assimp/code/ImproveCacheLocality.h

/*
Open Asset Import Library (ASSIMP)
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Copyright (c) 2006-2008, ASSIMP Development Team
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*/

/** @file Defines a post processing step to reorder faces for 
 better cache locality*/
#ifndef AI_IMPROVECACHELOCALITY_H_INC
#define AI_IMPROVECACHELOCALITY_H_INC

#include "BaseProcess.h"
#include "../include/aiTypes.h"

struct aiMesh;

namespace Assimp
{

// ---------------------------------------------------------------------------
/** The ImproveCacheLocalityProcess reorders all faces for improved vertex
 *  cache locality. It tries to arrange all faces to fans and to render
 *  faces which share vertices directly one after the other.
 *
 *  @note This step expects triagulated input data.
 */
class ASSIMP_API ImproveCacheLocalityProcess : public BaseProcess
{
	friend class Importer;

protected:
	/** Constructor to be privately used by Importer */
	ImproveCacheLocalityProcess();

	/** Destructor, private as well */
	~ImproveCacheLocalityProcess();

public:
	// -------------------------------------------------------------------
	/** Returns whether the processing step is present in the given flag field.
	 * @param pFlags The processing flags the importer was called with. A bitwise
	 *   combination of #aiPostProcessSteps.
	 * @return true if the process is present in this flag fields, false if not.
	*/
	bool IsActive( unsigned int pFlags) const;

	// -------------------------------------------------------------------
	/** Executes the post processing step on the given imported data.
	* At the moment a process is not supposed to fail.
	* @param pScene The imported data to work at.
	*/
	void Execute( aiScene* pScene);

protected:
	// -------------------------------------------------------------------
	/** Executes the postprocessing step on the given mesh
	 * @param pMesh The mesh to process.
	 * @param meshNum Index of the mesh to process
	 */
	void ProcessMesh( aiMesh* pMesh, unsigned int meshNum);


	//! Configuration parameter: specifies the size of the cache to
	//! optimize the vertex data for.
	unsigned int configCacheDepth;
};

} // end of namespace Assimp

#endif // AI_IMPROVECACHELOCALITY_H_INC