Hi Jelle, You're right, it's a pythonOCC issue. I noticed it a couple of weeks ago. Here is the problem: the occ.GeomLProp_SurfaceTool().Bounds method takes 4 Standard_Real passed by reference. This means under C++ you do:
Standard_Real a, b, c, d; GeomLProp_SurfaceTool.Bounds(hsrf,a,b,c,d); and you can access the new values of a, b, c, d. In Python, it's impossible (no pointers in Python)! For instance, if you have: a = b = c = d = 0.0 occ.GeomLProp_SurfaceTool.Bounds(hsrf,a,b,c,d) then a still equals 0.0, and so b, c and d. So the Python wrapper needs to transform this function so that is returns 4 Standard_Real. The good solution would be (under Python): a, b, c, d = occ.GeomLProp_SurfaceTool.Bounds(hsrf) SWIG can handle function transformation in a very simple way, but I did not have time to do that for the moment. I know a few other methods are affected by this issue (for example the BndLib.GetBoudingBox or something like that (not sure about the function name)). Thanks for the feedback, Thomas > -----Message d'origine----- > De : [EMAIL PROTECTED] [mailto:minerva-pythonocc- > [EMAIL PROTECTED] De la part de Jelle Feringa > Envoyé : vendredi 28 novembre 2008 14:18 > À : minerva-pythonocc@gna.org > Objet : [Minerva-pythonocc] Standard_Real error, when sending floats > > > Hi, > > I'm working on a curvature issue, and am having problems sending floats. > I think this might be an issue API wide, so perhaps its important. > > .Bounds expects 4 Standard_Real's, neither of the two methods below > work. > Any ideas how I can fix this? > > Much appreciated, > > -jelle > > a,b,c,d = [.1]*4 > occ.GeomLProp_SurfaceTool().Bounds(h_srf, 0., 0. ,0. ,0. ) > occ.GeomLProp_SurfaceTool().Bounds(h_srf, a,b,c,d) > > > occ.GeomLProp_SurfaceTool().Bounds(h_srf, a,b,c,d) > Traceback (most recent call last): > File "<console>", line 1, in ? > File "C:\Python24\Lib\site-packages\OCC.py", line 192525, in Bounds > return _OCC.GeomLProp_SurfaceTool_Bounds(*args) > TypeError: in method 'GeomLProp_SurfaceTool_Bounds', argument 3 of > type 'Standard_Real &' > > > _______________________________________________ > Minerva-pythonocc mailing list > Minerva-pythonocc@gna.org > https://mail.gna.org/listinfo/minerva-pythonocc _______________________________________________ Minerva-pythonocc mailing list Minerva-pythonocc@gna.org https://mail.gna.org/listinfo/minerva-pythonocc
