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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 Cobbs651March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould303March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert282March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik288March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert265March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik277March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert263March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik275March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert272March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs290March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith311March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann277March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik272March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould262March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann264March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann265March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik243March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann240March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik250March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg240March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs314March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik267March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs281March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik289March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs271March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik292March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert301March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs270March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert298March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik287March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert293March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik311March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert326March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs297March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould281March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs271March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik257March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs271March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs280March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik254March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik270March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert264March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain264March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik275March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith282March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert290March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik677March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann289March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert263March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould244March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano251March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert315March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould278March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik257March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould330March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik322March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert275March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik245March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert258March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik241March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert257March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik281March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs303March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert317March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould327March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert297March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould255March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert251March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould255March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik321March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert313March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs282March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik296March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs283March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik240March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert243March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs269March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs290March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert279March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs313March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert334March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano318March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert272March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano321March 27, 2013 01:48PM



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