[GRASS5] TINs as 3D vectors

Pieter Bos pbos at itc.nl
Thu Apr 14 06:16:18 EDT 2005

There is no possibility of creating 3D-vectors from v.delaunay directly.
We are currently implementing a system for vague regions in GRASS that
uses triangulations with 3D vectors, and have linked Triangle to GRASS.
Triangle is a much faster and memory efficient delaunay triangulation
with support for constraints. See
http://www-2.cs.cmu.edu/~quake/triangle.html for more information.

As soon as everything is done we'll release a few useful GRASS modules,
including this better Delaunay triangulation and the 2D alpha-shape
algorithm, and perhaps some 2D visualization of TINs which might be
useful as a general module with some slight modifications. If you need
it now I can send you the module.


Pieter Bos

-----Original Message-----
From: grass5-admin at grass.itc.it [mailto:grass5-admin at grass.itc.it] On
Behalf Of Jachym Cepicky
Sent: Wednesday, April 13, 2005 2:10 PM
To: GRASS Developers list
Subject: [GRASS5] TINs as 3D vectors

is there any possibilty, how to create 3D-vector of TIN (triangulated
irregular network) of the output from v.delauny? I have 3D points and
v.delauny makes only 2D-polygons from it.. 

I wrote some script which solves this, but before I post it, I would
like to know, that I did not something useless.

Thank you a lot

Jachym Cepicky
e-mail: jachym.cepicky at centrum.cz
URL: http://les-ejk.cz
GPG: http://www.fle.czu.cz/~jachym/gnupg_public_key/

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