assimp/code/OptimizeGraph.h

/*
Open Asset Import Library (assimp)
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*/

/** @file  OptimizeGraph.h
 *  @brief Declares a post processing step to optimize the scenegraph
 */
#ifndef AI_OPTIMIZEGRAPHPROCESS_H_INC
#define AI_OPTIMIZEGRAPHPROCESS_H_INC

#include "BaseProcess.h"
#include "ProcessHelper.h"
#include "../include/assimp/types.h"
#include <set>

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();

public:
	// -------------------------------------------------------------------
	bool IsActive( unsigned int pFlags) const;

	// -------------------------------------------------------------------
	void Execute( aiScene* pScene);
	
	// -------------------------------------------------------------------
	void SetupProperties(const Importer* pImp);


	// -------------------------------------------------------------------
	/** @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 Rmeove 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