LOD_QSDecimator.h

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef NAN_INCLUDED_LOD_QSDecimator_H
#define NAN_INCLUDED_LOD_QSDecimator_H

#include "MEM_NonCopyable.h"
#include "LOD_ManMesh2.h"
#include "LOD_ExternNormalEditor.h"
#include "LOD_EdgeCollapser.h"
#include "LOD_QuadricEditor.h"

class LOD_ExternBufferEditor;

class LOD_QSDecimator : public MEM_NonCopyable {

public :

    static
        LOD_QSDecimator *
    New(
        LOD_ManMesh2 &mesh,
        LOD_ExternNormalEditor &face_editor,
        LOD_ExternBufferEditor &extern_editor
    );


        bool
    Arm(
    );


        bool
    Step(
    );

private :

    LOD_QSDecimator(
        LOD_ManMesh2 &mesh,
        LOD_ExternNormalEditor &face_editor,
        LOD_ExternBufferEditor &extern_editor
    );

        bool
    CollapseEdge(
    );

        bool
    BuildHeap(
    );

        void
    UpdateHeap(
        std::vector<LOD_EdgeInd> &deg_edges,
        std::vector<LOD_EdgeInd> &new_edges
    );  

        void
    DeletePrimitives(
        const std::vector<LOD_EdgeInd> & degenerate_edges,
        const std::vector<LOD_FaceInd> & degenerate_faces,
        const std::vector<LOD_VertexInd> & degenerate_vertices
    );


private :   

    // owned by this class

    MEM_SmartPtr<LOD_EdgeCollapser> m_collapser;
    MEM_SmartPtr<CTR_UHeap<LOD_Edge> > m_heap;
    MEM_SmartPtr<LOD_QuadricEditor> m_quadric_editor;

    bool m_is_armed;

    // arguments to New(...)

    LOD_ManMesh2 & m_mesh;
    LOD_ExternNormalEditor &m_face_editor;
    LOD_ExternBufferEditor & m_extern_editor;   

    // temporary buffers

    std::vector<LOD_FaceInd> m_deg_faces;
    std::vector<LOD_EdgeInd> m_deg_edges;
    std::vector<LOD_VertexInd> m_deg_vertices;

    std::vector<LOD_FaceInd> m_update_faces;
    std::vector<LOD_EdgeInd> m_new_edges;
    std::vector<LOD_VertexInd> m_update_vertices;


};

#endif