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Does anyone have any idea how I can make an object rotate randomly?
Making an object rotate about a random axis is easy enough. But I want
the axis to *change* over time.
I could use the old trick of rotating about several axies at different
speeds to make it /look/ random... Does anyone have a better idea?
Andrew.
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Andrew the Orchid wrote:
> Does anyone have any idea how I can make an object rotate randomly?
>
> Making an object rotate about a random axis is easy enough. But I want
> the axis to *change* over time.
Hmm. Maybe having the object rotated 180 degrees around a changing axis that
you get from the vturbulence() function? Even though the 180 degrees don't
change over time, it will look like the object is rotating randomly, I
think.
Rune
--
3D images and anims, include files, tutorials and more:
rune|vision: http://runevision.com
POV-Ray Ring: http://webring.povray.co.uk
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> Hmm. Maybe having the object rotated 180 degrees around a changing axis that
> you get from the vturbulence() function? Even though the 180 degrees don't
> change over time, it will look like the object is rotating randomly, I
> think.
Hmm... vturbulence? Sounds interesting... I'll go look that up.
Andrew.
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Hmm, yes, that appears to do what I need. I can just feed it with a
point that varies (linearly) over time, and the axis of rotation will
vary. And because it's a turbulence function, it will vary smoothly.
Nice job!
(Only problem is... hope the vector doesn't ever come out as zero... :-/)
Andrew.
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WOOOOW!
TRIPPIFY YOUR MIND BABY! :-D
Simply add
rotate 180*vturbulence(2, 0.5, 1, frame_number/100)
to any object for a tripposcopic experience. :-)
(I have a camera inside a hollow checkered cube, rotating to the power
of vturbulence. It's... um... fantastic. In fact, I might post it in
it's own right. [Was to be a kind of "environment map" to pick up the
reflectiveness of some objects - but it kinda kills the render time.])
w00t!
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See povray.binaries.animations ;-)
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