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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 Cobbs888March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould468March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert413March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik425March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert400March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik382March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert375March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik384March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert382March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs405March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith413March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann400March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik380March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould390March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann371March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann401March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik342March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann341March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik333March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg355March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs419March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik384March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs381March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik392March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs366March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik427March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert444March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs415March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert479March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik472March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert412March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik431March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert453March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs426March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould431March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs394March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik391March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs423March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs396March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik376March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik399March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert376March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain401March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik442March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith442March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert497March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik918March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann450March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert384March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould347March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano340March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert420March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould373March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik417March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould474March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik440March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert387March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik340March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert349March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik339March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert388March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik394March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs460March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert471March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould459March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert435March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould376March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert369March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould387March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik465March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert437March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs419March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik404March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs425March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik341March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert329March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs372March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs460March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert417March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs443March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert506March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano448March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert371March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano472March 27, 2013 01:48PM



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