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diff --git a/src/mesh/assimp-master/code/PostProcessing/FindDegenerates.h b/src/mesh/assimp-master/code/PostProcessing/FindDegenerates.h
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+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file Defines a post processing step to search all meshes for
+  degenerated faces */
+#ifndef AI_FINDDEGENERATESPROCESS_H_INC
+#define AI_FINDDEGENERATESPROCESS_H_INC
+
+#include "Common/BaseProcess.h"
+
+#include <assimp/mesh.h>
+
+class FindDegeneratesProcessTest;
+namespace Assimp    {
+
+
+// ---------------------------------------------------------------------------
+/** FindDegeneratesProcess: Searches a mesh for degenerated triangles.
+*/
+class ASSIMP_API FindDegeneratesProcess : public BaseProcess {
+public:
+    FindDegeneratesProcess();
+    ~FindDegeneratesProcess();
+
+    // -------------------------------------------------------------------
+    // Check whether step is active
+    bool IsActive( unsigned int pFlags) const;
+
+    // -------------------------------------------------------------------
+    // Execute step on a given scene
+    void Execute( aiScene* pScene);
+
+    // -------------------------------------------------------------------
+    // Setup import settings
+    void SetupProperties(const Importer* pImp);
+
+    // -------------------------------------------------------------------
+    // Execute step on a given mesh
+    ///@returns true if the current mesh should be deleted, false otherwise
+    bool ExecuteOnMesh( aiMesh* mesh);
+
+    // -------------------------------------------------------------------
+    /// @brief Enable the instant removal of degenerated primitives
+    /// @param enabled  true for enabled.
+    void EnableInstantRemoval(bool enabled);
+
+    // -------------------------------------------------------------------
+    /// @brief Check whether instant removal is currently enabled
+    /// @return The instant removal state.
+    bool IsInstantRemoval() const;
+
+    // -------------------------------------------------------------------
+    /// @brief Enable the area check for triangles.
+    /// @param enabled  true for enabled.
+    void EnableAreaCheck( bool enabled );
+
+    // -------------------------------------------------------------------
+    /// @brief Check whether the area check is enabled.
+    /// @return The area check state.
+    bool isAreaCheckEnabled() const;
+
+private:
+    //! Configuration option: remove degenerates faces immediately
+    bool mConfigRemoveDegenerates;
+    //! Configuration option: check for area
+    bool mConfigCheckAreaOfTriangle;
+};
+
+inline
+void FindDegeneratesProcess::EnableInstantRemoval(bool enabled) {
+    mConfigRemoveDegenerates = enabled;
+}
+
+inline
+bool FindDegeneratesProcess::IsInstantRemoval() const {
+    return mConfigRemoveDegenerates;
+}
+
+inline
+void FindDegeneratesProcess::EnableAreaCheck( bool enabled ) {
+    mConfigCheckAreaOfTriangle = enabled;
+}
+
+inline
+bool FindDegeneratesProcess::isAreaCheckEnabled() const {
+    return mConfigCheckAreaOfTriangle;
+}
+
+} // Namespace Assimp
+
+#endif // !! AI_FINDDEGENERATESPROCESS_H_INC