msh viewport initial

NResUI/Rendering/Viewport/ViewportPiece.cs

@@ -14,13 +14,16 @@ public sealed class ViewportPiece
     public Vector3 BoundsMin { get; }
     public Vector3 BoundsMax { get; }
 
+    public ViewportPieceDebugInfo? DebugInfo { get; }
+
     public ViewportPiece(
         int id,
         string name,
         GpuMesh mesh,
         Matrix4x4 localTransform,
         Vector3 boundsMin,
-        Vector3 boundsMax)
+        Vector3 boundsMax,
+        ViewportPieceDebugInfo? debugInfo = null)
     {
         Id = id;
         Name = name;
@@ -28,6 +31,7 @@ public sealed class ViewportPiece
         LocalTransform = localTransform;
         BoundsMin = boundsMin;
         BoundsMax = boundsMax;
+        DebugInfo = debugInfo;
     }
 
     public static ViewportPiece CreateUnitCube(int id, string name, GpuMesh mesh)
@@ -38,6 +42,16 @@ public sealed class ViewportPiece
             mesh,
             Matrix4x4.Identity,
             new Vector3(-1.0f, -1.0f, -1.0f),
-            new Vector3(1.0f, 1.0f, 1.0f));
+            new Vector3(1.0f, 1.0f, 1.0f),
+            new ViewportPieceDebugInfo
+            {
+                SourceKind = "Debug primitive",
+                SourcePieceIndex = id,
+                SourceParentIndex = -1,
+                GeometrySlotIndex = 0,
+                Msh01Flags = 0,
+                BatchCount = 1,
+                TriangleCount = 12
+            });
     }
 }