[GRASS-user] <v.triangle> -- module to produce TIN with "breaklines" using <Triangle> utility

[Sylvain Maillard]

Hi,

I'm not sure to understand the difference between your v.triangle and the
v.delaunay (
http://grass.osgeo.org/grass64/manuals/html64_user/v.delaunay.html) already
in grass core ... for what I see in your pdf exemple, it seems that your
new module is giving almost the same result as v.delaunay would do ...

can you explain the differences ? I like to learn new things in grass ;)


cheers,
Sylvain


2012/4/20 Alexander Muriy <amuriy at gmail.com>

> Hi all.
>
> I wrote a shell-script module <v.triangle> that is "front-end" for the
> famous <Triangle> utility (http://www.cs.cmu.edu/~quake/triangle.html) of
> J.R. Shewchuk. I'm planning to add it to GRASS-Addons wiki page :)
>
> <Triangle> makes exact Delaunay triangulations, constrained Delaunay
> triangulations, conforming Delaunay triangulations and high-quality
> triangular meshes. On GIS terminology, it produces 2D TIN, optionally with
> "breaklines".
>
> Link:  https://raw.github.com/amuriy/GRASS-scripts/master/v.triangle
>
>
> P.S. It generally works but centroids in final TIN have "0" heights. Now I
> think about some hack to make the right centroids in all areas of TIN.
>
> -----------------------------------------------------------------
> Comparison of the one resulting TIN with the TIN produced in ArcView 3D
> Analyst see in linked PDF (
> http://dl.dropbox.com/u/42016908/ArcView_GRASS_TIN_breaklines.pdf)
> -----------------------------------------------------------------
>
>
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