[vtkusers] Cutting a hole in polydata

[Ricardo Seco VTK]

Could you send the code to see it throught?

Ricardo Seco

Hakim Boukellif escreveu:
> Hello,
>
> My apologies if this has been asked before (I've searched through the 
> mailing list archives and documentation, but without much success - 
> perhaps I've used the wrong keywords), but I've been trying to cut a 
> hole in polydata by drawing a shape using the mouse. I'm kind of new 
> to VTK, so please excuse any naivety in my methods.
> Basically, what I'm currently doing is, when I move the mouse while 
> the right mouse button is pressed, a vtkPointPicker tries to pick the 
> point on the polygonal object from my current mouse position. When it 
> does, it adds this point to a vtkPoints object and once I release the 
> right mouse button, it sets this object as the loop of a 
> vtkImplicitSelectionLoop, which is also the clip function of 
> vtkClipPolyData filter attached to the dataset containing the polydata.
> The resulting hole, however, is rather strange. It tends be something 
> like a big crescent shape chopped out of the 3D model or a whole bunch 
> of tiny, irregularly  shaped holes. At any rate, nothing like the 
> shape I've drawn.
> The pointpicker appears to be working just fine and I've tried messing 
> with the normals of the implicit selectionloop, but to no avail. I'm 
> not quite sure where the problem is, so I'd very grateful if someone 
> could help me with this problem.
>
> Hakim Boukellif
> _______________________________________________
> This is the private VTK discussion list. Please keep messages 
> on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>