pub type PFN_glReplacementCodeuiTexCoord2fNormal3fVertex3fSUN = unsafe extern "system" fn(_rc: GLuint, _s: GLfloat, _t: GLfloat, _nx: GLfloat, _ny: GLfloat, _nz: GLfloat, _x: GLfloat, _y: GLfloat, _z: GLfloat);