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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 Cobbs712March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould347March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert330March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik330March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert319March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik300March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert299March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik313March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert312March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs334March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith341March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann323March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik307March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould304March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann298March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann322March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik271March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann273March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik277March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg289March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs349March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik308March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs308March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik318March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs303March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik326March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert339March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs310March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert377March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik345March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert321March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik338March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert354March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs326March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould320March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs307March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik296March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs318March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs310March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik289March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik313March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert288March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain308March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik350March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith334March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert335March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik744March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann343March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert304March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould275March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano281March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert351March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould308March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik310March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould355March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik355March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert301March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik269March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert282March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik264March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert288March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik310March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs342March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert356March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould358March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert339March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould295March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert286March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould292March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik362March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert353March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs335March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik333March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs338March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik266March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert266March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs305March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs358March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert319March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs349March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert387March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano352March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert296March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano365March 27, 2013 01:48PM



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