Welcome! Log In Create A New Profile

Advanced
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 Cobbs543March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould235March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert203March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik207March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert204March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik197March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert187March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik204March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert197March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs232March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith236March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann212March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik206March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould201March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann201March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann177March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik172March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann178March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik180March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg181March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs199March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik202March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs203March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik204March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs199March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik214March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert207March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs195March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert192March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik207March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert202March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik212March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert226March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs203March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould205March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs199March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik184March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs198March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs193March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik171March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik189March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert195March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain191March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik201March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith189March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert208March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik523March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann209March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert203March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould191March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano183March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert237March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould198March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik187March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould254March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik232March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert203March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik192March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert183March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik174March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert186March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik209March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs225March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert230March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould236March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert209March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould172March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert187March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould188March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik234March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert234March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs201March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik207March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs201March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik175March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert177March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs196March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs209March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert198March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs230March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert240March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano226March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert191March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano231March 27, 2013 01:48PM



Sorry, only registered users may post in this forum.

Click here to login