def set_uniform(self, control_points: Sequence['Vertex'],
degree: int = 3) -> None:
""" B-spline with uniform knot vector, does NOT start and end at your
first and last control points.
"""
self.dxf.flags = 0
self.dxf.degree = degree
self.control_points = control_points
self.knots = uniform_knot_vector(len(control_points), degree + 1)
def set_closed(self, control_points: Sequence["Vertex"], degree=3) -> None:
"""
Closed B-spline with uniform knot vector, start and end at your first control point.
"""
self.dxf.flags = self.PERIODIC | self.CLOSED
self.dxf.degree = degree
self.control_points = control_points # type: ignore
self.control_points.extend(control_points[:degree])
# AutoDesk Developer Docs:
# If the spline is periodic, the length of knot vector will be greater
# than length of the control array by 1, but this does not work with
# BricsCAD.
self.knots = uniform_knot_vector(len(self.control_points), degree + 1)
def test_auditing_weight_count(self, auditor, spline, degree):
order = degree + 1
spline.dxf.degree = degree
count = required_control_points(order)
add_n_control_points(spline, count)
spline.knots = uniform_knot_vector(count, order)
spline.weights = range(count - 1)
spline.audit(auditor)
assert len(auditor.fixes) == 1
assert auditor.fixes[0].code == AuditError.INVALID_SPLINE_WEIGHT_COUNT
# Test if invalid spline will be destroyed:
auditor.empty_trashcan()
assert spline.is_alive is False