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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Tue, 24 Apr 2001 20:34:14 GMT
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Viewed:
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32 times
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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.htm+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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Message has 1 Reply:
 | | Re: Reiterate: How to make a squish matrix? [DAT]
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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....away.com> schreef in berichtnieuws GCBD52.3qI@lugnet.com... (...) (URL) (...) target (...) (24 years ago, 25-Apr-01, to lugnet.cad, lugnet.cad.ray)
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Message is in Reply To:
| | Reiterate: How to make a squish matrix?
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| (...) 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 (...) (24 years ago, 24-Apr-01, to lugnet.cad, lugnet.cad.ray)
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