Create a SimpleMod2 Modifier in C#

[Anonymous]

I have some issues when I try to create a modifier plugin using SimpleMod2 parent class. 

Here's  the code : 

using Autodesk.Max;
using Autodesk.Max.Plugins;

public class MyPlugin : SimpleMod2
{
    public override int NumRefs {get { return 0; }} // i dont have any pblock...

    public override RefResult NotifyRefChanged(IInterval changeInt, IReferenceTarget hTarget, ref UIntPtr partID, RefMessage message, bool propagate) 
    { 
      return RefResult.Dontcare; 
    }

    public override int Display(int t, IINode inode, IViewExp vpt, int flags, IModContext mc) 
    {
      drawGizmos(t, inode, vpt, flags, mc); // custom method
      return 0; 
    }

    public override IDeformer GetDeformer(int t, IModContext mc, IMatrix3 mat, IMatrix3 invmat) 
    { 
      return null; /* causes crash of 3dsmax*/ 
    }
}

public class MyPluginClassDesc : ClassDesc2
{
   [...]
}

public class Loader
    {
        public static void AssemblyMain()
        {
            GlobalInterface.Instance.COREInterface16.AddClass(new MyPluginClassDesc());
        }
    }

The problem comes from the IDeformer, i can't see any way to create my own one. Is there any way to avoid its creation ? I only need a modifier to display custom gizmos.

Thank you.

[kevinvandecar]

Hi,

Unfortunately, the Autodesk.Max.dll is not formed well in terms of virtual calls in derived classes, and you are likely running into a problem with this. We suggest not deriving new plugins from the Autodesk.Max.Plugins namespace. You can see this documented here with the Autodesk.Max.dll assembly description: http://help.autodesk.com/view/3DSMAX/2018/ENU/?guid=__developer_3ds_max__net_sdk_3ds_max__net_assemb...

I would suggest to consider using C++ for any full-on plugin development.

sorry for bad news, but hope it helps.

kevin

[Anonymous]

---

I would suggest to consider using C++ for any full-on plugin development.

sorry for bad news, but hope it helps.

kevin

---

I think the world would be a slightly better place, if you would add this statement on the top of your .net documentation (and flag the documentation as deprecated, while you're on it).