// Project screen coordinates to object coordinates.
func Unproject(wx, wy, wz float64, model, proj []float64, view []int32) (objx, objy, objz float64) {
var ox, oy, oz C.GLdouble
C.gluUnProject(
C.GLdouble(wx), C.GLdouble(wy), C.GLdouble(wz), (*C.GLdouble)(&model[0]),
(*C.GLdouble)(&proj[0]), (*C.GLint)(&view[0]), &ox, &oy, &oz,
)
return float64(ox), float64(oy), float64(oz)
}
func UnProject(winX, winY, winZ float64, model, proj *[16]float64, view *[4]int32) (float64, float64, float64) {
var ox, oy, oz C.GLdouble
m := (*C.GLdouble)(unsafe.Pointer(model))
p := (*C.GLdouble)(unsafe.Pointer(proj))
v := (*C.GLint)(unsafe.Pointer(view))
C.gluUnProject(
C.GLdouble(winX),
C.GLdouble(winY),
C.GLdouble(winZ),
m,
p,
v,
&ox,
&oy,
&oz,
)
return float64(ox), float64(oy), float64(oz)
}