Builder.h

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/***************************************************************************
 *   Copyright (c) 2005 Berthold Grupp                                     *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   This library  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 Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/

#ifndef MESH_BUILDER_H
#define MESH_BUILDER_H

#include <set>
#include <vector>

#include "MeshKernel.h"
#include <Base/Vector3D.h>

namespace Base {
class SequencerLauncher;
}

namespace MeshCore
{
class MeshKernel;
class MeshPoint;
class MeshGeomFacet;

class MeshExport MeshBuilder
{
private:
    class Edge
    {
        public:
        unsigned long   pt1, pt2, facetIdx;

        Edge (unsigned long p1, unsigned long p2, unsigned long idx)
        {
            facetIdx = idx;
            if (p1 > p2)
            {
                pt1 = p2;
                pt2 = p1;
            }
            else
            {
                pt1 = p1;
                pt2 = p2;
            }
        }

        bool operator < (const Edge &e) const
        {
            return (pt1 == e.pt1) ? (pt2 < e.pt2) : (pt1 < e.pt1);
        }

        bool operator > (const Edge &e) const
        {
            return (pt1 == e.pt1) ? (pt2 > e.pt2) : (pt1 > e.pt1);
        }

        bool operator == (const Edge &e) const
        {
            return (pt1 == e.pt1) && (pt2 == e.pt2);
        }
    };

    MeshKernel& _meshKernel;
    std::set<MeshPoint> _points;
    Base::SequencerLauncher* _seq;

    // keep an array of iterators pointing to the vertex inside the set to save memory
    typedef std::pair<std::set<MeshPoint>::iterator, bool> MeshPointIterator;
    std::vector<MeshPointIterator> _pointsIterator;
    unsigned long                               _ptIdx; 

    void SetNeighbourhood  ();
    // As it's forbidden to insert a degenerated facet but insert its vertices anyway we must remove them 
    void RemoveUnreferencedPoints();

public:
    MeshBuilder(MeshKernel &rclM);
    ~MeshBuilder(void);

    void SetTolerance(float);

    void Initialize (unsigned long ctFacets, bool deletion = true);

    void AddFacet (const MeshGeomFacet& facet, bool takeFlag = false, bool takeProperty = false);
    void AddFacet (const Base::Vector3f& pt1, const Base::Vector3f& pt2, const Base::Vector3f& pt3, const Base::Vector3f& normal, unsigned char flag = 0, unsigned long prop = 0);
    void AddFacet (Base::Vector3f* facetPoints, unsigned char flag = 0, unsigned long prop = 0);

    void Finish (bool freeMemory=false);

    friend class MeshKernel;

private:
    float _fSaveTolerance;
};

} // namespace MeshCore

#endif