Special:
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[DAT] (requires LDraw-compatible viewer)
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Subject:
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Re: View matrix used for default 3D view expressed in LDLite terms
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Newsgroups:
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lugnet.cad.mlcad
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Date:
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Tue, 23 Oct 2001 14:29:46 GMT
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Viewed:
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3115 times
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In lugnet.cad.mlcad, Larry Pieniazek writes:
> But I sort of (as Kevin does) need the way to generate the rotation matrix
> from a dialed in rotation value... if someone has a spread that does that,
> it would be nifty.
A general, reproducible, adjustable, redo-able solution to this is to write
up a couple of LDLite's ROTATION commands, and then translate the commands
to standard LDraw gdl.
For example, to duplicate MLCAD's view, write:
0 ROTATE 23 1 0 0
0 ROTATE 45 0 1 0
1 16 0 0 0 1 0 0 0 1 0 0 0 1 3001.dat
0 ROTATE END
0 ROTATE END
Translated, this comes out to:
1 16 0 0 0 .7071 0 .7071 .2763 .9205 -.2763 -.6509 .3907 .6509 3001.dat
Those numbers should look vaguely familiar to readers of this thread. :)
BTW, either LDLite or LDAO will do the translation for you. I think LDAO is
a bit more convenient. But I'm probably biased.
Steve
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