Re: [gts-general] Newbie questions - how do I ...

[Frederic B. <fr...@wa...>]

From: "Stephane Popinet" <s.p...@ni...>

> > I think I figured out how to do this.
> >
> > 1. create a delaunay triangulation,
> > 2. add all DEM points into it,
> > 3. for each polygon, 
> >   3a. extude it and create a strip,
> >   3b. create a surface intersection between the delaunay and the 
> >       strip (Q: Do the strip have to be closed, with a triangulated
> >       top and bottom ? )
> >   3c. for each face in the surface inside the strip, assign the 
> >       associated material value,
> >   3d. merge the two surfaces
> > 4. create a surface for every material type and stripify it.
> >
> > Does it look sensible ?
> > I just have to learn how to attach user data to a face. Is there a
> > code example somewhere ?
> 
> Your approach looks allright. The strip do not need triangulated top
> and bottom but needs properly oriented (and high enough) side walls.

What is a properly oriented side wall ?

Are gts_edge_new( gts_edge_class(), v1, v2 ) and 
  gts_edge_new( gts_edge_class(), v2, v1 ) the same edge ?

Thanks,

-Fred