                   if (name === 'startScale') {
                            //起始规模
                            fireObj.startScale = parseFloat(newValue);
                        }
                        if (name === 'endScale') {
                            //终止规模
                            fireObj.endScale = parseFloat(newValue);
                        }
                    }
                );
                scene.requestRender();
            }
            //改变属性值时调用
  