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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 Cobbs929March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould487March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert426March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik440March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert414March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik398March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert387March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik401March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert393March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs419March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith428March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann413March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik390March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould399March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann382March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann413March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik358March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann356March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik343March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg372March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs432March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik400March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs395March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik404March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs376March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik450March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert462March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs438March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert504March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik491March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert433March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik443March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert468March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs444March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould450March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs410March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik407March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs436March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs413March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik391March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik413March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert389March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain414March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik452March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith464March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert525March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik938March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann477March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert396March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould364March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano351March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert440March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould386March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik433March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould486March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik451March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert397March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik350March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert368March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik350March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert408March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik410March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs479March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert492March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould477March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert450March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould385March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert384March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould406March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik480March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert447March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs427March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik414March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs438March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik352March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert342March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs380March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs481March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert435March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs461March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert523March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano466March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert384March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano494March 27, 2013 01:48PM



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