 | | BFCFixer —Mark Tarrabain
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| | | (...) Well, I had some spare time today... so I wrote one. It goes through a single LDraw part file and reorients all the polygons in it to have the same winding. It comprehends the notion of subfiles and already BFC compliant parts, and puts the (...) (20 years ago, 3-Feb-05, to lugnet.cad.dev)
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| | | | | Re: BFCFixer —Chris Dee
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| | | | | (...) I may be being dense here, but I dont understand how this can be done programatically. The point of BFC is to allow renderers to understand if a particular polygon is facing the camera or facing away from it. If all polygons are wound (...) (20 years ago, 3-Feb-05, to lugnet.cad.dev)
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| | | | | | | Re: BFCFixer —Ross Crawford
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| | | | | | | (...) I think it can be done for simple objects, by choosing a random winding for 1 polygon, then processing all touching polygons so they're wound the same way (when looking from the same side - out ot in). This would produce a result that is (...) (20 years ago, 3-Feb-05, to lugnet.cad.dev)
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| | | | | | | | | Re: BFCFixer —Chris Dee
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| | | | | | | | (...) Of course, it's that simple - thanks. Except some of the most basic LDraw parts (regular bricks) fail this test because the studs are "stuck on" a complete quad, rather than a surface peppered with stud-sized holes. Chris (20 years ago, 4-Feb-05, to lugnet.cad.dev)
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| | | | | | | | | | Re: BFCFixer —Mark Tarrabain
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| | | | | | | | (...) Such components are handled correctly by BFCFixer as "detached" submodels, and are oriented consistently with the rest of the polygons in the file as long as each independant submodel is sufficiently enclosed that a correct winding can be (...) (20 years ago, 5-Feb-05, to lugnet.cad.dev)
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| | | | | | | Re: BFCFixer —Steve Bliss
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| | | | | | (...) The way it's been done before is to draw rays from the origin outward. The first polygon a ray crosses is facing inward, and the last polygon a ray crosses would be facing outward. The ones in between *should* alternate facing in and out. Do (...) (20 years ago, 3-Feb-05, to lugnet.cad.dev)
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| | | | | Re: BFCFixer —Steve Bliss
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| | | | (...) Oh yeah! Let me at it. :) Steve (20 years ago, 3-Feb-05, to lugnet.cad.dev)
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| | | | | | Re: BFCFixer —Mark Tarrabain
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| | | | (...) Ask, and ye shall receive. (URL) code is included (hopefully my crude hackings can be deciphered by others) as well as an executable jarfile in the dist/ subdirectory. Enjoy. If you find any major bugs, let me know, and I'll see what I can do, (...) (20 years ago, 3-Feb-05, to lugnet.cad.dev)
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| | | | | | Re: BFCFixer —Dan Boger
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| | | | (...) Would you guys want a code repository for this? I have a SVN repo set up that I could easily add this as a project... Just LMK! (20 years ago, 3-Feb-05, to lugnet.cad.dev)
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