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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 Cobbs612March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould283March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert256March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik269March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert251March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik252March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert247March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik257March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert250March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs274March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith297March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann260March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik259March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould242March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann244March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann237March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik221March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann224March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik227March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg226March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs290March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik250March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs258March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik263March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs254March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik266March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert273March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs249March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert273March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik260March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert262March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik284March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert302March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs273March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould258March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs246March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik236March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs253March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs253March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik227March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik250March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert243March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain250March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik251March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith261March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert269March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik651March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann271March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert247March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould227March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano231March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert295March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould256March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik238March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould300March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik294March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert249March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik227March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert235March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik218March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert233March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik263March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs280March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert286March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould303March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert267March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould225March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert234March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould239March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik299March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert287March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs262March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik274March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs259March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik215March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert224March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs247March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs270March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert263March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs294March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert316March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano299March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert247March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano297March 27, 2013 01:48PM



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