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Re: T-Junctions re-visited
March 19, 2013 11:43AM
Depending on your code structure, I think adding non-BFC support should be relatively cheap.

If you do not use an index structure to detect common edges, it will be a 2x cost - you'll have to try every edge twice, once in each direction.

If you do use an index structure to detect common edges*, it will be less than 2x, because the index lookup (the expensive part of the test) won't need repeating.

So I think that once you get into heavy optimization the non-BFC 'cost' will melt away a bit. :-) But your 'get it working first' approach is good I think....

* The idea is that with an index, you can easily find "all other vertices Vs that have the some location as V0" in something like logarithmic time, rather than linearly trying every vertex. For two tris to have a common edge, they will have a matched vertex via the index, regardless of winding - it is just a question of: once you find one matched vertex, do you go CW or CCW to find the other?

cheers
Ben
SubjectAuthorViewsPosted
T-Junctions re-visited Travis Cobbs884March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould466March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert411March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik424March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert395March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik379March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert372March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik383March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert379March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs403March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith412March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann397March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik380March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould389March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann370March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann400March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik341March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann340March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik332March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg354March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs419March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik382March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs380March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik389March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs365March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik426March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert442March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs412March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert477March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik468March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert410March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik428March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert451March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs422March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould426March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs390March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik388March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs419March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs392March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik371March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik398March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert374March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain400March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik439March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith440March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert493March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik917March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann450March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert381March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould346March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano339March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert417March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould371March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik414March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould473March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik439March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert384March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik338March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert348March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik337March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert387March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik389March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs457March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert469March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould456March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert434March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould375March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert367March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould386March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik461March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert437March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs415March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik400March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs423March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik340March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert329March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs370March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs456March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert415March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs442March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert502March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano446March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert371March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano470March 27, 2013 01:48PM



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