kicad/pcbnew/router/pns_diff_pair_placer.h

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/*
* KiRouter - a push-and-(sometimes-)shove PCB router
*
* Copyright (C) 2013-2014 CERN
* Copyright (C) 2016-2023 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_DIFF_PLACER_H
#define __PNS_DIFF_PLACER_H
#include <math/vector2d.h>
#include "pns_sizes_settings.h"
#include "pns_node.h"
#include "pns_via.h"
#include "pns_line.h"
#include "pns_algo_base.h"
#include "pns_diff_pair.h"
#include "pns_placement_algo.h"
namespace PNS {
class ROUTER;
class SHOVE;
class OPTIMIZER;
class VIA;
class SIZES_SETTINGS;
/**
* Single track placement algorithm.
*
* Interactively routes a track and applies shove and walk around algorithms when needed.
*/
class DIFF_PAIR_PLACER : public PLACEMENT_ALGO
{
public:
DIFF_PAIR_PLACER( ROUTER* aRouter );
~DIFF_PAIR_PLACER();
static bool FindDpPrimitivePair( NODE* aWorld, const VECTOR2I& aP, ITEM* aItem,
DP_PRIMITIVE_PAIR& aPair, wxString* aErrorMsg = nullptr );
/**
* Start routing a single track at point aP, taking item aStartItem as anchor (unless NULL).
*/
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bool Start( const VECTOR2I& aP, ITEM* aStartItem ) override;
/**
* Move the end of the currently routed trace to the point \a aP, taking \a aEndItem as
* anchor (if not NULL).
*/
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bool Move( const VECTOR2I& aP, ITEM* aEndItem ) override;
/**
* Commit the currently routed track to the parent node, taking \a aP as the final end
* point and \a aEndItem as the final anchor (if provided).
*
* @return true if route has been committed. May return false if the routing result is
* violating design rules. In such cases, the track is only committed if
* #Settings.CanViolateDRC() is on.
*/
bool FixRoute( const VECTOR2I& aP, ITEM* aEndItem, bool aForceFinish ) override;
/// @copydoc PLACEMENT_ALGO::CommitPlacement()
bool CommitPlacement() override;
/// @copydoc PLACEMENT_ALGO::AbortPlacement()
bool AbortPlacement() override;
/// @copydoc PLACEMENT_ALGO::HasPlacedAnything()
bool HasPlacedAnything() const override;
/**
* Enable/disable a via at the end of currently routed trace.
*/
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bool ToggleVia( bool aEnabled ) override;
/**
* Set the current routing layer.
*/
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bool SetLayer( int aLayer ) override;
/**
* Return the complete routed line, as a single-member ITEM_SET.
*/
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const ITEM_SET Traces() override;
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/**
* Return the current start of the line being placed.
*/
const VECTOR2I& CurrentStart() const override
{
return m_currentStart;
}
/**
* Return the current end of the line being placed. It may not be equal to the cursor
* position due to collisions.
*/
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const VECTOR2I& CurrentEnd() const override
{
return m_currentEnd;
}
/**
* Return the net of currently routed track.
*/
const std::vector<NET_HANDLE> CurrentNets() const override;
/**
* Return the layer of currently routed track.
*/
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int CurrentLayer() const override
{
return m_currentLayer;
}
/**
* Return the most recent world state.
*/
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NODE* CurrentNode( bool aLoopsRemoved = false ) const override;
/**
* Toggle the current posture (straight/diagonal) of the trace head.
*/
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void FlipPosture() override;
/**
* Perform on-the-fly update of the width, via diameter & drill size from a settings class.
*
* Used to dynamically change these parameters as the track is routed.
*/
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void UpdateSizes( const SIZES_SETTINGS& aSizes ) override;
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bool IsPlacingVia() const override { return m_placingVia; }
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void SetOrthoMode( bool aOrthoMode ) override;
void GetModifiedNets( std::vector<NET_HANDLE>& aNets ) const override;
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private:
int viaGap() const;
int gap() const;
/**
* Re-route the current track to point \a aP.
*
* Returns true, when routing has completed successfully (i.e. the trace end has reached
* point aP), and false if the trace was stuck somewhere on the way. May call routeStep()
* repetitively due to mouse smoothing.
*
* @param aP is the ending point of current route.
* @return true if the routing is complete.
*/
bool route( const VECTOR2I& aP );
/**
* Draw the "leading" ratsnest line, which connects the end of currently routed track and
* the nearest yet unrouted item. If the routing for current net is complete, draws nothing.
*/
void updateLeadingRatLine();
/**
* Set the board to route.
*/
void setWorld( NODE* aWorld );
/**
* Initialize placement of a new line with given parameters.
*/
void initPlacement( );
/**
* Set preferred direction of the very first track segment to be laid.
*
* Used by posture switching mechanism.
*/
void setInitialDirection( const DIRECTION_45& aDirection );
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bool routeHead( const VECTOR2I& aP );
bool tryWalkDp( NODE* aNode, DIFF_PAIR& aPair, bool aSolidsOnly );
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///< route step, walk around mode
bool rhWalkOnly( const VECTOR2I& aP );
///< route step, shove mode
bool rhShoveOnly ( const VECTOR2I& aP );
///< route step, mark obstacles mode
bool rhMarkObstacles( const VECTOR2I& aP );
const VIA makeVia ( const VECTOR2I& aP, NET_HANDLE aNet );
bool attemptWalk( NODE* aNode, DIFF_PAIR* aCurrent, DIFF_PAIR& aWalk, bool aPFirst,
bool aWindCw, bool aSolidsOnly );
bool propagateDpHeadForces ( const VECTOR2I& aP, VECTOR2I& aNewP );
enum State {
RT_START = 0,
RT_ROUTE = 1,
RT_FINISH = 2
};
State m_state;
bool m_chainedPlacement;
bool m_initialDiagonal;
bool m_startDiagonal;
bool m_fitOk;
NET_HANDLE m_netP, m_netN;
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DP_PRIMITIVE_PAIR m_start;
std::optional<DP_PRIMITIVE_PAIR> m_prevPair;
///< current algorithm iteration
int m_iteration;
///< pointer to world to search colliding items
NODE* m_world;
///< current routing start point (end of tail, beginning of head)
VECTOR2I m_p_start;
///< The shove engine
std::unique_ptr<SHOVE> m_shove;
///< Current world state
NODE* m_currentNode;
///< Postprocessed world state (including marked collisions & removed loops)
NODE* m_lastNode;
SIZES_SETTINGS m_sizes;
///< Are we placing a via?
bool m_placingVia;
///< current via diameter
int m_viaDiameter;
///< current via drill
int m_viaDrill;
///< current track width
int m_currentWidth;
int m_currentLayer;
bool m_startsOnVia;
bool m_orthoMode;
bool m_snapOnTarget;
VECTOR2I m_currentEnd, m_currentStart;
DIFF_PAIR m_currentTrace;
bool m_currentTraceOk;
ITEM* m_currentEndItem;
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bool m_idle;
};
}
#endif // __PNS_LINE_PLACER_H