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Re: T-Junctions re-visited
March 15, 2013 05:08PM
Yep - this is exactly what I saw when I had triangulation on. But I think in theory a weighting by arc-angle could fix this. Two of the three triangles at a given vertex will share 90 degrees of "span" and the other will have 90 to itself - by this weighting, normals will go back to vertical. I don't know what the effect would be on other shapes.

BrickSmith currently uses non-indexed primitives, and in that configuration, breaking quads into tris is a net performance loss:
- It increases vertex count.
- We hardware-instance together multiple bricks, so our total draw calls is low - so calling glDrawArraysXXX twice isn't a huge problem. (The mac drivers also do a good job of getting the second draw call out quick if no state has been changed.)

I plan to re-measure this once I have indexing working - the indexer is partly done and it looks like it will cut VBO size in half or better.

cheers
Ben
SubjectAuthorViewsPosted
T-Junctions re-visited Travis Cobbs574March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould255March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert229March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik233March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert229March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik223March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert209March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik229March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert219March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs247March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith264March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann231March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik232March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould224March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann223March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann202March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik196March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann195March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik203March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg203March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs228March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik225March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs232March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik227March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs227March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik243March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert240March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs222March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert225March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik236March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert235March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik242March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert274March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs244March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould233March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs220March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik206March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs221March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs219March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik205March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik221March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert223March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain222March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik222March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith222March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert236March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik589March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann237March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert229March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould205March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano209March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert266March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould225March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik209March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould268March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik264March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert227March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik209March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert215March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik194March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert210March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik235March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs255March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert261March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould273March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert234March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould197March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert212March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould208March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik268March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert256March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs230March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik244March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs228March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik195March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert203March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs219March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs236March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert231March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs259March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert271March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano264March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert217March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano265March 27, 2013 01:48PM



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