Utility | 
The UtilityPlugin type exposes the following members.
| Name | Description | |
|---|---|---|
| BeginModify | 
            对模型场景开始一次修改
             (Inherited from PluginBase)  | |
| EndModify | 
            对模型场景结束一次修改
             (Inherited from PluginBase)  | |
| IsDefaultValue(Double) | 
            检查浮点参数是否为默认值
             (Inherited from PluginBase)  | |
| IsDefaultValue(Int32) | 
            检查32位整数参数是否为默认值
             (Inherited from PluginBase)  | |
| IsDefaultValue(Int64) | 
            检查64位长整数参数是否为默认值
             (Inherited from PluginBase)  | |
| IsDefaultValue(String) | 
            检查字符串是否为默认值
             (Inherited from PluginBase)  | |
| OnDocumentClosed | 模型关闭行为 | |
| OnDocumentOpened | 模型打开行为 | |
| OnPluginDisposed | 插件销毁行为 | |
| OnPluginLoaded | 插件加载行为 | |
| Run | 运行函数 |