private void DrawHierarchy(List<ObjectNode> nodes, int materialIndex, SharpDX.Direct3D11.DeviceContext devContext, int depth)
 {
     if (depth > 1212)
     {
         return;
     }
     foreach (ObjectNode node in nodes)
     {
         if (node.DrawGroup != null && node.Enabled)
         {
             foreach (Group group in node.DrawGroup)
             {
                 if (group.materialIndex == materialIndex)
                 {
                     devContext.DrawIndexed(group.indexCount, group.startIndex, 0);
                 }
             }
         }
         DrawHierarchy(node.Children, materialIndex, devContext, depth + 1);
     }
 }