Method RandomTangents

math32/vector3.go:643–668

RandomTangents computes and returns two arbitrary tangents to the vector.

()

// RandomTangents computes and returns two arbitrary tangents to the vector.
func (v *Vector3) RandomTangents() (*Vector3, *Vector3) {

	t1 := NewVector3(0, 0, 0)
	t2 := NewVector3(0, 0, 0)
	length := v.Length()
	if length > 0 {
		n := NewVector3(v.X/length, v.Y/length, v.Z/length)
		randVec := NewVector3(0, 0, 0)
		if Abs(n.X) < 0.9 {
			randVec.SetX(1)
			t1.CrossVectors(n, randVec)
		} else if Abs(n.Y) < 0.9 {
			randVec.SetY(1)
			t1.CrossVectors(n, randVec)
		} else {
			randVec.SetZ(1)
			t1.CrossVectors(n, randVec)
		}
		t2.CrossVectors(n, t1)
	} else {
		t1.SetX(1)
		t2.SetY(1)
	}

	return t1, t2
}

// TODO: implement similar methods for Vector2 and Vector4
// AlmostEquals returns whether the vector is almost equal to another vector within the specified tolerance.