Special:
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[DAT] (requires LDraw-compatible viewer)
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Subject:
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Re: Reiterate: How to make a squish matrix?
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Newsgroups:
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lugnet.cad, lugnet.cad.ray
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Date:
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Wed, 25 Apr 2001 00:20:58 GMT
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Viewed:
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639 times
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i thought you just had to multiply your matrix with something like
1 0 0
0 2 0
0 0 1
this would make Y 2 times as long.
Not?
Koen
Don Heyse <dheyse@hotmail.spam.go.away.com> schreef in berichtnieuws
GCBD52.3qI@lugnet.com...
> A quick keyword search turns up this page which states that it is NOT
> possible (in one of the first few paragraphs).
>
>
http://www.google.com/search?q=cache:enphilistor.users4.50megs.com/matrix.ht
m+matrix+cylinder+cone+shear&hl=en
>
> Sorry,
>
> Don
>
>
> In lugnet.cad, Jeremy H. Sproat writes:
> > In lugnet.cad, Jeremy H. Sproat writes:
> > > Is there a way I can make a matrix that will "squish" an object?
> >
> > Whoops!
> >
> > Thank you Rui for helping me straighten this out -- I'm not doing this in
> > LDraw. I'm just looking for a way to do this with a 4x4 matrix. My • target
> > app is POVRay, but I figured this question would be generic enough for
> > people in the .cad group.
> >
> > So, to reiterate: I'm looking for a 4x4 transform matrix that "squishes" • an
> > object; e.g. a cylinder into a truncated cone.
> >
> > I don't know if it's possible to get this transformation from a matrix. • I
> > thought I've seen one before, but I can't find any reference to one now.
> >
> > Cheers,
> > - jsproat
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