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<p>Gawain, <br>
if you just want straight offset as per your plane example vtkTransform could do it. <br>
But if the original surface was a hemisphere do you expect a larger hemisphere at a constant distance - 'like' vtkImplicitModeller? If so I think the latter is as good as it gets, but it will offset from both sides of the surface. Maybe there is a way with normals: generate normals for the offset surface, then remove all cells facing 'backwards' ? (dot product)? But for complex surfaces this could make holes in the 'front' surface too?<br>
<br>
regards, Dave<br>
<br>
gawain_dev@sina.com<tt> wrote on 24/04/2009 15:30:37:<br>
<br>
> Hi all,<br>
> <br>
> Is there any easy way to offset an isosurface using vtk?<br>
> <br>
> I tried vtkImplicitModeller+vtkContourFilter, but it isn't what <br>
> I want. I need the result surface be a one-side offset surface <br>
> without thickness. For example, another plane should be obtained <br>
> after a plane is offset, while vtkImplicitModeller+vtkContourFilter <br>
> gives a box containing the original plane.<br>
> <br>
> Thanks,<br>
> <br>
> Gawain_______________________________________________<br>
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