ecmascript:

//  this input function receives the currently interpolated rotation angle value,
//  and then computes the position and orientation of each of the cones.

function angle (value)
{
  positionRed       = new SFVec3f (Math.cos (value), 1.5 * Math.sin(value), 0.5);
  positionGreen     = new SFVec3f (Math.cos (value+2.094), 1.5 * Math.sin(value+2.094),    0);
  positionTurquoise = new SFVec3f (Math.cos (value+4.189), 1.5 * Math.sin(value+4.189), -0.5);

  // The values 2.094 and 4.189 are 1/3 and 2/3 of 2*pi radians.
  orientationRed       = new SFRotation (0, 0, 1, -2*value);
  orientationGreen     = new SFRotation (0, 0, 1, -2*(value+2.094));
  orientationTurquoise = new SFRotation (0, 0, 1, -2*(value+4.189));
}