rj-action-library/Runtime/Rendering/RenderingManager.cs

using System.Diagnostics;
using System.Collections;
using System.Collections.Generic;
using System;
using Godot;


namespace Rokojori
{  
  [Tool]
  [GlobalClass]
  public partial class RenderingManager:Node
  {   
    [Export]
    public RenderingManagerData data;

    public static int GetStencilReferenceIndex( StencilLayer stencilLayer )
    {
      if ( stencilLayer == null )
      {
        return -1;
      }

      var rm = Unique<RenderingManager>.Get();

      if ( rm == null )
      {
        return stencilLayer.fallBackIndex;
      }

      var rmIndex = rm.data.stencilLayers.IndexOf( stencilLayer );
      
      return rmIndex == -1 ? stencilLayer.fallBackIndex : ( rmIndex + 1 );
    }
  }
}