 | | Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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(...) I'm new to this community, and am just learning 3D graphics, but I will comment on this as someone who will eventually use this file format to read in and render these parts in 3D. 1. Character encoding - for a file spec, not specifying this (...) (19 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 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 (...) (19 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 (19 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 (...) (19 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 (19 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 (...) (19 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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(...) 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 (...) (19 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 (...) (19 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, (...) (19 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 (...) (19 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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(...) 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 (...) (19 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 (...) (19 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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(...) 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 (...) (19 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 (...) (19 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 (...) (19 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 (...) (19 years ago, 20-Aug-07, to lugnet.cad)
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| | LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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Like all previous LSCs, the 2006/7 LSC was charged with ratifying the LDraw File Format 1.0 specification. After much work checking, and ratifying as necessary, all linked specs and language extensions, and many months of dicussions about the actual (...) (19 years ago, 20-Aug-07, to lugnet.cad) !
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| | "Building with Bricksmith" screencast video
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I have recorded a silent video "screencast" of the creation of my most recent (URL) LDraw model> (yet another B-Wing variant). It is not a short video, but it shows the whole process from start to finish. Watching it has already given me a few ideas (...) (19 years ago, 19-Aug-07, to lugnet.announce, lugnet.cad, lugnet.cad.dev.mac, FTX)
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| | Re: Selling prints of LDraw renders
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(...) Ok, thanks guys. As I've looked into logistics in other areas (would people even be interested in buying prints/cards/etc. of LDraw scenes? I have a feeling it would be difficult to turn any kind of profit with this.) I'm not sure how far I'll (...) (19 years ago, 14-Aug-07, to lugnet.cad, FTX)
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| | Re: Selling prints of LDraw renders
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(...) Given the way the software is made available, I would hope that anyone considering turning a profit from it might consider earmarking a portion of the proceeds to Ldraw.org - like Tim Courtney did from the sales of (URL) Virtual Lego>. Cheers (...) (19 years ago, 14-Aug-07, to lugnet.cad, FTX)
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