[Paraview] pythonnurbs inside ProgrammableFilter

[Berk Geveci]

What happens if you put all of these in a function and call that
function twice? That's what the GUI does.

-berk

On Fri, Jan 8, 2010 at 11:34 AM, Oliver Borm <oli.borm at web.de> wrote:
> It just works:
>
> ~ $ pvpython
> Python 2.6.4 (r264:75706, Dec  8 2009, 20:49:52)
> [GCC 4.3.4] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> from pythonnurbs import NurbsPoint
>>>> point = NurbsPoint.Point3Dd(100.0,0.0,0.0)
>>>> print point.getx()
> 100.0
>>>> point = NurbsPoint.Point3Dd(0.0,0.0,0.0)
>>>> print point.getx()
> 0.0
>>>> print(point)
> <pythonnurbs.NurbsPoint.Point3Dd; proxy of <Swig Object of type
> 'PlPoint3Dd *' at 0xd8c910> >
>>>> point.setx(25.0)
>>>> print point.getx()
> 25.0
>>>>
>
>
> Berk Geveci schrieb:
>> 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
>>>>>>>
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>