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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 Cobbs796March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould402March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert375March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik392March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert361March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik348March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert340March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik350March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert347March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs369March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith379March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann365March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik352March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould351March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann337March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann373March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik307March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann307March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik302March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg327March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs382March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik346March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs337March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik348March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs338March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik375March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert391March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs365March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert432March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik405March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert358March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik377March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert400March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs373March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould373March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs344March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik336March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs364March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs344March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik326March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik363March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert323March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain359March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik406March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith386March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert425March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik849March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann398March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert353March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould319March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano310March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert388March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould338March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik364March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould413March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik407March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert353March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik305March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert315March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik312March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert337March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik338March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs404March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert417March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould399March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert403March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould351March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert319March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould339March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik404March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert395March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs378March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik363March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs387March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik293March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert294March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs338March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs411March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert365March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs392March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert445March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano389March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert331March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano428March 27, 2013 01:48PM



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