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Skewing in official parts - Printable Version +- LDraw.org Discussion Forums (https://forums.ldraw.org) +-- Forum: Models and Parts (https://forums.ldraw.org/forum-18.html) +--- Forum: Parts Authoring (https://forums.ldraw.org/forum-19.html) +--- Thread: Skewing in official parts (/thread-13690.html) |
Skewing in official parts - Roland Melkert - 2014-08-14 As a result of this thread, I'm wondering are there any parts in the library using skewing (of base scaled reference), is it even legal? I need to know to decide if it's worth the needed rewrites to my texmap meta implementation. Re: Skewing in official parts - Magnus Forsberg - 2014-08-14 Deformation of primitives a is very common practice: http://jc-tchang.philohome.com/manuel/prim_def.htm but I can't remember ever seeing it on a part. Re: Skewing in official parts - Tim Gould - 2014-08-14 I think I've used it before, but couldn't tell you on what part. I just vaguely remember working out the skewing matrix sometime in the past. Perhaps the texmap extension could demand no skewing. I can't see it being useful in more than a tiny fraction of cases, and even then it might be more trouble than it's worth since the texture would have to contain unskewing to look OK. Tim Re: Skewing in official parts - Philippe Hurbain - 2014-08-15 I am pretty sure I used it... Dunno where! Re: Skewing in official parts - Travis Cobbs - 2014-08-15 I have a vague recollection of having seen a skewed sphere primitive in some official part, but I could be wrong about that. Re: Skewing in official parts - Roland Melkert - 2014-08-16 Thanks guys, It's only a problem when the skewed referenced part uses local TEXMAP info. And I'm guessing the skew usages are mostly for the general shaping of stuff which then might be mapped on a higher level, thus nullifying the problem. Anyway I decided to not change my current approach until some part actually needs it, as the solution will slow down calculations for all other usage. Re: Skewing in official parts - Mark Kennedy - 2014-08-18 The skewing of box primitives should be fine and I think that some of the windshield parts may use skewed cylinders. |