connectivity_items.cpp

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/*
 * This program source code file is part of KICAD, a free EDA CAD application.
 *
 * Copyright (C) 2016-2018 CERN
 * Copyright (C) 2019-2022 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @author Tomasz Wlostowski <[email protected]>
 *
 * 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 <core/kicad_algo.h>
#include <macros.h>
#include <connectivity/connectivity_items.h>
#include <trigo.h>
 
#include <wx/log.h>
 
int CN_ITEM::AnchorCount() const
{
 if( !m_valid )
 return 0;
 
 switch( m_parent->Type() )
 {
 case PCB_TRACE_T:
 case PCB_ARC_T:
 return 2; // start and end
 
 case PCB_SHAPE_T:
 return m_anchors.size();
 
 default:
 return 1;
 }
}
 
 
const VECTOR2I CN_ITEM::GetAnchor( int n ) const
{
 if( !m_valid )
 return VECTOR2I();
 
 switch( m_parent->Type() )
 {
 case PCB_PAD_T:
 return static_cast<PAD*>( m_parent )->GetPosition();
 
 case PCB_TRACE_T:
 case PCB_ARC_T:
 if( n == 0 )
 return static_cast<const PCB_TRACK*>( m_parent )->GetStart();
 else
 return static_cast<const PCB_TRACK*>( m_parent )->GetEnd();
 
 case PCB_VIA_T:
 return static_cast<const PCB_VIA*>( m_parent )->GetStart();
 
 case PCB_SHAPE_T:
 return ( n < static_cast<int>( m_anchors.size() ) ) ? m_anchors[n]->Pos() : VECTOR2I();
 
 default:
 UNIMPLEMENTED_FOR( m_parent->GetClass() );
 return VECTOR2I();
 }
}
 
 
void CN_ITEM::Dump()
{
 wxLogDebug(" valid: %d, connected: \n", !!Valid());
 
 for( CN_ITEM* i : m_connected )
 {
 PCB_TRACK* t = static_cast<PCB_TRACK*>( i->Parent() );
 wxLogDebug( wxT( " - %p %d\n" ), t, t->Type() );
 }
}
 
 
int CN_ZONE_LAYER::AnchorCount() const
{
 if( !Valid() )
 return 0;
 
 const ZONE* zone = static_cast<const ZONE*>( Parent() );
 
 return zone->GetFilledPolysList( m_layer )->COutline( m_subpolyIndex ).PointCount() ? 1 : 0;
}
 
 
const VECTOR2I CN_ZONE_LAYER::GetAnchor( int n ) const
{
 if( !Valid() )
 return VECTOR2I();
 
 const ZONE* zone = static_cast<const ZONE*>( Parent() );
 
 return zone->GetFilledPolysList( m_layer )->COutline( m_subpolyIndex ).CPoint( 0 );
}
 
 
bool CN_ZONE_LAYER::HasSingleConnection()
{
 int count = 0;
 
 for( CN_ITEM* item : ConnectedItems() )
 {
 if( item->Valid() )
 count++;
 
 if( count > 1 )
 break;
 }
 
 return count == 1;
}
 
 
void CN_ITEM::RemoveInvalidRefs()
{
 for( auto it = m_connected.begin(); it != m_connected.end(); /* increment in loop */ )
 {
 if( !(*it)->Valid() )
 it = m_connected.erase( it );
 else
 ++it;
 }
}
 
 
CN_ITEM* CN_LIST::Add( PAD* pad )
 {
 if( !pad->IsOnCopperLayer() )
 return nullptr;
 
 auto item = new CN_ITEM( pad, false, 1 );
 item->AddAnchor( pad->ShapePos() );
 item->SetLayers( LAYER_RANGE( F_Cu, B_Cu ) );
 
 switch( pad->GetAttribute() )
 {
 case PAD_ATTRIB::SMD:
 case PAD_ATTRIB::NPTH:
 case PAD_ATTRIB::CONN:
 {
 LSET lmsk = pad->GetLayerSet();
 
 for( int i = 0; i <= MAX_CU_LAYERS; i++ )
 {
 if( lmsk[i] )
 {
 item->SetLayer( i );
 break;
 }
 }
 break;
 }
 default:
 break;
 }
 
 addItemtoTree( item );
 m_items.push_back( item );
 SetDirty();
 return item;
}
 
 
CN_ITEM* CN_LIST::Add( PCB_TRACK* track )
{
 CN_ITEM* item = new CN_ITEM( track, true );
 m_items.push_back( item );
 item->AddAnchor( track->GetStart() );
 item->AddAnchor( track->GetEnd() );
 item->SetLayer( track->GetLayer() );
 addItemtoTree( item );
 SetDirty();
 return item;
}
 
 
CN_ITEM* CN_LIST::Add( PCB_ARC* aArc )
{
 CN_ITEM* item = new CN_ITEM( aArc, true );
 m_items.push_back( item );
 item->AddAnchor( aArc->GetStart() );
 item->AddAnchor( aArc->GetEnd() );
 item->SetLayer( aArc->GetLayer() );
 addItemtoTree( item );
 SetDirty();
 return item;
}
 
 
CN_ITEM* CN_LIST::Add( PCB_VIA* via )
{
 CN_ITEM* item = new CN_ITEM( via, !via->GetIsFree(), 1 );
 
 m_items.push_back( item );
 item->AddAnchor( via->GetStart() );
 
 item->SetLayers( LAYER_RANGE( via->TopLayer(), via->BottomLayer() ) );
 addItemtoTree( item );
 SetDirty();
 return item;
}
 
 
const std::vector<CN_ITEM*> CN_LIST::Add( ZONE* zone, PCB_LAYER_ID aLayer )
{
 const std::shared_ptr<SHAPE_POLY_SET>& polys = zone->GetFilledPolysList( aLayer );
 
 std::vector<CN_ITEM*> rv;
 
 for( int j = 0; j < polys->OutlineCount(); j++ )
 {
 CN_ZONE_LAYER* zitem = new CN_ZONE_LAYER( zone, aLayer, j );
 
 zitem->BuildRTree();
 
 for( const VECTOR2I& pt : zone->GetFilledPolysList( aLayer )->COutline( j ).CPoints() )
 zitem->AddAnchor( pt );
 
 rv.push_back( Add( zitem ) );
 }
 
 return rv;
}
 
 
CN_ITEM* CN_LIST::Add( CN_ZONE_LAYER* zitem )
{
 m_items.push_back( zitem );
 addItemtoTree( zitem );
 SetDirty();
 return zitem;
}
 
 
CN_ITEM* CN_LIST::Add( PCB_SHAPE* shape )
{
 CN_ITEM* item = new CN_ITEM( shape, true );
 m_items.push_back( item );
 
 for( const VECTOR2I& point : shape->GetConnectionPoints() )
 item->AddAnchor( point );
 
 item->SetLayer( shape->GetLayer() );
 addItemtoTree( item );
 SetDirty();
 return item;
}
 
 
void CN_LIST::RemoveInvalidItems( std::vector<CN_ITEM*>& aGarbage )
{
 if( !m_hasInvalid )
 return;
 
 auto lastItem = std::remove_if( m_items.begin(), m_items.end(),
 [&aGarbage]( CN_ITEM* item )
 {
 if( !item->Valid() )
 {
 aGarbage.push_back ( item );
 return true;
 }
 
 return false;
 } );
 
 m_items.resize( lastItem - m_items.begin() );
 
 for( CN_ITEM* item : aGarbage )
 m_index.Remove( item );
 
 m_hasInvalid = false;
}
 
 
BOARD_CONNECTED_ITEM* CN_ANCHOR::Parent() const
{
 assert( m_item->Valid() );
 return m_item->Parent();
}
 
 
bool CN_ANCHOR::Valid() const
{
 if( !m_item )
 return false;
 
 return m_item->Valid();
}
 
 
bool CN_ANCHOR::Dirty() const
{
 return !Valid() || m_item->Dirty();
}
 
 
bool CN_ANCHOR::IsDangling() const
{
 int accuracy = 0;
 
 if( !m_cluster )
 return true;
 
 // the minimal number of items connected to item_ref
 // at this anchor point to decide the anchor is *not* dangling
 size_t minimal_count = 1;
 size_t connected_count = m_item->ConnectedItems().size();
 
 // a via can be removed if connected to only one other item.
 if( Parent()->Type() == PCB_VIA_T )
 return connected_count < 2;
 
 if( m_item->AnchorCount() == 1 )
 return connected_count < minimal_count;
 
 if( Parent()->Type() == PCB_TRACE_T || Parent()->Type() == PCB_ARC_T )
 {
 accuracy = KiROUND( static_cast<const PCB_TRACK*>( Parent() )->GetWidth() / 2 );
 }
 else if( Parent()->Type() == PCB_SHAPE_T )
 {
 auto shape = static_cast<const PCB_SHAPE*>( Parent() );
 
 if( !shape->IsFilled() )
 accuracy = KiROUND( shape->GetWidth() / 2 );
 }
 
 // Items with multiple anchors have usually items connected to each anchor.
 // We want only the item count of this anchor point
 connected_count = 0;
 
 for( CN_ITEM* item : m_item->ConnectedItems() )
 {
 if( item->Parent()->Type() == PCB_ZONE_T )
 {
 ZONE* zone = static_cast<ZONE*>( item->Parent() );
 
 if( zone->HitTestFilledArea( ToLAYER_ID( item->Layer() ), Pos(), accuracy ) )
 connected_count++;
 }
 else if( item->Parent()->HitTest( Pos(), accuracy ) )
 {
 connected_count++;
 }
 }
 
 return connected_count < minimal_count;
}
 
 
int CN_ANCHOR::ConnectedItemsCount() const
{
 if( !m_cluster )
 return 0;
 
 int connected_count = 0;
 
 for( CN_ITEM* item : m_item->ConnectedItems() )
 {
 if( item->Parent()->Type() == PCB_ZONE_T )
 {
 ZONE* zone = static_cast<ZONE*>( item->Parent() );
 
 if( zone->HitTestFilledArea( ToLAYER_ID( item->Layer() ), Pos() ) )
 connected_count++;
 }
 else if( item->Parent()->HitTest( Pos() ) )
 {
 connected_count++;
 }
 }
 
 return connected_count;
}
 
 
CN_CLUSTER::CN_CLUSTER()
{
 m_items.reserve( 64 );
 m_originPad = nullptr;
 m_originNet = -1;
 m_conflicting = false;
}
 
 
CN_CLUSTER::~CN_CLUSTER()
{
}
 
 
wxString CN_CLUSTER::OriginNetName() const
{
 if( !m_originPad || !m_originPad->Valid() )
 return "<none>";
 else
 return m_originPad->Parent()->GetNetname();
}
 
 
bool CN_CLUSTER::Contains( const CN_ITEM* aItem )
{
 return alg::contains( m_items, aItem );
}
 
 
bool CN_CLUSTER::Contains( const BOARD_CONNECTED_ITEM* aItem )
{
 return std::find_if( m_items.begin(), m_items.end(),
 [&aItem]( const CN_ITEM* item )
 {
 return item->Valid() && item->Parent() == aItem;
 } ) != m_items.end();
}
 
 
void CN_CLUSTER::Dump()
{
 for( CN_ITEM* item : m_items )
 {
 wxLogTrace( wxT( "CN" ), wxT( " - item : %p bitem : %p type : %d inet %s\n" ),
 item,
 item->Parent(),
 item->Parent()->Type(),
 (const char*) item->Parent()->GetNetname().c_str() );
 wxLogTrace( wxT( "CN" ), wxT( "- item : %p bitem : %p type : %d inet %s\n" ),
 item,
 item->Parent(),
 item->Parent()->Type(),
 (const char*) item->Parent()->GetNetname().c_str() );
 item->Dump();
 }
}
 
 
void CN_CLUSTER::Add( CN_ITEM* item )
{
 m_items.push_back( item );
 
 int netCode = item->Net();
 
 if( netCode <= 0 )
 return;
 
 if( m_originNet <= 0 )
 {
 m_originNet = netCode;
 m_netRanks[m_originNet] = 0;
 }
 
 if( item->Parent()->Type() == PCB_PAD_T && !static_cast<PAD*>( item->Parent() )->IsFreePad() )
 {
 int rank;
 auto it = m_netRanks.find( netCode );
 
 if( it == m_netRanks.end() )
 {
 m_netRanks[netCode] = 1;
 rank = 1;
 }
 else
 {
 it->second++;
 rank = it->second;
 }
 
 if( !m_originPad || rank > m_netRanks[m_originNet] )
 {
 m_originPad = item;
 m_originNet = netCode;
 }
 
 if( m_originPad && item->Net() != m_originNet )
 m_conflicting = true;
 }
}