[GRASS-dev] vtkGRASSBridge update

[Benjamin Ducke]

Great stuff indeed, Soeren!

> 
> Curiosity: how much faster is this compared to v.delaunay or likewise?

To me, it's not so much the speed that matters but functionality.
VTK's 2D Delaunay has a very useful "alpha" threshold setting to constrain
the triangle (by maximum triangle size). 
In addition, it's capable of fitting a plane of reference through the data 
points and does not assume that they lie perfectly in the X-Y plane. 
This gives much better results for point clouds that describe e.g. micro relief 
on a slope.

You can try this already, even without the VTK bridge: just export some
3D points to VTK, load into ParaView (3.6) and choose Delaunay 2D from
the "Filter" menu.

Now, if only we had a simple way of getting VTK data back into GRASS...

Ben


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-- 
Benjamin Ducke
Senior Applications Support and Development Officer

Oxford Archaeological Unit Limited
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benjamin.ducke at oxfordarch.co.uk




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