741 lines
18 KiB
C++
741 lines
18 KiB
C++
/*
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* KiRouter - a push-and-(sometimes-)shove PCB router
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*
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* Copyright (C) 2013-2014 CERN
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* Copyright (C) 2016-2022 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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#include <base_units.h> // God forgive me doing this...
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#include "pns_node.h"
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#include "pns_itemset.h"
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#include "pns_meander.h"
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#include "pns_meander_placer_base.h"
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#include "pns_router.h"
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#include "pns_debug_decorator.h"
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namespace PNS {
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const MEANDER_SETTINGS& MEANDER_SHAPE::Settings() const
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{
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return m_placer->MeanderSettings();
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}
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const MEANDER_SETTINGS& MEANDERED_LINE::Settings() const
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{
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return m_placer->MeanderSettings();
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}
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void MEANDERED_LINE::MeanderSegment( const SEG& aBase, bool aSide, int aBaseIndex )
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{
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double base_len = aBase.Length();
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SHAPE_LINE_CHAIN lc;
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bool singleSided = Settings().m_singleSided;
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bool side = aSide;
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VECTOR2D dir( aBase.B - aBase.A );
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if( !m_dual )
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AddCorner( aBase.A );
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bool turning = false;
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bool started = false;
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m_last = aBase.A;
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do
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{
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MEANDER_SHAPE m( m_placer, m_width, m_dual );
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m.SetBaselineOffset( m_baselineOffset );
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m.SetBaseIndex( aBaseIndex );
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double thr = (double) m.spacing();
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bool fail = false;
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double remaining = base_len - ( m_last - aBase.A ).EuclideanNorm();
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auto addSingleIfFits = [&]()
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{
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fail = true;
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if( m.Fit( MT_SINGLE, aBase, m_last, side ) )
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{
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AddMeander( new MEANDER_SHAPE( m ) );
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fail = false;
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started = false;
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}
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if( fail && !singleSided )
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{
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if( m.Fit( MT_SINGLE, aBase, m_last, !side ) )
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{
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AddMeander( new MEANDER_SHAPE( m ) );
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fail = false;
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started = false;
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side = !side;
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}
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}
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};
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if( remaining < Settings( ).m_step )
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break;
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if( !singleSided && remaining > 3.0 * thr )
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{
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if( !turning )
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{
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for( int i = 0; i < 2; i++ )
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{
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bool checkSide = ( i == 0 ) ? side : !side;
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if( m.Fit( MT_CHECK_START, aBase, m_last, checkSide ) )
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{
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turning = true;
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AddMeander( new MEANDER_SHAPE( m ) );
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side = !checkSide;
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started = true;
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break;
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}
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}
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if( !turning )
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addSingleIfFits();
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}
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else
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{
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bool rv = m.Fit( MT_CHECK_FINISH, aBase, m_last, side );
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if( rv )
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{
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m.Fit( MT_TURN, aBase, m_last, side );
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AddMeander( new MEANDER_SHAPE( m ) );
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side = !side;
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started = true;
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}
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else
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{
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m.Fit( MT_FINISH, aBase, m_last, side );
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started = false;
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AddMeander( new MEANDER_SHAPE( m ) );
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turning = false;
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}
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}
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}
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else if( !singleSided && started )
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{
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bool rv = m.Fit( MT_FINISH, aBase, m_last, side );
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if( rv )
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AddMeander( new MEANDER_SHAPE( m ) );
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break;
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}
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else if( !turning && remaining > thr * 2.0 )
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{
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addSingleIfFits();
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}
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else
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{
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fail = true;
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}
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remaining = base_len - ( m_last - aBase.A ).EuclideanNorm( );
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if( remaining < Settings( ).m_step )
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break;
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if( fail )
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{
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MEANDER_SHAPE tmp( m_placer, m_width, m_dual );
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tmp.SetBaselineOffset( m_baselineOffset );
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tmp.SetBaseIndex( aBaseIndex );
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int nextP = tmp.spacing() - 2 * tmp.cornerRadius() + Settings().m_step;
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VECTOR2I pn = m_last + dir.Resize( nextP );
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if( aBase.Contains( pn ) && !m_dual )
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{
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AddCorner( pn );
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} else
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break;
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}
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} while( true );
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if( !m_dual )
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AddCorner( aBase.B );
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}
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int MEANDER_SHAPE::MinAmplitude() const
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{
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int minAmplitude = Settings().m_minAmplitude;
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// DP meanders don't really support smaller amplitudes
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minAmplitude = std::max( minAmplitude, std::abs( m_baselineOffset ) * 2 );
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// The path length won't be correct with very small arcs
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if( m_placer->MeanderSettings().m_cornerStyle == MEANDER_STYLE_ROUND )
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minAmplitude = std::max( minAmplitude, m_width + std::abs( m_baselineOffset ) * 2 );
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return minAmplitude;
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}
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int MEANDER_SHAPE::cornerRadius() const
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{
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// TODO: fix diff-pair meandering so we can use non-100% radii
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int rPercent = m_dual ? 100 : Settings().m_cornerRadiusPercentage;
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int optCr = (int64_t) spacing() * rPercent / 200;
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int minCr = std::abs( m_baselineOffset );
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int maxCr = std::min( m_amplitude / 2, spacing() / 2 );
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if( maxCr > minCr )
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return std::clamp( optCr, minCr, maxCr );
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else
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return maxCr;
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}
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int MEANDER_SHAPE::spacing( ) const
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{
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if( !m_dual )
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{
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return std::max( m_width + m_placer->Clearance(), Settings().m_spacing );
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}
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else
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{
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int sp = m_width + m_placer->Clearance() + ( 2 * std::abs( m_baselineOffset ) );
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return std::max( sp, Settings().m_spacing );
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}
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}
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SHAPE_LINE_CHAIN MEANDER_SHAPE::makeMiterShape( const VECTOR2D& aP, const VECTOR2D& aDir,
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bool aSide )
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{
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SHAPE_LINE_CHAIN lc;
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if( aDir.EuclideanNorm( ) == 0.0f )
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{
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lc.Append( aP );
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return lc;
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}
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VECTOR2D dir_u( aDir );
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VECTOR2D dir_v( aDir.Perpendicular( ) );
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VECTOR2D p = aP;
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lc.Append( ( int ) p.x, ( int ) p.y );
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// fixme: refactor
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switch( m_placer->MeanderSettings().m_cornerStyle )
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{
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case MEANDER_STYLE_ROUND:
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{
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VECTOR2D center = aP + dir_v * ( aSide ? -1.0 : 1.0 );
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lc.Append( SHAPE_ARC( center, aP, ( aSide ? -ANGLE_90 : ANGLE_90 ) ) );
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}
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break;
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case MEANDER_STYLE_CHAMFER:
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{
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double radius = (double) aDir.EuclideanNorm();
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double correction = 0;
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if( m_dual && radius > m_meanCornerRadius )
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correction = (double)( -2 * abs(m_baselineOffset) ) * tan( 22.5 * M_PI / 180.0 );
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VECTOR2D dir_cu = dir_u.Resize( correction );
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VECTOR2D dir_cv = dir_v.Resize( correction );
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p = aP - dir_cu;
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lc.Append( ( int ) p.x, ( int ) p.y );
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p = aP + dir_u + (dir_v + dir_cv) * ( aSide ? -1.0 : 1.0 );
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lc.Append( ( int ) p.x, ( int ) p.y );
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}
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break;
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}
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p = aP + dir_u + dir_v * ( aSide ? -1.0 : 1.0 );
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lc.Append( ( int ) p.x, ( int ) p.y );
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return lc;
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}
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void MEANDER_SHAPE::start( SHAPE_LINE_CHAIN* aTarget, const VECTOR2D& aWhere, const VECTOR2D& aDir )
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{
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m_currentTarget = aTarget;
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m_currentTarget->Clear();
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m_currentTarget->Append( aWhere );
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m_currentDir = aDir;
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m_currentPos = aWhere;
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}
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void MEANDER_SHAPE::forward( int aLength )
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{
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// Very small segments cause problems.
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if( aLength < 5 )
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return;
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m_currentPos += m_currentDir.Resize( aLength );
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m_currentTarget->Append( m_currentPos );
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}
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void MEANDER_SHAPE::turn( const EDA_ANGLE& aAngle )
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{
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RotatePoint( m_currentDir, aAngle );
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}
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void MEANDER_SHAPE::miter( int aRadius, bool aSide )
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{
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if( aRadius <= 0 )
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{
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turn( aSide ? ANGLE_90 : -ANGLE_90 );
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return;
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}
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VECTOR2D dir = m_currentDir.Resize( (double) aRadius );
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SHAPE_LINE_CHAIN lc = makeMiterShape( m_currentPos, dir, aSide );
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m_currentPos = lc.CPoint( -1 );
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turn( aSide ? ANGLE_90 : -ANGLE_90 );
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m_currentTarget->Append( lc );
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}
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void MEANDER_SHAPE::uShape( int aSides, int aCorner, int aTop )
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{
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forward( aSides );
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miter( aCorner, true );
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forward( aTop );
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miter( aCorner, true );
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forward( aSides );
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}
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SHAPE_LINE_CHAIN MEANDER_SHAPE::genMeanderShape( const VECTOR2D& aP, const VECTOR2D& aDir,
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bool aSide, MEANDER_TYPE aType,
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int aBaselineOffset )
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{
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int cr = cornerRadius();
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int offset = aBaselineOffset;
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int spc = spacing();
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int amplitude = m_amplitude;
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int targetBaseLen = m_targetBaseLen;
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if( aSide )
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offset *= -1;
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VECTOR2D dir_u_b( aDir.Resize( offset ) );
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VECTOR2D dir_v_b( dir_u_b.Perpendicular() );
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if( 2 * cr > amplitude )
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{
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cr = amplitude / 2;
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}
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if( 2 * cr > spc )
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{
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cr = spc / 2;
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}
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if( cr - offset < 0 )
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{
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cr = offset;
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}
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m_meanCornerRadius = cr;
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int sCorner = cr - offset;
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int uCorner = cr + offset;
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int startSide = amplitude - 2 * cr + std::abs( offset );
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int turnSide = amplitude - cr;
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int top = spc - 2 * cr;
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SHAPE_LINE_CHAIN lc;
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start( &lc, aP + dir_v_b, aDir );
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switch( aType )
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{
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case MT_EMPTY:
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{
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lc.Append( aP + dir_v_b + aDir );
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break;
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}
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case MT_START:
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{
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if( targetBaseLen )
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top = std::max( top, targetBaseLen - sCorner - uCorner * 2 + offset );
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miter( sCorner, false );
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uShape( startSide, uCorner, top );
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forward( std::min( sCorner, uCorner ) );
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forward( std::abs( offset ) );
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break;
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}
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case MT_FINISH:
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{
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if( targetBaseLen )
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top = std::max( top, targetBaseLen - cr - spc );
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start( &lc, aP - dir_u_b, aDir );
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turn( -ANGLE_90 );
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forward( std::min( sCorner, uCorner ) );
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forward( std::abs( offset ) );
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uShape( startSide, uCorner, top );
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miter( sCorner, false );
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if( targetBaseLen >= spc + cr )
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lc.Append( aP + dir_v_b + aDir.Resize( targetBaseLen ) );
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else
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lc.Append( aP + dir_v_b + aDir.Resize( 2 * spc - cr ) );
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break;
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}
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case MT_TURN:
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{
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if( targetBaseLen )
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top = std::max( top, targetBaseLen - uCorner * 2 + offset * 2 );
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start( &lc, aP - dir_u_b, aDir );
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turn( -ANGLE_90 );
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forward( std::abs( offset ) );
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uShape( turnSide, uCorner, top );
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forward( std::abs( offset ) );
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break;
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}
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case MT_SINGLE:
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{
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if( targetBaseLen )
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top = std::max( top, ( targetBaseLen - sCorner * 2 - uCorner * 2 ) / 2 );
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miter( sCorner, false );
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uShape( startSide, uCorner, top );
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miter( sCorner, false );
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lc.Append( aP + dir_v_b + aDir.Resize( 2 * spc ) );
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break;
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}
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default: break;
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}
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if( aSide )
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{
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SEG axis( aP, aP + aDir );
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lc.Mirror( axis );
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}
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return lc;
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}
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bool MEANDERED_LINE::CheckSelfIntersections( MEANDER_SHAPE* aShape, int aClearance )
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{
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for( int i = m_meanders.size() - 1; i >= 0; i-- )
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{
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MEANDER_SHAPE* m = m_meanders[i];
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if( m->Type() == MT_EMPTY || m->Type() == MT_CORNER )
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continue;
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const SEG& b1 = aShape->BaseSegment();
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const SEG& b2 = m->BaseSegment();
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if( b1.ApproxParallel( b2 ) )
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continue;
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int n = m->CLine( 0 ).SegmentCount();
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for( int j = n - 1; j >= 0; j-- )
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{
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if( aShape->CLine( 0 ).Collide( m->CLine( 0 ) .CSegment( j ), aClearance ) )
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return false;
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}
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}
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return true;
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}
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bool MEANDER_SHAPE::Fit( MEANDER_TYPE aType, const SEG& aSeg, const VECTOR2I& aP, bool aSide )
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{
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const MEANDER_SETTINGS& st = Settings();
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bool checkMode = false;
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MEANDER_TYPE prim1, prim2;
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if( aType == MT_CHECK_START )
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{
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prim1 = MT_START;
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prim2 = MT_TURN;
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checkMode = true;
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}
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else if( aType == MT_CHECK_FINISH )
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{
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prim1 = MT_TURN;
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prim2 = MT_FINISH;
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checkMode = true;
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}
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if( checkMode )
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{
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MEANDER_SHAPE m1( m_placer, m_width, m_dual );
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MEANDER_SHAPE m2( m_placer, m_width, m_dual );
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m1.SetBaselineOffset( m_baselineOffset );
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m2.SetBaselineOffset( m_baselineOffset );
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bool c1 = m1.Fit( prim1, aSeg, aP, aSide );
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bool c2 = false;
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if( c1 )
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c2 = m2.Fit( prim2, aSeg, m1.End(), !aSide );
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if( c1 && c2 )
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{
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m_type = prim1;
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m_shapes[0] = m1.m_shapes[0];
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m_shapes[1] = m1.m_shapes[1];
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m_baseSeg =aSeg;
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m_p0 = aP;
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m_side = aSide;
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m_amplitude = m1.Amplitude();
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m_dual = m1.m_dual;
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m_baseSeg = m1.m_baseSeg;
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m_baseIndex = m1.m_baseIndex;
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updateBaseSegment();
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m_baselineOffset = m1.m_baselineOffset;
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return true;
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}
|
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else
|
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{
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return false;
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}
|
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}
|
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|
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int minAmpl = MinAmplitude();
|
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int maxAmpl = std::max( st.m_maxAmplitude, minAmpl );
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|
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for( int ampl = maxAmpl; ampl >= minAmpl; ampl -= st.m_step )
|
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{
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m_amplitude = ampl;
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|
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if( m_dual )
|
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{
|
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m_shapes[0] = genMeanderShape( aP, aSeg.B - aSeg.A, aSide, aType, m_baselineOffset );
|
|
m_shapes[1] = genMeanderShape( aP, aSeg.B - aSeg.A, aSide, aType, -m_baselineOffset );
|
|
}
|
|
else
|
|
{
|
|
m_shapes[0] = genMeanderShape( aP, aSeg.B - aSeg.A, aSide, aType, 0 );
|
|
}
|
|
|
|
m_type = aType;
|
|
m_baseSeg = aSeg;
|
|
m_p0 = aP;
|
|
m_side = aSide;
|
|
|
|
updateBaseSegment();
|
|
|
|
if( m_placer->CheckFit( this ) )
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
void MEANDER_SHAPE::Recalculate()
|
|
{
|
|
m_shapes[0] = genMeanderShape( m_p0, m_baseSeg.B - m_baseSeg.A, m_side, m_type,
|
|
m_dual ? m_baselineOffset : 0 );
|
|
|
|
if( m_dual )
|
|
m_shapes[1] = genMeanderShape( m_p0, m_baseSeg.B - m_baseSeg.A, m_side, m_type,
|
|
-m_baselineOffset );
|
|
|
|
updateBaseSegment();
|
|
}
|
|
|
|
|
|
void MEANDER_SHAPE::Resize( int aAmpl )
|
|
{
|
|
if( aAmpl < 0 )
|
|
return;
|
|
|
|
m_amplitude = aAmpl;
|
|
|
|
Recalculate();
|
|
}
|
|
|
|
|
|
void MEANDER_SHAPE::MakeEmpty()
|
|
{
|
|
updateBaseSegment();
|
|
|
|
VECTOR2I dir = m_clippedBaseSeg.B - m_clippedBaseSeg.A;
|
|
|
|
m_type = MT_EMPTY;
|
|
m_amplitude = 0;
|
|
|
|
m_shapes[0] = genMeanderShape( m_p0, dir, m_side, m_type, m_dual ? m_baselineOffset : 0 );
|
|
|
|
if( m_dual )
|
|
m_shapes[1] = genMeanderShape( m_p0, dir, m_side, m_type, -m_baselineOffset );
|
|
}
|
|
|
|
|
|
void MEANDERED_LINE::AddCorner( const VECTOR2I& aA, const VECTOR2I& aB )
|
|
{
|
|
MEANDER_SHAPE* m = new MEANDER_SHAPE( m_placer, m_width, m_dual );
|
|
|
|
m->MakeCorner( aA, aB );
|
|
m_last = aA;
|
|
|
|
m_meanders.push_back( m );
|
|
}
|
|
|
|
|
|
void MEANDERED_LINE::AddArc( const SHAPE_ARC& aArc1, const SHAPE_ARC& aArc2 )
|
|
{
|
|
MEANDER_SHAPE* m = new MEANDER_SHAPE( m_placer, m_width, m_dual );
|
|
|
|
m->MakeArc( aArc1, aArc2 );
|
|
m_last = aArc1.GetP1();
|
|
|
|
m_meanders.push_back( m );
|
|
}
|
|
|
|
|
|
void MEANDERED_LINE::AddArcAndPt( const SHAPE_ARC& aArc1, const VECTOR2I& aPt2 )
|
|
{
|
|
SHAPE_ARC arc2( aPt2, aPt2, aPt2, 0 );
|
|
|
|
AddArc( aArc1, arc2 );
|
|
}
|
|
|
|
|
|
void MEANDERED_LINE::AddPtAndArc( const VECTOR2I& aPt1, const SHAPE_ARC& aArc2 )
|
|
{
|
|
SHAPE_ARC arc1( aPt1, aPt1, aPt1, 0 );
|
|
|
|
AddArc( arc1, aArc2 );
|
|
}
|
|
|
|
|
|
void MEANDER_SHAPE::MakeCorner( const VECTOR2I& aP1, const VECTOR2I& aP2 )
|
|
{
|
|
SetType( MT_CORNER );
|
|
m_shapes[0].Clear();
|
|
m_shapes[1].Clear();
|
|
m_shapes[0].Append( aP1 );
|
|
m_shapes[1].Append( aP2 );
|
|
m_clippedBaseSeg.A = aP1;
|
|
m_clippedBaseSeg.B = aP1;
|
|
}
|
|
|
|
|
|
void MEANDER_SHAPE::MakeArc( const SHAPE_ARC& aArc1, const SHAPE_ARC& aArc2 )
|
|
{
|
|
SetType( MT_CORNER );
|
|
m_shapes[0].Clear();
|
|
m_shapes[1].Clear();
|
|
m_shapes[0].Append( aArc1 );
|
|
m_shapes[1].Append( aArc2 );
|
|
m_clippedBaseSeg.A = aArc1.GetP1();
|
|
m_clippedBaseSeg.B = aArc1.GetP1();
|
|
}
|
|
|
|
|
|
void MEANDERED_LINE::AddMeander( MEANDER_SHAPE* aShape )
|
|
{
|
|
m_last = aShape->BaseSegment().B;
|
|
m_meanders.push_back( aShape );
|
|
}
|
|
|
|
|
|
void MEANDERED_LINE::Clear()
|
|
{
|
|
for( MEANDER_SHAPE* m : m_meanders )
|
|
{
|
|
delete m;
|
|
}
|
|
|
|
m_meanders.clear( );
|
|
}
|
|
|
|
|
|
int MEANDER_SHAPE::BaselineLength() const
|
|
{
|
|
return m_clippedBaseSeg.Length();
|
|
}
|
|
|
|
|
|
long long int MEANDER_SHAPE::CurrentLength() const
|
|
{
|
|
return CLine( 0 ).Length();
|
|
}
|
|
|
|
|
|
long long int MEANDER_SHAPE::MinTunableLength() const
|
|
{
|
|
MEANDER_SHAPE copy = *this;
|
|
|
|
copy.SetTargetBaselineLength( BaselineLength() );
|
|
copy.Resize( copy.MinAmplitude() );
|
|
|
|
return copy.CurrentLength();
|
|
}
|
|
|
|
|
|
void MEANDER_SHAPE::updateBaseSegment( )
|
|
{
|
|
if( m_dual )
|
|
{
|
|
VECTOR2I midpA = ( CLine( 0 ).CPoint( 0 ) + CLine( 1 ).CPoint( 0 ) ) / 2;
|
|
VECTOR2I midpB = ( CLine( 0 ).CPoint( -1 ) + CLine( 1 ).CPoint( -1 ) ) / 2;
|
|
|
|
m_clippedBaseSeg.A = m_baseSeg.LineProject( midpA );
|
|
m_clippedBaseSeg.B = m_baseSeg.LineProject( midpB );
|
|
}
|
|
else
|
|
{
|
|
m_clippedBaseSeg.A = m_baseSeg.LineProject( CLine( 0 ).CPoint( 0 ) );
|
|
m_clippedBaseSeg.B = m_baseSeg.LineProject( CLine( 0 ).CPoint( -1 ) );
|
|
}
|
|
}
|
|
|
|
}
|