text: AFRAME.registerComponent('desplazable',{
      init: function(){
          const _this = this;  
          this.listener_grab_start = function(){
              this.setAttribute("ammo-body","type","kinematic");
          };
          this.listener_grab_end = function(){
              this.setAttribute("ammo-body","type","dynamic");
          };
          this.el.addEventListener("grab-start", this.listener_grab_start);
          this.el.addEventListener("grab-end", this.listener_grab_end);
      },
      remove: function(){
          this.el.removeEventListener("grab-start",this.listener_grab_start);
          this.el.removeEventListener("grab-end",this.listener_grab_end);
      }
  });