893 lines
20 KiB
C++
893 lines
20 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 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 <boost/optional.hpp>
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#include <math/vector2d.h>
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#include "pns_line.h"
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#include "pns_node.h"
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#include "pns_via.h"
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#include "pns_utils.h"
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#include "pns_router.h"
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#include <geometry/shape_rect.h>
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using boost::optional;
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namespace PNS {
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LINE::LINE( const LINE& aOther ) :
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ITEM( aOther ),
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m_line( aOther.m_line ),
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m_width( aOther.m_width )
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{
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m_net = aOther.m_net;
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m_movable = aOther.m_movable;
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m_layers = aOther.m_layers;
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m_via = aOther.m_via;
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m_hasVia = aOther.m_hasVia;
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m_marker = aOther.m_marker;
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m_rank = aOther.m_rank;
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copyLinks( &aOther );
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}
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LINE::~LINE()
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{
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}
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const LINE& LINE::operator=( const LINE& aOther )
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{
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m_line = aOther.m_line;
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m_width = aOther.m_width;
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m_net = aOther.m_net;
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m_movable = aOther.m_movable;
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m_layers = aOther.m_layers;
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m_via = aOther.m_via;
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m_hasVia = aOther.m_hasVia;
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m_marker = aOther.m_marker;
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m_rank = aOther.m_rank;
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copyLinks( &aOther );
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return *this;
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}
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LINE* LINE::Clone() const
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{
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LINE* l = new LINE( *this );
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return l;
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}
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void LINE::Mark( int aMarker )
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{
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m_marker = aMarker;
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for( SEGMENT* s : m_segmentRefs )
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s->Mark( aMarker );
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}
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void LINE::Unmark()
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{
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for( SEGMENT* s : m_segmentRefs )
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s->Unmark();
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m_marker = 0;
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}
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int LINE::Marker() const
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{
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int marker = m_marker;
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for( SEGMENT* s : m_segmentRefs )
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{
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marker |= s->Marker();
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}
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return marker;
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}
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void LINE::copyLinks( const LINE* aParent )
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{
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m_segmentRefs = aParent->m_segmentRefs;
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}
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SEGMENT* SEGMENT::Clone() const
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{
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SEGMENT* s = new SEGMENT;
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s->m_seg = m_seg;
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s->m_net = m_net;
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s->m_layers = m_layers;
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s->m_marker = m_marker;
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s->m_rank = m_rank;
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return s;
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}
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int LINE::CountCorners( int aAngles ) const
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{
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int count = 0;
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for( int i = 0; i < m_line.SegmentCount() - 1; i++ )
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{
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const SEG seg1 = m_line.CSegment( i );
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const SEG seg2 = m_line.CSegment( i + 1 );
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const DIRECTION_45 dir1( seg1 );
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const DIRECTION_45 dir2( seg2 );
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DIRECTION_45::AngleType a = dir1.Angle( dir2 );
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if( a & aAngles )
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count++;
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}
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return count;
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}
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bool LINE::Walkaround( SHAPE_LINE_CHAIN aObstacle, SHAPE_LINE_CHAIN& aPre,
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SHAPE_LINE_CHAIN& aWalk, SHAPE_LINE_CHAIN& aPost, bool aCw ) const
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{
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const SHAPE_LINE_CHAIN& line( CLine() );
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VECTOR2I ip_start;
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VECTOR2I ip_end;
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if( line.SegmentCount() < 1 )
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return false;
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if( aObstacle.PointInside( line.CPoint( 0 ) ) || aObstacle.PointInside( line.CPoint( -1 ) ) )
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return false;
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SHAPE_LINE_CHAIN::INTERSECTIONS ips, ips2;
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line.Intersect( aObstacle, ips );
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aWalk.Clear();
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aPost.Clear();
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int nearest_dist = INT_MAX;
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int farthest_dist = 0;
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SHAPE_LINE_CHAIN::INTERSECTION nearest, farthest;
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for( int i = 0; i < (int) ips.size(); i++ )
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{
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const VECTOR2I p = ips[i].p;
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int dist = line.PathLength( p );
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if( dist < 0 )
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return false;
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if( dist <= nearest_dist )
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{
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nearest_dist = dist;
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nearest = ips[i];
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}
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if( dist >= farthest_dist )
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{
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farthest_dist = dist;
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farthest = ips[i];
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}
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}
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if( ips.size() <= 1 || nearest.p == farthest.p )
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{
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aPre = line;
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return true;
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}
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aPre = line.Slice( 0, nearest.our.Index() );
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aPre.Append( nearest.p );
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aPre.Simplify();
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aWalk.Clear();
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aWalk.SetClosed( false );
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aWalk.Append( nearest.p );
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assert( nearest.their.Index() >= 0 );
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assert( farthest.their.Index() >= 0 );
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assert( nearest_dist <= farthest_dist );
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aObstacle.Split( nearest.p );
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aObstacle.Split( farthest.p );
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int i_first = aObstacle.Find( nearest.p );
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int i_last = aObstacle.Find( farthest.p );
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int i = i_first;
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while( i != i_last )
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{
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aWalk.Append( aObstacle.CPoint( i ) );
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i += ( aCw ? 1 : -1 );
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if( i < 0 )
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i = aObstacle.PointCount() - 1;
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else if( i == aObstacle.PointCount() )
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i = 0;
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}
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aWalk.Append( farthest.p );
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aWalk.Simplify();
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aPost.Clear();
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aPost.Append( farthest.p );
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aPost.Append( line.Slice( farthest.our.Index() + 1, -1 ) );
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aPost.Simplify();
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return true;
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}
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void LINE::Walkaround( const SHAPE_LINE_CHAIN& aObstacle, SHAPE_LINE_CHAIN& aPath, bool aCw ) const
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{
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SHAPE_LINE_CHAIN walk, post;
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Walkaround( aObstacle, aPath, walk, post, aCw );
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aPath.Append( walk );
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aPath.Append( post );
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aPath.Simplify();
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}
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const SHAPE_LINE_CHAIN SEGMENT::Hull( int aClearance, int aWalkaroundThickness ) const
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{
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return SegmentHull( m_seg, aClearance, aWalkaroundThickness );
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}
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bool LINE::Is45Degree() const
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{
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for( int i = 0; i < m_line.SegmentCount(); i++ )
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{
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const SEG& s = m_line.CSegment( i );
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if( s.Length() < 10 )
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continue;
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double angle = 180.0 / M_PI *
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atan2( (double) s.B.y - (double) s.A.y,
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(double) s.B.x - (double) s.A.x );
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if( angle < 0 )
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angle += 360.0;
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double angle_a = fabs( fmod( angle, 45.0 ) );
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if( angle_a > 1.0 && angle_a < 44.0 )
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return false;
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}
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return true;
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}
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const LINE LINE::ClipToNearestObstacle( NODE* aNode ) const
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{
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const int IterationLimit = 5;
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int i;
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LINE l( *this );
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for( i = 0; i < IterationLimit; i++ )
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{
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NODE::OPT_OBSTACLE obs = aNode->NearestObstacle( &l );
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if( obs )
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{
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l.RemoveVia();
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int p = l.Line().Split( obs->m_ipFirst );
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l.Line().Remove( p + 1, -1 );
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} else
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break;
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}
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if( i == IterationLimit )
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l.Line().Clear();
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return l;
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}
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void LINE::ShowLinks() const
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{
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if( !IsLinked() )
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{
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wxLogTrace( "PNS", "line %p: no links", this );
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return;
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}
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wxLogTrace( "PNS", "line %p: %d linked segs", this, (int) m_segmentRefs.size() );
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for( int i = 0; i < (int) m_segmentRefs.size(); i++ )
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wxLogTrace( "PNS", "seg %d: %p\n", i, m_segmentRefs[i] );
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}
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SHAPE_LINE_CHAIN dragCornerInternal( const SHAPE_LINE_CHAIN& aOrigin, const VECTOR2I& aP )
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{
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optional<SHAPE_LINE_CHAIN> picked;
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int i;
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int d = 2;
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if( aOrigin.SegmentCount() == 1)
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{
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DIRECTION_45 dir( aOrigin.CPoint( 0 ) - aOrigin.CPoint( 1 ) );
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return DIRECTION_45().BuildInitialTrace( aOrigin.CPoint( 0 ), aP, dir.IsDiagonal() );
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}
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if( aOrigin.CSegment( -1 ).Length() > 100000 * 30 ) // fixme: constant/parameter?
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d = 1;
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for( i = aOrigin.SegmentCount() - d; i >= 0; i-- )
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{
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DIRECTION_45 d_start( aOrigin.CSegment( i ) );
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VECTOR2I p_start = aOrigin.CPoint( i );
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SHAPE_LINE_CHAIN paths[2];
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DIRECTION_45 dirs[2];
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DIRECTION_45 d_prev = ( i > 0 ? DIRECTION_45( aOrigin.CSegment( i-1 ) ) : DIRECTION_45() );
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for( int j = 0; j < 2; j++ )
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{
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paths[j] = d_start.BuildInitialTrace( p_start, aP, j );
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dirs[j] = DIRECTION_45( paths[j].CSegment( 0 ) );
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}
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for( int j = 0; j < 2; j++ )
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{
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if( dirs[j] == d_start )
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{
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picked = paths[j];
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break;
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}
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}
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if( picked )
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break;
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for( int j = 0; j < 2; j++ )
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{
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if( dirs[j].IsObtuse( d_prev ) )
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{
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picked = paths[j];
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break;
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}
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}
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if( picked )
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break;
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}
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if( picked )
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{
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SHAPE_LINE_CHAIN path = aOrigin.Slice( 0, i );
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path.Append( *picked );
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return path;
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}
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DIRECTION_45 dir( aOrigin.CPoint( -1 ) - aOrigin.CPoint( -2 ) );
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return DIRECTION_45().BuildInitialTrace( aOrigin.CPoint( 0 ), aP, dir.IsDiagonal() );
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}
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void LINE::DragCorner( const VECTOR2I& aP, int aIndex, int aSnappingThreshold )
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{
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SHAPE_LINE_CHAIN path;
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VECTOR2I snapped = snapDraggedCorner( m_line, aP, aIndex, aSnappingThreshold );
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if( aIndex == 0 )
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path = dragCornerInternal( m_line.Reverse(), snapped ).Reverse();
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else if( aIndex == m_line.SegmentCount() )
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path = dragCornerInternal( m_line, snapped );
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else
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{
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// fixme: awkward behaviour for "outwards" drags
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path = dragCornerInternal( m_line.Slice( 0, aIndex ), snapped );
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SHAPE_LINE_CHAIN path_rev = dragCornerInternal( m_line.Slice( aIndex, -1 ).Reverse(),
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snapped ).Reverse();
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path.Append( path_rev );
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}
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path.Simplify();
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m_line = path;
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}
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VECTOR2I LINE::snapDraggedCorner( const SHAPE_LINE_CHAIN& aPath, const VECTOR2I& aP,
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int aIndex, int aThreshold ) const
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{
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int s_start = std::max( aIndex - 2, 0 );
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int s_end = std::min( aIndex + 2, aPath.SegmentCount() - 1 );
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int i, j;
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int best_dist = INT_MAX;
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VECTOR2I best_snap = aP;
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if( aThreshold <= 0 )
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return aP;
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for( i = s_start; i <= s_end; i++ )
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{
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const SEG& a = aPath.CSegment( i );
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for( j = s_start; j < i; j++ )
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{
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const SEG& b = aPath.CSegment( j );
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if( !( DIRECTION_45( a ).IsObtuse(DIRECTION_45( b ) ) ) )
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continue;
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OPT_VECTOR2I ip = a.IntersectLines(b);
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if( ip )
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{
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int dist = ( *ip - aP ).EuclideanNorm();
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if( dist < aThreshold && dist < best_dist )
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{
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best_dist = dist;
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best_snap = *ip;
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}
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}
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}
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}
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return best_snap;
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}
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VECTOR2I LINE::snapToNeighbourSegments( const SHAPE_LINE_CHAIN& aPath, const VECTOR2I &aP,
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int aIndex, int aThreshold ) const
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{
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VECTOR2I snap_p[2];
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DIRECTION_45 dragDir( aPath.CSegment( aIndex ) );
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int snap_d[2] = { -1, -1 };
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if( aThreshold == 0 )
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return aP;
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if( aIndex >= 2 )
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{
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SEG s = aPath.CSegment( aIndex - 2 );
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if( DIRECTION_45( s ) == dragDir )
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snap_d[0] = s.LineDistance( aP );
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snap_p[0] = s.A;
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}
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if( aIndex < aPath.SegmentCount() - 2 )
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{
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SEG s = aPath.CSegment( aIndex + 2 );
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if( DIRECTION_45( s ) == dragDir )
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snap_d[1] = s.LineDistance(aP);
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snap_p[1] = s.A;
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}
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VECTOR2I best = aP;
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int minDist = INT_MAX;
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for( int i = 0; i < 2; i++ )
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{
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if( snap_d[i] >= 0 && snap_d[i] < minDist && snap_d[i] <= aThreshold )
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{
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minDist = snap_d[i];
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best = snap_p[i];
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}
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}
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return best;
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}
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void LINE::DragSegment( const VECTOR2I& aP, int aIndex, int aSnappingThreshold )
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{
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SHAPE_LINE_CHAIN path( m_line );
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VECTOR2I target( aP );
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SEG guideA[2], guideB[2];
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int index = aIndex;
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target = snapToNeighbourSegments( path, aP, aIndex, aSnappingThreshold );
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if( index == 0 )
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{
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path.Insert( 0, path.CPoint( 0 ) );
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index++;
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}
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if( index == path.SegmentCount() - 1 )
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{
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path.Insert( path.PointCount() - 1, path.CPoint( -1 ) );
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}
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SEG dragged = path.CSegment( index );
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DIRECTION_45 drag_dir( dragged );
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SEG s_prev = path.CSegment( index - 1 );
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SEG s_next = path.CSegment( index + 1 );
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DIRECTION_45 dir_prev( s_prev );
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DIRECTION_45 dir_next( s_next );
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if( dir_prev == drag_dir )
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{
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dir_prev = dir_prev.Left();
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path.Insert( index, path.CPoint( index ) );
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index++;
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}
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if( dir_next == drag_dir )
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{
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dir_next = dir_next.Right();
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path.Insert( index + 1, path.CPoint( index + 1 ) );
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}
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s_prev = path.CSegment( index - 1 );
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s_next = path.CSegment( index + 1 );
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dragged = path.CSegment( index );
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const bool lockEndpointA = true;
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const bool lockEndpointB = true;
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if( aIndex == 0 )
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{
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if( !lockEndpointA )
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{
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guideA[0] = guideA[1] = SEG( dragged.A,
|
|
dragged.A + drag_dir.Right().Right().ToVector() );
|
|
}
|
|
else
|
|
{
|
|
guideA[0] = SEG( dragged.A, dragged.A + drag_dir.Right().ToVector() );
|
|
guideA[1] = SEG( dragged.A, dragged.A + drag_dir.Left().ToVector() );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if( dir_prev.IsObtuse(drag_dir ) )
|
|
{
|
|
guideA[0] = SEG( s_prev.A, s_prev.A + drag_dir.Left().ToVector() );
|
|
guideA[1] = SEG( s_prev.A, s_prev.A + drag_dir.Right().ToVector() );
|
|
}
|
|
else
|
|
guideA[0] = guideA[1] = SEG( dragged.A, dragged.A + dir_prev.ToVector() );
|
|
}
|
|
|
|
if( aIndex == m_line.SegmentCount() - 1 )
|
|
{
|
|
if( !lockEndpointB )
|
|
{
|
|
guideB[0] = guideB[1] = SEG( dragged.B,
|
|
dragged.B + drag_dir.Right().Right().ToVector() );
|
|
}
|
|
else
|
|
{
|
|
guideB[0] = SEG( dragged.B, dragged.B + drag_dir.Right().ToVector() );
|
|
guideB[1] = SEG( dragged.B, dragged.B + drag_dir.Left().ToVector() );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if( dir_next.IsObtuse( drag_dir ) )
|
|
{
|
|
guideB[0] = SEG( s_next.B, s_next.B + drag_dir.Left().ToVector() );
|
|
guideB[1] = SEG( s_next.B, s_next.B + drag_dir.Right().ToVector() );
|
|
}
|
|
else
|
|
guideB[0] = guideB[1] = SEG( dragged.B, dragged.B + dir_next.ToVector() );
|
|
}
|
|
|
|
SEG s_current( target, target + drag_dir.ToVector() );
|
|
|
|
int best_len = INT_MAX;
|
|
SHAPE_LINE_CHAIN best;
|
|
|
|
for( int i = 0; i < 2; i++ )
|
|
{
|
|
for( int j = 0; j < 2; j++ )
|
|
{
|
|
OPT_VECTOR2I ip1 = s_current.IntersectLines( guideA[i] );
|
|
OPT_VECTOR2I ip2 = s_current.IntersectLines( guideB[j] );
|
|
|
|
SHAPE_LINE_CHAIN np;
|
|
|
|
if( !ip1 || !ip2 )
|
|
continue;
|
|
|
|
SEG s1( s_prev.A, *ip1 );
|
|
SEG s2( *ip1, *ip2 );
|
|
SEG s3( *ip2, s_next.B );
|
|
|
|
OPT_VECTOR2I ip;
|
|
|
|
if( (ip = s1.Intersect( s_next )) )
|
|
{
|
|
np.Append( s1.A );
|
|
np.Append( *ip );
|
|
np.Append( s_next.B );
|
|
}
|
|
else if( (ip = s3.Intersect( s_prev )) )
|
|
{
|
|
np.Append( s_prev.A );
|
|
np.Append( *ip );
|
|
np.Append( s3.B );
|
|
}
|
|
else if( (ip = s1.Intersect( s3 )) )
|
|
{
|
|
np.Append( s_prev.A );
|
|
np.Append( *ip );
|
|
np.Append( s_next.B );
|
|
}
|
|
else
|
|
{
|
|
np.Append( s_prev.A );
|
|
np.Append( *ip1 );
|
|
np.Append( *ip2 );
|
|
np.Append( s_next.B );
|
|
}
|
|
|
|
if( np.Length() < best_len )
|
|
{
|
|
best_len = np.Length();
|
|
best = np;
|
|
}
|
|
}
|
|
}
|
|
|
|
if( !lockEndpointA && aIndex == 0 )
|
|
best.Remove( 0, 0 );
|
|
if( !lockEndpointB && aIndex == m_line.SegmentCount() - 1 )
|
|
best.Remove( -1, -1 );
|
|
|
|
if( m_line.PointCount() == 1 )
|
|
m_line = best;
|
|
else if( aIndex == 0 )
|
|
m_line.Replace( 0, 1, best );
|
|
else if( aIndex == m_line.SegmentCount() - 1 )
|
|
m_line.Replace( -2, -1, best );
|
|
else
|
|
m_line.Replace( aIndex, aIndex + 1, best );
|
|
|
|
m_line.Simplify();
|
|
}
|
|
|
|
|
|
bool LINE::CompareGeometry( const LINE& aOther )
|
|
{
|
|
return m_line.CompareGeometry( aOther.m_line );
|
|
}
|
|
|
|
|
|
void LINE::Reverse()
|
|
{
|
|
m_line = m_line.Reverse();
|
|
|
|
std::reverse( m_segmentRefs.begin(), m_segmentRefs.end() );
|
|
}
|
|
|
|
|
|
void LINE::AppendVia( const VIA& aVia )
|
|
{
|
|
if( m_line.PointCount() > 1 && aVia.Pos() == m_line.CPoint( 0 ) )
|
|
{
|
|
Reverse();
|
|
}
|
|
|
|
m_hasVia = true;
|
|
m_via = aVia;
|
|
m_via.SetNet( m_net );
|
|
}
|
|
|
|
|
|
void LINE::SetRank( int aRank )
|
|
{
|
|
m_rank = aRank;
|
|
|
|
for( SEGMENT* s : m_segmentRefs )
|
|
s->SetRank( aRank );
|
|
|
|
}
|
|
|
|
|
|
int LINE::Rank() const
|
|
{
|
|
int min_rank = INT_MAX;
|
|
|
|
if( IsLinked() ) {
|
|
for( SEGMENT *s : m_segmentRefs )
|
|
{
|
|
min_rank = std::min( min_rank, s->Rank() );
|
|
}
|
|
} else {
|
|
min_rank = m_rank;
|
|
}
|
|
|
|
int rank = ( min_rank == INT_MAX ) ? -1 : min_rank;
|
|
|
|
return rank;
|
|
}
|
|
|
|
|
|
void LINE::ClipVertexRange( int aStart, int aEnd )
|
|
{
|
|
m_line = m_line.Slice( aStart, aEnd );
|
|
|
|
if( IsLinked() ) {
|
|
assert( m_segmentRefs.size() >= (aEnd - aStart) );
|
|
|
|
// Note: The range includes aEnd, but we have n-1 segments.
|
|
std::rotate(
|
|
m_segmentRefs.begin(),
|
|
m_segmentRefs.begin() + aStart,
|
|
m_segmentRefs.begin() + aEnd
|
|
);
|
|
|
|
m_segmentRefs.resize( aEnd - aStart );
|
|
}
|
|
}
|
|
|
|
|
|
bool LINE::HasLoops() const
|
|
{
|
|
for( int i = 0; i < PointCount(); i++ )
|
|
{
|
|
for( int j = 0; j < PointCount(); j++ )
|
|
{
|
|
if( ( std::abs( i - j ) > 1 ) && CPoint( i ) == CPoint( j ) )
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
void LINE::ClearSegmentLinks()
|
|
{
|
|
m_segmentRefs.clear();
|
|
}
|
|
|
|
|
|
static void extendBox( BOX2I& aBox, bool& aDefined, const VECTOR2I& aP )
|
|
{
|
|
if( aDefined )
|
|
{
|
|
aBox.Merge( aP );
|
|
}
|
|
else
|
|
{
|
|
aBox = BOX2I( aP, VECTOR2I( 0, 0 ) );
|
|
aDefined = true;
|
|
}
|
|
}
|
|
|
|
|
|
OPT_BOX2I LINE::ChangedArea( const LINE* aOther ) const
|
|
{
|
|
BOX2I area;
|
|
bool areaDefined = false;
|
|
|
|
int i_start = -1;
|
|
int i_end_self = -1, i_end_other = -1;
|
|
|
|
SHAPE_LINE_CHAIN self( m_line );
|
|
self.Simplify();
|
|
SHAPE_LINE_CHAIN other( aOther->m_line );
|
|
other.Simplify();
|
|
|
|
int np_self = self.PointCount();
|
|
int np_other = other.PointCount();
|
|
|
|
int n = std::min( np_self, np_other );
|
|
|
|
for( int i = 0; i < n; i++ )
|
|
{
|
|
const VECTOR2I p1 = self.CPoint( i );
|
|
const VECTOR2I p2 = other.CPoint( i );
|
|
|
|
if( p1 != p2 )
|
|
{
|
|
if( i != n - 1 )
|
|
{
|
|
SEG s = self.CSegment( i );
|
|
|
|
if( !s.Contains( p2 ) )
|
|
{
|
|
i_start = i;
|
|
break;
|
|
}
|
|
} else {
|
|
i_start = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
for( int i = 0; i < n; i++ )
|
|
{
|
|
const VECTOR2I p1 = self.CPoint( np_self - 1 - i );
|
|
const VECTOR2I p2 = other.CPoint( np_other - 1 - i );
|
|
|
|
if( p1 != p2 )
|
|
{
|
|
i_end_self = np_self - 1 - i;
|
|
i_end_other = np_other - 1 - i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if( i_start < 0 )
|
|
i_start = n;
|
|
|
|
if( i_end_self < 0 )
|
|
i_end_self = np_self - 1;
|
|
|
|
if( i_end_other < 0 )
|
|
i_end_other = np_other - 1;
|
|
|
|
for( int i = i_start; i <= i_end_self; i++ )
|
|
extendBox( area, areaDefined, self.CPoint( i ) );
|
|
|
|
for( int i = i_start; i <= i_end_other; i++ )
|
|
extendBox( area, areaDefined, other.CPoint( i ) );
|
|
|
|
if( areaDefined )
|
|
{
|
|
area.Inflate( std::max( Width(), aOther->Width() ) );
|
|
return area;
|
|
}
|
|
|
|
return OPT_BOX2I();
|
|
}
|
|
|
|
|
|
bool LINE::HasLockedSegments() const
|
|
{
|
|
for( const SEGMENT* seg : m_segmentRefs )
|
|
{
|
|
if( seg->Marker() & MK_LOCKED )
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
}
|