[Paraview] pythonnurbs inside ProgrammableFilter

[Oliver Borm]

Do you mean the source code of pythonnurbs or my test code? Pythonnurbs itself is a python binding of the NURBS++ library using SWIG. This is the whole python code I'm using inside the ProgrammableFilter:

from pythonnurbs import NurbsCurve, NurbsPoint

curve=NurbsCurve.NurbsCurved()
curve.makeCircle(NurbsPoint.Point3Dd(0.0,0.0,0.0), 100.0)
u = 0.5
print curve.pointAt(u).getx(), curve.pointAt(u).gety(), curve.pointAt(u).getz()



Berk Geveci schrieb:
> I am guessing somehow the arguments passed to makeCircle are getting
> clobbered. Can you post you Python code?
>
> -berk
>
> On Fri, Jan 8, 2010 at 4:12 AM, Oliver Borm <oli.borm at web.de> wrote:
>   
>> Hello,
>>
>> I am using pythonnurbs from http://pypi.python.org/pypi/PythonNURBS in
>> conjunction with the python bindings from vtk. As a standalone script it
>> works perfectly, but if I want to use it inside paraview with the
>> ProgrammableFilter it just works once a time. After that some errors
>> occur. Here is a simple python test code:
>>
>> from pythonnurbs import NurbsCurve, NurbsPoint
>> curve=NurbsCurve.NurbsCurved()
>> curve.makeCircle(NurbsPoint.Point3Dd(0.0,0.0,0.0), 100.0)
>> u = 0.5
>> print curve.pointAt(u).getx(), curve.pointAt(u).gety(),
>> curve.pointAt(u).getz()
>>
>> The following output is printed:
>>
>> -100.0 0.0 0.0
>>
>>
>> If one changes for example:
>> u = 0.25
>>
>> and want to re-execute the ProgrammableFilter again, the following error
>> occured
>>
>> Traceback (most recent call last):
>>
>> File "<string>", line 23, in <module>
>>
>> File "<string>", line 5, in RequestData
>>
>> File "/usr/lib64/python2.6/site-packages/pythonnurbs/NurbsCurve.py",
>> line 277, in makeCircle
>>
>> def makeCircle(*args): return _NurbsCurve.NurbsCurved_makeCircle(*args)
>>
>> NotImplementedError: Wrong number of arguments for overloaded function
>> 'NurbsCurved_makeCircle'.
>>
>> Possible C/C++ prototypes are:
>>
>> makeCircle(PLib::NurbsCurve< double,3 > *,PLib::Point_nD< double,3 >
>> const &,PLib::Point_nD< double,3 > const &,PLib::Point_nD< double,3 >
>> const &,double,double,double)
>>
>> makeCircle(PLib::NurbsCurve< double,3 > *,PLib::Point_nD< double,3 >
>> const &,double,double,double)
>>
>> makeCircle(PLib::NurbsCurve< double,3 > *,PLib::Point_nD< double,3 >
>> const &,double)
>>
>>
>> while running the same code a second time in a normal python shell, the
>> output looks like the following:
>> 0.0 100.0 0.0
>>
>> One has to restart paraview and the python code in the
>> ProgrammableFilter works as expected (once a time). The error message is
>> not very helpful, as it says that this method is not implemented in the
>> way I'm using it. But that is not correct. Does anybody has an idea
>> what's the real problem? At first one could expect the problem is in
>> pythonnurbs (maybe it is, but not in the way the error message says),
>> but as the code works once a time, why does it not works twice?
>>
>> Best regards,
>> Oliver Borm
>>
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