Marc Schimmler wrote:
> 
> Ken wrote:
> >
> > Nieminen Mika wrote:
> > >
> > > Ken <tyl### [at] pacbellnet> wrote:
> > > : Could someone please provide me an example of how to create
> > > : a sine wave using a while loop to translate/rotate(?) a sphere.
> > >
> > >   Since I'm a programmer and a perfectionist, I will give you a more
> > > detailed answer than the one already given:
> > >
> > > //-----------------------------------------------------------------------
> > <snip>
> >
> > Thank you sir and thank you Mark as well for your example.
> >
> > Next question -
> >
> > Now that I have the shape established I would like to
> > rotate the face of the defining object to follow the
> > curve of the wave.
> >
> >  Say I had a box(-1,1 scale<1,0.1,10>}
> >
> > The flat face of the object is in the +y direction.
> > As it moves through the curve it needs to rotate
> > +/- 180*z to keep from having a stair stepped appearance.
> >
> > Again any help would be appreciated.
> >
> > --
> > Ken Tyler
> >
> > tyl### [at] pacbellnet
> 
> Hi Ken!
> -----
> camera {
>  rotate <0,180,0>
>  location <45,0,-80>
>  look_at  <45,0,0>
>  angle 60
> }
> 
> #declare i=0;
> 
> #while (i<90)
>  #declare angle1 = i*pi/30;
>  box {<-0.5,-0.5,-0.5>,<0.5,0.5,0.5>
>          pigment {rgb <1,0,0>}
>          finish {ambient 1.0}
>          rotate <0,0,45*sin(angle1)>
>                  translate <i,10*sin(angle1+pi/2),0>}
>  #declare i = i + 1;
> #end;
> 
> ----
> 
> The rotation follows the sine. I inserted a phase differenvce of pi/2 to
> have the sine starting in a horizontal position.
> 
> I hope it helps!
> 
> Marc
> --
> Marc Schimmler

Thank you very much. I will put it through it's paces
right now.

Now - how about a square wave ?
Just kidding :)

-- 
Ken Tyler

tyl### [at] pacbellnet

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