FreeCAD Macro to convert a wire into a piecevise Bezier curve
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import FreeCAD | |
def segments2points(segments,degree): | |
pts=segments[0].getPoles()[0:1] | |
for seg in segments: | |
if seg.Degree < degree: | |
seg.Increase(degree) | |
pts.extend(seg.getPoles()[1:]) | |
return pts | |
def partwire2draftbezcurve(wire,degree=3,label=None): | |
points=[wire.Vertexes[0].Point] | |
for edge in wire.Edges: | |
curve=edge.Curve | |
if not isinstance(curve,Part.BezierCurve) or curve.Degree>degree: | |
print 'approimate' | |
if not isinstance(curve,Part.BSplineCurve): | |
curve=curve.toBSpline() | |
if curve.Degree<degree: | |
curve.increaseDegree(degree) | |
if curve.Degree==degree: | |
seglst = curve.toBezier() | |
else: | |
seglst = curve.approximateBSpline(0.05,20, 3,'C0').toBezier() | |
points.extend(segments2points( seglst,degree)[1:]) | |
else: | |
print 'isbezier',curve.Degree | |
if curve.Degree<degree: | |
curve.Increase(degree) | |
if curve.Degree==degree: | |
points.extend(curve.getPoles()[1:]) | |
else: | |
raise ValueError | |
if (len(points) > 3) and (points[0]==points[-1]): | |
points.pop() | |
closed=True | |
else: | |
closed=False | |
import Draft | |
do=Draft.makeBezCurve(points,closed=closed,support=None,Degree=degree) | |
if label: | |
do.Label='Bez%s'%label | |
if __name__ == '__main__': | |
import FreeCADGui | |
for obj in FreeCADGui.Selection.getSelection(): | |
wires = obj.Shape.Wires if obj.Shape.ShapeType != 'Edge' else [PartEdge(obj.Shape)] | |
for wire in wires: | |
partwire2draftbezcurve(wire,label=obj.Label) |
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