[vtkusers] How to crop a 3D model?

[David Doria]

On Tue, Apr 17, 2012 at 5:14 PM, Wenlong <scc.wwl at gmail.com> wrote:

> Dear all,
>
> I am trying to crop my 3D face model. For example, I have a 3D face model
> with 7710 points. But I don't need them all, I only need 5090 of them. So,
> how can I crop the oringinal 3D face model and get a smaller one?
>
> Many thanks in advance for your kindly help.
>
> Best wishes
> Wenlong
>

It sounds like you want to either *decimate* a mesh:
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Meshes/Decimation
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Meshes/QuadricDecimation
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Meshes/QuadricClustering

or *downsample* a point cloud:
http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/DownsamplePointCloud

David
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