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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 Cobbs644March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould298March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert279March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik286March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert259March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik269March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert260March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik271March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert264March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs288March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith308March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann275March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik267March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould257March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann259March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann256March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik239March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann237March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik247March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg238March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs309March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik266March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs275March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik285March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs265March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik286March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert295March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs265March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert292March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik280March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert283March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik308March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert318March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs290March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould277March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs265March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik254March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs267March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs270March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik246March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik265March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert259March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain262March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik270March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith276March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert287March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik671March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann284March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert261March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould242March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano245March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert309March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould272March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik251March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould323March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik314March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert269March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik238March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert254March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik236March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert253March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik276March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs298March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert307March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould320March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert286March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould250March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert249March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould250March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik313March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert306March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs277March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik292March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs277March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik235March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert237March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs262March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs283March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert274March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs306March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert330March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano314March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert265March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano315March 27, 2013 01:48PM



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