764 lines
20 KiB
C++
764 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 CERN
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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.or/licenses/>.
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*/
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#include <boost/foreach.hpp>
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#include <geometry/shape_line_chain.h>
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#include <geometry/shape_rect.h>
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#include "pns_line.h"
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#include "pns_node.h"
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#include "pns_optimizer.h"
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#include "pns_utils.h"
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using namespace std;
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/**
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*
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* Cost Estimator Methods
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*
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**/
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int PNS_COST_ESTIMATOR::CornerCost( const SEG& a, const SEG& b )
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{
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DIRECTION_45 dir_a( a ), dir_b( b );
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switch( dir_a.Angle( dir_b ) )
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{
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case DIRECTION_45::ANG_OBTUSE:
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return 1;
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case DIRECTION_45::ANG_STRAIGHT:
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return 0;
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case DIRECTION_45::ANG_ACUTE:
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return 50;
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case DIRECTION_45::ANG_RIGHT:
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return 30;
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case DIRECTION_45::ANG_HALF_FULL:
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return 60;
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default:
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return 100;
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}
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}
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int PNS_COST_ESTIMATOR::CornerCost( const SHAPE_LINE_CHAIN& aLine )
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{
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int total = 0;
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for( int i = 0; i < aLine.SegmentCount() - 1; ++i )
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total += CornerCost( aLine.CSegment( i ), aLine.CSegment( i + 1 ) );
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return total;
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}
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int PNS_COST_ESTIMATOR::CornerCost( const PNS_LINE& aLine )
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{
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return CornerCost( aLine.GetCLine() );
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}
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void PNS_COST_ESTIMATOR::Add( PNS_LINE& aLine )
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{
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m_lengthCost += aLine.GetCLine().Length();
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m_cornerCost += CornerCost( aLine );
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}
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void PNS_COST_ESTIMATOR::Remove( PNS_LINE& aLine )
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{
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m_lengthCost -= aLine.GetCLine().Length();
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m_cornerCost -= CornerCost( aLine );
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}
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void PNS_COST_ESTIMATOR::Replace( PNS_LINE& aOldLine, PNS_LINE& aNewLine )
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{
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m_lengthCost -= aOldLine.GetCLine().Length();
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m_cornerCost -= CornerCost( aOldLine );
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m_lengthCost += aNewLine.GetCLine().Length();
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m_cornerCost += CornerCost( aNewLine );
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}
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bool PNS_COST_ESTIMATOR::IsBetter( PNS_COST_ESTIMATOR& aOther,
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double aLengthTollerance,
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double aCornerTollerance ) const
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{
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if( aOther.m_cornerCost < m_cornerCost && aOther.m_lengthCost < m_lengthCost )
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return true;
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else if( aOther.m_cornerCost < m_cornerCost * aCornerTollerance && aOther.m_lengthCost <
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m_lengthCost * aLengthTollerance )
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return true;
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return false;
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}
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/**
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*
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* Optimizer
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*
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**/
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PNS_OPTIMIZER::PNS_OPTIMIZER( PNS_NODE* aWorld ) :
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m_world( aWorld ), m_collisionKindMask( PNS_ITEM::ANY ), m_effortLevel( MERGE_SEGMENTS )
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{
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// m_cache = new SHAPE_INDEX_LIST<PNS_ITEM*>();
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}
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PNS_OPTIMIZER::~PNS_OPTIMIZER()
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{
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// delete m_cache;
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}
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struct PNS_OPTIMIZER::CacheVisitor
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{
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CacheVisitor( const PNS_ITEM* aOurItem, PNS_NODE* aNode, int aMask ) :
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m_ourItem( aOurItem ),
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m_collidingItem( NULL ),
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m_node( aNode ),
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m_mask( aMask )
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{};
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bool operator()( PNS_ITEM* aOtherItem )
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{
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if( !m_mask & aOtherItem->GetKind() )
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return true;
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int clearance = m_node->GetClearance( aOtherItem, m_ourItem );
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if( !aOtherItem->Collide( m_ourItem, clearance ) )
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return true;
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m_collidingItem = aOtherItem;
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return false;
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}
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const PNS_ITEM* m_ourItem;
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PNS_ITEM* m_collidingItem;
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PNS_NODE* m_node;
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int m_mask;
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};
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void PNS_OPTIMIZER::cacheAdd( PNS_ITEM* aItem, bool aIsStatic = false )
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{
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if( m_cacheTags.find( aItem ) != m_cacheTags.end() )
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return;
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m_cache.Add( aItem );
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m_cacheTags[aItem].hits = 1;
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m_cacheTags[aItem].isStatic = aIsStatic;
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}
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void PNS_OPTIMIZER::removeCachedSegments( PNS_LINE* aLine, int aStartVertex, int aEndVertex )
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{
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std::vector<PNS_SEGMENT*>* segs = aLine->GetLinkedSegments();
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if( !segs )
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return;
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if( aEndVertex < 0 )
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aEndVertex += aLine->GetCLine().PointCount();
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for( int i = aStartVertex; i < aEndVertex - 1; i++ )
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{
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PNS_SEGMENT* s = (*segs)[i];
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m_cacheTags.erase( s );
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m_cache.Remove( s );
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} // *cacheRemove( (*segs)[i] );
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}
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void PNS_OPTIMIZER::CacheRemove( PNS_ITEM* aItem )
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{
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if( aItem->GetKind() == PNS_ITEM::LINE )
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removeCachedSegments( static_cast<PNS_LINE*> (aItem) );
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}
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void PNS_OPTIMIZER::CacheStaticItem( PNS_ITEM* aItem )
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{
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cacheAdd( aItem, true );
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}
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void PNS_OPTIMIZER::ClearCache( bool aStaticOnly )
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{
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if( !aStaticOnly )
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{
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m_cacheTags.clear();
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m_cache.Clear();
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return;
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}
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for( CachedItemTags::iterator i = m_cacheTags.begin(); i!= m_cacheTags.end(); ++i )
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{
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if( i->second.isStatic )
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{
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m_cache.Remove( i->first );
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m_cacheTags.erase( i->first );
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}
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}
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}
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bool PNS_OPTIMIZER::checkColliding( PNS_ITEM* aItem, bool aUpdateCache )
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{
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CacheVisitor v( aItem, m_world, m_collisionKindMask );
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return m_world->CheckColliding( aItem );
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// something is wrong with the cache, need to investigate.
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m_cache.Query( aItem->GetShape(), m_world->GetMaxClearance(), v, false );
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if( !v.m_collidingItem )
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{
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PNS_NODE::OptObstacle obs = m_world->CheckColliding( aItem );
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if( obs )
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{
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if( aUpdateCache )
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cacheAdd( obs->item );
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return true;
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}
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}
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else
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{
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m_cacheTags[v.m_collidingItem].hits++;
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return true;
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}
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return false;
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}
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bool PNS_OPTIMIZER::checkColliding( PNS_LINE* aLine, const SHAPE_LINE_CHAIN& aOptPath )
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{
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PNS_LINE tmp( *aLine, aOptPath );
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return checkColliding( &tmp );
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}
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bool PNS_OPTIMIZER::mergeObtuse( PNS_LINE* aLine )
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{
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SHAPE_LINE_CHAIN& line = aLine->GetLine();
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int step = line.PointCount() - 3;
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int iter = 0;
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int segs_pre = line.SegmentCount();
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if( step < 0 )
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return false;
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SHAPE_LINE_CHAIN current_path( line );
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while( 1 )
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{
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iter++;
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int n_segs = current_path.SegmentCount();
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int max_step = n_segs - 2;
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if( step > max_step )
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step = max_step;
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if( step < 2 )
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{
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line = current_path;
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return current_path.SegmentCount() < segs_pre;
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}
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bool found_anything = false;
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int n = 0;
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while( n < n_segs - step )
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{
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const SEG s1 = current_path.CSegment( n );
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const SEG s2 = current_path.CSegment( n + step );
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SEG s1opt, s2opt;
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if( DIRECTION_45( s1 ).IsObtuse( DIRECTION_45( s2 ) ) )
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{
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VECTOR2I ip = *s1.IntersectLines( s2 );
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if( s1.Distance( ip ) <= 1 || s2.Distance( ip ) <= 1 )
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{
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s1opt = SEG( s1.A, ip );
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s2opt = SEG( ip, s2.B );
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}
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else
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{
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s1opt = SEG( s1.A, ip );
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s2opt = SEG( ip, s2.B );
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}
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if( DIRECTION_45( s1opt ).IsObtuse( DIRECTION_45( s2opt ) ) )
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{
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SHAPE_LINE_CHAIN opt_path;
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opt_path.Append( s1opt.A );
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opt_path.Append( s1opt.B );
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opt_path.Append( s2opt.B );
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PNS_LINE opt_track( *aLine, opt_path );
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if( !checkColliding( &opt_track ) )
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{
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current_path.Replace( s1.Index() + 1, s2.Index(), ip );
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// removeCachedSegments(aLine, s1.Index(), s2.Index());
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n_segs = current_path.SegmentCount();
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found_anything = true;
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break;
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}
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}
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}
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n++;
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}
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if( !found_anything )
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{
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if( step <= 2 )
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{
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line = current_path;
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return line.SegmentCount() < segs_pre;
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}
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step--;
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}
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}
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return line.SegmentCount() < segs_pre;
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}
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bool PNS_OPTIMIZER::mergeFull( PNS_LINE* aLine )
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{
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SHAPE_LINE_CHAIN& line = aLine->GetLine();
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int step = line.SegmentCount() - 1;
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int segs_pre = line.SegmentCount();
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line.Simplify();
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if( step < 0 )
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return false;
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SHAPE_LINE_CHAIN current_path( line );
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while( 1 )
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{
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int n_segs = current_path.SegmentCount();
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int max_step = n_segs - 2;
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if( step > max_step )
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step = max_step;
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if( step < 1 )
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break;
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bool found_anything = mergeStep( aLine, current_path, step );
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if( !found_anything )
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step--;
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}
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aLine->SetShape( current_path );
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return current_path.SegmentCount() < segs_pre;
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}
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bool PNS_OPTIMIZER::Optimize( PNS_LINE* aLine, PNS_LINE* aResult, int aStartVertex, int aEndVertex )
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{
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if( !aResult )
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aResult = aLine;
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else
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*aResult = *aLine;
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m_keepPostures = false;
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bool rv = false;
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if( m_effortLevel & MERGE_SEGMENTS )
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rv |= mergeFull( aResult );
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if( m_effortLevel & MERGE_OBTUSE )
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rv |= mergeObtuse( aResult );
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if( m_effortLevel & SMART_PADS )
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rv |= runSmartPads( aResult );
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return rv;
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}
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bool PNS_OPTIMIZER::mergeStep( PNS_LINE* aLine, SHAPE_LINE_CHAIN& aCurrentPath, int step )
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{
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int n = 0;
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int n_segs = aCurrentPath.SegmentCount();
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int cost_orig = PNS_COST_ESTIMATOR::CornerCost( aCurrentPath );
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if( aLine->GetCLine().SegmentCount() < 4 )
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return false;
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DIRECTION_45 orig_start( aLine->GetCLine().CSegment( 0 ) );
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DIRECTION_45 orig_end( aLine->GetCLine().CSegment( -1 ) );
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while( n < n_segs - step )
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{
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const SEG s1 = aCurrentPath.CSegment( n );
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const SEG s2 = aCurrentPath.CSegment( n + step );
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SHAPE_LINE_CHAIN path[2], * picked = NULL;
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int cost[2];
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for( int i = 0; i < 2; i++ )
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{
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bool postureMatch = true;
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SHAPE_LINE_CHAIN bypass = DIRECTION_45().BuildInitialTrace( s1.A, s2.B, i );
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cost[i] = INT_MAX;
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if( n == 0 && orig_start != DIRECTION_45( bypass.CSegment( 0 ) ) )
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postureMatch = false;
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else if( n == n_segs - step && orig_end != DIRECTION_45( bypass.CSegment( -1 ) ) )
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postureMatch = false;
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if( (postureMatch || !m_keepPostures) && !checkColliding( aLine, bypass ) )
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{
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path[i] = aCurrentPath;
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path[i].Replace( s1.Index(), s2.Index(), bypass );
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path[i].Simplify();
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cost[i] = PNS_COST_ESTIMATOR::CornerCost( path[i] );
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}
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}
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if( cost[0] < cost_orig && cost[0] < cost[1] )
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picked = &path[0];
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else if( cost[1] < cost_orig )
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picked = &path[1];
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if( picked )
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{
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n_segs = aCurrentPath.SegmentCount();
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aCurrentPath = *picked;
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return true;
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}
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n++;
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}
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return false;
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}
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PNS_OPTIMIZER::BreakoutList PNS_OPTIMIZER::circleBreakouts( int aWidth,
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const SHAPE* aShape, bool aPermitDiagonal ) const
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{
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BreakoutList breakouts;
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for( int angle = 0; angle < 360; angle += 45 )
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{
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const SHAPE_CIRCLE* cir = static_cast<const SHAPE_CIRCLE*>( aShape );
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SHAPE_LINE_CHAIN l;
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VECTOR2I p0 = cir->GetCenter();
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VECTOR2I v0( cir->GetRadius() * M_SQRT2, 0 );
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l.Append( p0 );
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l.Append( p0 + v0.Rotate( angle * M_PI / 180.0 ) );
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breakouts.push_back( l );
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}
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return breakouts;
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}
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PNS_OPTIMIZER::BreakoutList PNS_OPTIMIZER::rectBreakouts( int aWidth,
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const SHAPE* aShape, bool aPermitDiagonal ) const
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{
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const SHAPE_RECT* rect = static_cast<const SHAPE_RECT*>(aShape);
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VECTOR2I s = rect->GetSize(), c = rect->GetPosition() + VECTOR2I( s.x / 2, s.y / 2 );
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BreakoutList breakouts;
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VECTOR2I d_offset;
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d_offset.x = ( s.x > s.y ) ? ( s.x - s.y ) / 2 : 0;
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d_offset.y = ( s.x < s.y ) ? ( s.y - s.x ) / 2 : 0;
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VECTOR2I d_vert = VECTOR2I( 0, s.y / 2 + aWidth );
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VECTOR2I d_horiz = VECTOR2I( s.x / 2 + aWidth, 0 );
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breakouts.push_back( SHAPE_LINE_CHAIN( c, c + d_horiz ) );
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breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_horiz ) );
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breakouts.push_back( SHAPE_LINE_CHAIN( c, c + d_vert ) );
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breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_vert ) );
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if( aPermitDiagonal )
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{
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int l = aWidth + std::min( s.x, s.y ) / 2;
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VECTOR2I d_diag;
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if( s.x >= s.y )
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{
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breakouts.push_back( SHAPE_LINE_CHAIN( c, c + d_offset,
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c + d_offset + VECTOR2I( l, l ) ) );
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breakouts.push_back( SHAPE_LINE_CHAIN( c, c + d_offset,
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c + d_offset - VECTOR2I( -l, l ) ) );
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breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_offset,
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c - d_offset + VECTOR2I( -l, l ) ) );
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breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_offset,
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c - d_offset - VECTOR2I( l, l ) ) );
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}
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else
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{
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// fixme: this could be done more efficiently
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breakouts.push_back( SHAPE_LINE_CHAIN( c, c + d_offset,
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c + d_offset + VECTOR2I( l, l ) ) );
|
|
breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_offset,
|
|
c - d_offset - VECTOR2I( -l, l ) ) );
|
|
breakouts.push_back( SHAPE_LINE_CHAIN( c, c + d_offset,
|
|
c + d_offset + VECTOR2I( -l, l ) ) );
|
|
breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_offset,
|
|
c - d_offset - VECTOR2I( l, l ) ) );
|
|
}
|
|
}
|
|
|
|
return breakouts;
|
|
}
|
|
|
|
|
|
PNS_OPTIMIZER::BreakoutList PNS_OPTIMIZER::computeBreakouts( int aWidth,
|
|
const PNS_ITEM* aItem, bool aPermitDiagonal ) const
|
|
{
|
|
switch( aItem->GetKind() )
|
|
{
|
|
case PNS_ITEM::VIA:
|
|
{
|
|
const PNS_VIA* via = static_cast<const PNS_VIA*>( aItem );
|
|
return circleBreakouts( aWidth, via->GetShape(), aPermitDiagonal );
|
|
}
|
|
|
|
case PNS_ITEM::SOLID:
|
|
{
|
|
const SHAPE* shape = aItem->GetShape();
|
|
|
|
switch( shape->Type() )
|
|
{
|
|
case SH_RECT:
|
|
return rectBreakouts( aWidth, shape, aPermitDiagonal );
|
|
|
|
case SH_CIRCLE:
|
|
return circleBreakouts( aWidth, shape, aPermitDiagonal );
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return BreakoutList();
|
|
}
|
|
|
|
|
|
PNS_ITEM* PNS_OPTIMIZER::findPadOrVia( int aLayer, int aNet, const VECTOR2I& aP ) const
|
|
{
|
|
PNS_NODE::OptJoint jt = m_world->FindJoint( aP, aLayer, aNet );
|
|
|
|
if( !jt )
|
|
return NULL;
|
|
|
|
BOOST_FOREACH( PNS_ITEM* item, jt->GetLinkList() )
|
|
{
|
|
if( item->GetKind() == PNS_ITEM::VIA || item->GetKind() == PNS_ITEM::SOLID )
|
|
return item;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
int PNS_OPTIMIZER::smartPadsSingle( PNS_LINE* aLine, PNS_ITEM* aPad, bool aEnd, int aEndVertex )
|
|
{
|
|
int min_cost = INT_MAX; // PNS_COST_ESTIMATOR::CornerCost( line );
|
|
int min_len = INT_MAX;
|
|
DIRECTION_45 dir;
|
|
|
|
const int ForbiddenAngles = DIRECTION_45::ANG_ACUTE | DIRECTION_45::ANG_RIGHT |
|
|
DIRECTION_45::ANG_HALF_FULL | DIRECTION_45::ANG_UNDEFINED;
|
|
|
|
typedef pair<int, SHAPE_LINE_CHAIN> RtVariant;
|
|
vector<RtVariant> variants;
|
|
|
|
BreakoutList breakouts = computeBreakouts( aLine->GetWidth(), aPad, true );
|
|
|
|
SHAPE_LINE_CHAIN line = ( aEnd ? aLine->GetCLine().Reverse() : aLine->GetCLine() );
|
|
|
|
// bool startDiagonal = DIRECTION_45( line.CSegment(0) ).IsDiagonal();
|
|
|
|
int p_end = min( aEndVertex, min( 3, line.PointCount() - 1 ) );
|
|
|
|
for( int p = 1; p <= p_end; p++ )
|
|
{
|
|
BOOST_FOREACH( SHAPE_LINE_CHAIN & l, breakouts ) {
|
|
// PNSDisplayDebugLine (l, 0);
|
|
|
|
|
|
for( int diag = 0; diag < 2; diag++ )
|
|
{
|
|
SHAPE_LINE_CHAIN v;
|
|
SHAPE_LINE_CHAIN connect = dir.BuildInitialTrace( l.CPoint( -1 ),
|
|
line.CPoint( p ), diag == 0 );
|
|
|
|
DIRECTION_45 dir_bkout( l.CSegment( -1 ) );
|
|
// DIRECTION_45 dir_head ( line.CSegment(p + 1));
|
|
|
|
int ang1 = dir_bkout.Angle( DIRECTION_45( connect.CSegment( 0 ) ) );
|
|
int ang2 = 0;
|
|
// int ang2 = dir_head.Angle ( DIRECTION_45(connect.CSegment(-1) ));
|
|
|
|
if( (ang1 | ang2) & ForbiddenAngles )
|
|
continue;
|
|
|
|
if( l.Length() > line.Length() )
|
|
continue;
|
|
|
|
v = l;
|
|
|
|
v.Append( connect );
|
|
|
|
for( int i = p + 1; i < line.PointCount(); i++ )
|
|
v.Append( line.CPoint( i ) );
|
|
|
|
PNS_LINE tmp( *aLine, v );
|
|
// tmp.GetLine().Simplify();
|
|
int cc = tmp.CountCorners( ForbiddenAngles );
|
|
|
|
if( cc == 0 )
|
|
{
|
|
RtVariant vp;
|
|
vp.first = p;
|
|
vp.second = aEnd ? v.Reverse() : v;
|
|
vp.second.Simplify();
|
|
variants.push_back( vp );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
SHAPE_LINE_CHAIN l_best;
|
|
bool found = false;
|
|
int p_best = -1;
|
|
|
|
BOOST_FOREACH( RtVariant& vp, variants )
|
|
{
|
|
PNS_LINE tmp( *aLine, vp.second );
|
|
int cost = PNS_COST_ESTIMATOR::CornerCost( vp.second );
|
|
int len = vp.second.Length();
|
|
|
|
if( !checkColliding( &tmp ) )
|
|
{
|
|
/* if(aEnd)
|
|
* PNSDisplayDebugLine (l_best, 6);
|
|
* else
|
|
* PNSDisplayDebugLine (l_best, 5);*/
|
|
|
|
if( cost < min_cost || ( cost == min_cost && len < min_len ) )
|
|
{
|
|
l_best = vp.second;
|
|
p_best = vp.first;
|
|
found = true;
|
|
|
|
// if(cost == min_cost)
|
|
if( cost == min_cost )
|
|
min_len = std::min( len, min_len );
|
|
|
|
min_cost = std::min( cost, min_cost );
|
|
}
|
|
}
|
|
}
|
|
|
|
if( found )
|
|
{
|
|
// printf("end: %d, p-best: %d, p-end: %d, p-total: %d\n", aEnd, p_best, p_end, l_best.PointCount());
|
|
|
|
// if(!aEnd)
|
|
// PNSDisplayDebugLine (l_best, 5);
|
|
// else
|
|
|
|
aLine->SetShape( l_best );
|
|
return p_best;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
bool PNS_OPTIMIZER::runSmartPads( PNS_LINE* aLine )
|
|
{
|
|
SHAPE_LINE_CHAIN& line = aLine->GetLine();
|
|
|
|
if( line.PointCount() < 3 )
|
|
return false;
|
|
|
|
VECTOR2I p_start = line.CPoint( 0 ), p_end = line.CPoint( -1 );
|
|
|
|
PNS_ITEM* startPad = findPadOrVia( aLine->GetLayer(), aLine->GetNet(), p_start );
|
|
PNS_ITEM* endPad = findPadOrVia( aLine->GetLayer(), aLine->GetNet(), p_end );
|
|
|
|
int vtx = -1;
|
|
|
|
if( startPad )
|
|
vtx = smartPadsSingle( aLine, startPad, false, 3 );
|
|
|
|
if( endPad )
|
|
smartPadsSingle( aLine, endPad, true,
|
|
vtx < 0 ? line.PointCount() - 1 : line.PointCount() - 1 - vtx );
|
|
|
|
aLine->GetLine().Simplify();
|
|
return true;
|
|
}
|
|
|
|
|
|
bool PNS_OPTIMIZER::Optimize( PNS_LINE* aLine, int aEffortLevel, PNS_NODE* aWorld )
|
|
{
|
|
PNS_OPTIMIZER opt( aWorld ? aWorld : aLine->GetWorld() );
|
|
|
|
opt.SetEffortLevel( aEffortLevel );
|
|
opt.SetCollisionMask( -1 );
|
|
return opt.Optimize( aLine );
|
|
}
|