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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 Cobbs669March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould319March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert306March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik305March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert283March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik284March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert271March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik286March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert291March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs299March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith319March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann285March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik285March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould282March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann276March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann288March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik252March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann251March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik258March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg250March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs329March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik283March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs291March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik300March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs283March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik302March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert312March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs279March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert330March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik316March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert302March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik326March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert335March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs311March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould293March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs285March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik273March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs283March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs289March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik270March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik284March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert274March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain279March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik308March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith304March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert305March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik704March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann303March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert275March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould254March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano264March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert326March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould293March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik277March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould340March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik335March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert282March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik253March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert270March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik246March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert267March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik295March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs315March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert328March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould342March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert311March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould269March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert262March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould266March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik333March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert326March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs292March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik313March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs302March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik248March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert254March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs280March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs317March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert294March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs329March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert348March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano335March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert280March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano337March 27, 2013 01:48PM



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