/** @file Defines a post processing step to compute face normals for all loaded faces*/
#ifndef AI_GENFACENORMALPROCESS_H_INC
#define AI_GENFACENORMALPROCESS_H_INC

#include "BaseProcess.h"
#include "../include/aiMesh.h"

namespace Assimp
{

// ---------------------------------------------------------------------------
/** The GenFaceNormalsProcess computes face normals for all faces of all meshes
*/
class GenFaceNormalsProcess : public BaseProcess
{
	friend class Importer;

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

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

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);


private:
	void GenMeshFaceNormals (aiMesh* pcMesh);
};

} // end of namespace Assimp

#endif // !!AI_GENFACENORMALPROCESS_H_INC