Type Definition glu_sys::glu::PFNGLTEXCOORD2FNORMAL3FVERTEX3FSUNPROC

type PFNGLTEXCOORD2FNORMAL3FVERTEX3FSUNPROC = Option<unsafe extern "C" fn(s: GLfloat, t: GLfloat, nx: GLfloat, ny: GLfloat, nz: GLfloat, x: GLfloat, y: GLfloat, z: GLfloat)>;