T-Junctions re-visited

Re: T-Junctions re-visited
#39
The driver almost certainly does convert the quad to triangles, but the calculated average surface normal will be different, because with quads, the point has exactly two contributing normals, which averate to a normal pointing away from the centerline of the cylinder (as desired). However, when the normal smoothing is done on the triangles, one facet will have two triangles contributing to the given point, while the other facet only has one. This will cause the normals on the bottom of the cyllinder to get pulled one way (say clockwise), while the top ones get pulled the opposite way (say counterclockwise). This leads to visible artifacts.
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 Messages In This Thread T-Junctions re-visited - by Travis Cobbs - 2013-03-12, 5:38 Re: T-Junctions re-visited - by Tim Gould - 2013-03-12, 6:31 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-12, 18:17 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-12, 18:17 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-12, 18:22 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-12, 18:32 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-12, 18:41 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-12, 18:55 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-13, 17:08 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-13, 18:27 Re: T-Junctions re-visited - by Allen Smith - 2013-03-12, 21:01 Re: T-Junctions re-visited - by Michael Heidemann - 2013-03-13, 16:27 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-13, 17:37 Re: T-Junctions re-visited - by Tim Gould - 2013-03-13, 21:31 Re: T-Junctions re-visited - by Michael Heidemann - 2013-03-13, 22:42 Re: T-Junctions re-visited - by Michael Heidemann - 2013-03-17, 11:35 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-17, 15:43 Re: T-Junctions re-visited - by Michael Heidemann - 2013-03-17, 15:59 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-17, 16:02 Re: T-Junctions re-visited - by Magnus Forsberg - 2013-03-17, 16:15 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-18, 5:09 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-18, 14:30 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-18, 17:57 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-18, 18:27 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-18, 19:23 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-18, 20:41 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-18, 21:51 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-18, 21:59 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-18, 22:41 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-19, 1:09 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-19, 18:38 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-19, 18:43 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-20, 2:07 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-20, 5:13 Re: T-Junctions re-visited - by Tim Gould - 2013-03-20, 10:56 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-20, 17:13 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-20, 17:23 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-20, 17:29 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-20, 17:26 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-20, 18:18 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-20, 13:42 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-20, 18:36 Re: T-Junctions re-visited - by Philippe Hurbain - 2013-03-20, 13:36 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-20, 13:58 Re: T-Junctions re-visited - by Allen Smith - 2013-03-20, 16:08 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-20, 18:35 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-20, 18:50 Re: T-Junctions re-visited - by Michael Heidemann - 2013-03-18, 22:54 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-13, 17:03 Re: T-Junctions re-visited - by Tim Gould - 2013-03-13, 22:56 Re: T-Junctions re-visited - by Sergio Reano - 2013-03-13, 22:51 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-13, 23:36 Re: T-Junctions re-visited - by Tim Gould - 2013-03-14, 0:10 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-15, 3:17 Re: T-Junctions re-visited - by Tim Gould - 2013-03-15, 3:41 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-15, 17:56 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-15, 18:36 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-14, 1:58 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-14, 2:27 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-14, 2:37 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-14, 2:59 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-14, 3:18 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-14, 22:23 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-14, 22:34 Re: T-Junctions re-visited - by Tim Gould - 2013-03-14, 22:41 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-15, 18:33 Re: T-Junctions re-visited - by Tim Gould - 2013-03-14, 2:43 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-14, 3:08 Re: T-Junctions re-visited - by Tim Gould - 2013-03-14, 3:18 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-15, 3:15 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-15, 18:29 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-15, 19:27 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-16, 0:08 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-17, 6:29 Re: T-Junctions re-visited - by Ben Supnik - 2013-03-17, 15:58 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-17, 19:35 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-18, 19:28 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-18, 19:32 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-19, 0:00 Re: T-Junctions re-visited - by Travis Cobbs - 2013-03-19, 6:05 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-19, 18:38 Re: T-Junctions re-visited - by Sergio Reano - 2013-03-26, 21:46 Re: T-Junctions re-visited - by Roland Melkert - 2013-03-27, 18:19 Re: T-Junctions re-visited - by Sergio Reano - 2013-03-27, 20:48

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