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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 OptimizeGraph.h
+ * @brief Declares a post processing step to optimize the scenegraph
+ */
+#ifndef AI_OPTIMIZEGRAPHPROCESS_H_INC
+#define AI_OPTIMIZEGRAPHPROCESS_H_INC
+
+#include "Common/BaseProcess.h"
+#include "PostProcessing/ProcessHelper.h"
+
+#include <assimp/types.h>
+
+#include <set>
+
+// Forward declarations
+struct aiMesh;
+
+class OptimizeGraphProcessTest;
+
+namespace Assimp {
+
+// -----------------------------------------------------------------------------
+/** @brief Postprocessing step to optimize the scenegraph
+ *
+ * The implementation tries to merge nodes, even if they use different
+ * transformations. Animations are preserved.
+ *
+ * @see aiProcess_OptimizeGraph for a detailed description of the
+ * algorithm being applied.
+ */
+class OptimizeGraphProcess : public BaseProcess {
+public:
+ OptimizeGraphProcess();
+ ~OptimizeGraphProcess();
+
+ // -------------------------------------------------------------------
+ bool IsActive( unsigned int pFlags) const override;
+
+ // -------------------------------------------------------------------
+ void Execute( aiScene* pScene) override;
+
+ // -------------------------------------------------------------------
+ void SetupProperties(const Importer* pImp) override;
+
+ // -------------------------------------------------------------------
+ /** @brief Add a list of node names to be locked and not modified.
+ * @param in List of nodes. See #AI_CONFIG_PP_OG_EXCLUDE_LIST for
+ * format explanations.
+ */
+ inline void AddLockedNodeList(std::string& in) {
+ ConvertListToStrings (in,locked_nodes);
+ }
+
+ // -------------------------------------------------------------------
+ /** @brief Add another node to be locked and not modified.
+ * @param name Name to be locked
+ */
+ inline void AddLockedNode(std::string& name) {
+ locked_nodes.push_back(name);
+ }
+
+ // -------------------------------------------------------------------
+ /** @brief Remove a node from the list of locked nodes.
+ * @param name Name to be unlocked
+ */
+ inline void RemoveLockedNode(std::string& name) {
+ locked_nodes.remove(name);
+ }
+
+protected:
+ void CollectNewChildren(aiNode* nd, std::list<aiNode*>& nodes);
+ void FindInstancedMeshes (aiNode* pNode);
+
+private:
+#ifdef AI_OG_USE_HASHING
+ typedef std::set<unsigned int> LockedSetType;
+#else
+ typedef std::set<std::string> LockedSetType;
+#endif
+
+ //! Scene we're working with
+ aiScene* mScene;
+
+ //! List of locked names. Stored is the hash of the name
+ LockedSetType locked;
+
+ //! List of nodes to be locked in addition to those with animations, lights or cameras assigned.
+ std::list<std::string> locked_nodes;
+
+ //! Node counters for logging purposes
+ unsigned int nodes_in,nodes_out, count_merged;
+
+ //! Reference counters for meshes
+ std::vector<unsigned int> meshes;
+};
+
+} // end of namespace Assimp
+
+#endif // AI_OPTIMIZEGRAPHPROCESS_H_INC