def test_single_1(self):
points = np.array([[0, 0, 0], [1, 1, 0], [2, 0, 0]])
kv = sv_knotvector.generate(2, 3)
weights = [1, 1, 1]
curve = SvNativeNurbsCurve(2, kv, points, weights)
t = 0.5
result = curve.evaluate(t)
#print(result)
expected = np.array([1, 0.5, 0])
self.assert_numpy_arrays_equal(result, expected, precision=6)
def test_split_3(self):
points = np.array([[0, 0, 0], [1, 1, 0], [2, 1, 0], [3, 0, 0]])
weights = [1, 1, 1, 1]
degree = 2
knotvector = sv_knotvector.generate(degree, 4)
curve = SvNativeNurbsCurve(degree, knotvector, points, weights)
t0 = 0.5
curve1, curve2 = curve.split_at(t0)
#print("Kv1:", curve1.get_knotvector())
#print("Kv2:", curve2.get_knotvector())
pt1 = curve1.evaluate(0.25)
expected_pt1 = curve.evaluate(0.25)
self.assert_numpy_arrays_equal(pt1, expected_pt1, precision=4)
pt2 = curve2.evaluate(0.75)
expected_pt2 = curve.evaluate(0.75)
self.assert_numpy_arrays_equal(pt2, expected_pt2, precision=4)
def test_split_4(self):
points = np.array([[0, 0, 0], [1, 1, 0], [2, 0, 0], [3, 1, 0],
[4, 0, 0]])
degree = 3
knotvector = sv_knotvector.generate(degree, 5)
weights = [0.25, 1, 4.9, 2.35, 1]
#weights = [1, 1, 1, 1, 1]
curve = SvNativeNurbsCurve(degree, knotvector, points, weights)
curve1, curve2 = curve.split_at(0.501)
#print("Kv1:", curve1.get_knotvector())
#print("Kv2:", curve2.get_knotvector())
pt1 = curve1.evaluate(0.25)
expected_pt1 = curve.evaluate(0.25)
self.assert_numpy_arrays_equal(pt1, expected_pt1, precision=4)
pt2 = curve2.evaluate(0.75)
expected_pt2 = curve.evaluate(0.75)
self.assert_numpy_arrays_equal(pt2, expected_pt2, precision=4)