text: /**
   * Burner  酒精灯
   * @param position
   * @param callback
   * @constructor
   */
  Chemist.Burner = function (position, callback) {
       var burner = null, scale = 0.008;
       
      Chemist.objLoader.load("obj/burner.obj", function (objects) {
          burner = objects.children[0];
  
          burner.material.transparent = true;
          burner.material.opacity = 0.3;
          burner.material.refractionRatio = 0.85;
          burner.position.copy(position);
          burner.scale.set(scale, scale, scale);
          burner.castShadow = true;
  
          Chemist.Base.call(burner, {
              type: Chemist.type.instrument,
              canFire: true,
              scale: scale,
              direct: new THREE.Vector3(0, 1, 0),
              detail: Chemist.Equips.burner
          });
  
          Chemist.scene.add(burner);
          Chemist.objects.push(burner);
  
          callback && callback(burner);
      });
  };
  
  