func Unproject(invproj mgl32.Mat4, x float32, y float32) (wx, wy float32) {
var (
screen = mgl32.Vec4{x, y, 1, 1}
out mgl32.Vec4
)
out = invproj.Mul4x1(screen)
out = out.Mul(1.0 / out[3])
wx = out[0]
wy = out[1]
return
}
func Project(proj mgl32.Mat4, x float32, y float32) (sx, sy float32) {
var out mgl32.Vec4
out = proj.Mul4x1(mgl32.Vec4{x, y, 1, 1})
return out[0], out[1]
}