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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 Cobbs687March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould333March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert318March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik320March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert302March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik295March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert293March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik303March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert307March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs313March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith331March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann300March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik297March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould294March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann289March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann301March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik261March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann263March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik265March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg262March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs342March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik297March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs298March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik310March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs298March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik315March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert323March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs296March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert345March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik329March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert311March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik330March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert348March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs318March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould305March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs296March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik288March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs297March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs303March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik280March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik294March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert280March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain290March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik331March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith317March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert319March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik727March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann325March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert293March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould265March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano272March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert340March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould301March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik295March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould347March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik345March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert292March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik259March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert274March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik258March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert280March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik303March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs330March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert344March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould351March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert327March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould283March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert277March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould277March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik347March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert339March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs313March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik324March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs318March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik257March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert261March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs299March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs338March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert310March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs335March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert371March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano343March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert288March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano351March 27, 2013 01:48PM



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