/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

Copyright (c) 2006-2022, assimp team


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  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
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* Neither the name of the assimp team, nor the names of its
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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
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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*/

/** @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 "Common/BaseProcess.h"
#include <assimp/mesh.h>

namespace Assimp
{

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

    GenFaceNormalsProcess();
    ~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:
    bool GenMeshFaceNormals(aiMesh* pcMesh);
    mutable bool force_ = false;
    mutable bool flippedWindingOrder_ = false;
};

} // end of namespace Assimp

#endif // !!AI_GENFACENORMALPROCESS_H_INC
