def make_ruled_surface(self, curve2, vmin, vmax):
curve = self
curve2 = SvNurbsCurve.to_nurbs(curve2)
if curve2 is None:
raise UnsupportedCurveTypeException("second curve is not NURBS")
curve, curve2 = unify_curves_degree([curve, curve2])
if curve.get_degree() != curve2.get_degree():
raise UnsupportedCurveTypeException(
f"curves have different degrees: {curve.get_degree()} != {curve2.get_degree()}"
)
#print(f"kv1: {curve.get_knotvector().shape}, kv2: {curve2.get_knotvector().shape}")
kv1, kv2 = curve.get_knotvector(), curve2.get_knotvector()
if kv1.shape != kv2.shape or (kv1 != kv2).any():
curve, curve2 = unify_two_curves(curve, curve2)
#raise UnsupportedCurveTypeException("curves have different knot vectors")
my_control_points = curve.get_control_points()
other_control_points = curve2.get_control_points()
if len(my_control_points) != len(other_control_points):
raise UnsupportedCurveTypeException(
"curves have different number of control points")
if vmin != 0:
my_control_points = (
1 - vmin) * my_control_points + vmin * other_control_points
if vmax != 0:
other_control_points = (
1 - vmax) * my_control_points + vmax * other_control_points
control_points = np.stack((my_control_points, other_control_points))
control_points = np.transpose(control_points, axes=(1, 0, 2))
weights = np.stack((curve.get_weights(), curve2.get_weights())).T
knotvector_v = sv_knotvector.generate(1, 2, clamped=True)
surface = SvNurbsMaths.build_surface(
self.get_nurbs_implementation(),
degree_u=curve.get_degree(),
degree_v=1,
knotvector_u=curve.get_knotvector(),
knotvector_v=knotvector_v,
control_points=control_points,
weights=weights)
return surface
def lerp_to(self, curve2, coefficient):
curve1 = self
curve2 = SvNurbsCurve.to_nurbs(curve2)
if curve2 is None:
raise UnsupportedCurveTypeException("second curve is not NURBS")
curve1, curve2 = unify_curves_degree([curve1, curve2])
curve1, curve2 = unify_two_curves(curve1, curve2)
#c1cp = curve1.get_homogenous_control_points()
#c2cp = curve2.get_homogenous_control_points()
c1cp = curve1.get_control_points()
c2cp = curve2.get_control_points()
ws1 = curve1.get_weights()
ws2 = curve2.get_weights()
points = c1cp * (1 - coefficient) + coefficient * c2cp
weights = ws1 * (1 - coefficient) + coefficient * ws2
return SvNurbsCurve.build(curve1.get_nurbs_implementation(),
curve1.get_degree(), curve1.get_knotvector(),
points, weights)