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Re: T-Junctions re-visited
avatarMarch 18, 2013 12:28PM
Quote
Ben Supnik
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.

When implementing LDView's smoothing, I actually considered using the un-normalized cross product as the input to the average calculation. Since the magnitude of the cross product is proportional to the area of the triangle, I think this would result in correct surface normals in the case of a cylinder. However, in order for it to work, quads would in fact have to be split into triangles, and my smoothing code acts on the quads.
SubjectAuthorViewsPosted
T-Junctions re-visited Travis Cobbs761March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould375March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert356March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik376March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert347March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik335March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert327March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik335March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert329March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs357March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith363March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann351March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik333March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould334March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann321March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann360March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik295March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann285March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik290March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg316March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs366March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik333March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs326March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik331March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs323March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik347March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert373March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs345March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert415March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik384March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert335March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik355March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert382March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs351March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould343March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs328March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik315March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs352March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs324March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik310March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik344March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert307March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain345March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik391March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith366March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert394March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik808March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann383March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert336March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould304March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano295March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert375March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould324March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik348March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould391March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik390March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert333March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik292March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert301March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik295March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert321March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik323March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs393March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert399March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould377March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert380March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould338March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert299March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould323March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik386March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert385March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs362March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik350March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs371March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik282March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert283March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs324March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs393March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert351March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs373March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert425March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano364March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert314March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano405March 27, 2013 01:48PM



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