func (c *Camera) unproject(pt mgl32.Vec2) mgl32.Vec2 {
var (
screen = pt.Vec4(1, 1)
out mgl32.Vec4
)
out = c.Inverse.Mul4x1(screen)
out = out.Mul(1.0 / out[3])
return out.Vec2()
}
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
}