Hello POV-Ray Users!

So, i was rendering an animation of a metronome whose pendulum swings back and
forth between a specific angle and its negative.

Here's how I did it:

#declare maxangle = 35;
#declare actangle = maxangle * sin( clock * 4 ) * cos( clock * 4 );

polygon {
5,
<-.06,0>, <-.06,2.6>, <.06,2.6>, <.06,0>, <-.06,0>
         texture{ Chrome_Metal
                  // normal { bumps 0.5 scale 0.05 }
                  // finish { phong 1 }
                } // end of texture ---------------------------
    translate <0,0,0>
    rotate <0,0,clock*actangle>
    translate <0,.3,-.8>

   }
}
object { metronome
scale .5 }

This is not the complete scene, just the pendulum, which is a polygon that
rotates (maxangle value).

(I'm not an experienced user, and I don't know much about trigonometry and stuff
like that, srry.)

However, the pendulum doesn't swing back and forth constantly (as it should);
instead, it moves a very short distance at the beginning of the animation, and
as the animation progresses, the distance it travels increases until it exceeds
the angle that had been set (or so I think) as the maximum.

If anyone knows what's going on and how to fix it, I would really appreciate
it if you could share your knowledge with me.

Thanks!

(sorry if my english is bad, most of this post was translated)

- S I R ?

Post a reply to this message