/*

Open Asset Import Library (assimp)

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  following disclaimer.

* Redistributions in binary form must reproduce the above

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*/

/** @file Defines a post processing step to join identical vertices

    on all imported meshes.*/

#ifndef AI_JOINVERTICESPROCESS_H_INC

#define AI_JOINVERTICESPROCESS_H_INC

#include "Common/BaseProcess.h"

#include <assimp/types.h>

struct aiMesh;

namespace Assimp {

// ---------------------------------------------------------------------------

/** The JoinVerticesProcess unites identical vertices in all imported meshes.

 * By default the importer returns meshes where each face addressed its own

 * set of vertices even if that means that identical vertices are stored multiple

 * times. The JoinVerticesProcess finds these identical vertices and

 * erases all but one of the copies. This usually reduces the number of vertices

 * in a mesh by a serious amount and is the standard form to render a mesh.

 */

class ASSIMP_API JoinVerticesProcess : public BaseProcess {

public:

    // -------------------------------------------------------------------

    /// The default class constructor / destructor.

    JoinVerticesProcess() = default;

    ~JoinVerticesProcess() override = default;

    // -------------------------------------------------------------------

    /** 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 override;

    // -------------------------------------------------------------------

    /** 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) override;

    // -------------------------------------------------------------------

    /** Unites identical vertices in the given mesh.

     * @param pMesh The mesh to process.

     * @param meshIndex Index of the mesh to process

     */

    int ProcessMesh( aiMesh* pMesh, unsigned int meshIndex);

};

} // end of namespace Assimp

#endif // AI_CALCTANGENTSPROCESS_H_INC