Surface from Points: best approach?

[Audrius Stundzia]

Hi Tim,

Thanks for you advice. Much appreciated.
A surface popped out of the end of the imaging
pipeline (using default parameter settings).

Btw, Is there a reason to pick vtkSurfaceReconstructionFilter over
vtkDelauny3D?

Best regards,

Audrius


>From: Tim Hutton <T.Hutton at eastman.ucl.ac.uk>
>To: audrius at adv-biologic.com
>Subject: Re: Surface from Points: best approach?
>Date: Thu, 02 Mar 2000 11:39:08 +0000
>
>You'll be wanting vtkSurfaceReconstructionFilter I should think.
>
>Pass it the points, pass the output through vtkMarchingCubes:
>
>vtkPoints->vtkSurfaceReconstructionFilter->vtkMarchingCubes->vtkPolyDataMapper
>
>Default parameters should work for each, please do tell me how you get on.
>Specifically, if you have any problems with the class, I can help.
>
>Cheers,
>
>Tim.
>
>At 20:34 01/03/00 PST, you wrote:
> >Dear vtker's
> >
> >I'd appreaciate some advice on the best approach to construct
> >a surface from a collection of points. These points lie on gridlines
> >on the surface (imagine the surface gridline created by two sets of 
>mutually
> >orthogonal planes cutting a egg). I have about 12,000 points
> >on 80 gridlines.
> >
> >Presumably I would like the surface to be reconstructed of type 
>vtkPolyData,
> >specifically triangle (strips). The question is how
> >best to get there?
> >
> >How about the following
> >
> >vtkPoints                ->
> >vtkCellArray (vtkVertex) ->
> >vtkCellArray (vtkLine)   ->
> >
> >All go into
> >
> >vtkPolyData ->
> >
> >A concrete subclass of vtkPointSet, so I can pass it into
> >
> >vtkVoxelModeller ->
> >
> >giving structured points with occupancy recorded, from which
> >I can extract an isosurface using
> >
> >vtkMarchingCubes ->
> >
> >and create triangle strips using
> >
> >vtkStripper ->
> >
> >and finally display it.
> >
> >If I instantiate vtkPolyData with vertices and lines, but not
> >polys, etc. can I generate triangles by passing the object into
> >vtkTriangle filter with the vertex and line passes turned on?
> >
> >Any help / insight would be appreciated. Thanks.
> >
> >Regards,
> >
> >Audrius
> >
> >
> >
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>---------------------------------------------------------------------------
>Tim Hutton, Research Assistant            Email: T.Hutton at eastman.ucl.ac.uk
>MINORI Project                          Eternal: T.Hutton at excite.co.uk
>Dental and Medical Informatics     http://www.eastman.ucl.ac.uk/~dmi/MINORI
>
>Eastman Dental Institute, UCL                    Tel: [+44] (0207) 915 2344
>256 Gray's Inn Road, London WC1X 8LD, UK         Fax: [+44] (0207) 915 2303
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