def test_from_nurbs_python_curve_to_ezdxf_bspline():
from geomdl.fitting import interpolate_curve
curve = interpolate_curve([(0, 0), (0, 10), (10, 10), (10, 0)], degree=3)
bspline = BSpline.from_nurbs_python_curve(curve)
assert bspline.degree == 3
assert len(bspline.control_points) == 4
assert len(bspline.knots()) == 8 # count + order
def test_from_ezdxf_bspline_to_nurbs_python_curve_non_rational():
bspline = global_bspline_interpolation([(0, 0), (0, 10), (10, 10), (10, 0)], degree=3)
# to NURBS-Python
curve = bspline.to_nurbs_python_curve()
assert curve.degree == 3
assert len(curve.ctrlpts) == 4
assert len(curve.knotvector) == 8 # count + order
assert curve.rational is False
# and back to ezdxf
spline = BSpline.from_nurbs_python_curve(curve)
assert spline.degree == 3
assert len(spline.control_points) == 4
assert len(spline.knots()) == 8 # count + order
def apply_construction_tool(self, s) -> "Spline":
"""Apply SPLINE data from a :class:`~ezdxf.math.BSpline` construction
tool or from a :class:`geomdl.BSpline.Curve` object.
"""
try:
self.control_points = s.control_points
except AttributeError: # maybe a geomdl.BSpline.Curve class
s = BSpline.from_nurbs_python_curve(s)
self.control_points = s.control_points
self.dxf.degree = s.degree
self.fit_points = [] # remove fit points
self.knots = s.knots()
self.weights = s.weights()
self.set_flag_state(Spline.RATIONAL, state=bool(len(self.weights)))
return self # floating interface
def test_from_ezdxf_bspline_to_nurbs_python_curve_rational():
bspline = rational_spline_from_arc(center=Vector(0, 0), radius=2, start_angle=0, end_angle=90)
# to NURBS-Python
curve = bspline.to_nurbs_python_curve()
assert curve.degree == 2
assert len(curve.ctrlpts) == 3
assert len(curve.knotvector) == 6 # count + order
assert curve.rational is True
assert curve.weights == [1.0, 0.7071067811865476, 1.0]
# and back to ezdxf
spline = BSpline.from_nurbs_python_curve(curve)
assert spline.degree == 2
assert len(spline.control_points) == 3
assert len(spline.knots()) == 6 # count + order
assert spline.weights() == [1.0, 0.7071067811865476, 1.0]