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import dxf splines as Draft BezCurve if applicable

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fixes 1743
This commit is contained in:
Sebastian Hoogen 2015-01-20 17:59:04 +01:00
parent 17a85e4352
commit c05f7762f8
1 changed files with 25 additions and 5 deletions
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30
src/Mod/Draft/importDXF.py
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@ -621,7 +621,7 @@ as there is currently no Draft premitive to handle splines the result is a
non-parametric curve"""
flags = rawValue(spline,70)
closed = (flags & 1) != 0
periodic = (flags & 2) != 0
periodic = (flags & 2) != 0 and False # workaround
rational = (flags & 4) != 0
planar = (flags & 8) != 0
linear = (flags & 16) != 0
@ -694,11 +694,31 @@ non-parametric curve"""
previousknot = knotvalue
knotvector.append(knotvalue)
multvector.append(mult)
# check if the multiplicities are valid
innermults = multvector[:] if periodic else multvector[1:-1]
if any(m>degree for m in innermults):
#raise ValueError('Invalid multiplicities')
#warn('polygon fallback on %s' %spline)
return drawSplineIterpolation(controlpoints,closed=closed,\
if any(m>degree for m in innermults): #invalid
if all(m == degree+1 for m in multvector):
if not forceShape and weights is None:
points=controlpoints[:]
del points[degree+1::degree+1]
return Draft.makeBezCurve(points,Degree=degree)
else:
poles=controlpoints[:]
edges=[]
while len(poles) >= degree+1:
#bezier segments
bzseg=Part.BezierCurve()
bzseg.increase(degree)
bzseg.setPoles(poles[0:degree+1])
poles=poles[degree+1:]
if weights is not None:
bzseg.setWeights(weights[0:degree+1])
weights=weights[degree+1:]
edges.append(bzseg.toShape())
return Part.Wire(edges)
else:
warn('polygon fallback on %s' %spline)
return drawSplineIterpolation(controlpoints,closed=closed,\
forceShape=forceShape,alwaysDiscretize=True)
try:
bspline=Part.BSplineCurve()