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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 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 Melkert301March 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 Supnik249March 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 Supnik273March 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 Cobbs246March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs270March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert262March 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 Melkert246March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano297March 27, 2013 01:48PM



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