code: function () {
              var radius = Math.min(Math.sqrt(Math.pow(this.containerRect.width, 2) + Math.pow(this.containerRect.height, 2)), PaperWave.MAX_RADIUS) * 1.1 + 5;
              var elapsed = 1.1 - 0.2 * (radius / PaperWave.MAX_RADIUS);
              var currentTime = this.mouseInteractionSeconds / elapsed;
              var actualRadius = radius * (1 - Math.pow(80, -currentTime));
              return Math.abs(actualRadius);
          }
docs: Gets the wave's radius at the current time.
  
  @returns {Number} The value of the wave's radius.