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(...) I think the original suggestion that we mention that it is in row-major format is valid. I agree that the fact that OpenGL (almost certainly one of the top two most used 3D APIs on the planet) uses column major format is a good reason to (...) (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) The "so-what" would be that I, as someone who will eventually read in these files to create OpenGL renderings of them, would expect the matrices to be in column-major order, unless explicitly stated otherwise. Rob (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) Umm, so what? LDraw is not, and should not, be dependent on OpenGL. Having worked with transformation matrix in both formats, I find the row-major format much easier to hand-edit than column-major organization. At least for LDraw-type usage (...) (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) Page 16 of the OpenGL spec, v2.1 states: "Only convex polygons are guaranteed to be drawn correctly by the GL." Rob (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) Is this really what the LDRAW spec is stating? Because that would be contrary to the OpenGL spec, in which the standard ordering of matrices is column-major. So if you have a row like a b c d e f g h That would be interpreted in OpenGL as a e (...) (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Looking for 7819 as a .DAT file
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Hi, I found 7740, 7815 and 7820 on brickshelf but unfortunately no 7819, does anyone has it as a file maybe? Why do I am looking for that? I want to include a lego room in my website (www.adri.de) with my (and maybe your?) lego MOCS and sets and (...) (17 years ago, 21-Aug-07, to lugnet.cad.dat.models)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) After reading the text (Great work on part of the LSC), these are my comments. I think it would be helpful to mention the used matrix in line type 1 is row orientated (more clearly then 'standard matrix'). A paragraph about line type 1 (...) (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) Keep in mind, the original LDraw tool treats concave quads as triangles, effectively ignoring the contained vertex. So, by the 0.27 "spec", concave quads are inappropriate. Which can be translated as they are disallowed, but the renderer copes (...) (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(I'll comment on other items later, but want to get this out ASAP.) (...) This is a question for both Orion and the LDraw part library admins. If I write a program that splits all the concave quads in all existing official parts into two triangles, (...) (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) I'm not sure yet what we on the LSC will decide with respect to concave quads. It may be that we'll change that paragraph to a recommendation. I personally don't like them, but I can see Orion's point. I may write a utility program to (...) (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: Looking for 7740 as a .DAT file
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O.k., finally found it on brickshelf... cu, adrian (17 years ago, 21-Aug-07, to lugnet.cad.dat.models)
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| | Re: Looking for 9V switch as a .DAT file
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Thats is, thanks Manfred! (17 years ago, 21-Aug-07, to lugnet.cad.dat.parts)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) Actually I find it quite logically it's not supported. And I don't think it's a specific OpenGL thing. Once the vertices's are not concave, you basically stop having a Quad all to getter. It becomes a polygon, and how is the hardware supposed (...) (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) Hi there. I'm just getting up to speed with OpenGL so it will be a little while before I can really sink my teeth into this. But, one thing I have learned so far is that the rule about non-concave quads is actually a limitation of OpenGL. It (...) (17 years ago, 21-Aug-07, to lugnet.cad)
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| | Re: Looking for 9V switch as a .DAT file
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Or are you looking for this kind of switches: (URL) friendly greetings, Manfred. (17 years ago, 20-Aug-07, to lugnet.cad.dat.parts)
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| | Re: Looking for 9V switch as a .DAT file
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(...) Do you prehaps mean part 6551.DAT - Electric Technic Pole Reverser? It is in the official parts library. With friendly greetings, Manfred. (17 years ago, 20-Aug-07, to lugnet.cad.dat.parts)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) OK, I read the whole post and am reposting my comments here :-) Here are my comments. I'll delineate the section where appropriate. Purpose: "standard by which most create virtual LEGO® models" Due to past personal conflicts and missteps too (...) (17 years ago, 20-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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William Howard schrieb: (...) "Write/Print" Please add a note that this is not allowed in official parts files on the PT. "File Type" In the way your wrote this artikel it is very confusing for newbees. It should be divided in two portions. Official (...) (17 years ago, 20-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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William Howard schrieb: (...) "Every line of the file contains one command. With one exception, every command is independent of other lines. The exception is the BFC INVERTNEXT command which modifies the behaviour of the immediately following (...) (17 years ago, 20-Aug-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) And if we hadn't been granted an extended term (to get the voting out of summer holidays), we probably wouldn't have gotten the job done either (not that we have yet, but there's every indication that we will). I wonder if that would have (...) (17 years ago, 20-Aug-07, to lugnet.cad)
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