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, 28 Aug 2007 20:40:08 GMT
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Viewed:
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4385 times
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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.
>
> So if you have a row like
>
> a b c d e f g h
>
> That would be interpreted in OpenGL as
>
> a e
> b f
> c g
> d h
>
> and NOT
>
> a b c d
> e f g h
>
>
> Rob
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 above the origin, y is negative.
Kevin
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