[GRASS-dev] vtkGRASSBridge update

Benjamin Ducke benjamin.ducke at oxfordarch.co.uk
Sat Sep 26 12:17:07 EDT 2009

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...


> Markus
> _______________________________________________
> grass-dev mailing list
> grass-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-dev

Benjamin Ducke
Senior Applications Support and Development Officer

Oxford Archaeological Unit Limited
Janus House
Osney Mead
Oxford, U.K.

Tel: +44 (0)1865 263 800 (switchboard)
Tel: +44 (0)1865 980 758 (direct)
Fax :+44 (0)1865 793 496
benjamin.ducke at oxfordarch.co.uk

Files attached to this email may be in ISO 26300 format (OASIS Open Document Format). If you have difficulty opening them, please visit http://iso26300.info for more information.

More information about the grass-dev mailing list