribPointer(static_cast<GLuint>(unit), new_array->getDataSize(), new_array->getDataType(), new_array->getNormalize(), 0, ptr);
            else if (new_array->getDataType()==GL_DOUBLE)
                ext->glVertexAttribLPointer(static_cast<GLuint>(unit), new_array->getDataSize(), new_array->getDataType(), 0, ptr);
            else
                ext->glVertexAttribIPointer(static_cast<GLuint>(unit), new_array->getDataSize(), new_array->getDataType(), 0, ptr);
        }
        else
        {
            ext->glVertexAttribPointer(static_cast<GLuint>(unit), new_array->getDataSize(), new_array->getDataType(), new_array->getNormalize(), 0, ptr);
        }
    }