pns_line_placer.h

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/*
 * KiRouter - a push-and-(sometimes-)shove PCB router
 *
 * Copyright (C) 2013-2017 CERN
 * Copyright (C) 2016 KiCad Developers, see AUTHORS.txt for contributors.
 * Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef __PNS_LINE_PLACER_H
#define __PNS_LINE_PLACER_H

#include <math/vector2d.h>

#include <geometry/shape.h>
#include <geometry/shape_line_chain.h>

#include "pns_sizes_settings.h"
#include "pns_node.h"
#include "pns_via.h"
#include "pns_line.h"
#include "pns_placement_algo.h"

namespace PNS {

class ROUTER;
class SHOVE;
class OPTIMIZER;
class VIA;
class SIZES_SETTINGS;


class LINE_PLACER : public PLACEMENT_ALGO
{
public:
    LINE_PLACER( ROUTER* aRouter );
    ~LINE_PLACER();

    bool Start( const VECTOR2I& aP, ITEM* aStartItem ) override;

    bool Move( const VECTOR2I& aP, ITEM* aEndItem ) override;

    bool FixRoute( const VECTOR2I& aP, ITEM* aEndItem ) override;

    bool ToggleVia( bool aEnabled ) override;

    bool SetLayer( int aLayer ) override;

    const LINE& Head() const { return m_head; }

    const LINE& Tail() const { return m_tail; }

    const LINE Trace() const;

    const ITEM_SET Traces() override;

    const VECTOR2I& CurrentEnd() const override
    {
        return m_currentEnd;
    }

    const std::vector<int> CurrentNets() const override
    {
        return std::vector<int>( 1, m_currentNet );
    }

    int CurrentLayer() const override
    {
        return m_currentLayer;
    }

    NODE* CurrentNode( bool aLoopsRemoved = false ) const override;

    void FlipPosture() override;

    void UpdateSizes( const SIZES_SETTINGS& aSizes ) override;

    void SetOrthoMode( bool aOrthoMode ) override;

    bool IsPlacingVia() const override { return m_placingVia; }

    void GetModifiedNets( std::vector<int>& aNets ) const override;

    LOGGER* Logger() override;

    bool SplitAdjacentSegments( NODE* aNode, ITEM* aSeg, const VECTOR2I& aP );


private:
    bool route( const VECTOR2I& aP );

    void updateLeadingRatLine();

    void setWorld( NODE* aWorld );

    void initPlacement();

    void setInitialDirection( const DIRECTION_45& aDirection );

    void removeLoops( NODE* aNode, LINE& aLatest );

    void simplifyNewLine( NODE* aNode, SEGMENT* aLatest );

    bool checkObtusity( const SEG& aA, const SEG& aB ) const;

    bool handleSelfIntersections();

    bool handlePullback();

    bool mergeHead();

    bool reduceTail( const VECTOR2I& aEnd );

    bool optimizeTailHeadTransition();

    bool routeHead( const VECTOR2I& aP, LINE& aNewHead);

    void routeStep( const VECTOR2I& aP );

    const LINE reduceToNearestObstacle( const LINE& aOriginalLine );

    bool rhStopAtNearestObstacle( const VECTOR2I& aP, LINE& aNewHead );


    bool rhWalkOnly( const VECTOR2I& aP, LINE& aNewHead);

    bool rhShoveOnly( const VECTOR2I& aP, LINE& aNewHead);

    bool rhMarkObstacles( const VECTOR2I& aP, LINE& aNewHead );

    const VIA makeVia( const VECTOR2I& aP );

    bool buildInitialLine( const VECTOR2I& aP, LINE& aHead, bool aInvertPosture = false );

    DIRECTION_45 m_direction;

    DIRECTION_45 m_initial_direction;

    LINE m_head;

    LINE m_tail;

    NODE* m_world;

    VECTOR2I m_p_start;

    std::unique_ptr< SHOVE > m_shove;

    NODE* m_currentNode;

    NODE* m_lastNode;

    SIZES_SETTINGS m_sizes;

    bool m_placingVia;

    int m_currentNet;
    int m_currentLayer;

    VECTOR2I m_currentEnd, m_currentStart;
    LINE m_currentTrace;

    PNS_MODE m_currentMode;
    ITEM* m_startItem;

    bool m_idle;
    bool m_chainedPlacement;
    bool m_orthoMode;
};

}

#endif    // __PNS_LINE_PLACER_H