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 21:46:05 GMT
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Viewed:
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5202 times
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In lugnet.cad, Leonardo Zide wrote:
> The same is true for LDraw, it's not really column or row major. All you need
> to explain is that line type 1 is an array of floats that form a matrix and
> you're using a column major notation and post multiplying the matrices for
> reference in the spec but the LDraw standard is not column major, you can get
> the same exact results by pre multiplying using row major matrices.
I think we'll just include two examples of how the data would go into a matrix
in the two different directions and leave it at that. At this point, I think
the best thing would be to add something like the following to the currently
proposed spec:
This matrix has two common representations, both of them equally valid, shown
below. Feel free to use the one that matches your expectations.
| a d g 0 | | a b c x |
| b e h 0 | | d e f y |
| c f i 0 | | g h i z |
| x y z 1 | | 0 0 0 1 |
> While at it, please disallow spaces in filenames in line type 1.
This is why so many novice computer users think that computers are hard to use.
Developers make arbitrary (and totally unnecessary) restrictions like this, and
then don't understand when the users complain. They tell the users that they
are wrong. Well, I'm here to tell you, spaces in filenames are a fact of life,
and not supporting them in your software is bad. Disallowing them in a general
file spec like this is, in my opinion, totally unconscionable.
--Travis
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