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Shark wrote:
> Hi, I was wondering if anyone could describe a method of generating the
> sinusoidal surface using isosurfaces. I've done it using the parametric
> object, but it takes too long to render and has too many artifacts.
>
> Thanks!
>
>
Have you seen this?
http://www.econym.demon.co.uk/isotut/param.htm
Skip
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Skip Talbot <Ski### [at] aol com> wrote:
> Shark wrote:
> > Hi, I was wondering if anyone could describe a method of generating the
> > sinusoidal surface using isosurfaces. I've done it using the parametric
> > object, but it takes too long to render and has too many artifacts.
> >
> > Thanks!
> >
> >
> Have you seen this?
> http://www.econym.demon.co.uk/isotut/param.htm
>
> Skip
No I hadn't seen this. Thank you!
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"Shark" <nomail@nomail> wrote:
> Hi, I was wondering if anyone could describe a method of generating the
> sinusoidal surface using isosurfaces. I've done it using the parametric
> object, but it takes too long to render and has too many artifacts.
>
> Thanks!
If I understand your question correctly, here's a very simple method for
imposing sine waves onto a flat isosurface plate or box...
isosurface{
function{
y // basic function for a plane surface
+ sin(2*pi*z)*.04
}
max_gradient 3 // or whatever
contained_by{box{<0,-.2,0>,<1,.2,1>}}
}
This produces sine waves along the z-axis--here, imposing one complete wave
cycle along a unit POV length. The .04 multiplier is the height or
amplitude of the waves. (Since POV's trig functions normally work with
radians, I use 2*pi to convert that to degrees, as there are 2*pi radians
in 360-degrees. Then, I can multiply that to get a more "logical" increase
in sine-wave frequency.) Like this:
+sin(15*2*pi*z)*.04
for 15 complete wave cycles along a unit length.
Ken W.
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