Moin,
my English isn't the best, so I hope you can understand me...

I want to create an animation, where the number of points in sphere_sweep is
the same as the frame_number. For example POV-Ray is rendering frame number
5, the sphere_sweep also have 5 points and when he's rendering frame number
6, the same sphere_sweep as before have also 6 points.

The only idea I had, was to use many if-comments, but that's of course not
very good:

sphere_sweep {
  linear_spline
  frame_number+1,
  first_point,R,
  first_point,R
  #if (frame_number = 2) ,second_point,R #end
  #if (frame_number = 3) ,third_point,R #end
  #if (frame_number = 4) ,forth_point,R #end
  etc...
}

Is there a easier way, to make that, maybe with an array or something other?
Please help me...

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