def test_nurbs_init_with_knots_raises(nurbs_3d):
with pytest.raises(RuntimeError):
an.NurbsCurveGeometry3D(
degree=4,
knots=np.empty(5),
poles=np.empty((5, 3)),
)
def nurbs_3d():
geometry = an.NurbsCurveGeometry3D(
degree=4,
nb_poles=8,
is_rational=True,
)
geometry.knots = [
0, 0, 0, 0, 32.9731425998736, 65.9462851997473, 98.9194277996209,
131.892570399495, 131.892570399495, 131.892570399495, 131.892570399495
]
geometry.poles = [
[0, -25, -5],
[-15, -15, 0],
[5, -5, -3],
[15, -15, 3],
[25, 0, 6],
[15, 15, 6],
[-5, -5, -3],
[-25, 15, 4],
]
geometry.weights = [1, 3, 1, 2.5, 1, 0.5, 1, 2]
return geometry
def test_bspline_3d():
curve_geometry = an.NurbsCurveGeometry3D(
degree=4,
nb_poles=8,
is_rational=False,
)
curve_geometry.knots = [0, 0, 0, 0, 32.9731425998736, 65.9462851997473, 98.9194277996209, 131.892570399495, 131.892570399495, 131.892570399495, 131.892570399495]
curve_geometry.poles = [
[ 0, -25, - 5],
[-15, -15, 0],
[ 5, - 5, - 3],
[ 15, -15, 3],
[ 25, 0, 6],
[ 15, 15, 6],
[- 5, - 5, - 3],
[-25, 15, 4],
]
model = an.Model()
curve_geometry_ptr = model.add(curve_geometry)
curve = an.Curve3D(curve_geometry_ptr, curve_geometry.domain)
# point_at
assert_array_almost_equal(
curve.point_at(t=65.9462851997),
[18.8888888889, -6.1111111111, 4.1666666667],
)
def test_nurbs_by_lists():
an.NurbsCurveGeometry3D(
degree=4,
knots=[
0, 0, 0, 0, 32.9731425998736, 65.9462851997473, 98.9194277996209,
131.892570399495, 131.892570399495, 131.892570399495,
131.892570399495
],
poles=[[0, -25, -5], [-15, -15, 0], [5, -5, -3], [15, -15, 3],
[25, 0, 6], [15, 15, 6], [-5, -5, -3], [-25, 15, 4]],
weights=[1, 3, 1, 2.5, 1, 0.5, 1, 2],
)
def curve():
curve_geometry = an.NurbsCurveGeometry3D(degree=4, nb_poles=8)
curve_geometry.knots = [3, 3, 3, 3, 6.5, 10, 13.5, 17, 17, 17, 17]
curve_geometry.poles = [
[ 0, -25, - 5],
[-15, -15, 0],
[ 5, - 5, - 3],
[ 15, -15, 3],
[ 25, 0, 6],
[ 15, 15, 6],
[- 5, - 5, - 3],
[-25, 15, 4],
]
return curve_geometry
def empty_bspline():
return an.NurbsCurveGeometry3D(
degree=2,
nb_poles=4,
is_rational=False,
)