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Re: Real time subdivision

Posted by ati3414 on February 07, 2005 at 15:53:48:

In Reply to: Re: Real time subdivision posted by Scott Schaefer on February 01, 2005 at 17:49:37:

: : Are there examples of full animations of subdivision surfaces? That is, a textured object being animated while the composing surfaces are being adaptively subdivided?

: This may not be exactly what you were looking for, but Quake 3 had adaptively tesselated surfaces (textured) that were generated by Bezier patches. There is a subdivision algorithm for such surfaces so I think that qualifies.

Scott,

I talked with John Carmack. He has tried as you mention a Bezier real time subdivision. The consensus was that there is no such thing for subdivision surfaces (this was my original question). All subdivision surface generators take minutes(!) to run. This disqualifies such methods from being usable real time (i.e. they need to run in about 10ms).

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: : : Are there examples of full animations of subdivision surfaces? That is, a textured object being animated while the composing surfaces are being adaptively subdivided? : : This may not be exactly what you were looking for, but Quake 3 had adaptively tesselated surfaces (textured) that were generated by Bezier patches. There is a subdivision algorithm for such surfaces so I think that qualifies. : Scott, : I talked with John Carmack. He has tried as you mention a Bezier real time subdivision. The consensus was that there is no such thing for subdivision surfaces (this was my original question). All subdivision surface generators take minutes(!) to run. This disqualifies such methods from being usable real time (i.e. they need to run in about 10ms).

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