def surf():
""" Generate surface for testing """
surf = spline.Surface()
surf.degree_u = 2
surf.degree_v = 2
surf.num_ctrlpts_u = 5
surf.num_ctrlpts_v = 5
x = np.arange(0.0, 5.0)
y = np.arange(0.0, 5.0)
ys, xs = np.meshgrid(x, y)
theta = np.linspace(0, 2 * np.pi, len(xs.flatten()))
z = np.sin(theta)
ctrlpt_array = np.column_stack((xs.flatten(), ys.flatten(), z))
surf.control_points = ctrlpt_array
uvec = knots.generate_uniform(surf.degree_u, surf.num_ctrlpts_u)
vvec = knots.generate_uniform(surf.degree_v, surf.num_ctrlpts_v)
surf.knot_vector_u = uvec
surf.knot_vector_v = vvec
return surf
def test_knot_vector_v(surf):
vvec = knots.generate_uniform(surf.degree_v, surf.num_ctrlpts_v)
condition = np.allclose(vvec, surf.knot_vector_v)
assert condition
def test_knot_vector_u(surf):
uvec = knots.generate_uniform(surf.degree_u, surf.num_ctrlpts_u)
condition = np.allclose(uvec, surf.knot_vector_u)
assert condition
def test_generate2():
degree = 3
num_ctrlpts = 4
expected = np.array([0, 0, 0, 0, 1, 1, 1, 1])
generated = knots.generate_uniform(degree, num_ctrlpts)
condition = np.allclose(generated, expected)
assert condition
def test_generate3():
degree = 2
num_ctrlpts = 6
expected = np.array([0, 0, 0, 0.25, 0.5, 0.75, 1, 1, 1])
generated = knots.generate_uniform(degree, num_ctrlpts)
condition = np.allclose(generated, expected)
assert condition
def test_surf_knot_vector_guard_v():
with pytest.raises(Exception):
x = np.arange(0.0, 5.0)
y = np.arange(0.0, 5.0)
ys, xs = np.meshgrid(x, y)
ctrlpt_array = np.column_stack((xs.flatten(), ys.flatten(), np.zeros(len(xs.flatten()))))
surf = spline.Surface()
surf.degree_u = 2
surf.degree_v = 2
num_ctrlpts = 5
knot_vec = knots.generate_uniform(surf.degree_v, num_ctrlpts)
surf.knot_vector_v = knot_vec
