 | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments —Kevin L. Clague
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| | | (...) Hi Rob, Not to be indelicate, but LDraw was around *before* OpenGL. That said, I think the document *must* explicitly show something like this: a b c d e f g h i Furthermore I think the document must explain x, y and z. If I remember correctly (...) (17 years ago, 28-Aug-07, to lugnet.cad)
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| | | | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments —Kevin L. Clague
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| | | | | (...) Let me restate the above.....because I think I'm wrong about the timeline. LDraw is a stand alone specification, so what OpenGL expects is not relevent. The LDraw specification must specify what its coordinate and matricies formats mean, (...) (17 years ago, 28-Aug-07, to lugnet.cad)
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| | | | | | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments —Travis Cobbs
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| | | | | | (...) I agree, and believe that both my proposed "sample matrices" as well as Tim's "transformation equation" will go into the final spec. --Travis (17 years ago, 28-Aug-07, to lugnet.cad)
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| | | | | | | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments —Kevin L. Clague
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| | | | | | (...) Travis, I'm quite satisfied with your dual format explanation. It is simple and concise. Kevin (17 years ago, 28-Aug-07, to lugnet.cad)
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| | | | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments —Travis Cobbs
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| | | | (...) Actually, SGI released OpenGL in 1992, and (according to ldraw.org) James released LDraw in 1995. So OpenGL predates LDraw by 3 years. (...) Good point. You are correct that -y is "up". I don't see that anywhere in the spec, and it's quite (...) (17 years ago, 28-Aug-07, to lugnet.cad)
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| | | | | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments —Steve Bliss
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| | | | (...) Also important is the fact that LDraw's model world is in a right-handed coordinate system. The current draft doesn't mention this. Steve (17 years ago, 28-Aug-07, to lugnet.cad)
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| | | | | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments —Travis Cobbs
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| | | | (...) Yes. That will go into the new "-y is up" section. I'm open to suggestions on the exact wording on this section, but I suspect that we can copy from the authors' guide document, which I believe already describes this. --Travis (17 years ago, 28-Aug-07, to lugnet.cad)
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| | | | | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments —Kevin L. Clague
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| | | | (...) I wanted to thank the LSC for their hard work on this topic. Good job bringing it to fruition. Kevin (Charter Member of the LSC) (17 years ago, 29-Aug-07, to lugnet.cad)
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