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kicad/pcbnew/router/pns_optimizer.cpp

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/*
* KiRouter - a push-and-(sometimes-)shove PCB router
*
* Copyright (C) 2013-2014 CERN
* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <boost/foreach.hpp>
#include <geometry/shape_line_chain.h>
#include <geometry/shape_rect.h>
#include <geometry/shape_convex.h>
#include "pns_line.h"
#include "pns_diff_pair.h"
#include "pns_node.h"
#include "pns_solid.h"
#include "pns_optimizer.h"
#include "pns_utils.h"
#include "pns_router.h"
/**
* Cost Estimator Methods
*/
int PNS_COST_ESTIMATOR::CornerCost( const SEG& aA, const SEG& aB )
{
DIRECTION_45 dir_a( aA ), dir_b( aB );
switch( dir_a.Angle( dir_b ) )
{
case DIRECTION_45::ANG_OBTUSE:
return 1;
case DIRECTION_45::ANG_STRAIGHT:
return 0;
case DIRECTION_45::ANG_ACUTE:
return 50;
case DIRECTION_45::ANG_RIGHT:
return 30;
case DIRECTION_45::ANG_HALF_FULL:
return 60;
default:
return 100;
}
}
int PNS_COST_ESTIMATOR::CornerCost( const SHAPE_LINE_CHAIN& aLine )
{
int total = 0;
for( int i = 0; i < aLine.SegmentCount() - 1; ++i )
total += CornerCost( aLine.CSegment( i ), aLine.CSegment( i + 1 ) );
return total;
}
int PNS_COST_ESTIMATOR::CornerCost( const PNS_LINE& aLine )
{
return CornerCost( aLine.CLine() );
}
void PNS_COST_ESTIMATOR::Add( PNS_LINE& aLine )
{
m_lengthCost += aLine.CLine().Length();
m_cornerCost += CornerCost( aLine );
}
void PNS_COST_ESTIMATOR::Remove( PNS_LINE& aLine )
{
m_lengthCost -= aLine.CLine().Length();
m_cornerCost -= CornerCost( aLine );
}
void PNS_COST_ESTIMATOR::Replace( PNS_LINE& aOldLine, PNS_LINE& aNewLine )
{
m_lengthCost -= aOldLine.CLine().Length();
m_cornerCost -= CornerCost( aOldLine );
m_lengthCost += aNewLine.CLine().Length();
m_cornerCost += CornerCost( aNewLine );
}
bool PNS_COST_ESTIMATOR::IsBetter( PNS_COST_ESTIMATOR& aOther,
double aLengthTolerance,
double aCornerTolerance ) const
{
if( aOther.m_cornerCost < m_cornerCost && aOther.m_lengthCost < m_lengthCost )
return true;
else if( aOther.m_cornerCost < m_cornerCost * aCornerTolerance &&
aOther.m_lengthCost < m_lengthCost * aLengthTolerance )
return true;
return false;
}
/**
* Optimizer
**/
PNS_OPTIMIZER::PNS_OPTIMIZER( PNS_NODE* aWorld ) :
m_world( aWorld ),
m_collisionKindMask( PNS_ITEM::ANY ),
m_effortLevel( MERGE_SEGMENTS ),
m_keepPostures( false ),
m_restrictAreaActive( false )
{
}
PNS_OPTIMIZER::~PNS_OPTIMIZER()
{
}
struct PNS_OPTIMIZER::CACHE_VISITOR
{
CACHE_VISITOR( const PNS_ITEM* aOurItem, PNS_NODE* aNode, int aMask ) :
m_ourItem( aOurItem ),
m_collidingItem( NULL ),
m_node( aNode ),
m_mask( aMask )
{}
bool operator()( PNS_ITEM* aOtherItem )
{
if( !( m_mask & aOtherItem->Kind() ) )
return true;
int clearance = m_node->GetClearance( aOtherItem, m_ourItem );
if( !aOtherItem->Collide( m_ourItem, clearance ) )
return true;
m_collidingItem = aOtherItem;
return false;
}
const PNS_ITEM* m_ourItem;
PNS_ITEM* m_collidingItem;
PNS_NODE* m_node;
int m_mask;
};
void PNS_OPTIMIZER::cacheAdd( PNS_ITEM* aItem, bool aIsStatic = false )
{
if( m_cacheTags.find( aItem ) != m_cacheTags.end() )
return;
m_cache.Add( aItem );
m_cacheTags[aItem].m_hits = 1;
m_cacheTags[aItem].m_isStatic = aIsStatic;
}
void PNS_OPTIMIZER::removeCachedSegments( PNS_LINE* aLine, int aStartVertex, int aEndVertex )
{
PNS_LINE::SEGMENT_REFS* segs = aLine->LinkedSegments();
if( !segs )
return;
if( aEndVertex < 0 )
aEndVertex += aLine->PointCount();
for( int i = aStartVertex; i < aEndVertex - 1; i++ )
{
PNS_SEGMENT* s = (*segs)[i];
m_cacheTags.erase( s );
m_cache.Remove( s );
}
}
void PNS_OPTIMIZER::CacheRemove( PNS_ITEM* aItem )
{
if( aItem->Kind() == PNS_ITEM::LINE )
removeCachedSegments( static_cast<PNS_LINE*>( aItem ) );
}
void PNS_OPTIMIZER::CacheStaticItem( PNS_ITEM* aItem )
{
cacheAdd( aItem, true );
}
void PNS_OPTIMIZER::ClearCache( bool aStaticOnly )
{
if( !aStaticOnly )
{
m_cacheTags.clear();
m_cache.Clear();
return;
}
for( CachedItemTags::iterator i = m_cacheTags.begin(); i!= m_cacheTags.end(); ++i )
{
if( i->second.m_isStatic )
{
m_cache.Remove( i->first );
m_cacheTags.erase( i->first );
}
}
}
class LINE_RESTRICTIONS
{
public:
LINE_RESTRICTIONS() {};
~LINE_RESTRICTIONS() {};
void Build( PNS_NODE* aWorld, PNS_LINE* aOriginLine, const SHAPE_LINE_CHAIN& aLine, const BOX2I& aRestrictedArea, bool aRestrictedAreaEnable );
bool Check ( int aVertex1, int aVertex2, const SHAPE_LINE_CHAIN& aReplacement );
void Dump();
private:
int allowedAngles( PNS_NODE* aWorld, const PNS_LINE* aLine, const VECTOR2I& aP, bool aFirst );
struct RVERTEX
{
RVERTEX ( bool aRestricted, int aAllowedAngles ) :
restricted( aRestricted ),
allowedAngles( aAllowedAngles )
{
}
bool restricted;
int allowedAngles;
};
std::vector<RVERTEX> m_rs;
};
// fixme: use later
int LINE_RESTRICTIONS::allowedAngles( PNS_NODE* aWorld, const PNS_LINE* aLine, const VECTOR2I& aP, bool aFirst )
{
PNS_JOINT* jt = aWorld->FindJoint( aP , aLine );
if( !jt )
return 0xff;
DIRECTION_45 dirs [8];
int n_dirs = 0;
BOOST_FOREACH( const PNS_ITEM* item, jt->Links().CItems() )
{
if( item->OfKind( PNS_ITEM::VIA ) || item->OfKind( PNS_ITEM::SOLID ) )
return 0xff;
else if( const PNS_SEGMENT* seg = dyn_cast<const PNS_SEGMENT*>( item ) )
{
SEG s = seg->Seg();
if( s.A != aP )
s.Reverse();
if( n_dirs < 8 )
dirs[n_dirs++] = aFirst ? DIRECTION_45( s ) : DIRECTION_45( s ).Opposite();
}
}
const int angleMask = DIRECTION_45::ANG_OBTUSE | DIRECTION_45::ANG_HALF_FULL | DIRECTION_45::ANG_STRAIGHT;
int outputMask = 0xff;
for( int d = 0; d < 8; d++ )
{
DIRECTION_45 refDir( ( DIRECTION_45::Directions ) d );
for( int i = 0; i < n_dirs; i++ )
{
if( !( refDir.Angle( dirs[i] ) & angleMask ) )
outputMask &= ~refDir.Mask();
}
}
DrawDebugDirs( aP, outputMask, 3 );
return 0xff;
}
void LINE_RESTRICTIONS::Build( PNS_NODE* aWorld, PNS_LINE* aOriginLine, const SHAPE_LINE_CHAIN& aLine, const BOX2I& aRestrictedArea, bool aRestrictedAreaEnable )
{
const SHAPE_LINE_CHAIN& l = aLine;
VECTOR2I v_prev;
int n = l.PointCount( );
m_rs.reserve( n );
for( int i = 0; i < n; i++ )
{
const VECTOR2I &v = l.CPoint( i ), v_next;
RVERTEX r( false, 0xff );
if( aRestrictedAreaEnable )
{
bool exiting = ( i > 0 && aRestrictedArea.Contains( v_prev ) && !aRestrictedArea.Contains( v ) );
bool entering = false;
if( i != l.PointCount() - 1 )
{
const VECTOR2I& v_next = l.CPoint( i + 1 );
entering = ( !aRestrictedArea.Contains( v ) && aRestrictedArea.Contains( v_next ) );
}
if( entering )
{
const SEG& sp = l.CSegment( i );
r.allowedAngles = DIRECTION_45( sp ).Mask();
}
else if( exiting )
{
const SEG& sp = l.CSegment( i - 1 );
r.allowedAngles = DIRECTION_45( sp ).Mask();
}
else
{
r.allowedAngles = ( !aRestrictedArea.Contains( v ) ) ? 0 : 0xff;
r.restricted = r.allowedAngles ? false : true;
}
}
v_prev = v;
m_rs.push_back( r );
}
}
void LINE_RESTRICTIONS::Dump()
{
}
bool LINE_RESTRICTIONS::Check( int aVertex1, int aVertex2, const SHAPE_LINE_CHAIN& aReplacement )
{
if( m_rs.empty( ) )
return true;
for( int i = aVertex1; i <= aVertex2; i++ )
if ( m_rs[i].restricted )
return false;
const RVERTEX& v1 = m_rs[ aVertex1 ];
const RVERTEX& v2 = m_rs[ aVertex2 ];
int m1 = DIRECTION_45( aReplacement.CSegment( 0 ) ).Mask();
int m2;
if( aReplacement.SegmentCount() == 1 )
m2 = m1;
else
m2 = DIRECTION_45( aReplacement.CSegment( 1 ) ).Mask();
return ( ( v1.allowedAngles & m1 ) != 0 ) &&
( ( v2.allowedAngles & m2 ) != 0 );
}
bool PNS_OPTIMIZER::checkColliding( PNS_ITEM* aItem, bool aUpdateCache )
{
CACHE_VISITOR v( aItem, m_world, m_collisionKindMask );
return static_cast<bool>( m_world->CheckColliding( aItem ) );
// something is wrong with the cache, need to investigate.
m_cache.Query( aItem->Shape(), m_world->GetMaxClearance(), v, false );
if( !v.m_collidingItem )
{
PNS_NODE::OPT_OBSTACLE obs = m_world->CheckColliding( aItem );
if( obs )
{
if( aUpdateCache )
cacheAdd( obs->m_item );
return true;
}
}
else
{
m_cacheTags[v.m_collidingItem].m_hits++;
return true;
}
return false;
}
bool PNS_OPTIMIZER::checkColliding( PNS_LINE* aLine, const SHAPE_LINE_CHAIN& aOptPath )
{
PNS_LINE tmp( *aLine, aOptPath );
return checkColliding( &tmp );
}
bool PNS_OPTIMIZER::mergeObtuse( PNS_LINE* aLine )
{
SHAPE_LINE_CHAIN& line = aLine->Line();
int step = line.PointCount() - 3;
int iter = 0;
int segs_pre = line.SegmentCount();
if( step < 0 )
return false;
SHAPE_LINE_CHAIN current_path( line );
while( 1 )
{
iter++;
int n_segs = current_path.SegmentCount();
int max_step = n_segs - 2;
if( step > max_step )
step = max_step;
if( step < 2 )
{
line = current_path;
return current_path.SegmentCount() < segs_pre;
}
bool found_anything = false;
int n = 0;
while( n < n_segs - step )
{
const SEG s1 = current_path.CSegment( n );
const SEG s2 = current_path.CSegment( n + step );
SEG s1opt, s2opt;
if( DIRECTION_45( s1 ).IsObtuse( DIRECTION_45( s2 ) ) )
{
VECTOR2I ip = *s1.IntersectLines( s2 );
if( s1.Distance( ip ) <= 1 || s2.Distance( ip ) <= 1 )
{
s1opt = SEG( s1.A, ip );
s2opt = SEG( ip, s2.B );
}
else
{
s1opt = SEG( s1.A, ip );
s2opt = SEG( ip, s2.B );
}
if( DIRECTION_45( s1opt ).IsObtuse( DIRECTION_45( s2opt ) ) )
{
SHAPE_LINE_CHAIN opt_path;
opt_path.Append( s1opt.A );
opt_path.Append( s1opt.B );
opt_path.Append( s2opt.B );
PNS_LINE opt_track( *aLine, opt_path );
if( !checkColliding( &opt_track ) )
{
current_path.Replace( s1.Index() + 1, s2.Index(), ip );
// removeCachedSegments(aLine, s1.Index(), s2.Index());
n_segs = current_path.SegmentCount();
found_anything = true;
break;
}
}
}
n++;
}
if( !found_anything )
{
if( step <= 2 )
{
line = current_path;
return line.SegmentCount() < segs_pre;
}
step--;
}
}
return line.SegmentCount() < segs_pre;
}
bool PNS_OPTIMIZER::mergeFull( PNS_LINE* aLine )
{
SHAPE_LINE_CHAIN& line = aLine->Line();
int step = line.SegmentCount() - 1;
int segs_pre = line.SegmentCount();
line.Simplify();
if( step < 0 )
return false;
SHAPE_LINE_CHAIN current_path( line );
while( 1 )
{
int n_segs = current_path.SegmentCount();
int max_step = n_segs - 2;
if( step > max_step )
step = max_step;
if( step < 1 )
break;
bool found_anything = mergeStep( aLine, current_path, step );
if( !found_anything )
step--;
}
aLine->SetShape( current_path );
return current_path.SegmentCount() < segs_pre;
}
bool PNS_OPTIMIZER::Optimize( PNS_LINE* aLine, PNS_LINE* aResult )
{
if( !aResult )
aResult = aLine;
else
*aResult = *aLine;
m_keepPostures = false;
bool rv = false;
if( m_effortLevel & MERGE_SEGMENTS )
rv |= mergeFull( aResult );
if( m_effortLevel & MERGE_OBTUSE )
rv |= mergeObtuse( aResult );
if( m_effortLevel & SMART_PADS )
rv |= runSmartPads( aResult );
if( m_effortLevel & FANOUT_CLEANUP )
rv |= fanoutCleanup( aResult );
return rv;
}
bool PNS_OPTIMIZER::mergeStep( PNS_LINE* aLine, SHAPE_LINE_CHAIN& aCurrentPath, int step )
{
int n = 0;
int n_segs = aCurrentPath.SegmentCount();
int cost_orig = PNS_COST_ESTIMATOR::CornerCost( aCurrentPath );
LINE_RESTRICTIONS restr;
if( aLine->SegmentCount() < 4 )
return false;
DIRECTION_45 orig_start( aLine->CSegment( 0 ) );
DIRECTION_45 orig_end( aLine->CSegment( -1 ) );
restr.Build( m_world, aLine, aCurrentPath, m_restrictArea, m_restrictAreaActive );
while( n < n_segs - step )
{
const SEG s1 = aCurrentPath.CSegment( n );
const SEG s2 = aCurrentPath.CSegment( n + step );
SHAPE_LINE_CHAIN path[2];
SHAPE_LINE_CHAIN* picked = NULL;
int cost[2];
for( int i = 0; i < 2; i++ )
{
bool postureMatch = true;
SHAPE_LINE_CHAIN bypass = DIRECTION_45().BuildInitialTrace( s1.A, s2.B, i );
cost[i] = INT_MAX;
bool restrictionsOK = restr.Check ( n, n + step + 1, bypass );
if( n == 0 && orig_start != DIRECTION_45( bypass.CSegment( 0 ) ) )
postureMatch = false;
else if( n == n_segs - step && orig_end != DIRECTION_45( bypass.CSegment( -1 ) ) )
postureMatch = false;
if( restrictionsOK && (postureMatch || !m_keepPostures) && !checkColliding( aLine, bypass ) )
{
path[i] = aCurrentPath;
path[i].Replace( s1.Index(), s2.Index(), bypass );
path[i].Simplify();
cost[i] = PNS_COST_ESTIMATOR::CornerCost( path[i] );
}
}
if( cost[0] < cost_orig && cost[0] < cost[1] )
picked = &path[0];
else if( cost[1] < cost_orig )
picked = &path[1];
if( picked )
{
n_segs = aCurrentPath.SegmentCount();
aCurrentPath = *picked;
return true;
}
n++;
}
return false;
}
PNS_OPTIMIZER::BREAKOUT_LIST PNS_OPTIMIZER::circleBreakouts( int aWidth,
const SHAPE* aShape, bool aPermitDiagonal ) const
{
BREAKOUT_LIST breakouts;
for( int angle = 0; angle < 360; angle += 45 )
{
const SHAPE_CIRCLE* cir = static_cast<const SHAPE_CIRCLE*>( aShape );
SHAPE_LINE_CHAIN l;
VECTOR2I p0 = cir->GetCenter();
VECTOR2I v0( cir->GetRadius() * M_SQRT2, 0 );
l.Append( p0 );
l.Append( p0 + v0.Rotate( angle * M_PI / 180.0 ) );
breakouts.push_back( l );
}
return breakouts;
}
PNS_OPTIMIZER::BREAKOUT_LIST PNS_OPTIMIZER::convexBreakouts( int aWidth,
const SHAPE* aShape, bool aPermitDiagonal ) const
{
BREAKOUT_LIST breakouts;
const SHAPE_CONVEX* convex = static_cast<const SHAPE_CONVEX*>( aShape );
BOX2I bbox = convex->BBox( 0 );
VECTOR2I p0 = bbox.Centre();
// must be large enough to guarantee intersecting the convex polygon
int length = bbox.GetSize().EuclideanNorm() / 2 + 5;
for( int angle = 0; angle < 360; angle += ( aPermitDiagonal ? 45 : 90 ) )
{
SHAPE_LINE_CHAIN l;
VECTOR2I v0( p0 + VECTOR2I( length, 0 ).Rotate( angle * M_PI / 180.0 ) );
SHAPE_LINE_CHAIN::INTERSECTIONS intersections;
int n = convex->Vertices().Intersect( SEG( p0, v0 ), intersections );
// if n == 1 intersected a segment
// if n == 2 intersected the common point of 2 segments
// n == 0 can not happen I think, but...
if( n > 0 )
{
l.Append( p0 );
// for a breakout distance relative to the distance between
// center and polygon edge
//l.Append( intersections[0].p + (v0 - p0).Resize( (intersections[0].p - p0).EuclideanNorm() * 0.4 ) );
// for an absolute breakout distance, e.g. 0.1 mm
l.Append( intersections[0].p + (v0 - p0).Resize( 100000 ) );
// for the breakout right on the polygon edge
//l.Append( intersections[0].p );
breakouts.push_back( l );
}
}
return breakouts;
}
PNS_OPTIMIZER::BREAKOUT_LIST PNS_OPTIMIZER::rectBreakouts( int aWidth,
const SHAPE* aShape, bool aPermitDiagonal ) const
{
const SHAPE_RECT* rect = static_cast<const SHAPE_RECT*>(aShape);
VECTOR2I s = rect->GetSize(), c = rect->GetPosition() + VECTOR2I( s.x / 2, s.y / 2 );
BREAKOUT_LIST breakouts;
VECTOR2I d_offset;
d_offset.x = ( s.x > s.y ) ? ( s.x - s.y ) / 2 : 0;
d_offset.y = ( s.x < s.y ) ? ( s.y - s.x ) / 2 : 0;
VECTOR2I d_vert = VECTOR2I( 0, s.y / 2 + aWidth );
VECTOR2I d_horiz = VECTOR2I( s.x / 2 + aWidth, 0 );
breakouts.push_back( SHAPE_LINE_CHAIN( c, c + d_horiz ) );
breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_horiz ) );
breakouts.push_back( SHAPE_LINE_CHAIN( c, c + d_vert ) );
breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_vert ) );
if( aPermitDiagonal )
{
int l = aWidth + std::min( s.x, s.y ) / 2;
VECTOR2I d_diag;
if( s.x >= s.y )
{
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 ) ) );
breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_offset,
c - d_offset - VECTOR2I( l, l ) ) );
}
else
{
// fixme: this could be done more efficiently
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 ) ) );
breakouts.push_back( SHAPE_LINE_CHAIN( c, c - d_offset,
c - d_offset - VECTOR2I( l, l ) ) );
}
}
return breakouts;
}
PNS_OPTIMIZER::BREAKOUT_LIST PNS_OPTIMIZER::computeBreakouts( int aWidth,
const PNS_ITEM* aItem, bool aPermitDiagonal ) const
{
switch( aItem->Kind() )
{
case PNS_ITEM::VIA:
{
const PNS_VIA* via = static_cast<const PNS_VIA*>( aItem );
return circleBreakouts( aWidth, via->Shape(), aPermitDiagonal );
}
case PNS_ITEM::SOLID:
{
const SHAPE* shape = aItem->Shape();
switch( shape->Type() )
{
case SH_RECT:
return rectBreakouts( aWidth, shape, aPermitDiagonal );
case SH_SEGMENT:
{
const SHAPE_SEGMENT* seg = static_cast<const SHAPE_SEGMENT*> (shape);
const SHAPE_RECT rect = ApproximateSegmentAsRect ( *seg );
return rectBreakouts( aWidth, &rect, aPermitDiagonal );
}
case SH_CIRCLE:
return circleBreakouts( aWidth, shape, aPermitDiagonal );
case SH_CONVEX:
return convexBreakouts( aWidth, shape, aPermitDiagonal );
default:
break;
}
}
default:
break;
}
return BREAKOUT_LIST();
}
PNS_ITEM* PNS_OPTIMIZER::findPadOrVia( int aLayer, int aNet, const VECTOR2I& aP ) const
{
PNS_JOINT* jt = m_world->FindJoint( aP, aLayer, aNet );
if( !jt )
return NULL;
BOOST_FOREACH( PNS_ITEM* item, jt->LinkList() )
{
if( item->OfKind( PNS_ITEM::VIA | 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 std::pair<int, SHAPE_LINE_CHAIN> RtVariant;
std::vector<RtVariant> variants;
PNS_SOLID* solid = dyn_cast<PNS_SOLID*>( aPad );
// don't do auto-neckdown for offset pads
if( solid && solid->Offset() != VECTOR2I( 0, 0 ) )
return -1;
BREAKOUT_LIST breakouts = computeBreakouts( aLine->Width(), aPad, true );
SHAPE_LINE_CHAIN line = ( aEnd ? aLine->CLine().Reverse() : aLine->CLine() );
int p_end = std::min( aEndVertex, std::min( 3, line.PointCount() - 1 ) );
for( int p = 1; p <= p_end; p++ )
{
BOOST_FOREACH( SHAPE_LINE_CHAIN & l, breakouts ) {
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 ) );
if(!connect.SegmentCount())
continue;
int ang1 = dir_bkout.Angle( DIRECTION_45( connect.CSegment( 0 ) ) );
int ang2 = 0;
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 );
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( cost < min_cost || ( cost == min_cost && len < min_len ) )
{
l_best = vp.second;
p_best = vp.first;
found = true;
if( cost == min_cost )
min_len = std::min( len, min_len );
min_cost = std::min( cost, min_cost );
}
}
}
if( found )
{
aLine->SetShape( l_best );
return p_best;
}
return -1;
}
bool PNS_OPTIMIZER::runSmartPads( PNS_LINE* aLine )
{
SHAPE_LINE_CHAIN& line = aLine->Line();
if( line.PointCount() < 3 )
return false;
VECTOR2I p_start = line.CPoint( 0 ), p_end = line.CPoint( -1 );
PNS_ITEM* startPad = findPadOrVia( aLine->Layer(), aLine->Net(), p_start );
PNS_ITEM* endPad = findPadOrVia( aLine->Layer(), aLine->Net(), 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->Line().Simplify();
return true;
}
bool PNS_OPTIMIZER::Optimize( PNS_LINE* aLine, int aEffortLevel, PNS_NODE* aWorld )
{
PNS_OPTIMIZER opt( aWorld );
opt.SetEffortLevel( aEffortLevel );
opt.SetCollisionMask( -1 );
return opt.Optimize( aLine );
}
bool PNS_OPTIMIZER::fanoutCleanup( PNS_LINE* aLine )
{
if( aLine->PointCount() < 3 )
return false;
VECTOR2I p_start = aLine->CPoint( 0 ), p_end = aLine->CPoint( -1 );
PNS_ITEM* startPad = findPadOrVia( aLine->Layer(), aLine->Net(), p_start );
PNS_ITEM* endPad = findPadOrVia( aLine->Layer(), aLine->Net(), p_end );
int thr = aLine->Width() * 10;
int len = aLine->CLine().Length();
if( !startPad )
return false;
bool startMatch = startPad->OfKind( PNS_ITEM::VIA | PNS_ITEM::SOLID );
bool endMatch = false;
if(endPad)
{
endMatch = endPad->OfKind( PNS_ITEM::VIA | PNS_ITEM::SOLID );
}
else
{
endMatch = aLine->EndsWithVia();
}
if( startMatch && endMatch && len < thr )
{
for( int i = 0; i < 2; i++ )
{
SHAPE_LINE_CHAIN l2 = DIRECTION_45().BuildInitialTrace( p_start, p_end, i );
PNS_LINE repl;
repl = PNS_LINE( *aLine, l2 );
if( !m_world->CheckColliding( &repl ) )
{
aLine->SetShape( repl.CLine() );
return true;
}
}
}
return false;
}
int findCoupledVertices( const VECTOR2I& aVertex, const SEG& aOrigSeg, const SHAPE_LINE_CHAIN& aCoupled, PNS_DIFF_PAIR* aPair, int* aIndices )
{
int count = 0;
for ( int i = 0; i < aCoupled.SegmentCount(); i++ )
{
SEG s = aCoupled.CSegment( i );
VECTOR2I projOverCoupled = s.LineProject ( aVertex );
if( s.ApproxParallel ( aOrigSeg ) )
{
int64_t dist = ( projOverCoupled - aVertex ).EuclideanNorm() - aPair->Width();
if( aPair->GapConstraint().Matches( dist ) )
{
*aIndices++ = i;
count++;
}
}
}
return count;
}
bool verifyDpBypass( PNS_NODE* aNode, PNS_DIFF_PAIR* aPair, bool aRefIsP, const SHAPE_LINE_CHAIN& aNewRef, const SHAPE_LINE_CHAIN& aNewCoupled )
{
PNS_LINE refLine ( aRefIsP ? aPair->PLine() : aPair->NLine(), aNewRef );
PNS_LINE coupledLine ( aRefIsP ? aPair->NLine() : aPair->PLine(), aNewCoupled );
if( aNode->CheckColliding( &refLine, &coupledLine, PNS_ITEM::ANY, aPair->Gap() - 10 ) )
return false;
if( aNode->CheckColliding ( &refLine ) )
return false;
if( aNode->CheckColliding ( &coupledLine ) )
return false;
return true;
}
bool coupledBypass( PNS_NODE* aNode, PNS_DIFF_PAIR* aPair, bool aRefIsP, const SHAPE_LINE_CHAIN& aRef, const SHAPE_LINE_CHAIN& aRefBypass, const SHAPE_LINE_CHAIN& aCoupled, SHAPE_LINE_CHAIN& aNewCoupled )
{
int vStartIdx[1024]; // fixme: possible overflow
int nStarts = findCoupledVertices( aRefBypass.CPoint( 0 ), aRefBypass.CSegment( 0 ), aCoupled, aPair, vStartIdx );
DIRECTION_45 dir( aRefBypass.CSegment( 0 ) );
int64_t bestLength = -1;
bool found = false;
SHAPE_LINE_CHAIN bestBypass;
int si, ei;
for( int i=0; i< nStarts; i++ )
{
for( int j = 1; j < aCoupled.PointCount() - 1; j++ )
{
int delta = std::abs ( vStartIdx[i] - j );
if( delta > 1 )
{
const VECTOR2I& vs = aCoupled.CPoint( vStartIdx[i] );
SHAPE_LINE_CHAIN bypass = dir.BuildInitialTrace( vs, aCoupled.CPoint(j), dir.IsDiagonal() );
int64_t coupledLength = aPair->CoupledLength( aRef, bypass );
SHAPE_LINE_CHAIN newCoupled = aCoupled;
si = vStartIdx[i];
ei = j;
if(si < ei)
newCoupled.Replace( si, ei, bypass );
else
newCoupled.Replace( ei, si, bypass.Reverse() );
if(coupledLength > bestLength && verifyDpBypass( aNode, aPair, aRefIsP, aRef, newCoupled) )
{
bestBypass = newCoupled;
bestLength = coupledLength;
found = true;
}
}
}
}
if( found )
aNewCoupled = bestBypass;
return found;
}
bool checkDpColliding( PNS_NODE* aNode, PNS_DIFF_PAIR* aPair, bool aIsP, const SHAPE_LINE_CHAIN& aPath )
{
PNS_LINE tmp ( aIsP ? aPair->PLine() : aPair->NLine(), aPath );
return static_cast<bool>( aNode->CheckColliding( &tmp ) );
}
bool PNS_OPTIMIZER::mergeDpStep( PNS_DIFF_PAIR* aPair, bool aTryP, int step )
{
int n = 1;
SHAPE_LINE_CHAIN currentPath = aTryP ? aPair->CP() : aPair->CN();
SHAPE_LINE_CHAIN coupledPath = aTryP ? aPair->CN() : aPair->CP();
int n_segs = currentPath.SegmentCount() - 1;
int64_t clenPre = aPair->CoupledLength( currentPath, coupledPath );
int64_t budget = clenPre / 10; // fixme: come up with somethig more intelligent here...
while( n < n_segs - step )
{
const SEG s1 = currentPath.CSegment( n );
const SEG s2 = currentPath.CSegment( n + step );
DIRECTION_45 dir1( s1 );
DIRECTION_45 dir2( s2 );
if( dir1.IsObtuse( dir2 ) )
{
SHAPE_LINE_CHAIN bypass = DIRECTION_45().BuildInitialTrace( s1.A, s2.B, dir1.IsDiagonal() );
SHAPE_LINE_CHAIN newRef;
SHAPE_LINE_CHAIN newCoup;
int64_t deltaCoupled = -1, deltaUni = -1;
newRef = currentPath;
newRef.Replace( s1.Index(), s2.Index(), bypass );
deltaUni = aPair->CoupledLength ( newRef, coupledPath ) - clenPre + budget;
if ( coupledBypass( m_world, aPair, aTryP, newRef, bypass, coupledPath, newCoup ) )
{
deltaCoupled = aPair->CoupledLength( newRef, newCoup ) - clenPre + budget;
if( deltaCoupled >= 0 )
{
newRef.Simplify();
newCoup.Simplify();
aPair->SetShape( newRef, newCoup, !aTryP );
return true;
}
}
else if( deltaUni >= 0 && verifyDpBypass ( m_world, aPair, aTryP, newRef, coupledPath ) )
{
newRef.Simplify();
coupledPath.Simplify();
aPair->SetShape( newRef, coupledPath, !aTryP );
return true;
}
}
n++;
}
return false;
}
bool PNS_OPTIMIZER::mergeDpSegments( PNS_DIFF_PAIR* aPair )
{
int step_p = aPair->CP().SegmentCount() - 2;
int step_n = aPair->CN().SegmentCount() - 2;
while( 1 )
{
int n_segs_p = aPair->CP().SegmentCount();
int n_segs_n = aPair->CN().SegmentCount();
int max_step_p = n_segs_p - 2;
int max_step_n = n_segs_n - 2;
if( step_p > max_step_p )
step_p = max_step_p;
if( step_n > max_step_n )
step_n = max_step_n;
if( step_p < 1 && step_n < 1)
break;
bool found_anything_p = false;
bool found_anything_n = false;
if( step_p > 1 )
found_anything_p = mergeDpStep( aPair, true, step_p );
if( step_n > 1 )
found_anything_n = mergeDpStep( aPair, false, step_n );
if( !found_anything_n && !found_anything_p )
{
step_n--;
step_p--;
}
}
return true;
}
bool PNS_OPTIMIZER::Optimize( PNS_DIFF_PAIR* aPair )
{
return mergeDpSegments( aPair );
}
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