func main() { v1 := go4game.Vector3D{0, 0, 0} v2 := go4game.Vector3D{1, -1, 1} d8 := v1.To8Direct(v2) fmt.Printf("%v %v %v\n", v1, v2, d8) hr := go4game.HyperRect{ go4game.Vector3D{-10, -10, -10}, go4game.Vector3D{10, 10, 10}, } nhr := hr.MakeCubeBy8Driect(v1, d8) fmt.Printf("%v %v %v isin %v\n", hr, nhr, d8, v2.IsIn(nhr)) }