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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 Cobbs730March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould356March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert336March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik352March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert330March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik321March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert309March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik321March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert323March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs344March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith346March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann330March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik313March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould316March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann307March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann332March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik280March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann277March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik280March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg304March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs354March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik318March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs314March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik320March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs313March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik335March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert349March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs321March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert396March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik360March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert326March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik342March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert363March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs336March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould326March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs312March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik301March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs328March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs315March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik293March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik323March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert297March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain322March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik368March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith346March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert355March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik767March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann356March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert319March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould287March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano283March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert357March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould312March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik323March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould364March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik367March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert310March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik279March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert290March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik279March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert297March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik314March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs352March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert365March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould364March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert353March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould319March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert288March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould302March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik371March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert365March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs346March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik337March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs349March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik270March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert275March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs312March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs368March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert321March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs355March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert398March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano353March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert303March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano377March 27, 2013 01:48PM



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