code: function translateX(progress) {
    var to = (this.options.to !== undefined) ? this.options.to : 0;
    var from = (this.options.from !== undefined) ? this.options.from : 0;
    var offset = (to - from) * progress + from;
  
    this.transforms.position[0] = offset;
  }
docs: Translate an element along the X-axis.
  @param {Float} progress  Current progress data of the scene, between 0 and 1.
  @this {Object}
  @return {void}