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Subject:	Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
Newsgroups:	lugnet.cad
Date:	Tue, 21 Aug 2007 20:43:23 GMT
Viewed:	4205 times

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

Message has 1 Reply:

		Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
(...) 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)

Message is in Reply To:

		Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
(...) 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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