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Re: Question about edges
avatarMarch 10, 2013 11:35AM
It would be nice to have an universal guide line.

As a result to Philippe's answer above I decided to try my original approach but without using any edge information at all. So by just looking at angles (acos'ed dot products actually) to decide to group stuff or not.

It works remarkably well, so well in fact I'm kinda glad I dropped the edges approach :)



This is using the (ludicrously wide) angle threshold of 60 degrees, could probably lower that to 30 or so, haven't decided on that.

Downfall is things go 'weird' with high details on a curved surface, like minfig heads which seem to have a crumbled paper thing going on. I'm not complety sure this is the result of the general algorithm or a minor bug on my side.



But in general this approach's results ares very acceptable given the cost. Could probably optimize things to bring it at a loading level only slightly slower then the current LDCad loading times.

If we are serious about helping smoothing by introducing rules on the library, some kind of hint system would be most useful. Like: these following triangles all lay on a curved quad. A bit like the texture projection hints. This would make it possible to generate normals based on a common (cylinder) center instead of the surrounding triangle normals.
SubjectAuthorViewsPosted
Question about edges Roland Melkert542March 08, 2013 12:41PM
Re: Question about edges Philippe Hurbain237March 08, 2013 11:07PM
Re: Question about edges Roland Melkert242March 09, 2013 11:11AM
Re: Question about edges Philippe Hurbain227March 09, 2013 11:25AM
Re: Question about edges Roland Melkert247March 09, 2013 12:23PM
Re: Question about edges Ben Supnik235March 09, 2013 08:18PM
Re: Question about edges Philippe Hurbain238March 09, 2013 10:53PM
Re: Question about edges Roland Melkert281March 10, 2013 11:35AM
Re: Question about edges Philippe Hurbain255March 10, 2013 12:00PM
Re: Question about edges Ben Supnik253March 10, 2013 04:11PM
Re: Question about edges Roland Melkert264March 10, 2013 04:32PM
Re: Question about edges Ben Supnik261March 10, 2013 07:31PM
Re: Question about edges Travis Cobbs242March 10, 2013 10:19PM
Re: Question about edges Ben Supnik234March 10, 2013 11:20PM
Re: Question about edges Tim Gould300March 10, 2013 11:40PM
Re: Question about edges Ben Supnik238March 11, 2013 11:52AM
Re: Question about edges Roland Melkert236March 11, 2013 01:31PM
Re: Question about edges Tim Gould244March 11, 2013 01:58PM
Re: Question about edges Roland Melkert234March 11, 2013 04:48PM
Re: Question about edges Tim Gould255March 11, 2013 04:57PM
Re: Question about edges Roland Melkert217March 11, 2013 06:02PM
Re: Question about edges Tim Gould234March 11, 2013 06:24PM
Re: Question about edges Travis Cobbs247March 11, 2013 10:12PM
Re: Question about edges Tim Gould257March 11, 2013 02:07PM
Re: Question about edges Ben Supnik282March 22, 2013 03:33PM
Re: Question about edges Tim Gould271March 22, 2013 03:44PM
Re: Question about edges Ben Supnik277March 22, 2013 04:48PM
Re: Question about edges Philippe Hurbain327March 23, 2013 01:49AM
Re: Question about edges Travis Cobbs228March 11, 2013 11:20AM
Re: Question about edges Roland Melkert248March 11, 2013 01:50PM
Re: Question about edges Roland Melkert213March 12, 2013 11:15AM
Re: Question about edges Ben Supnik233March 12, 2013 11:24AM
Re: Question about edges Roland Melkert215March 12, 2013 11:37AM
Re: Question about edges Travis Cobbs216March 09, 2013 10:57PM



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