kicad/pcbnew/zones_polygons_test_connect...

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/**
* @file zones_polygons_test_connections.cpp
*/
/*
* 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) 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 <algorithm> // sort
#include <fctsys.h>
#include <common.h>
#include <macros.h>
#include <class_board.h>
#include <class_module.h>
#include <class_track.h>
#include <class_zone.h>
#include <pcbnew.h>
#include <zones.h>
#include <polygon_test_point_inside.h>
static bool CmpZoneSubnetValue( const BOARD_CONNECTED_ITEM* a, const BOARD_CONNECTED_ITEM* b );
void Merge_SubNets_Connected_By_CopperAreas( BOARD* aPcb, int aNetcode );
// This helper function sort a list of zones by netcode,
// and for a given netcode by zone size
// zone size = size of the m_FilledPolysList buffer
bool sort_areas( const ZONE_CONTAINER* ref, const ZONE_CONTAINER* tst )
{
if( ref->GetNet() == tst->GetNet() )
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return ref->GetFilledPolysList().size() < tst->GetFilledPolysList().size();
else
return ref->GetNet() < tst->GetNet();
}
/**
* Function Test_Connection_To_Copper_Areas
* init .m_ZoneSubnet parameter in tracks and pads according to the connections to areas found
* @param aNetcode = netcode to analyse. if -1, analyse all nets
*/
void BOARD::Test_Connections_To_Copper_Areas( int aNetcode )
{
// list of pads and tracks candidates on this layer and on this net.
// It is static to avoid multiple memory realloc.
static std::vector <BOARD_CONNECTED_ITEM*> Candidates;
// clear .m_ZoneSubnet parameter for pads
for( MODULE* module = m_Modules; module; module = module->Next() )
{
for( D_PAD* pad = module->m_Pads; pad != NULL; pad = pad->Next() )
if( (aNetcode < 0) || ( aNetcode == pad->GetNet() ) )
pad->SetZoneSubNet( 0 );
}
// clear .m_ZoneSubnet parameter for tracks and vias
for( TRACK* track = m_Track; track; track = track->Next() )
{
if( (aNetcode < 0) || ( aNetcode == track->GetNet() ) )
track->SetZoneSubNet( 0 );
}
// examine all zones, net by net:
int subnet = 0;
// Build zones candidates list
std::vector<ZONE_CONTAINER*> zones_candidates;
for( int index = 0; index < GetAreaCount(); index++ )
{
ZONE_CONTAINER* curr_zone = GetArea( index );
if( !curr_zone->IsOnCopperLayer() )
continue;
if( (aNetcode >= 0) && ( aNetcode != curr_zone->GetNet() ) )
continue;
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if( curr_zone->GetFilledPolysList().size() == 0 )
continue;
zones_candidates.push_back(curr_zone);
}
// sort them by netcode then vertices count.
// For a given net, examine the smaller zones first slightly speed up calculation
// (25% faster)
// this is only noticeable with very large boards and depends on board zones topology
// This is due to the fact some items are connected bt small zones ares,
// before examining large zones areas and these items are not tested after a connection is found
sort(zones_candidates.begin(), zones_candidates.end(), sort_areas );
int oldnetcode = -1;
for( unsigned idx = 0; idx < zones_candidates.size(); idx++ )
{
ZONE_CONTAINER* curr_zone = zones_candidates[idx];
int netcode = curr_zone->GetNet();
// Build a list of candidates connected to the net:
// At this point, layers are not considered, because areas on different layers can
// be connected by a via or a pad.
// (because zones are sorted by netcode, there is made only once per net)
NETINFO_ITEM* net = FindNet( netcode );
wxASSERT( net );
if( net == NULL )
continue;
if( oldnetcode != netcode )
{
oldnetcode = netcode;
Candidates.clear();
// Build the list of pads candidates connected to the net:
Candidates.reserve( net->m_PadInNetList.size() );
for( unsigned ii = 0; ii < net->m_PadInNetList.size(); ii++ )
Candidates.push_back( net->m_PadInNetList[ii] );
// Build the list of track candidates connected to the net:
TRACK* track = m_Track.GetFirst()->GetStartNetCode( netcode );
for( ; track; track = track->Next() )
{
if( track->GetNet() != netcode )
break;
Candidates.push_back( track );
}
}
// test if a candidate is inside a filled area of this zone
unsigned indexstart = 0, indexend;
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std::vector<CPolyPt> polysList = curr_zone->GetFilledPolysList();
for( indexend = 0; indexend < polysList.size(); indexend++ )
{
// end of a filled sub-area found
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if( polysList[indexend].end_contour )
{
subnet++;
EDA_RECT bbox = curr_zone->CalculateSubAreaBoundaryBox( indexstart, indexend );
for( unsigned ic = 0; ic < Candidates.size(); ic++ )
{ // test if this area is connected to a board item:
BOARD_CONNECTED_ITEM* item = Candidates[ic];
if( item->GetZoneSubNet() == subnet ) // Already merged
continue;
if( !item->IsOnLayer( curr_zone->GetLayer() ) )
continue;
wxPoint pos1, pos2;
if( item->Type() == PCB_PAD_T )
{
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pos1 = pos2 = ( (D_PAD*) item )->GetPosition();
}
else if( item->Type() == PCB_VIA_T )
{
pos1 = pos2 = ( (SEGVIA*) item )->m_Start;
}
else if( item->Type() == PCB_TRACE_T )
{
pos1 = ( (TRACK*) item )->m_Start;
pos2 = ( (TRACK*) item )->m_End;
}
else
{
continue;
}
bool connected = false;
if( bbox.Contains( pos1 ) )
{
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if( TestPointInsidePolygon( polysList, indexstart,
indexend, pos1.x, pos1.y ) )
connected = true;
}
if( !connected && (pos1 != pos2 ) )
{
if( bbox.Contains( pos2 ) )
{
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if( TestPointInsidePolygon( polysList,
indexstart, indexend,
pos2.x, pos2.y ) )
connected = true;
}
}
if( connected )
{ // Set ZoneSubnet to the current subnet value.
// If the previous subnet is not 0, merge all items with old subnet
// to the new one
int old_subnet = item->GetZoneSubNet();
item->SetZoneSubNet( subnet );
// Merge previous subnet with the current
if( (old_subnet > 0) && (old_subnet != subnet) )
{
for( unsigned jj = 0; jj < Candidates.size(); jj++ )
{
BOARD_CONNECTED_ITEM* item_to_merge = Candidates[jj];
if( old_subnet == item_to_merge->GetZoneSubNet() )
item_to_merge->SetZoneSubNet( subnet );
}
} // End if ( old_subnet > 0 )
} // End if( connected )
}
// End test candidates for the current filled area
indexstart = indexend + 1; // prepare test next area, starting at indexend+1
// (if exists). End read one area in
// curr_zone->m_FilledPolysList
}
} // End read all segments in zone
} // End read all zones candidates
}
/**
* Function Merge_SubNets_Connected_By_CopperAreas(BOARD* aPcb)
* Calls Merge_SubNets_Connected_By_CopperAreas( BOARD* aPcb, int aNetcode ) for each
* netcode found in zone list
* @param aPcb = the current board
*/
void Merge_SubNets_Connected_By_CopperAreas( BOARD* aPcb )
{
for( int index = 0; index < aPcb->GetAreaCount(); index++ )
{
ZONE_CONTAINER* curr_zone = aPcb->GetArea( index );
if ( ! curr_zone->IsOnCopperLayer() )
continue;
if ( curr_zone->GetNet() <= 0 )
continue;
Merge_SubNets_Connected_By_CopperAreas( aPcb, curr_zone->GetNet() );
}
}
/**
* Function Merge_SubNets_Connected_By_CopperAreas(BOARD* aPcb, int aNetcode)
* Used after connections by tracks calculations
* Merge subnets, in tracks ans pads when they are connected by a filled copper area
* for pads, this is the .m_physical_connexion member which is tested and modified
* for tracks, this is the .m_Subnet member which is tested and modified
* these members are block numbers (or cluster numbers) for a given net,
* calculated by Build_Pads_Info_Connections_By_Tracks()
* The result is merging 2 blocks (or subnets)
* @param aPcb = the current board
* @param aNetcode = netcode to consider
*/
void Merge_SubNets_Connected_By_CopperAreas( BOARD* aPcb, int aNetcode )
{
// Ensure a zone with the given netcode exists: examine all zones:
bool found = false;
for( int index = 0; index < aPcb->GetAreaCount(); index++ )
{
ZONE_CONTAINER* curr_zone = aPcb->GetArea( index );
if( aNetcode == curr_zone->GetNet() )
{
found = true;
break;
}
}
if( !found ) // No zone with this netcode, therefore no connection by zone
return;
// list of pads and tracks candidates to test:
// It is static to avoid multiple memory realloc.
static std::vector <BOARD_CONNECTED_ITEM*> Candidates;
Candidates.clear();
// Build the list of pads candidates connected to the net:
NETINFO_ITEM* net = aPcb->FindNet( aNetcode );
wxASSERT( net );
Candidates.reserve( net->m_PadInNetList.size() );
for( unsigned ii = 0; ii < net->m_PadInNetList.size(); ii++ )
Candidates.push_back( net->m_PadInNetList[ii] );
// Build the list of track candidates connected to the net:
TRACK* track;
track = aPcb->m_Track.GetFirst()->GetStartNetCode( aNetcode );
for( ; track; track = track->Next() )
{
if( track->GetNet() != aNetcode )
break;
Candidates.push_back( track );
}
if( Candidates.size() == 0 )
return;
int next_subnet_free_number = 0;
for( unsigned ii = 0; ii < Candidates.size(); ii++ )
{
int subnet = Candidates[ii]->GetSubNet();
next_subnet_free_number = std::max( next_subnet_free_number, subnet );
}
next_subnet_free_number++; // This is a subnet we can use with not connected items
// by tracks, but connected by zone.
// Sort by zone_subnet:
sort( Candidates.begin(), Candidates.end(), CmpZoneSubnetValue );
// Some items can be not connected, but they can be connected to a filled area:
// give them a subnet common to these items connected only by the area,
// and not already used.
// a value like next_subnet_free_number+zone_subnet is right
for( unsigned jj = 0; jj < Candidates.size(); jj++ )
{
BOARD_CONNECTED_ITEM* item = Candidates[jj];
if ( item->GetSubNet() == 0 && (item->GetZoneSubNet() > 0) )
{
item->SetSubNet( next_subnet_free_number + item->GetZoneSubNet() );
}
}
// Now, for each zone subnet, we search for 2 items with different subnets.
// if found, the 2 subnet are merged in the whole candidate list.
int old_subnet = 0;
int old_zone_subnet = 0;
for( unsigned ii = 0; ii < Candidates.size(); ii++ )
{
BOARD_CONNECTED_ITEM* item = Candidates[ii];
int zone_subnet = item->GetZoneSubNet();
if( zone_subnet == 0 ) // Not connected by a filled area, skip it
continue;
int subnet = item->GetSubNet();
if( zone_subnet != old_zone_subnet ) // a new zone subnet is found
{
old_subnet = subnet;
old_zone_subnet = zone_subnet;
continue;
}
zone_subnet = old_zone_subnet;
// 2 successive items already from the same cluster: nothing to do
if( subnet == old_subnet )
continue;
// Here we have 2 items connected by the same area have 2 differents subnets: merge subnets
if( (subnet > old_subnet) || ( subnet <= 0) )
EXCHG( subnet, old_subnet );
for( unsigned jj = 0; jj < Candidates.size(); jj++ )
{
BOARD_CONNECTED_ITEM * item_to_merge = Candidates[jj];
if( item_to_merge->GetSubNet() == old_subnet )
item_to_merge->SetSubNet( subnet );
}
old_subnet = subnet;
}
}
/* Compare function used for sorting candidates by increasing zone zubnet
*/
static bool CmpZoneSubnetValue( const BOARD_CONNECTED_ITEM* a, const BOARD_CONNECTED_ITEM* b )
{
int asubnet, bsubnet;
asubnet = a->GetZoneSubNet();
bsubnet = b->GetZoneSubNet();
return asubnet < bsubnet;
}