code: function (x, y, output, forcePickAll) {
          this.renderer.screenToNDC(x, y, this._ndc);
          this.camera.castRay(this._ndc, this._ray);
  
          output = output || [];
  
          this._intersectNode(this.scene, output, forcePickAll || false);
  
          output.sort(this._intersectionCompareFunc);
  
          return output;
      }
docs: Pick all intersection objects, wich will be sorted from near to far
  @param  {number} x Mouse position x
  @param  {number} y Mouse position y
  @param  {Array} [output]
  @param  {boolean} [forcePickAll=false] ignore ignorePicking
  @return {Array.<clay.picking.RayPicking~Intersection>}