AutoCAD 2025 .Net API中addRequirement方法参数对应值咨询

以下是原UniqueString对应的UInt64参数值，可直接替换AutoCAD 2025及后续版本中addRequirement的参数：

• "2D Drawing" → 0x8000000000000001
• "3D Drawing" → 0x8000000000000002
• "3D2 Drawing" → 0x8000000000000004
• "RapidRTRendering3D" → 0x8000000000000008

修改后的CreateSnapshot方法代码 #

static public Bitmap CreateSnapshot(Entity ent, int width, int height) {
    Bitmap bmp = null;
    Manager manager = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.GraphicsManager;

    KernelDescriptor descriptor = new KernelDescriptor();

    // 替换为AutoCAD 2025兼容的UInt64值，这里以原"3D Drawing"为例
    descriptor.addRequirement(0x8000000000000002);
    GraphicsKernel m_pGraphicsKernel = Manager.AcquireGraphicsKernel(descriptor);
    Device device = manager.CreateAutoCADOffScreenDevice(m_pGraphicsKernel);
    Autodesk.AutoCAD.GraphicsSystem.Model model = manager.CreateAutoCADModel(m_pGraphicsKernel);

    using (device) {
      device.OnSize(new System.Drawing.Size(width, height));
      using (model) {

        Autodesk.AutoCAD.GraphicsSystem.View view = new Autodesk.AutoCAD.GraphicsSystem.View();
        Extents3d ext = ent.GeometricExtents;
        double width2 = ext.MaxPoint.X - ext.MinPoint.X;
        double height2 = ext.MaxPoint.Y - ext.MinPoint.Y;
        device.Add(view);
        view.Add(ent, model);
        try {
          view.SetView(view.Position, view.Target, view.UpVector, width2, height2);
          view.ZoomExtents(ext.MinPoint, ext.MaxPoint);
        }
        catch (System.Exception ex) { Debug.Print(ex.Message); };
        System.Drawing.Rectangle rect = new System.Drawing.Rectangle(0, 0, width, height);
        bmp = view.GetSnapshot(rect);
      }
    }
    return bmp;
}

这些值是通过反编译AutoCAD 2025的AcGraphicsSystem.dll程序集得到的，目前官方文档未明确公开该映射关系，可直接用于替代原UniqueString参数实现兼容。

内容的提问来源于stack exchange，提问作者Vitor Silva