[Paraview] pythonnurbs inside ProgrammableFilter

[Berk Geveci]

What happens if you run this in pvpython?

On Fri, Jan 8, 2010 at 10:52 AM, Oliver Borm <oli.borm at web.de> wrote:
> Ok, here the test code:
>
> from pythonnurbs import NurbsPoint
>
> point = NurbsPoint.Point3Dd(100.0,0.0,0.0)
>
> print(point)
>
> print point.getx()
>
>
> first time output:
>
> <pythonnurbs.NurbsPoint.Point3Dd; proxy of <Swig Object of type
> 'PlPoint3Dd *' at 0x2d37710> >
>
> 100.0
>
>
> second time output:
>
> <pythonnurbs.NurbsPoint.Point3Dd; proxy of <Swig Object of type
> 'PlPoint3Dd *' at 0x2d37710> >
>
>
> 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/NurbsPoint.py",
> line 104, in getx
>
> def getx(*args): return _NurbsPoint.Point3Dd_getx(*args)
>
> TypeError: in method 'Point3Dd_getx', argument 1 of type
> 'PLib::Point_nD< double,3 > *'
>
>
> Well if I do not access the point object, then it seems that all went
> fine. But if I want to get any data from the point object, then I get
> the error.
>
> Berk Geveci schrieb:
>> Sorry, I assumed that you had more than those few lines. OK, this is
>> very weird. Can you simply print what
>> NurbsPoint.Point3Dd(0.0,0.0,0.0)
>> returns the first time and the second time?
>>
>>
>> On Fri, Jan 8, 2010 at 9:49 AM, Oliver Borm <oli.borm at web.de> wrote:
>>
>>> 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
>>>>>
>>>>> _______________________________________________
>>>>> Powered by www.kitware.com
>>>>>
>>>>> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>>>>>
>>>>> Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView
>>>>>
>>>>> Follow this link to subscribe/unsubscribe:
>>>>> http://www.paraview.org/mailman/listinfo/paraview
>>>>>
>>>>>
>>>>>
>