func PolygonOffset(factor float32, units float32) {
	syscall.Syscall(gpPolygonOffset, 2, uintptr(math.Float32bits(factor)), uintptr(math.Float32bits(units)), 0)
}
func PolygonOffset(factor float32, units float32) {
	syscall.Syscall(gpPolygonOffset, 2, uintptr(math.Float32bits(factor)), uintptr(math.Float32bits(units)), 0)
}
func PolygonOffset ( factor float32 , units float32 ) { syscall . Syscall ( gpPolygonOffset , 2 , uintptr ( math . Float32bits ( factor ) ) , uintptr ( math . Float32bits ( units ) ) , 0 ) }
// set the scale and units used to calculate depth values
set the scale and units used to calculate depth values