465 lines
13 KiB
C++
465 lines
13 KiB
C++
/*
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* KiRouter - a push-and-(sometimes-)shove PCB router
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*
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* Copyright (C) 2013-2017 CERN
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* Copyright (C) 2016-2021 KiCad Developers, see AUTHORS.txt for contributors.
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* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __PNS_LINE_PLACER_H
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#define __PNS_LINE_PLACER_H
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#include <math/vector2d.h>
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#include <geometry/shape.h>
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#include <geometry/shape_line_chain.h>
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#include "pns_sizes_settings.h"
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#include "pns_node.h"
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#include "pns_via.h"
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#include "pns_line.h"
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#include "pns_placement_algo.h"
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namespace PNS {
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class ROUTER;
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class SHOVE;
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class OPTIMIZER;
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class VIA;
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class SIZES_SETTINGS;
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class NODE;
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class FIXED_TAIL
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{
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public:
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FIXED_TAIL( int aLineCount = 1);
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~FIXED_TAIL();
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struct FIX_POINT
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{
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int layer;
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bool placingVias;
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VECTOR2I p;
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DIRECTION_45 direction;
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};
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struct STAGE
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{
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NODE* commit;
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std::vector<FIX_POINT> pts;
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};
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void Clear();
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void AddStage( VECTOR2I aStart, int aLayer, bool placingVias, DIRECTION_45 direction,
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NODE *aNode );
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bool PopStage( STAGE& aStage );
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int StageCount() const;
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private:
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std::vector<STAGE> m_stages;
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};
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class POSTURE_SOLVER
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{
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public:
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POSTURE_SOLVER();
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~POSTURE_SOLVER();
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void Clear();
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void AddTrailPoint( const VECTOR2I& aP );
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void SetTolerance( int toll ) { m_tolerance = toll; }
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void SetDefaultDirections( DIRECTION_45 aInitDirection, DIRECTION_45 aLastSegDir )
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{
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m_direction = aInitDirection;
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m_lastSegDirection = aLastSegDir;
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}
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DIRECTION_45 GetPosture( const VECTOR2I& aP );
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void FlipPosture();
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void SetDisabled( bool aDisabled = true ) { m_disabled = aDisabled; }
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bool IsManuallyForced() const { return m_manuallyForced; }
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private:
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SHAPE_LINE_CHAIN m_trail;
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int m_tolerance;
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DIRECTION_45 m_direction;
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DIRECTION_45 m_lastSegDirection;
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bool m_forced;
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bool m_disabled;
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bool m_manuallyForced;
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};
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/**
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* LINE_PLACER
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*
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* Single track placement algorithm. Interactively routes a track.
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* Applies shove and walkaround algorithms when needed.
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*/
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class LINE_PLACER : public PLACEMENT_ALGO
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{
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public:
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LINE_PLACER( ROUTER* aRouter );
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~LINE_PLACER();
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/**
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* Function Start()
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*
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* Starts routing a single track at point aP, taking item aStartItem as anchor
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* (unless NULL).
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*/
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bool Start( const VECTOR2I& aP, ITEM* aStartItem ) override;
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/**
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* Function Move()
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*
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* Moves the end of the currently routed trace to the point aP, taking
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* aEndItem as anchor (if not NULL).
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* (unless NULL).
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*/
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bool Move( const VECTOR2I& aP, ITEM* aEndItem ) override;
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/**
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* Function FixRoute()
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*
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* Commits the currently routed track to the parent node, taking aP as the final end point
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* and aEndItem as the final anchor (if provided).
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* @return true, if route has been commited. May return false if the routing result is
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* violating design rules - in such case, the track is only committed if CanViolateDRC() is on.
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*/
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bool FixRoute( const VECTOR2I& aP, ITEM* aEndItem, bool aForceFinish ) override;
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bool UnfixRoute() override;
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bool CommitPlacement() override;
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bool AbortPlacement() override;
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bool HasPlacedAnything() const override;
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/**
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* Function ToggleVia()
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*
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* Enables/disables a via at the end of currently routed trace.
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*/
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bool ToggleVia( bool aEnabled ) override;
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/**
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* Function SetLayer()
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*
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* Sets the current routing layer.
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*/
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bool SetLayer( int aLayer ) override;
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/**
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* Function Head()
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*
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* Returns the "head" of the line being placed, that is the volatile part that has not been
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* "fixed" yet.
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*/
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const LINE& Head() const { return m_head; }
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/**
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* Function Tail()
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*
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* Returns the "tail" of the line being placed, the part which has already wrapped around
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* and shoved some obstacles.
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*/
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const LINE& Tail() const { return m_tail; }
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/**
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* Function Trace()
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*
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* Returns the complete routed line.
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*/
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const LINE Trace() const;
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/**
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* Function Traces()
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*
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* Returns the complete routed line, as a single-member ITEM_SET.
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*/
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const ITEM_SET Traces() override;
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/**
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* Function CurrentEnd()
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*
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* Returns the current end of the line being placed. It may not be equal
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* to the cursor position due to collisions.
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*/
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const VECTOR2I& CurrentEnd() const override
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{
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return m_currentEnd;
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}
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/**
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* Function CurrentNet()
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*
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* Returns the net code of currently routed track.
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*/
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const std::vector<int> CurrentNets() const override
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{
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return std::vector<int>( 1, m_currentNet );
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}
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/**
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* Function CurrentLayer()
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*
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* Returns the layer of currently routed track.
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*/
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int CurrentLayer() const override
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{
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return m_currentLayer;
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}
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/**
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* Function CurrentNode()
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*
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* Returns the most recent world state.
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*/
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NODE* CurrentNode( bool aLoopsRemoved = false ) const override;
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/**
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* Function FlipPosture()
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*
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* Toggles the current posture (straight/diagonal) of the trace head.
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*/
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void FlipPosture() override;
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/**
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* Function UpdateSizes()
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*
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* Performs on-the-fly update of the width, via diameter & drill size from a settings class.
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* Used to dynamically change these parameters as the track is routed.
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*/
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void UpdateSizes( const SIZES_SETTINGS& aSizes ) override;
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void SetOrthoMode( bool aOrthoMode ) override;
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bool IsPlacingVia() const override { return m_placingVia; }
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void GetModifiedNets( std::vector<int>& aNets ) const override;
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/**
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* Function SplitAdjacentSegments()
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*
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* Checks if point aP lies on segment aSeg. If so, splits the segment in two, forming a
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* joint at aP and stores updated topology in node aNode.
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*/
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bool SplitAdjacentSegments( NODE* aNode, ITEM* aSeg, const VECTOR2I& aP );
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private:
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/**
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* Function route()
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*
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* Re-routes the current track to point aP. Returns true, when routing has completed
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* successfully (i.e. the trace end has reached point aP), and false if the trace was
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* stuck somewhere on the way. May call routeStep() repetitively due to mouse smoothing.
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* @param aP ending point of current route.
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* @return true, if the routing is complete.
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*/
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bool route( const VECTOR2I& aP );
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/**
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* Function updateLeadingRatLine()
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*
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* Draws the "leading" ratsnest line, which connects the end of currently routed track and
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* the nearest yet unrouted item. If the routing for current net is complete, draws nothing.
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*/
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void updateLeadingRatLine();
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/**
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* Function setWorld()
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*
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* Sets the board to route.
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*/
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void setWorld( NODE* aWorld );
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/**
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* Function startPlacement()
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*
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* Initializes placement of a new line with given parameters.
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*/
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void initPlacement();
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/**
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* Function setInitialDirection()
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*
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* Sets preferred direction of the very first track segment to be laid.
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* Used by posture switching mechanism.
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*/
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void setInitialDirection( const DIRECTION_45& aDirection );
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/**
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* Function removeLoops()
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*
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* Searches aNode for traces concurrent to aLatest and removes them. Updated
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* topology is stored in aNode.
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*/
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void removeLoops( NODE* aNode, LINE& aLatest );
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/**
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* Function simplifyNewLine()
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*
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* Assembles a line starting from segment aLatest, removes collinear segments
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* and redundant vertexes. If a simplification bhas been found, replaces the
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* old line with the simplified one in aNode.
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*/
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void simplifyNewLine( NODE* aNode, SEGMENT* aLatest );
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/**
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* Function checkObtusity()
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*
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* Helper function, checking if segments a and b form an obtuse angle
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* (in 45-degree regime).
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* @return true, if angle (aA, aB) is obtuse
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*/
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bool checkObtusity( const SEG& aA, const SEG& aB ) const;
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/**
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* Function handleSelfIntersections()
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*
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* Checks if the head of the track intersects its tail. If so, cuts the
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* tail up to the intersecting segment and fixes the head direction to match
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* the last segment before the cut.
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* @return true if the line has been changed.
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*/
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bool handleSelfIntersections();
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/**
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* Function handlePullback()
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*
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* Deals with pull-back: reduces the tail if head trace is moved backwards
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* wrs to the current tail direction.
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* @return true if the line has been changed.
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*/
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bool handlePullback();
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/**
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* Function mergeHead()
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*
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* Moves "estabished" segments from the head to the tail if certain
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* conditions are met.
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* @return true, if the line has been changed.
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*/
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bool mergeHead();
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/**
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* Function reduceTail()
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*
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* Attempts to reduce the numer of segments in the tail by trying to replace a
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* certain number of latest tail segments with a direct trace leading to aEnd
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* that does not collide with anything.
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* @param aEnd: current routing destination point.
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* @return true if the line has been changed.
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*/
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bool reduceTail( const VECTOR2I& aEnd );
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/**
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* Function optimizeTailHeadTransition()
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*
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* Tries to reduce the corner count of the most recent part of tail/head by
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* merging obtuse/collinear segments.
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* @return true, if the line has been changed.
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*/
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bool optimizeTailHeadTransition();
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/**
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* Function routeHead()
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*
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* Computes the head trace between the current start point (m_p_start) and
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* point aP, starting with direction defined in m_direction. The trace walks
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* around all colliding solid or non-movable items. Movable segments are
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* ignored, as they'll be handled later by the shove algorithm.
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*/
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bool routeHead( const VECTOR2I& aP, LINE& aNewHead);
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/**
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* Function routeStep()
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*
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* Performs a single routing alorithm step, for the end point aP.
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* @param aP ending point of current route
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* @return true, if the line has been changed.
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*/
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void routeStep( const VECTOR2I& aP );
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///> route step, walkaround mode
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bool rhWalkOnly( const VECTOR2I& aP, LINE& aNewHead);
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///> route step, shove mode
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bool rhShoveOnly( const VECTOR2I& aP, LINE& aNewHead);
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///> route step, mark obstacles mode
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bool rhMarkObstacles( const VECTOR2I& aP, LINE& aNewHead );
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const VIA makeVia( const VECTOR2I& aP );
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bool buildInitialLine( const VECTOR2I& aP, LINE& aHead );
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DIRECTION_45 m_direction; ///> current routing direction
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DIRECTION_45 m_initial_direction; ///> routing direction for new traces
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LINE m_head; ///> the volatile part of the track from the previously
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///> analyzed point to the current routing destination
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LINE m_tail; ///> routing "tail": part of the track that has been already
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///> fixed due to collisions with obstacles
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NODE* m_world; ///> pointer to world to search colliding items
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VECTOR2I m_p_start; ///> current routing start (end of tail, beginning of head)
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std::unique_ptr<SHOVE> m_shove; ///> The shove engine
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NODE* m_currentNode; ///> Current world state
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NODE* m_lastNode; ///> Postprocessed world state (including marked collisions &
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///> removed loops)
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SIZES_SETTINGS m_sizes;
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bool m_placingVia;
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int m_currentNet;
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int m_currentLayer;
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VECTOR2I m_currentEnd;
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VECTOR2I m_currentStart;
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LINE m_currentTrace;
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PNS_MODE m_currentMode;
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ITEM* m_startItem;
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bool m_idle;
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bool m_chainedPlacement;
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bool m_orthoMode;
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bool m_placementCorrect;
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FIXED_TAIL m_fixedTail;
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POSTURE_SOLVER m_postureSolver;
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};
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}
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#endif // __PNS_LINE_PLACER_H
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