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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) 1992-2020 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 <fctsys.h>
#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 <tracks_cleaner.h>
TRACKS_CLEANER::TRACKS_CLEANER( BOARD* aPcb, BOARD_COMMIT& aCommit ) :
m_brd( aPcb ),
m_commit( aCommit ),
m_dryRun( true ),
m_itemsList( 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<CLEANUP_ITEM*>* aItemsList,
bool aRemoveMisConnected, bool aCleanVias, bool aMergeSegments,
bool aDeleteUnconnected, bool aDeleteTracksinPad )
{
m_dryRun = aDryRun;
m_itemsList = aItemsList;
// Clear the flag used to mark some segments as deleted, in dry run:
for( TRACK* segment : m_brd->Tracks() )
segment->ClearFlags( IS_DELETED );
// delete redundant vias
if( aCleanVias )
cleanupVias();
// Remove null segments and intermediate points on aligned segments
// If not asked, remove null segments only if remove misconnected is asked
if( aMergeSegments )
cleanupSegments();
else if( aRemoveMisConnected )
deleteNullSegments( m_brd->Tracks() );
if( aRemoveMisConnected )
removeBadTrackSegments();
if( aDeleteTracksinPad )
deleteTracksInPads();
// Delete dangling tracks
if( aDeleteUnconnected )
{
if( deleteDanglingTracks() )
{
// Removed tracks can leave aligned segments
// (when a T was formed by tracks and the "vertical" segment is removed)
if( aMergeSegments )
cleanupSegments();
}
}
// Clear the flag used to mark some segments:
for( TRACK* segment : m_brd->Tracks() )
segment->ClearFlags( IS_DELETED );
}
void TRACKS_CLEANER::removeBadTrackSegments()
{
std::shared_ptr<CONNECTIVITY_DATA> connectivity = m_brd->GetConnectivity();
std::set<BOARD_ITEM *> toRemove;
for( TRACK* segment : m_brd->Tracks() )
{
segment->SetState( FLAG0, false );
for( auto testedPad : connectivity->GetConnectedPads( segment ) )
{
if( segment->GetNetCode() != testedPad->GetNetCode() )
{
CLEANUP_ITEM* item = new CLEANUP_ITEM( CLEANUP_SHORT );
item->SetItems( segment );
m_itemsList->push_back( item );
toRemove.insert( segment );
}
}
for( TRACK* testedTrack : connectivity->GetConnectedTracks( segment ) )
{
if( segment->GetNetCode() != testedTrack->GetNetCode() && !testedTrack->GetState( FLAG0 ) )
{
CLEANUP_ITEM* item = new CLEANUP_ITEM( CLEANUP_SHORT );
item->SetItems( segment );
m_itemsList->push_back( item );
toRemove.insert( segment );
}
}
}
if( !m_dryRun )
removeItems( toRemove );
}
void TRACKS_CLEANER::cleanupVias()
{
std::set<BOARD_ITEM*> toRemove;
std::vector<VIA*> vias;
for( TRACK* track : m_brd->Tracks() )
{
if( auto via = dyn_cast<VIA*>( track ) )
vias.push_back( via );
}
for( auto via1_it = vias.begin(); via1_it != vias.end(); via1_it++ )
{
VIA* via1 = *via1_it;
if( via1->IsLocked() )
continue;
if( via1->GetStart() != via1->GetEnd() )
via1->SetEnd( via1->GetStart() );
// To delete through Via on THT pads at same location
// Examine the list of connected pads:
// if a through pad is found, the via can be removed
const std::vector<D_PAD*> pads = m_brd->GetConnectivity()->GetConnectedPads( via1 );
for( D_PAD* pad : pads )
{
const LSET all_cu = LSET::AllCuMask();
if( ( pad->GetLayerSet() & all_cu ) == all_cu )
{
CLEANUP_ITEM* item = new CLEANUP_ITEM( CLEANUP_REDUNDANT_VIA );
item->SetItems( via1, pad );
m_itemsList->push_back( item );
// redundant: delete the via
toRemove.insert( via1 );
break;
}
}
for( auto via2_it = via1_it + 1; via2_it != vias.end(); via2_it++ )
{
VIA* via2 = *via2_it;
if( via1->GetPosition() != via2->GetPosition() || via2->IsLocked() )
continue;
if( via1->GetViaType() == via2->GetViaType() )
{
CLEANUP_ITEM* item = new CLEANUP_ITEM( CLEANUP_REDUNDANT_VIA );
item->SetItems( via1, via2 );
m_itemsList->push_back( item );
toRemove.insert( via2 );
break;
}
}
}
if( !m_dryRun )
removeItems( toRemove );
}
bool TRACKS_CLEANER::testTrackEndpointIsNode( 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 item_erased = false;
bool modified = false;
do // Iterate when at least one track is deleted
{
item_erased = false;
// Ensure the connectivity is up to date, especially after removind a dangling segment
m_brd->BuildConnectivity();
// Keep a duplicate deque to all deleting in the primary
std::deque<TRACK*> temp_tracks( m_brd->Tracks() );
for( TRACK* track : temp_tracks )
{
bool flag_erase = false; // Start without a good reason to erase it
wxPoint pos;
// Tst if a track (or a via) endpoint is not connected to another track or to a zone.
if( m_brd->GetConnectivity()->TestTrackEndpointDangling( track, &pos ) )
flag_erase = true;
if( flag_erase )
{
int errorCode = track->IsTrack() ? CLEANUP_DANGLING_TRACK : CLEANUP_DANGLING_VIA;
CLEANUP_ITEM* item = new CLEANUP_ITEM( errorCode );
item->SetItems( track );
m_itemsList->push_back( item );
if( !m_dryRun )
{
m_brd->Remove( track );
m_commit.Removed( track );
/* keep iterating, because a track connected to the deleted track
* now perhaps is not connected and should be deleted */
item_erased = true;
modified = true;
}
// Fix me: In dry run we should disable the track to erase and retry with this disabled track
// However the connectivity algo does not handle disabled items.
}
}
} while( item_erased ); // A segment was erased: test for some new dangling segments
return modified;
}
// Delete null length track segments
void TRACKS_CLEANER::deleteNullSegments( TRACKS& aTracks )
{
std::set<BOARD_ITEM *> toRemove;
for( TRACK* segment : aTracks )
{
if( segment->IsNull() && segment->Type() == PCB_TRACE_T && !segment->IsLocked() )
{
CLEANUP_ITEM* item = new CLEANUP_ITEM( CLEANUP_ZERO_LENGTH_TRACK );
item->SetItems( segment );
m_itemsList->push_back( item );
toRemove.insert( segment );
}
}
if( !m_dryRun )
removeItems( toRemove );
}
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();
for( TRACK* track : m_brd->Tracks() )
{
// Mark track if connected to pads
for( D_PAD* pad : connectivity->GetConnectedPads( track ) )
{
if( pad->HitTest( track->GetStart() ) && pad->HitTest( track->GetEnd() ) )
{
CLEANUP_ITEM* item = new CLEANUP_ITEM( CLEANUP_TRACK_IN_PAD );
item->SetItems( track );
m_itemsList->push_back( item );
toRemove.insert( track );
}
}
}
if( !m_dryRun )
removeItems( toRemove );
}
// Delete null length segments, and intermediate points ..
void TRACKS_CLEANER::cleanupSegments()
{
// Easy things first
deleteNullSegments( m_brd->Tracks() );
std::set<BOARD_ITEM*> toRemove;
// Remove duplicate segments (2 superimposed identical segments):
for( auto it = m_brd->Tracks().begin(); it != m_brd->Tracks().end(); it++ )
{
TRACK* track1 = *it;
if( track1->Type() != PCB_TRACE_T || track1->HasFlag( IS_DELETED ) || track1->IsLocked() )
continue;
for( auto it2 = it + 1; it2 != m_brd->Tracks().end(); it2++ )
{
TRACK* track2 = *it2;
if( track2->HasFlag( IS_DELETED ) )
continue;
if( track1->IsPointOnEnds( track2->GetStart() )
&& track1->IsPointOnEnds( track2->GetEnd() )
&& track1->GetWidth() == track2->GetWidth()
&& track1->GetLayer() == track2->GetLayer() )
{
CLEANUP_ITEM* item = new CLEANUP_ITEM( CLEANUP_DUPLICATE_TRACK );
item->SetItems( track2 );
m_itemsList->push_back( item );
track2->SetFlags( IS_DELETED );
toRemove.insert( track2 );
}
}
}
if( !m_dryRun )
removeItems( toRemove );
// Keep a duplicate deque to all deleting in the primary
std::deque<TRACK*> temp_segments( m_brd->Tracks() );
// merge collinear segments:
for( TRACK* segment : temp_segments )
{
if( segment->Type() != PCB_TRACE_T ) // one can merge only track collinear segments, not vias.
continue;
if( segment->HasFlag( IS_DELETED ) ) // already taken in account
continue;
auto connectivity = m_brd->GetConnectivity();
auto& entry = connectivity->GetConnectivityAlgo()->ItemEntry( segment );
for( CN_ITEM* citem : entry.GetItems() )
{
for( CN_ITEM* connected : citem->ConnectedItems() )
{
if( !connected->Valid() )
continue;
BOARD_CONNECTED_ITEM* candidateItem = connected->Parent();
if( candidateItem->Type() == PCB_TRACE_T && !candidateItem->HasFlag( IS_DELETED ) )
{
TRACK* candidateSegment = static_cast<TRACK*>( candidateItem );
// Do not merge segments having different widths: it is a frequent case
// to draw a track between 2 pads:
if( candidateSegment->GetWidth() != segment->GetWidth() )
continue;
if( segment->ApproxCollinear( *candidateSegment ) )
mergeCollinearSegments( segment, candidateSegment );
}
}
}
}
}
void TRACKS_CLEANER::mergeCollinearSegments( TRACK* aSeg1, TRACK* aSeg2 )
{
if( aSeg1->IsLocked() || aSeg2->IsLocked() )
return;
auto connectivity = m_brd->GetConnectivity();
// 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
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 ) )
{
dummy_seg.SetStart( wxPoint( min_x, min_y ) );
dummy_seg.SetEnd( wxPoint( max_x, max_y ) );
}
else
{
dummy_seg.SetStart( wxPoint( min_x, max_y ) );
dummy_seg.SetEnd( wxPoint( max_x, min_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;
}
if( aSeg1->GetEnd() != dummy_seg.GetStart() && aSeg1->GetEnd() != dummy_seg.GetEnd() )
{
if( testTrackEndpointIsNode( aSeg1, false ) )
return;
}
CLEANUP_ITEM* item = new CLEANUP_ITEM( CLEANUP_MERGE_TRACKS );
item->SetItems( aSeg1, aSeg2 );
m_itemsList->push_back( item );
aSeg2->SetFlags( IS_DELETED );
if( !m_dryRun )
{
m_commit.Modify( aSeg1 );
*aSeg1 = dummy_seg;
connectivity->Update( aSeg1 );
// Clear the status flags here after update.
for( auto pad : connectivity->GetConnectedPads( aSeg1 ) )
{
aSeg1->SetState( BEGIN_ONPAD, pad->HitTest( aSeg1->GetStart() ) );
aSeg1->SetState( END_ONPAD, pad->HitTest( aSeg1->GetEnd() ) );
}
// Merge succesful, seg2 has to go away
m_brd->Remove( aSeg2 );
m_commit.Removed( aSeg2 );
}
}
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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