Subject:
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Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
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Newsgroups:
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lugnet.cad
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Date:
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Wed, 22 Aug 2007 09:21:27 GMT
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Viewed:
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4873 times
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In lugnet.cad, Travis Cobbs wrote:
> In lugnet.cad, Rob Ross wrote:
> > 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.
>
> 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 specify that LDraw uses row-major format, instead of just saying "standard".
> It just proves that "standard" in this context is ambiguous.
>
> --Travis
I came across the *current* LDraw file spec here:
http://www.ldraw.org/Article45.html
and the matrix example is using column-major ordering. So now I'm really
confused. Does the current spec use column-major, and the new spec is proposing
to change it? Or is the current spec wrong in using that column-major example?
If it's really a change in the spec, won't that break everyone's existing code?
Rob
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