text: /**
   * @license MIT
   * @author Baptiste Crespy <baptiste.crespy@gmail.com>
   * 
   * 
   **/
  
  import Surface3D from "./surface-3D";
  
  
  class SurfaceBump extends Surface3D {
    getZ (x, y, t) {
      return 0.05*Math.sin(5*x)*Math.cos(5*y);
    }
  };
  
  export default SurfaceBump;