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diff --git a/extern/draco/draco/src/draco/mesh/mesh_cleanup.h b/extern/draco/draco/src/draco/mesh/mesh_cleanup.h
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+// Copyright 2016 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#ifndef DRACO_MESH_MESH_CLEANUP_H_
+#define DRACO_MESH_MESH_CLEANUP_H_
+
+#include "draco/mesh/mesh.h"
+
+namespace draco {
+
+// Options used by the MeshCleanup class.
+struct MeshCleanupOptions {
+  MeshCleanupOptions()
+      : remove_degenerated_faces(true), remove_unused_attributes(true) {}
+  // If true, the cleanup tool removes any face where two or more vertices
+  // share the same position index.
+  bool remove_degenerated_faces;
+  // If true, the cleanup tool removes any unused attribute value or unused
+  // point id. For example, it can be used to remove isolated vertices.
+  bool remove_unused_attributes;
+};
+
+// Tool that can be used for removing bad or unused data from draco::Meshes.
+class MeshCleanup {
+ public:
+  // Performs in-place cleanup of the input mesh according to the input options.
+  bool operator()(Mesh *mesh, const MeshCleanupOptions &options);
+};
+
+}  // namespace draco
+
+#endif  // DRACO_MESH_MESH_CLEANUP_H_