[GRASS-dev] 2D to 3D points

[Dylan Beaudette]

On Sunday 02 March 2008, Hamish wrote:
> Benjamin wrote:
> > > As far as I am aware, the term "extrusion" is pretty well defined
> > > as the operation of extending an object in 3D space by "pulling
> > > it out" with a predefined bearing and length. This would convert a
> > > point to a line, a line to a plane and a polygon to, well, a
> > > polygon with a volume, I guess.
> > >
> > > Personally, I'd be more in favour of wrapping a little script
> > > "v.points.to.3d" around v.transform. For the beginners' sake.
>
> Dylan:
> > Well from that 'angle' I think that it makes sense not to use
> > v.extrude.
> > v.points.to.3d seems like a fine choice.
>
> 'til now we have manged to keep the "."s in official modules to a max
> of two.
>
> see previous discussion:
>  http://article.gmane.org/gmane.comp.gis.grass.devel/13714
>  http://article.gmane.org/gmane.comp.gis.grass.devel/13739
>
>
> v.to.3dpoints or v.points.3d?

Right-- better to stick to established conventions. Any name is ok with me. 
v.points.3d sounds good.

> It doesn't match v.to.rast,v.to.rast3 naming, but I think v.to.points3
> would make it too close to v.to.points which is another task
> completely.
> But it is not so far from what v.to.rast3 does, so maybe not so bad.
> (shrug)
>
> to get a nifty instant prefab wrapper script do:
>   v.transform --script
>
>
> Changing topic slightly, how about adding a -z flag to v.to.points for
> 3D lines? (no DB column involved)
>

sounds like a useful option.

cheers,

Dylan

> Hamish
>
>
>
>      
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-- 
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341