RE: [Algorithms] Heightfield to NURBS conversion

[Martin F. <mf...@ac...>]

Sorry accidentally sent that prematurely. (Damm short cut keys)


-----Original Message-----
From: Martin Fuller [mailto:mf...@ac...]
Sent: 06 September 2000 03:05
To: 'gda...@li...'
Subject: RE: [Algorithms] Heightfield to NURBS conversion


What you're asking for is a easy solution to what is a very very complex
problem.
I would suggest instead of using NURBS looking at a curve equation that
actually 
interpolates the control points. (but break the convex hull) Catmull Rom
splines 
immediatly spring to mind.


-----Original Message-----
From: Christian R. M. Koerber
[mailto:chr...@pu...]
Sent: 06 September 2000 02:05
To: gda...@li...
Subject: Re: [Algorithms] Heightfield to NURBS conversion


"Christian R. M. Koerber" wrote:

> 
> I have a question too:
> 
> Could anyone of you point me to an algorithm on heightfield

actually I meant 'easy, ready to use algorithm'


> to NURBS conversion i.e an algorithm which takes as input
> an heightfield and returns the control points of the NURBS-
> surface which APPROXIMATES the heightfield to a user given
> error?
> I'd really like to avoid meddling with the later chapters
> of Piegl & Tillers NURBS book! Maybe you even know a pro-
> gram?
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