3ds Max .NET二次开发的基础入门篇

3ds Max .NET SDK由以下.NET程序集组成。

• Autodesk.Max.dll - Contains wrappers that expose most of the API elements from the 3ds Max C++ SDK to .NET constructs. Currently it is not recommended to derive from the Autodesk.Max.Plugins classes.
• AssemblyLoader.dll - Contains the Loader class.
• CSharpUtilities.dll - Various utility classes for .NET programming.
• ExplorerFramework.dll - Abstract explorer framework classes upon which the Scene Explorer is built. It can be used for creating a new node traversal for arbitrary scene explorers.
• ManagedServices.dll - Exposes some convenient 3ds Max SDK functionality to .NET.
• MaxCustomControls.dll - Various .NET utilities and UI components.
• SceneExplorer.dll - Specification of the ExplorerFramework components for the SceneExplorer with bindings to 3ds Max data.
• UiViewModels.dll - Contains classes for defining user actions and customizing the user interface.

以上摘自说明文档。

3ds Max从bin / assemblies文件夹中加载插件。

    public static class AssemblyEntry
    {
        /// <summary>
        /// 启动时候执行.
        /// </summary>
        /// <author>YangSen</author>
        public static void AssemblyMain()
        {
            try
            {
                {
                    // 在这里可以做一些UI，便于后续使用，我在Help的下拉中加了一个菜单项
                    RibbonMenuItem mi = new RibbonMenuItem();
                    mi.Id = "ID_MODIFY_NAME";
                    mi.IsVisible = true;
                    mi.Text = "Rename By IFD Code";
                    mi.Description = "Rename By IFD Code";
                    mi.ShowText = true;
                    // RenameCommand为绑定的命令，该命令继承了System.Windows.Input.ICommand接口
                    mi.CommandHandler = new RenameCommand();

                    ComponentManager.HelpButton.Items.Add(mi);
                }
            }
            catch (Exception ex)
            {
            }
        }

        /// <summary>
        /// 关闭时候执行.
        /// </summary>
        /// <author>YangSen</author>
        public static void AssemblyShutdown()
        {
             // do something...        
        }
    }

RenameCommand命令

    public class RenameCommand : System.Windows.Input.ICommand
    {
        public event EventHandler CanExecuteChanged;

        public bool CanExecute(object parameter)
        {
            return true;
        }

        public void Execute(object parameter)
        {
            // do something...
        }
    }

以上是初次研究的成果，对于脚本插件还没有深入研究。

在public void Execute(object parameter)中，我们可以做我们想做的事情，比如：

            var g = Autodesk.Max.GlobalInterface.Instance;
            var core = g.COREInterface14;

            IINode proj = core.RootNode;
            if (proj.NumChildren > 1)
            {
                // 添加组
                core.ClearNodeSelection(true); // 清除选择
                for (int i = 0; i < proj.NumChildren; i++)
                {
                    var nd = proj.GetChildNode(i); // 获取子节点
                    core.SelectNode(nd, false); // 添加选择，false表示不清除之前的选择
                }
                // 解释一下GroupNodes这个方法
                // 第一个参数为空，默认为当前选择的节点
                // 第二个参数为空，默认会弹出一个编辑对话框
                // 第三个参数为false，标识不选中分组
                IINode groupNode = core.GroupNodes(null, IntPtr.Zero, false);        
             }

初学，分享给大家。