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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Tue, 21 Aug 2007 21:29:43 GMT
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Viewed:
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7909 times
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In lugnet.cad, Steve Bliss wrote:
> In lugnet.cad, Rob Ross wrote:
> > >
> > > I think it would be helpful to mention the used matrix in line type 1 is
> > > row orientated (more clearly then 'standard matrix').
> >
> > > Just my thoughts,
> > >
> > > Roland
> >
> > 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.
>
> 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 (ie, editing part files and model files).
>
> Steve
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
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