C++ TRACK::DeleteStructure方法代码示例

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 )
//.........这里部分代码省略.........

//.........这里部分代码省略.........

                    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;
}