| terrain | 活动地形对象。 |
| editContext | 用于在编辑器和绘制工具之间进行通信的接口。 |
bool 返回 true 以暂时隐藏地形上的树木、草地和细节层。
自定义地形工具绘制回调。
当鼠标按钮被按下或拖动时，Unity 会调用此方法，这通常是工具应用其修改时。某些工具可能希望在 OnSceneGUI 中的自定义绘制逻辑中应用其修改。当方法返回 true 时，地形顶部的层（例如树木、草地和其他细节）不会渲染。
其他资源: PaintContext
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