kicad/pcbnew/tracks_cleaner.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2004-2018 Jean-Pierre Charras, jp.charras at wanadoo.fr
* Copyright (C) 2011 Wayne Stambaugh <stambaughw@verizon.net>
* Copyright (C) 1992-2022 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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 2
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <reporter.h>
#include <board_commit.h>
#include <cleanup_item.h>
#include <connectivity/connectivity_algo.h>
#include <connectivity/connectivity_data.h>
#include <tool/tool_manager.h>
#include <tools/pcb_actions.h>
#include <tools/global_edit_tool.h>
#include <drc/drc_rtree.h>
#include <tracks_cleaner.h>
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TRACKS_CLEANER::TRACKS_CLEANER( BOARD* aPcb, BOARD_COMMIT& aCommit ) :
m_brd( aPcb ),
m_commit( aCommit ),
m_dryRun( true ),
m_itemsList( nullptr ),
m_reporter( nullptr )
{
}
/* Main cleaning function.
* Delete
* - Redundant points on tracks (merge aligned segments)
* - vias on pad
* - null length segments
*/
void TRACKS_CLEANER::CleanupBoard( bool aDryRun,
std::vector<std::shared_ptr<CLEANUP_ITEM> >* aItemsList,
bool aRemoveMisConnected, bool aCleanVias, bool aMergeSegments,
bool aDeleteUnconnected, bool aDeleteTracksinPad,
bool aDeleteDanglingVias, REPORTER* aReporter )
{
m_reporter = aReporter;
bool has_deleted = false;
m_dryRun = aDryRun;
m_itemsList = aItemsList;
if( m_reporter )
{
if( aDryRun )
m_reporter->Report( _( "Checking null tracks and vias..." ) );
else
m_reporter->Report( _( "Removing null tracks and vias..." ) );
wxSafeYield(); // Timeslice to update UI
}
bool removeNullSegments = aMergeSegments || aRemoveMisConnected;
cleanup( aCleanVias, removeNullSegments, aMergeSegments /* dup segments*/, aMergeSegments );
if( m_reporter )
{
if( aDryRun )
m_reporter->Report( _( "Checking redundant tracks..." ) );
else
m_reporter->Report( _( "Removing redundant tracks..." ) );
wxSafeYield(); // Timeslice to update UI
}
cleanup( false, false, true, aMergeSegments );
if( aRemoveMisConnected )
{
if( m_reporter )
{
if( aDryRun )
m_reporter->Report( _( "Checking shorting tracks..." ) );
else
m_reporter->Report( _( "Removing shorting tracks..." ) );
wxSafeYield(); // Timeslice to update UI
}
removeShortingTrackSegments();
}
if( aDeleteTracksinPad )
{
if( m_reporter )
{
if( aDryRun )
m_reporter->Report( _( "Checking tracks in pads..." ) );
else
m_reporter->Report( _( "Removing tracks in pads..." ) );
wxSafeYield(); // Timeslice to update UI
}
deleteTracksInPads();
}
if( aDeleteUnconnected || aDeleteDanglingVias )
{
if( m_reporter )
{
if( aDryRun )
{
m_reporter->Report( _( "Checking dangling tracks and vias..." ) );
}
else
{
if( aDeleteUnconnected )
m_reporter->Report( _( "Removing dangling tracks..." ) );
if( aDeleteDanglingVias )
m_reporter->Report( _( "Removing dangling vias..." ) );
}
wxSafeYield(); // Timeslice to update UI
}
has_deleted = deleteDanglingTracks( aDeleteUnconnected, aDeleteDanglingVias );
}
if( has_deleted && aMergeSegments )
{
if( m_reporter )
{
if( aDryRun )
m_reporter->Report( _( "Checking collinear tracks..." ) );
else
m_reporter->Report( _( "Merging collinear tracks..." ) );
wxSafeYield(); // Timeslice to update UI
}
cleanup( false, false, false, true );
}
}
void TRACKS_CLEANER::removeShortingTrackSegments()
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{
std::shared_ptr<CONNECTIVITY_DATA> connectivity = m_brd->GetConnectivity();
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std::set<BOARD_ITEM *> toRemove;
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for( PCB_TRACK* segment : m_brd->Tracks() )
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{
// Assume that the user knows what they are doing
if( segment->IsLocked() )
continue;
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for( PAD* testedPad : connectivity->GetConnectedPads( segment ) )
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{
if( segment->GetNetCode() != testedPad->GetNetCode() )
{
std::shared_ptr<CLEANUP_ITEM> item;
if( segment->Type() == PCB_VIA_T )
item = std::make_shared<CLEANUP_ITEM>( CLEANUP_SHORTING_VIA );
else
item = std::make_shared<CLEANUP_ITEM>( CLEANUP_SHORTING_TRACK );
item->SetItems( segment );
m_itemsList->push_back( item );
toRemove.insert( segment );
}
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}
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for( PCB_TRACK* testedTrack : connectivity->GetConnectedTracks( segment ) )
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{
if( segment->GetNetCode() != testedTrack->GetNetCode() )
{
std::shared_ptr<CLEANUP_ITEM> item;
if( segment->Type() == PCB_VIA_T )
item = std::make_shared<CLEANUP_ITEM>( CLEANUP_SHORTING_VIA );
else
item = std::make_shared<CLEANUP_ITEM>( CLEANUP_SHORTING_TRACK );
item->SetItems( segment );
m_itemsList->push_back( item );
toRemove.insert( segment );
}
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}
}
if( !m_dryRun )
removeItems( toRemove );
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}
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bool TRACKS_CLEANER::testTrackEndpointIsNode( PCB_TRACK* aTrack, bool aTstStart )
{
// A node is a point where more than 2 items are connected.
auto connectivity = m_brd->GetConnectivity();
auto items = connectivity->GetConnectivityAlgo()->ItemEntry( aTrack ).GetItems();
if( items.empty() )
return false;
auto citem = items.front();
if( !citem->Valid() )
return false;
auto anchors = citem->Anchors();
VECTOR2I refpoint = aTstStart ? aTrack->GetStart() : aTrack->GetEnd();
for( const auto& anchor : anchors )
{
if( anchor->Pos() != refpoint )
continue;
// The right anchor point is found: if more than one other item
// (pad, via, track...) is connected, it is a node:
return anchor->ConnectedItemsCount() > 1;
}
return false;
}
bool TRACKS_CLEANER::deleteDanglingTracks( bool aTrack, bool aVia )
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{
bool item_erased = false;
bool modified = false;
if( !aTrack && !aVia )
return false;
do // Iterate when at least one track is deleted
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{
item_erased = false;
// Ensure the connectivity is up to date, especially after removing a dangling segment
m_brd->BuildConnectivity();
// Keep a duplicate deque to all deleting in the primary
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std::deque<PCB_TRACK*> temp_tracks( m_brd->Tracks() );
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for( PCB_TRACK* track : temp_tracks )
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{
if( track->IsLocked() || ( track->GetFlags() & IS_DELETED ) > 0 )
continue;
if( !aVia && track->Type() == PCB_VIA_T )
continue;
if( !aTrack && ( track->Type() == PCB_TRACE_T || track->Type() == PCB_ARC_T ) )
continue;
// Test if a track (or a via) endpoint is not connected to another track or zone.
if( m_brd->GetConnectivity()->TestTrackEndpointDangling( track ) )
{
std::shared_ptr<CLEANUP_ITEM> item;
if( track->Type() == PCB_VIA_T )
item = std::make_shared<CLEANUP_ITEM>( CLEANUP_DANGLING_VIA );
else
item = std::make_shared<CLEANUP_ITEM>( CLEANUP_DANGLING_TRACK );
item->SetItems( track );
m_itemsList->push_back( item );
track->SetFlags( IS_DELETED );
// keep iterating, because a track connected to the deleted track
// now perhaps is not connected and should be deleted
item_erased = true;
if( !m_dryRun )
{
m_brd->Remove( track );
m_commit.Removed( track );
modified = true;
}
}
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}
} while( item_erased ); // A segment was erased: test for some new dangling segments
return modified;
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}
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void TRACKS_CLEANER::deleteTracksInPads()
{
std::set<BOARD_ITEM*> toRemove;
// Delete tracks that start and end on the same pad
std::shared_ptr<CONNECTIVITY_DATA> connectivity = m_brd->GetConnectivity();
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for( PCB_TRACK* track : m_brd->Tracks() )
{
if( track->IsLocked() )
continue;
if( track->Type() == PCB_VIA_T )
continue;
// Mark track if connected to pads
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for( PAD* pad : connectivity->GetConnectedPads( track ) )
{
if( pad->HitTest( track->GetStart() ) && pad->HitTest( track->GetEnd() ) )
{
SHAPE_POLY_SET poly;
track->TransformShapeWithClearanceToPolygon( poly, track->GetLayer(), 0,
ARC_HIGH_DEF, ERROR_INSIDE );
poly.BooleanSubtract( *pad->GetEffectivePolygon(), SHAPE_POLY_SET::PM_FAST );
if( poly.IsEmpty() )
{
auto item = std::make_shared<CLEANUP_ITEM>( CLEANUP_TRACK_IN_PAD );
item->SetItems( track );
m_itemsList->push_back( item );
toRemove.insert( track );
track->SetFlags( IS_DELETED );
}
}
}
}
if( !m_dryRun )
removeItems( toRemove );
}
/**
* Geometry-based cleanup: duplicate items, null items, colinear items.
*/
void TRACKS_CLEANER::cleanup( bool aDeleteDuplicateVias, bool aDeleteNullSegments,
bool aDeleteDuplicateSegments, bool aMergeSegments )
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{
DRC_RTREE rtree;
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for( PCB_TRACK* track : m_brd->Tracks() )
{
track->ClearFlags( IS_DELETED | SKIP_STRUCT );
rtree.Insert( track, track->GetLayer() );
}
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std::set<BOARD_ITEM*> toRemove;
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for( PCB_TRACK* track : m_brd->Tracks() )
{
if( track->HasFlag( IS_DELETED ) || track->IsLocked() )
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continue;
if( aDeleteDuplicateVias && track->Type() == PCB_VIA_T )
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{
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PCB_VIA* via = static_cast<PCB_VIA*>( track );
if( via->GetStart() != via->GetEnd() )
via->SetEnd( via->GetStart() );
rtree.QueryColliding( via, via->GetLayer(), via->GetLayer(),
// Filter:
[&]( BOARD_ITEM* aItem ) -> bool
{
return aItem->Type() == PCB_VIA_T
&& !aItem->HasFlag( SKIP_STRUCT )
&& !aItem->HasFlag( IS_DELETED );
},
// Visitor:
[&]( BOARD_ITEM* aItem ) -> bool
{
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PCB_VIA* other = static_cast<PCB_VIA*>( aItem );
if( via->GetPosition() == other->GetPosition()
&& via->GetViaType() == other->GetViaType()
&& via->GetLayerSet() == other->GetLayerSet() )
{
auto item = std::make_shared<CLEANUP_ITEM>( CLEANUP_REDUNDANT_VIA );
item->SetItems( via );
m_itemsList->push_back( item );
via->SetFlags( IS_DELETED );
toRemove.insert( via );
}
return true;
} );
// To delete through Via on THT pads at same location
// Examine the list of connected pads: if a through pad is found, the via is redundant
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for( PAD* pad : m_brd->GetConnectivity()->GetConnectedPads( via ) )
{
const LSET all_cu = LSET::AllCuMask();
if( ( pad->GetLayerSet() & all_cu ) == all_cu )
{
auto item = std::make_shared<CLEANUP_ITEM>( CLEANUP_REDUNDANT_VIA );
item->SetItems( via, pad );
m_itemsList->push_back( item );
via->SetFlags( IS_DELETED );
toRemove.insert( via );
break;
}
}
via->SetFlags( SKIP_STRUCT );
}
if( aDeleteNullSegments && track->Type() != PCB_VIA_T )
{
if( track->IsNull() )
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{
auto item = std::make_shared<CLEANUP_ITEM>( CLEANUP_ZERO_LENGTH_TRACK );
item->SetItems( track );
m_itemsList->push_back( item );
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track->SetFlags( IS_DELETED );
toRemove.insert( track );
}
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}
if( aDeleteDuplicateSegments && track->Type() == PCB_TRACE_T && !track->IsNull() )
{
rtree.QueryColliding( track, track->GetLayer(), track->GetLayer(),
// Filter:
[&]( BOARD_ITEM* aItem ) -> bool
{
return aItem->Type() == PCB_TRACE_T
&& !aItem->HasFlag( SKIP_STRUCT )
&& !aItem->HasFlag( IS_DELETED )
&& !static_cast<PCB_TRACK*>( aItem )->IsNull();
},
// Visitor:
[&]( BOARD_ITEM* aItem ) -> bool
{
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PCB_TRACK* other = static_cast<PCB_TRACK*>( aItem );
if( track->IsPointOnEnds( other->GetStart() )
&& track->IsPointOnEnds( other->GetEnd() )
&& track->GetWidth() == other->GetWidth()
&& track->GetLayer() == other->GetLayer() )
{
auto item = std::make_shared<CLEANUP_ITEM>( CLEANUP_DUPLICATE_TRACK );
item->SetItems( track );
m_itemsList->push_back( item );
track->SetFlags( IS_DELETED );
toRemove.insert( track );
}
return true;
} );
track->SetFlags( SKIP_STRUCT );
}
}
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if( !m_dryRun )
removeItems( toRemove );
if( aMergeSegments )
{
bool merged;
do
{
merged = false;
m_brd->BuildConnectivity();
auto connectivity = m_brd->GetConnectivity()->GetConnectivityAlgo();
// Keep a duplicate deque to all deleting in the primary
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std::deque<PCB_TRACK*> temp_segments( m_brd->Tracks() );
m_connectedItemsCache.clear();
// merge collinear segments:
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for( PCB_TRACK* segment : temp_segments )
{
// one can merge only collinear segments, not vias or arcs.
if( segment->Type() != PCB_TRACE_T )
continue;
if( segment->HasFlag( IS_DELETED ) ) // already taken into account
continue;
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// for each end of the segment:
for( CN_ITEM* citem : connectivity->ItemEntry( segment ).GetItems() )
{
// Do not merge an end which has different width tracks attached -- it's a
// common use-case for necking-down a track between pads.
std::vector<PCB_TRACK*> sameWidthCandidates;
std::vector<PCB_TRACK*> differentWidthCandidates;
for( CN_ITEM* connected : citem->ConnectedItems() )
{
if( !connected->Valid() )
continue;
BOARD_CONNECTED_ITEM* candidate = connected->Parent();
if( candidate->Type() == PCB_TRACE_T && !candidate->HasFlag( IS_DELETED ) )
{
PCB_TRACK* candidateSegment = static_cast<PCB_TRACK*>( candidate );
if( candidateSegment->GetWidth() == segment->GetWidth() )
{
sameWidthCandidates.push_back( candidateSegment );
}
else
{
differentWidthCandidates.push_back( candidateSegment );
break;
}
}
}
if( !differentWidthCandidates.empty() )
continue;
for( PCB_TRACK* candidate : sameWidthCandidates )
{
if( segment->ApproxCollinear( *candidate )
&& mergeCollinearSegments( segment, candidate ) )
{
merged = true;
break;
}
}
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}
}
} while( merged );
}
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for( PCB_TRACK* track : m_brd->Tracks() )
track->ClearFlags( IS_DELETED | SKIP_STRUCT );
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}
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const std::vector<BOARD_CONNECTED_ITEM*>& TRACKS_CLEANER::getConnectedItems( PCB_TRACK* aTrack )
{
const std::shared_ptr<CONNECTIVITY_DATA>& connectivity = m_brd->GetConnectivity();
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if( m_connectedItemsCache.count( aTrack ) == 0 )
{
m_connectedItemsCache[ aTrack ] =
connectivity->GetConnectedItems( aTrack, { PCB_TRACE_T, PCB_ARC_T, PCB_VIA_T,
PCB_PAD_T, PCB_ZONE_T } );
}
return m_connectedItemsCache[ aTrack ];
}
bool TRACKS_CLEANER::mergeCollinearSegments( PCB_TRACK* aSeg1, PCB_TRACK* aSeg2 )
{
if( aSeg1->IsLocked() || aSeg2->IsLocked() )
return false;
// Collect the unique points where the two tracks are connected to other items
std::set<VECTOR2I> pts;
auto collectPts =
[&]( BOARD_CONNECTED_ITEM* citem )
{
if( citem->Type() == PCB_TRACE_T || citem->Type() == PCB_ARC_T
|| citem->Type() == PCB_VIA_T )
{
PCB_TRACK* track = static_cast<PCB_TRACK*>( citem );
if( track->IsPointOnEnds( aSeg1->GetStart() ) )
pts.emplace( aSeg1->GetStart() );
if( track->IsPointOnEnds( aSeg1->GetEnd() ) )
pts.emplace( aSeg1->GetEnd() );
if( track->IsPointOnEnds( aSeg2->GetStart() ) )
pts.emplace( aSeg2->GetStart() );
if( track->IsPointOnEnds( aSeg2->GetEnd() ) )
pts.emplace( aSeg2->GetEnd() );
}
else
{
if( citem->HitTest( aSeg1->GetStart(), ( aSeg1->GetWidth() + 1 ) / 2 ) )
pts.emplace( aSeg1->GetStart() );
if( citem->HitTest( aSeg1->GetEnd(), ( aSeg1->GetWidth() + 1 ) / 2 ) )
pts.emplace( aSeg1->GetEnd() );
if( citem->HitTest( aSeg2->GetStart(), ( aSeg2->GetWidth() + 1 ) / 2 ) )
pts.emplace( aSeg2->GetStart() );
if( citem->HitTest( aSeg2->GetEnd(), ( aSeg2->GetWidth() + 1 ) / 2 ) )
pts.emplace( aSeg2->GetEnd() );
}
};
for( BOARD_CONNECTED_ITEM* item : getConnectedItems( aSeg1 ) )
{
if( item != aSeg1 && item != aSeg2 )
collectPts( item );
}
for( BOARD_CONNECTED_ITEM* item : getConnectedItems( aSeg2 ) )
{
if( item != aSeg1 && item != aSeg2 )
collectPts( item );
}
// This means there is a node in the center
if( pts.size() > 2 )
return false;
// Verify the removed point after merging is not a node.
// If it is a node (i.e. if more than one other item is connected, the segments cannot be merged
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PCB_TRACK dummy_seg( *aSeg1 );
// Calculate the new ends of the segment to merge, and store them to dummy_seg:
int min_x = std::min( aSeg1->GetStart().x,
std::min( aSeg1->GetEnd().x, std::min( aSeg2->GetStart().x, aSeg2->GetEnd().x ) ) );
int min_y = std::min( aSeg1->GetStart().y,
std::min( aSeg1->GetEnd().y, std::min( aSeg2->GetStart().y, aSeg2->GetEnd().y ) ) );
int max_x = std::max( aSeg1->GetStart().x,
std::max( aSeg1->GetEnd().x, std::max( aSeg2->GetStart().x, aSeg2->GetEnd().x ) ) );
int max_y = std::max( aSeg1->GetStart().y,
std::max( aSeg1->GetEnd().y, std::max( aSeg2->GetStart().y, aSeg2->GetEnd().y ) ) );
if( ( aSeg1->GetStart().x > aSeg1->GetEnd().x )
== ( aSeg1->GetStart().y > aSeg1->GetEnd().y ) )
{
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dummy_seg.SetStart( VECTOR2I( min_x, min_y ) );
dummy_seg.SetEnd( VECTOR2I( max_x, max_y ) );
}
else
{
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dummy_seg.SetStart( VECTOR2I( min_x, max_y ) );
dummy_seg.SetEnd( VECTOR2I( max_x, min_y ) );
}
// If the existing connected points are not the same as the points generated by our
// min/max alg, then assign the missing points to the end closest. This ensures that
// our replacement track is still connected
for( auto pt : pts )
{
if( !dummy_seg.IsPointOnEnds( wxPoint( pt.x, pt.y ) ) )
{
if( ( VECTOR2I( dummy_seg.GetStart() ) - pt ).SquaredEuclideanNorm() <
( VECTOR2I( dummy_seg.GetEnd() ) - pt ).SquaredEuclideanNorm() )
dummy_seg.SetStart( wxPoint( pt.x, pt.y ) );
else
dummy_seg.SetEnd( wxPoint( pt.x, pt.y ) );
}
}
// Now find the removed end(s) and stop merging if it is a node:
if( aSeg1->GetStart() != dummy_seg.GetStart() && aSeg1->GetStart() != dummy_seg.GetEnd() )
{
if( testTrackEndpointIsNode( aSeg1, true ) )
return false;
}
if( aSeg1->GetEnd() != dummy_seg.GetStart() && aSeg1->GetEnd() != dummy_seg.GetEnd() )
{
if( testTrackEndpointIsNode( aSeg1, false ) )
return false;
}
std::shared_ptr<CLEANUP_ITEM> item = std::make_shared<CLEANUP_ITEM>( CLEANUP_MERGE_TRACKS );
item->SetItems( aSeg1, aSeg2 );
m_itemsList->push_back( item );
aSeg2->SetFlags( IS_DELETED );
if( !m_dryRun )
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{
m_commit.Modify( aSeg1 );
*aSeg1 = dummy_seg;
m_brd->GetConnectivity()->Update( aSeg1 );
// Clear the status flags here after update.
for( PAD* pad : m_brd->GetConnectivity()->GetConnectedPads( aSeg1 ) )
{
aSeg1->SetState( BEGIN_ONPAD, pad->HitTest( aSeg1->GetStart() ) );
aSeg1->SetState( END_ONPAD, pad->HitTest( aSeg1->GetEnd() ) );
}
// Merge successful, seg2 has to go away
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m_brd->Remove( aSeg2 );
m_commit.Removed( aSeg2 );
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}
return true;
}
void TRACKS_CLEANER::removeItems( std::set<BOARD_ITEM*>& aItems )
{
for( auto item : aItems )
{
m_brd->Remove( item );
m_commit.Removed( item );
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}
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}