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kicad/pcbnew/connect.cpp

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/**
* @file connect.cpp
* @brief Functions to handle existing tracks in ratsnest calculations.
*/
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2012 Jean-Pierre Charras, jean-pierre.charras@ujf-grenoble.fr
* Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
* Copyright (C) 1992-2012 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 <common.h>
#include <pcbcommon.h>
#include <macros.h>
#include <wxBasePcbFrame.h>
#include <pcbnew.h>
// Helper classes to handle connection points
#include <connect.h>
extern void Merge_SubNets_Connected_By_CopperAreas( BOARD* aPcb );
extern void Merge_SubNets_Connected_By_CopperAreas( BOARD* aPcb, int aNetcode );
// Local functions
static void RebuildTrackChain( BOARD* pcb );
CONNECTIONS::CONNECTIONS( BOARD * aBrd )
{
m_brd = aBrd;
}
/* Fills m_sortedPads with all pads that be connected to tracks
* pads are sorted by X coordinate ( and Y coordinates for same X value )
* aNetcode = net code to filter pads or < 0 to put all pads in list
*/
void CONNECTIONS::BuildPadsList( int aNetcode )
{
// Creates sorted pad list if not exists
m_sortedPads.clear();
m_brd->GetSortedPadListByXthenYCoord( m_sortedPads, aNetcode < 0 ? -1 : aNetcode );
}
/* Explores the list of pads and adds to m_PadsConnected member
* of each pad pads connected to
* Here, connections are due to intersecting pads, not tracks
*/
void CONNECTIONS::SearchConnectionsPadsToIntersectingPads()
{
std::vector<CONNECTED_POINT*> candidates;
BuildPadsCandidatesList();
for( unsigned ii = 0; ii < m_sortedPads.size(); ii++ )
{
D_PAD * pad = m_sortedPads[ii];
pad->m_PadsConnected.clear();
candidates.clear();
CollectItemsNearTo( candidates, pad->ShapePos(), pad->GetBoundingRadius() );
// add pads to pad.m_PadsConnected, if they are connected
for( unsigned jj = 0; jj < candidates.size(); jj++ )
{
CONNECTED_POINT * item = candidates[jj];
D_PAD * candidate_pad = item->GetPad();
if( pad == candidate_pad )
continue;
if( (pad->GetLayerMask() & candidate_pad->GetLayerMask()) == 0 )
continue;
if( pad->HitTest( item->GetPoint() ) )
{
pad->m_PadsConnected.push_back( candidate_pad );
}
}
}
}
/* Explores the list of pads
* Adds to m_PadsConnected member of each track the pad(s) connected to
* Adds to m_TracksConnected member of each pad the track(s) connected to
* D_PAD::m_TracksConnected is cleared before adding items
* TRACK::m_PadsConnected is not cleared
*/
void CONNECTIONS::SearchTracksConnectedToPads( bool add_to_padlist, bool add_to_tracklist)
{
std::vector<CONNECTED_POINT*> candidates;
for( unsigned ii = 0; ii < m_sortedPads.size(); ii++ )
{
D_PAD * pad = m_sortedPads[ii];
pad->m_TracksConnected.clear();
candidates.clear();
CollectItemsNearTo( candidates, pad->GetPosition(), pad->GetBoundingRadius() );
// add this pad to track.m_PadsConnected, if it is connected
for( unsigned jj = 0; jj < candidates.size(); jj++ )
{
CONNECTED_POINT* cp_item = candidates[jj];
if( (pad->GetLayerMask() & cp_item->GetTrack()->GetLayerMask()) == 0 )
continue;
if( pad->HitTest( cp_item->GetPoint() ) )
{
if( add_to_padlist )
cp_item->GetTrack()->m_PadsConnected.push_back( pad );
if( add_to_tracklist )
pad->m_TracksConnected.push_back( cp_item->GetTrack() );
}
}
}
}
void CONNECTIONS::CollectItemsNearTo( std::vector<CONNECTED_POINT*>& aList,
const wxPoint& aPosition, int aDistMax )
{
/* Search items in m_Candidates that position is <= aDistMax from aPosition
* (Rectilinear distance)
* m_Candidates is sorted by X then Y values, so a fast binary search is used
* to locate the "best" entry point in list
* The best entry is a pad having its m_Pos.x == (or near) aPosition.x
* All candidates are near this candidate in list
* So from this entry point, a linear search is made to find all candidates
*/
int idxmax = m_candidates.size()-1;
int delta = m_candidates.size();
int idx = 0; // Starting index is the beginning of list
while( delta )
{
// Calculate half size of remaining interval to test.
// Ensure the computed value is not truncated (too small)
if( (delta & 1) && ( delta > 1 ) )
delta++;
delta /= 2;
CONNECTED_POINT& item = m_candidates[idx];
int dist = item.GetPoint().x - aPosition.x;
if( abs(dist) <= aDistMax )
{
break; // A good entry point is found. The list can be scanned from this point.
}
else if( item.GetPoint().x < aPosition.x ) // We should search after this item
{
idx += delta;
if( idx > idxmax )
idx = idxmax;
}
else // We should search before this item
{
idx -= delta;
if( idx < 0 )
idx = 0;
}
}
/* Now explore the candidate list from the "best" entry point found
* (candidate "near" aPosition.x)
* We explore the list until abs(candidate->m_Point.x - aPosition.x) > aDistMax
* because the list is sorted by X position (and for a given X pos, by Y pos)
* Currently a linear search is made because the number of candidates
* having the right X position is usually small
*/
// search next candidates in list
wxPoint diff;
for( int ii = idx; ii <= idxmax; ii++ )
{
CONNECTED_POINT* item = &m_candidates[ii];
diff = item->GetPoint() - aPosition;
if( abs(diff.x) > aDistMax )
break; // Exit: the distance is to long, we cannot find other candidates
if( abs(diff.y) > aDistMax )
continue; // the y distance is to long, but we can find other candidates
// We have here a good candidate: add it
aList.push_back( item );
}
// search previous candidates in list
for( int ii = idx-1; ii >=0; ii-- )
{
CONNECTED_POINT * item = &m_candidates[ii];
diff = item->GetPoint() - aPosition;
if( abs(diff.x) > aDistMax )
break;
if( abs(diff.y) > aDistMax )
continue;
// We have here a good candidate:add it
aList.push_back( item );
}
}
void CONNECTIONS::BuildPadsCandidatesList()
{
m_candidates.clear();
m_candidates.reserve( m_sortedPads.size() );
for( unsigned ii = 0; ii < m_sortedPads.size(); ii++ )
{
D_PAD * pad = m_sortedPads[ii];
CONNECTED_POINT candidate( pad, pad->GetPosition() );
m_candidates.push_back( candidate );
}
}
/* sort function used to sort .m_Connected by X the Y values
* items are sorted by X coordinate value,
* and for same X value, by Y coordinate value.
*/
static bool sortConnectedPointByXthenYCoordinates( const CONNECTED_POINT & aRef,
const CONNECTED_POINT & aTst )
{
if( aRef.GetPoint().x == aTst.GetPoint().x )
return aRef.GetPoint().y < aTst.GetPoint().y;
return aRef.GetPoint().x < aTst.GetPoint().x;
}
void CONNECTIONS::BuildTracksCandidatesList( TRACK * aBegin, TRACK * aEnd)
{
m_candidates.clear();
m_firstTrack = m_lastTrack = aBegin;
unsigned ii = 0;
// Count candidates ( i.e. end points )
for( const TRACK* track = aBegin; track; track = track->Next() )
{
if( track->Type() == PCB_VIA_T )
ii++;
else
ii += 2;
m_lastTrack = track;
if( track == aEnd )
break;
}
// Build candidate list
m_candidates.reserve( ii );
for( TRACK* track = aBegin; track; track = track->Next() )
{
CONNECTED_POINT candidate( track, track->GetStart());
m_candidates.push_back( candidate );
if( track->Type() != PCB_VIA_T )
{
CONNECTED_POINT candidate2( track, track->GetEnd());
m_candidates.push_back( candidate2 );
}
if( track == aEnd )
break;
}
// Sort list by increasing X coordinate,
// and for increasing Y coordinate when items have the same X coordinate
// So candidates to the same location are consecutive in list.
sort( m_candidates.begin(), m_candidates.end(), sortConnectedPointByXthenYCoordinates );
}
/* Populates .m_connected with tracks/vias connected to aTrack
* param aTrack = track or via to use as reference
* For calculation time reason, an exhaustive search cannot be made
* and a proximity search is made:
* Only tracks with one end near one end of aTrack are collected.
* near means dist <= aTrack width / 2
* because with this constraint we can make a fast search in track list
* m_candidates is expected to be populated by the track candidates ends list
*/
int CONNECTIONS::SearchConnectedTracks( const TRACK * aTrack )
{
int count = 0;
m_connected.clear();
LAYER_MSK layerMask = aTrack->GetLayerMask();
// Search for connections to starting point:
#define USE_EXTENDED_SEARCH
#ifdef USE_EXTENDED_SEARCH
int dist_max = aTrack->GetWidth() / 2;
static std::vector<CONNECTED_POINT*> tracks_candidates;
#endif
wxPoint position = aTrack->GetStart();
for( int kk = 0; kk < 2; kk++ )
{
#ifndef USE_EXTENDED_SEARCH
int idx = searchEntryPointInCandidatesList( position );
if ( idx >= 0 )
{
// search after:
for ( unsigned ii = idx; ii < m_candidates.size(); ii ++ )
{
if( m_candidates[ii].GetTrack() == aTrack )
continue;
if( m_candidates[ii].GetPoint() != position )
break;
if( m_candidates[ii].GetTrack()->GetLayerMask() & layerMask )
m_connected.push_back( m_candidates[ii].GetTrack() );
}
// search before:
for ( int ii = idx-1; ii >= 0; ii -- )
{
if( m_candidates[ii].GetTrack() == aTrack )
continue;
if( m_candidates[ii].GetPoint() != position )
break;
if( m_candidates[ii].GetTrack()->GetLayerMask() & layerMask )
m_connected.push_back( m_candidates[ii].GetTrack() );
}
}
#else
tracks_candidates.clear();
CollectItemsNearTo( tracks_candidates, position, dist_max );
for ( unsigned ii = 0; ii < tracks_candidates.size(); ii ++ )
{
TRACK * ctrack = tracks_candidates[ii]->GetTrack();
if( ( ctrack->GetLayerMask() & layerMask ) == 0 )
continue;
if( ctrack == aTrack )
continue;
// We have a good candidate: calculate the actual distance
// between ends, which should be <= dist max.
wxPoint delta = tracks_candidates[ii]->GetPoint() - position;
int dist = KiROUND( EuclideanNorm( delta ) );
if( dist > dist_max )
continue;
m_connected.push_back( ctrack );
}
#endif
// Search for connections to ending point:
if( aTrack->Type() == PCB_VIA_T )
break;
position = aTrack->GetEnd();
}
return count;
}
int CONNECTIONS::searchEntryPointInCandidatesList( const wxPoint & aPoint)
{
// Search the aPoint coordinates in m_Candidates
// m_Candidates is sorted by X then Y values, and a fast binary search is used
int idxmax = m_candidates.size()-1;
int delta = m_candidates.size();
int idx = 0; // Starting index is the beginning of list
while( delta )
{
// Calculate half size of remaining interval to test.
// Ensure the computed value is not truncated (too small)
if( (delta & 1) && ( delta > 1 ) )
delta++;
delta /= 2;
CONNECTED_POINT & candidate = m_candidates[idx];
if( candidate.GetPoint() == aPoint ) // candidate found
{
return idx;
}
// Not found: test the middle of the remaining sub list
if( candidate.GetPoint().x == aPoint.x ) // Must search considering Y coordinate
{
if(candidate.GetPoint().y < aPoint.y) // Must search after this item
{
idx += delta;
if( idx > idxmax )
idx = idxmax;
}
else // Must search before this item
{
idx -= delta;
if( idx < 0 )
idx = 0;
}
}
else if( candidate.GetPoint().x < aPoint.x ) // Must search after this item
{
idx += delta;
if( idx > idxmax )
idx = idxmax;
}
else // Must search before this item
{
idx -= delta;
if( idx < 0 )
idx = 0;
}
}
return -1;
}
/* Used after a track change (delete a track ou add a track)
* Connections to pads are recalculated
* Note also aFirstTrack (and aLastTrack ) can be NULL
*/
void CONNECTIONS::Build_CurrNet_SubNets_Connections( TRACK* aFirstTrack, TRACK* aLastTrack, int aNetcode )
{
m_firstTrack = aFirstTrack; // The first track used to build m_Candidates
m_lastTrack = aLastTrack; // The last track used to build m_Candidates
// Pads subnets are expected already cleared, because this function
// does not know the full list of pads
BuildTracksCandidatesList( aFirstTrack, aLastTrack );
TRACK* curr_track;
for( curr_track = aFirstTrack; curr_track != NULL; curr_track = curr_track->Next() )
{
// Clear track subnet id (Pads subnets are cleared outside this function)
curr_track->SetSubNet( 0 );
curr_track->m_TracksConnected.clear();
curr_track->m_PadsConnected.clear();
// Update connections between tracks:
SearchConnectedTracks( curr_track );
curr_track->m_TracksConnected = m_connected;
if( curr_track == aLastTrack )
break;
}
// Update connections between tracks and pads
BuildPadsList( aNetcode );
SearchTracksConnectedToPads();
// Update connections between intersecting pads (no tracks)
SearchConnectionsPadsToIntersectingPads();
// Creates sub nets (clusters) for the current net:
Propagate_SubNets();
}
/**
* Change a subnet value to a new value, in m_sortedPads pad list
* After that, 2 cluster (or subnets) are merged into only one.
* Note: the resulting subnet value is the smallest between aOldSubNet et aNewSubNet
*/
int CONNECTIONS::Merge_PadsSubNets( int aOldSubNet, int aNewSubNet )
{
int change_count = 0;
if( aOldSubNet == aNewSubNet )
return 0;
if( (aOldSubNet > 0) && (aOldSubNet < aNewSubNet) )
EXCHG( aOldSubNet, aNewSubNet );
// Examine connections between intersecting pads
for( unsigned ii = 0; ii < m_sortedPads.size(); ii++ )
{
D_PAD * curr_pad = m_sortedPads[ii];
if( curr_pad->GetSubNet() != aOldSubNet )
continue;
change_count++;
curr_pad->SetSubNet( aNewSubNet );
}
return change_count;
}
/*
* Change a subnet value to a new value, for tracks and pads which are connected to.
* The result is merging 2 clusters (or subnets) into only one cluster.
* Note: the resulting sub net value is the smallest between aOldSubNet et aNewSubNet
*/
int CONNECTIONS::Merge_SubNets( int aOldSubNet, int aNewSubNet )
{
TRACK* curr_track;
int change_count = 0;
if( aOldSubNet == aNewSubNet )
return 0;
if( (aOldSubNet > 0) && (aOldSubNet < aNewSubNet) )
EXCHG( aOldSubNet, aNewSubNet );
curr_track = (TRACK*)m_firstTrack;
for( ; curr_track != NULL; curr_track = curr_track->Next() )
{
if( curr_track->GetSubNet() != aOldSubNet )
{
if( curr_track == m_lastTrack )
break;
continue;
}
change_count++;
curr_track->SetSubNet( aNewSubNet );
for( unsigned ii = 0; ii < curr_track->m_PadsConnected.size(); ii++ )
{
D_PAD * pad = curr_track->m_PadsConnected[ii];
if( pad->GetSubNet() == aOldSubNet )
{
pad->SetSubNet( curr_track->GetSubNet() );
}
}
if( curr_track == m_lastTrack )
break;
}
return change_count;
}
/* Test a list of track segments, to create or propagate a sub netcode to pads and
* segments connected together.
* The track list must be sorted by nets, and all segments
* from m_firstTrack to m_lastTrack have the same net
* When 2 items are connected (a track to a pad, or a track to an other track),
* they are grouped in a cluster.
* The .m_Subnet member is the cluster identifier (subnet id)
* For a given net, if all tracks are created, there is only one cluster.
* but if not all tracks are created, there are more than one cluster,
* and some ratsnests will be left active.
* A ratsnest is active when it "connect" 2 items having different subnet id
*/
void CONNECTIONS::Propagate_SubNets()
{
int sub_netcode = 1;
TRACK* curr_track = (TRACK*)m_firstTrack;
if( curr_track )
curr_track->SetSubNet( sub_netcode );
// Examine connections between tracks and pads
for( ; curr_track != NULL; curr_track = curr_track->Next() )
{
// First: handling connections to pads
for( unsigned ii = 0; ii < curr_track->m_PadsConnected.size(); ii++ )
{
D_PAD * pad = curr_track->m_PadsConnected[ii];
if( curr_track->GetSubNet() ) // the track segment is already a cluster member
{
if( pad->GetSubNet() > 0 )
{
// The pad is already a cluster member, so we can merge the 2 clusters
Merge_SubNets( pad->GetSubNet(), curr_track->GetSubNet() );
}
else
{
/* The pad is not yet attached to a cluster , so we can add this pad to
* the cluster */
pad->SetSubNet( curr_track->GetSubNet() );
}
}
else // the track segment is not attached to a cluster
{
if( pad->GetSubNet() > 0 )
{
// it is connected to a pad in a cluster, merge this track
curr_track->SetSubNet( pad->GetSubNet() );
}
else
{
/* it is connected to a pad not in a cluster, so we must create a new
* cluster (only with the 2 items: the track and the pad) */
sub_netcode++;
curr_track->SetSubNet( sub_netcode );
pad->SetSubNet( curr_track->GetSubNet() );
}
}
}
// Test connections between segments
for( unsigned ii = 0; ii < curr_track->m_TracksConnected.size(); ii++ )
{
BOARD_CONNECTED_ITEM* track = curr_track->m_TracksConnected[ii];
if( curr_track->GetSubNet() ) // The current track is already a cluster member
{
// The other track is already a cluster member, so we can merge the 2 clusters
if( track->GetSubNet() )
{
Merge_SubNets( track->GetSubNet(), curr_track->GetSubNet() );
}
else
{
/* The other track is not yet attached to a cluster , so we can add this
* other track to the cluster */
track->SetSubNet( curr_track->GetSubNet() );
}
}
else // the current track segment is not yet attached to a cluster
{
if( track->GetSubNet() )
{
// The other track is already a cluster member, so we can add
// the current segment to the cluster
curr_track->SetSubNet( track->GetSubNet() );
}
else
{
/* it is connected to an other segment not in a cluster, so we must
* create a new cluster (only with the 2 track segments) */
sub_netcode++;
curr_track->SetSubNet( sub_netcode );
track->SetSubNet( curr_track->GetSubNet() );
}
}
}
if( curr_track == m_lastTrack )
break;
}
// Examine connections between intersecting pads, and propagate
// sub_netcodes to intersecting pads
for( unsigned ii = 0; ii < m_sortedPads.size(); ii++ )
{
D_PAD * curr_pad = m_sortedPads[ii];
for( unsigned jj = 0; jj < curr_pad->m_PadsConnected.size(); jj++ )
{
D_PAD * pad = curr_pad->m_PadsConnected[jj];
if( curr_pad->GetSubNet() ) // the current pad is already attached to a cluster
{
if( pad->GetSubNet() > 0 )
{
// The pad is already a cluster member, so we can merge the 2 clusters
// Store the initial subnets, which will be modified by Merge_PadsSubNets
int subnet1 = pad->GetSubNet();
int subnet2 = curr_pad->GetSubNet();
// merge subnets of pads only, even those not connected by tracks
Merge_PadsSubNets( subnet1, subnet2 );
// merge subnets of tracks (and pads, which are already merged)
Merge_SubNets( subnet1, subnet2 );
}
else
{
// The pad is not yet attached to a cluster,
// so we can add this pad to the cluster
pad->SetSubNet( curr_pad->GetSubNet() );
}
}
else // the current pad is not attached to a cluster
{
if( pad->GetSubNet() > 0 )
{
// the connected pad is in a cluster,
// so we can add the current pad to the cluster
curr_pad->SetSubNet( pad->GetSubNet() );
}
else
{
// the connected pad is not in a cluster,
// so we must create a new cluster, with the 2 pads.
sub_netcode++;
curr_pad->SetSubNet( sub_netcode );
pad->SetSubNet( curr_pad->GetSubNet() );
}
}
}
}
}
/*
* Test all connections of the board,
* and update subnet variable of pads and tracks
* TestForActiveLinksInRatsnest must be called after this function
* to update active/inactive ratsnest items status
*/
void PCB_BASE_FRAME::TestConnections()
{
// Clear the cluster identifier for all pads
for( unsigned i = 0; i< m_Pcb->GetPadCount(); ++i )
{
D_PAD* pad = m_Pcb->GetPad(i);
pad->SetZoneSubNet( 0 );
pad->SetSubNet( 0 );
}
m_Pcb->Test_Connections_To_Copper_Areas();
// Test existing connections net by net
// note some nets can have no tracks, and pads intersecting
// so Build_CurrNet_SubNets_Connections must be called for each net
CONNECTIONS connections( m_Pcb );
int last_net_tested = 0;
int current_net_code = 0;
for( TRACK* track = m_Pcb->m_Track; track; )
{
// At this point, track is the first track of a given net
current_net_code = track->GetNetCode();
// Get last track of the current net
TRACK* lastTrack = track->GetEndNetCode( current_net_code );
if( current_net_code > 0 ) // do not spend time if net code = 0 ( dummy net )
{
// Test all previous nets having no tracks
for( int net = last_net_tested+1; net < current_net_code; net++ )
connections.Build_CurrNet_SubNets_Connections( NULL, NULL, net );
connections.Build_CurrNet_SubNets_Connections( track, lastTrack, current_net_code );
last_net_tested = current_net_code;
}
track = lastTrack->Next(); // this is now the first track of the next net
}
// Test last nets without tracks, if any
int netsCount = m_Pcb->GetNetCount();
for( int net = last_net_tested+1; net < netsCount; net++ )
connections.Build_CurrNet_SubNets_Connections( NULL, NULL, net );
Merge_SubNets_Connected_By_CopperAreas( m_Pcb );
return;
}
void PCB_BASE_FRAME::TestNetConnection( wxDC* aDC, int aNetCode )
{
wxString msg;
if( aNetCode <= 0 ) // -1 = not existing net, 0 = dummy net
return;
if( (m_Pcb->m_Status_Pcb & LISTE_RATSNEST_ITEM_OK) == 0 )
Compile_Ratsnest( aDC, true );
// Clear the cluster identifier (subnet) of pads for this net
for( unsigned i = 0; i < m_Pcb->GetPadCount(); ++i )
{
D_PAD* pad = m_Pcb->GetPad(i);
int pad_net_code = pad->GetNetCode();
if( pad_net_code < aNetCode )
continue;
if( pad_net_code > aNetCode )
break;
pad->SetSubNet( 0 );
}
m_Pcb->Test_Connections_To_Copper_Areas( aNetCode );
// Search for the first and the last segment relative to the given net code
if( m_Pcb->m_Track )
{
CONNECTIONS connections( m_Pcb );
TRACK* firstTrack;
TRACK* lastTrack = NULL;
firstTrack = m_Pcb->m_Track.GetFirst()->GetStartNetCode( aNetCode );
if( firstTrack )
lastTrack = firstTrack->GetEndNetCode( aNetCode );
if( firstTrack && lastTrack ) // i.e. if there are segments
{
connections.Build_CurrNet_SubNets_Connections( firstTrack, lastTrack, firstTrack->GetNetCode() );
}
}
Merge_SubNets_Connected_By_CopperAreas( m_Pcb, aNetCode );
// rebuild the active ratsnest for this net
DrawGeneralRatsnest( aDC, aNetCode );
TestForActiveLinksInRatsnest( aNetCode );
DrawGeneralRatsnest( aDC, aNetCode );
// Display results
int net_notconnected_count = 0;
NETINFO_ITEM* net = m_Pcb->FindNet( aNetCode );
if( net ) // Should not occur, but ...
{
for( unsigned ii = net->m_RatsnestStartIdx; ii < net->m_RatsnestEndIdx; ii++ )
{
if( m_Pcb->m_FullRatsnest[ii].IsActive() )
net_notconnected_count++;
}
msg.Printf( wxT( "links %d nc %d net:nc %d" ),
m_Pcb->GetRatsnestsCount(), m_Pcb->GetUnconnectedNetCount(),
net_notconnected_count );
}
else
msg.Printf( wxT( "net not found: netcode %d" ),aNetCode );
SetStatusText( msg );
return;
}
/* search connections between tracks and pads and propagate pad net codes to the track
* segments.
* Pads netcodes are assumed to be up to date.
*/
void PCB_BASE_FRAME::RecalculateAllTracksNetcode()
{
TRACK* curr_track;
// Build the net info list
GetBoard()->BuildListOfNets();
// Reset variables and flags used in computation
curr_track = m_Pcb->m_Track;
for( ; curr_track != NULL; curr_track = curr_track->Next() )
{
curr_track->m_TracksConnected.clear();
curr_track->m_PadsConnected.clear();
curr_track->start = NULL;
curr_track->end = NULL;
curr_track->SetState( BUSY | IN_EDIT | BEGIN_ONPAD | END_ONPAD, false );
curr_track->SetZoneSubNet( 0 );
curr_track->SetNetCode( NETINFO_LIST::UNCONNECTED );
}
// If no pad, reset pointers and netcode, and do nothing else
if( m_Pcb->GetPadCount() == 0 )
return;
CONNECTIONS connections( m_Pcb );
connections.BuildPadsList();
connections.BuildTracksCandidatesList(m_Pcb->m_Track);
// First pass: build connections between track segments and pads.
connections.SearchTracksConnectedToPads();
/* For tracks connected to at least one pad,
* set the track net code to the pad netcode
*/
curr_track = m_Pcb->m_Track;
for( ; curr_track != NULL; curr_track = curr_track->Next() )
{
if( curr_track->m_PadsConnected.size() )
curr_track->SetNetCode( curr_track->m_PadsConnected[0]->GetNetCode() );
}
// Pass 2: build connections between track ends
for( curr_track = m_Pcb->m_Track; curr_track != NULL; curr_track = curr_track->Next() )
{
connections.SearchConnectedTracks( curr_track );
connections.GetConnectedTracks( curr_track );
}
// Propagate net codes from a segment to other connected segments
bool new_pass_request = true; // set to true if a track has its netcode changed from 0
// to a known netcode to re-evaluate netcodes
// of connected items
while( new_pass_request )
{
new_pass_request = false;
for( curr_track = m_Pcb->m_Track; curr_track; curr_track = curr_track->Next() )
{
int netcode = curr_track->GetNetCode();
if( netcode == 0 )
{ // try to find a connected item having a netcode
for( unsigned kk = 0; kk < curr_track->m_TracksConnected.size(); kk++ )
{
int altnetcode = curr_track->m_TracksConnected[kk]->GetNetCode();
if( altnetcode )
{
new_pass_request = true;
netcode = altnetcode;
curr_track->SetNetCode(netcode);
break;
}
}
}
if( netcode ) // this track has a netcode
{ // propagate this netcode to connected tracks having no netcode
for( unsigned kk = 0; kk < curr_track->m_TracksConnected.size(); kk++ )
{
int altnetcode = curr_track->m_TracksConnected[kk]->GetNetCode();
if( altnetcode == 0 )
{
curr_track->m_TracksConnected[kk]->SetNetCode(netcode);
new_pass_request = true;
}
}
}
}
}
// Sort the track list by net codes:
RebuildTrackChain( m_Pcb );
}
/*
* Function SortTracksByNetCode used in RebuildTrackChain()
* to sort track segments by net code.
*/
static bool SortTracksByNetCode( const TRACK* const & ref, const TRACK* const & compare )
{
// For items having the same Net, keep the order in list
if( ref->GetNetCode() == compare->GetNetCode())
return ref->m_Param < compare->m_Param;
return ref->GetNetCode() < compare->GetNetCode();
}
/**
* Helper function RebuildTrackChain
* rebuilds the track segment linked list in order to have a chain
* sorted by increasing netcodes.
* We try to keep order of track segments in list, when possible
* @param pcb = board to rebuild
*/
static void RebuildTrackChain( BOARD* pcb )
{
if( pcb->m_Track == NULL )
return;
int item_count = pcb->m_Track.GetCount();
std::vector<TRACK*> trackList;
trackList.reserve( item_count );
// Put track list in a temporary list to sort tracks by netcode
// We try to keep the initial order of track segments in list, when possible
// so we use m_Param (a member variable used for temporary storage)
// to temporary keep trace of the order of segments
// The sort function uses this variable to sort items that
// have the same net code.
// Without this, during sorting, the initial order is sometimes lost
// by the sort algorithm
for( int ii = 0; ii < item_count; ++ii )
{
pcb->m_Track->m_Param = ii;
trackList.push_back( pcb->m_Track.PopFront() );
}
// the list is empty now
wxASSERT( pcb->m_Track == NULL && pcb->m_Track.GetCount()==0 );
sort( trackList.begin(), trackList.end(), SortTracksByNetCode );
// add them back to the list
for( int i = 0; i < item_count; ++i )
pcb->m_Track.PushBack( trackList[i] );
}
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