Re: Constructing pfASD
Dominic Acocella (acocella++at++cae.ca)
Fri, 27 Mar 1998 12:29:46 -0500
>
> >I would like to construct LODs from a high resolution set of triangles
> >where certain features, e.g. outlines of areas like lakes, glaciers, etc.
> >should change at a slower rate across several LODs than the number of
> >triangles inside these areas.
>
> >Are there well-known algorithms solving this problem as well?
>
> No. :-( Constructing an ASD "bottom-up" (starting from the most detailed
> and working backwards) is a particularly thorny problem, one I was never
> able to crack adequately. This is because of the requirements of how an
> each LOD in an ASD must be connected to each other. It is much simpler
> to start with a coarse tesselation and subdivide it according to those
> rules
> than to start with a fine tesselation and merge those into coarser samples.
You should look at the siggraph 97 conference proceedings. I seem to
remember some papers on simplifying triangle strips while maintaining
the topology.
Dominic.
acocella++at++cae.ca
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on Mon Aug 10 1998 - 17:57:06 PDT