def test_decompose(self):
#normal vector
self.v.normalize()
#change d to something thats not parallel to v
self.d.y = 1
#expected parallel vector
respara = Vector2D()
respara.x = respara.y = 1.5
#expected perpendicullar vector
resperp = Vector2D()
resperp.x = 0.5
resperp.y = -0.5
para, perp = Vector2D.decompose(self.d, self.v)
self.assertAlmostEqual(para, respara)
self.assertAlmostEqual(perp, resperp)
def test_distance(self):
dist = Vector2D.distance(self.v, self.d)
self.assertAlmostEqual(dist, 4.242640687)
def test_dot(self):
self.assertEqual(Vector2D.dot(self.v, self.d), 20)
def test_as_normalized(self):
z = Vector2D.asNormalized(self.v)
self.assertAlmostEqual(z.magnitude(), 1.0)