bool TRACKS_CLEANER::remove_duplicates_of_track( const TRACK *aTrack )
{
bool modified = false;
TRACK *nextsegment;
for( TRACK *other = aTrack->Next(); other; other = nextsegment )
{
nextsegment = other->Next();
// New netcode, break out (can't be there any other)
if( aTrack->GetNetCode() != other->GetNetCode() )
break;
// Must be of the same type, on the same layer and the endpoints
// must be the same (maybe swapped)
if( (aTrack->Type() != other->Type()) &&
(aTrack->GetLayer() != other->GetLayer()) )
{
if( ((aTrack->GetStart() == other->GetStart()) &&
(aTrack->GetEnd() == other->GetEnd())) ||
((aTrack->GetStart() == other->GetEnd()) &&
(aTrack->GetEnd() == other->GetStart())))
{
m_Brd->GetRatsnest()->Remove( other );
other->ViewRelease();
other->DeleteStructure();
modified = true;
}
}
}
return modified;
}
bool TRACKS_CLEANER::merge_collinear_of_track( TRACK *aSegment )
{
bool merged_this = false;
// *WHY* doesn't C++ have prec and succ (or ++ --) like PASCAL?
for( ENDPOINT_T endpoint = ENDPOINT_START; endpoint <= ENDPOINT_END;
endpoint = ENDPOINT_T( endpoint + 1 ) )
{
// search for a possible segment connected to the current endpoint of the current one
TRACK *other = aSegment->Next();
if( other )
{
other = aSegment->GetTrack( other, NULL, endpoint, true, false );
if( other )
{
// the two segments must have the same width and the other
// cannot be a via
if( (aSegment->GetWidth() == other->GetWidth()) &&
(other->Type() == PCB_TRACE_T) )
{
// There can be only one segment connected
other->SetState( BUSY, true );
TRACK *yet_another = aSegment->GetTrack( m_Brd->m_Track, NULL,
endpoint, true, false );
other->SetState( BUSY, false );
if( !yet_another )
{
// Try to merge them
TRACK *segDelete = mergeCollinearSegmentIfPossible( aSegment,
other, endpoint );
// Merge succesful, the other one has to go away
if( segDelete )
{
m_Brd->GetRatsnest()->Remove( segDelete );
segDelete->ViewRelease();
segDelete->DeleteStructure();
merged_this = true;
}
}
}
}
}
}
return merged_this;
}
/*
* Delete dangling tracks
* Vias:
* If a via is only connected to a dangling track, it also will be removed
*/
bool TRACKS_CLEANER::deleteUnconnectedTracks()
{
if( m_Brd->m_Track == NULL )
return false;
bool modified = false;
bool item_erased;
do // Iterate when at least one track is deleted
{
item_erased = false;
TRACK* next_track;
for( TRACK *track = m_Brd->m_Track; track != NULL; track = next_track )
{
next_track = track->Next();
bool flag_erase = false; // Start without a good reason to erase it
/* if a track endpoint is not connected to a pad, test if
* the endpoint is connected to another track or to a zone.
* For via test, an enhancement could be to test if
* connected to 2 items on different layers. Currently
* a via must be connected to 2 items, that can be on the
* same layer */
// Check if there is nothing attached on the start
if( !(track->GetState( START_ON_PAD )) )
flag_erase |= testTrackEndpointDangling( track, ENDPOINT_START );
// Check if there is nothing attached on the end
if( !(track->GetState( END_ON_PAD )) )
flag_erase |= testTrackEndpointDangling( track, ENDPOINT_END );
if( flag_erase )
{
// remove segment from board
m_Brd->GetRatsnest()->Remove( track );
track->ViewRelease();
track->DeleteStructure();
/* keep iterating, because a track connected to the deleted track
* now perhaps is not connected and should be deleted */
item_erased = true;
modified = true;
}
}
} while( item_erased );
return modified;
}
// Delete null length track segments
bool TRACKS_CLEANER::delete_null_segments()
{
TRACK *nextsegment;
bool modified = false;
// Delete null segments
for( TRACK *segment = m_Brd->m_Track; segment; segment = nextsegment )
{
nextsegment = segment->Next();
if( segment->IsNull() ) // Length segment = 0; delete it
{
m_Brd->GetRatsnest()->Remove( segment );
segment->ViewRelease();
segment->DeleteStructure();
modified = true;
}
}
return modified;
}
// Delete null length segments, and intermediate points ..
bool TRACKS_CLEANER::clean_segments()
{
bool modified = false;
TRACK* segment, * nextsegment;
TRACK* other;
int flag, no_inc;
// Delete null segments
for( segment = m_Brd->m_Track; segment; segment = nextsegment )
{
nextsegment = segment->Next();
if( segment->IsNull() ) // Length segment = 0; delete it
segment->DeleteStructure();
}
// Delete redundant segments, i.e. segments having the same end points
// and layers
for( segment = m_Brd->m_Track; segment; segment = segment->Next() )
{
for( other = segment->Next(); other; other = nextsegment )
{
nextsegment = other->Next();
bool erase = false;
if( segment->Type() != other->Type() )
continue;
if( segment->GetLayer() != other->GetLayer() )
continue;
if( segment->GetNetCode() != other->GetNetCode() )
break;
if( ( segment->GetStart() == other->GetStart() ) &&
( segment->GetEnd() == other->GetEnd() ) )
erase = true;
if( ( segment->GetStart() == other->GetEnd() ) &&
( segment->GetEnd() == other->GetStart() ) )
erase = true;
// Delete redundant point
if( erase )
{
other->DeleteStructure();
modified = true;
}
}
}
// merge collinear segments:
for( segment = m_Brd->m_Track; segment; segment = nextsegment )
{
TRACK* segStart;
TRACK* segEnd;
TRACK* segDelete;
nextsegment = segment->Next();
if( segment->Type() != PCB_TRACE_T )
continue;
flag = no_inc = 0;
// search for a possible point connected to the START point of the current segment
for( segStart = segment->Next(); ; )
{
segStart = segment->GetTrace( segStart, NULL, FLG_START );
if( segStart )
{
// the two segments must have the same width
if( segment->GetWidth() != segStart->GetWidth() )
break;
// it cannot be a via
if( segStart->Type() != PCB_TRACE_T )
break;
// We must have only one segment connected
segStart->SetState( BUSY, true );
other = segment->GetTrace( m_Brd->m_Track, NULL, FLG_START );
segStart->SetState( BUSY, false );
if( other == NULL )
flag = 1; // OK
break;
}
break;
}
if( flag ) // We have the starting point of the segment is connected to an other segment
{
segDelete = mergeCollinearSegmentIfPossible( segment, segStart, FLG_START );
if( segDelete )
{
no_inc = 1;
segDelete->DeleteStructure();
modified = true;
}
}
// search for a possible point connected to the END point of the current segment:
for( segEnd = segment->Next(); ; )
{
segEnd = segment->GetTrace( segEnd, NULL, FLG_END );
if( segEnd )
{
if( segment->GetWidth() != segEnd->GetWidth() )
break;
if( segEnd->Type() != PCB_TRACE_T )
break;
// We must have only one segment connected
segEnd->SetState( BUSY, true );
other = segment->GetTrace( m_Brd->m_Track, NULL, FLG_END );
segEnd->SetState( BUSY, false );
if( other == NULL )
flag |= 2; // Ok
break;
}
else
{
break;
}
}
if( flag & 2 ) // We have the ending point of the segment is connected to an other segment
{
segDelete = mergeCollinearSegmentIfPossible( segment, segEnd, FLG_END );
if( segDelete )
{
no_inc = 1;
segDelete->DeleteStructure();
modified = true;
}
}
if( no_inc ) // The current segment was modified, retry to merge it
nextsegment = segment->Next();
}
return modified;
}
/*
* Delete dangling tracks
* Vias:
* If a via is only connected to a dangling track, it also will be removed
*/
bool TRACKS_CLEANER::deleteUnconnectedTracks()
{
if( m_Brd->m_Track == NULL )
return false;
bool modified = false;
bool item_erased = true;
while( item_erased ) // Iterate when at least one track is deleted
{
item_erased = false;
TRACK* next_track;
for( TRACK * track = m_Brd->m_Track; track ; track = next_track )
{
next_track = track->Next();
int flag_erase = 0; //Not connected indicator
int type_end = 0;
if( track->GetState( START_ON_PAD ) )
type_end |= START_ON_PAD;
if( track->GetState( END_ON_PAD ) )
type_end |= END_ON_PAD;
// if the track start point is not connected to a pad,
// test if this track start point is connected to another track
// For via test, an enhancement could be to test if connected
// to 2 items on different layers.
// Currently a via must be connected to 2 items, that can be on the same layer
LAYER_NUM top_layer, bottom_layer;
ZONE_CONTAINER* zone;
if( (type_end & START_ON_PAD ) == 0 )
{
TRACK* other = track->GetTrace( m_Brd->m_Track, NULL, FLG_START );
if( other == NULL ) // Test a connection to zones
{
if( track->Type() != PCB_VIA_T )
{
zone = m_Brd->HitTestForAnyFilledArea( track->GetStart(),
track->GetLayer(),
track->GetLayer(),
track->GetNetCode() );
}
else
{
((SEGVIA*)track)->LayerPair( &top_layer, &bottom_layer );
zone = m_Brd->HitTestForAnyFilledArea( track->GetStart(),
top_layer, bottom_layer,
track->GetNetCode() );
}
}
if( (other == NULL) && (zone == NULL) )
{
flag_erase |= 1;
}
else // segment, via or zone connected to this end
{
track->start = other;
// If a via is connected to this end,
// test if this via has a second item connected.
// If no, remove it with the current segment
if( other && other->Type() == PCB_VIA_T )
{
// search for another segment following the via
track->SetState( BUSY, true );
SEGVIA* via = (SEGVIA*) other;
other = via->GetTrace( m_Brd->m_Track, NULL, FLG_START );
if( other == NULL )
{
via->LayerPair( &top_layer, &bottom_layer );
zone = m_Brd->HitTestForAnyFilledArea( via->GetStart(),
bottom_layer,
top_layer,
via->GetNetCode() );
}
if( (other == NULL) && (zone == NULL) )
flag_erase |= 2;
track->SetState( BUSY, false );
}
}
}
// if track end point is not connected to a pad,
// test if this track end point is connected to an other track
if( (type_end & END_ON_PAD ) == 0 )
{
TRACK* other = track->GetTrace( m_Brd->m_Track, NULL, FLG_END );
if( other == NULL ) // Test a connection to zones
{
if( track->Type() != PCB_VIA_T )
{
zone = m_Brd->HitTestForAnyFilledArea( track->GetEnd(),
track->GetLayer(),
track->GetLayer(),
track->GetNetCode() );
}
else
{
((SEGVIA*)track)->LayerPair( &top_layer, &bottom_layer );
zone = m_Brd->HitTestForAnyFilledArea( track->GetEnd(),
top_layer, bottom_layer,
track->GetNetCode() );
}
}
if ( (other == NULL) && (zone == NULL) )
{
flag_erase |= 0x10;
}
else // segment, via or zone connected to this end
{
track->end = other;
// If a via is connected to this end, test if this via has a second item connected
// if no, remove it with the current segment
if( other && other->Type() == PCB_VIA_T )
{
// search for another segment following the via
track->SetState( BUSY, true );
SEGVIA* via = (SEGVIA*) other;
other = via->GetTrace( m_Brd->m_Track, NULL, FLG_END );
if( other == NULL )
{
via->LayerPair( &top_layer, &bottom_layer );
zone = m_Brd->HitTestForAnyFilledArea( via->GetEnd(),
bottom_layer, top_layer,
via->GetNetCode() );
}
if( (other == NULL) && (zone == NULL) )
flag_erase |= 0x20;
track->SetState( BUSY, false );
}
}
}
if( flag_erase )
{
// remove segment from board
track->DeleteStructure();
// iterate, because a track connected to the deleted track
// is now perhaps now not connected and should be deleted
item_erased = true;
modified = true;
}
}
}
return modified;
}
