ctor(duration, toneCurveAmountFrom, toneCurveAmountTo) {
    cc.ActionInterval.prototype.ctor.call(this);
    this.initWithDuration(duration, toneCurveAmountFrom, toneCurveAmountTo);
  }
Animates the screen space tonal curve.
NOTE: only run this action on the scene, as it affects global state and the scene is the only guaranteed persistent node.
@function
@param {Number} duration
@param {Number} toneCurveAmountFrom
@param {Number} toneCurveAmountTo
@return {ToneCurve}