function decay(time, coefficient) {
  if (time < 0) {
    return 0.0;
  }

  const tau = (1.0 - coefficient) * 25.0;
  return Math.exp(-tau * time);
}
The angle, relative to the ellipsoid normal, restricting the maximum amount that the user can tilt the camera. If <code>undefined</code>, the angle of the camera tilt is unrestricted.
@type {number|undefined}
@default undefined

@example
// Prevent the camera from tilting below the ellipsoid surface
viewer.scene.screenSpaceCameraController.maximumTiltAngle = Math.PI / 2.0;