drc_test_provider_copper_clearance.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2004-2022 KiCad Developers.
 *
 * 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
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 * 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 <common.h>
#include <math_for_graphics.h>
#include <board_design_settings.h>
#include <footprint.h>
#include <pcb_shape.h>
#include <pad.h>
#include <pcb_track.h>
#include <zone.h>
 
#include <geometry/seg.h>
#include <geometry/shape_poly_set.h>
#include <geometry/shape_segment.h>
 
#include <drc/drc_engine.h>
#include <drc/drc_rtree.h>
#include <drc/drc_item.h>
#include <drc/drc_rule.h>
#include <drc/drc_test_provider_clearance_base.h>
#include <pcb_dimension.h>
 
/*
 Copper clearance test. Checks all copper items (pads, vias, tracks, drawings, zones) for their
 electrical clearance.
 
 Errors generated:
 - DRCE_CLEARANCE
 - DRCE_HOLE_CLEARANCE
 - DRCE_TRACKS_CROSSING
 - DRCE_ZONES_INTERSECT
 - DRCE_SHORTING_ITEMS
*/
 
class DRC_TEST_PROVIDER_COPPER_CLEARANCE : public DRC_TEST_PROVIDER_CLEARANCE_BASE
{
public:
 DRC_TEST_PROVIDER_COPPER_CLEARANCE () :
 DRC_TEST_PROVIDER_CLEARANCE_BASE(),
 m_drcEpsilon( 0 )
 {
 }
 
 virtual ~DRC_TEST_PROVIDER_COPPER_CLEARANCE()
 {
 }
 
 virtual bool Run() override;
 
 virtual const wxString GetName() const override
 {
 return wxT( "clearance" );
 };
 
 virtual const wxString GetDescription() const override
 {
 return wxT( "Tests copper item clearance" );
 }
 
private:
 bool testTrackAgainstItem( PCB_TRACK* track, SHAPE* trackShape, PCB_LAYER_ID layer,
 BOARD_ITEM* other );
 
 void testTrackClearances();
 
 bool testPadAgainstItem( PAD* pad, SHAPE* padShape, PCB_LAYER_ID layer, BOARD_ITEM* other );
 
 void testPadClearances();
 
 void testZonesToZones();
 
 void testItemAgainstZone( BOARD_ITEM* aItem, ZONE* aZone, PCB_LAYER_ID aLayer );
 
private:
 int m_drcEpsilon;
};
 
 
bool DRC_TEST_PROVIDER_COPPER_CLEARANCE::Run()
{
 m_board = m_drcEngine->GetBoard();
 
 if( m_board->m_DRCMaxClearance <= 0 )
 {
 reportAux( wxT( "No Clearance constraints found. Tests not run." ) );
 return true; // continue with other tests
 }
 
 m_drcEpsilon = m_board->GetDesignSettings().GetDRCEpsilon();
 
 if( !m_drcEngine->IsErrorLimitExceeded( DRCE_CLEARANCE ) )
 {
 if( !reportPhase( _( "Checking track & via clearances..." ) ) )
 return false; // DRC cancelled
 
 testTrackClearances();
 }
 else if( !m_drcEngine->IsErrorLimitExceeded( DRCE_HOLE_CLEARANCE ) )
 {
 if( !reportPhase( _( "Checking hole clearances..." ) ) )
 return false; // DRC cancelled
 
 testTrackClearances();
 }
 
 if( !m_drcEngine->IsErrorLimitExceeded( DRCE_CLEARANCE ) )
 {
 if( !reportPhase( _( "Checking pad clearances..." ) ) )
 return false; // DRC cancelled
 
 testPadClearances();
 }
 else if( !m_drcEngine->IsErrorLimitExceeded( DRCE_SHORTING_ITEMS )
 || !m_drcEngine->IsErrorLimitExceeded( DRCE_HOLE_CLEARANCE ) )
 {
 if( !reportPhase( _( "Checking pads..." ) ) )
 return false; // DRC cancelled
 
 testPadClearances();
 }
 
 if( !m_drcEngine->IsErrorLimitExceeded( DRCE_CLEARANCE ) )
 {
 if( !reportPhase( _( "Checking copper zone clearances..." ) ) )
 return false; // DRC cancelled
 
 testZonesToZones();
 }
 else if( !m_drcEngine->IsErrorLimitExceeded( DRCE_ZONES_INTERSECT ) )
 {
 if( !reportPhase( _( "Checking zones..." ) ) )
 return false; // DRC cancelled
 
 testZonesToZones();
 }
 
 reportRuleStatistics();
 
 return !m_drcEngine->IsCancelled();
}
 
 
bool DRC_TEST_PROVIDER_COPPER_CLEARANCE::testTrackAgainstItem( PCB_TRACK* track, SHAPE* trackShape,
 PCB_LAYER_ID layer,
 BOARD_ITEM* other )
{
 bool testClearance = !m_drcEngine->IsErrorLimitExceeded( DRCE_CLEARANCE );
 bool testHoles = !m_drcEngine->IsErrorLimitExceeded( DRCE_HOLE_CLEARANCE );
 DRC_CONSTRAINT constraint;
 int clearance = -1;
 int actual;
 VECTOR2I pos;
 
 std::shared_ptr<SHAPE> otherShape = other->GetEffectiveShape( layer );
 
 if( other->Type() == PCB_PAD_T )
 {
 PAD* pad = static_cast<PAD*>( other );
 
 if( pad->GetAttribute() == PAD_ATTRIB::NPTH && !pad->FlashLayer( layer ) )
 testClearance = false;
 }
 
 if( testClearance )
 {
 constraint = m_drcEngine->EvalRules( CLEARANCE_CONSTRAINT, track, other, layer );
 clearance = constraint.GetValue().Min();
 }
 
 if( constraint.GetSeverity() != RPT_SEVERITY_IGNORE && clearance > 0 )
 {
 // Special processing for track:track intersections
 if( track->Type() == PCB_TRACE_T && other->Type() == PCB_TRACE_T )
 {
 SEG trackSeg( track->GetStart(), track->GetEnd() );
 SEG otherSeg( track->GetStart(), track->GetEnd() );
 
 if( OPT_VECTOR2I intersection = trackSeg.Intersect( otherSeg ) )
 {
 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_TRACKS_CROSSING );
 drcItem->SetItems( track, other );
 drcItem->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drcItem, *intersection, layer );
 
 return m_drcEngine->GetReportAllTrackErrors();
 }
 }
 
 if( trackShape->Collide( otherShape.get(), clearance - m_drcEpsilon, &actual, &pos ) )
 {
 if( m_drcEngine->IsNetTieExclusion( track->GetNetCode(), layer, pos, other ) )
 {
 // Collision occurred as track was entering a pad marked as a net-tie. We
 // allow these.
 }
 else
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_CLEARANCE );
 wxString msg;
 
 msg.Printf( _( "(%s clearance %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( clearance ),
 MessageTextFromValue( actual ) );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 drce->SetItems( track, other );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pos, layer );
 
 if( !m_drcEngine->GetReportAllTrackErrors() )
 return false;
 }
 }
 }
 
 if( testHoles && ( track->HasHole() || other->HasHole() ) )
 {
 std::array<BOARD_ITEM*, 2> a{ track, other };
 std::array<BOARD_ITEM*, 2> b{ other, track };
 std::array<SHAPE*, 2> a_shape{ trackShape, otherShape.get() };
 
 bool has_error = false;
 
 for( size_t ii = 0; ii < 2 && !has_error; ++ii )
 {
 std::shared_ptr<SHAPE_SEGMENT> holeShape;
 
 // We only test a track item here against an item with a hole.
 // If either case is not valid, simply move on
 if( !( dynamic_cast<PCB_TRACK*>( a[ii] ) ) || !b[ii]->HasHole() )
 {
 continue;
 }
 if( b[ii]->Type() == PCB_VIA_T )
 {
 if( b[ii]->GetLayerSet().Contains( layer ) )
 holeShape = b[ii]->GetEffectiveHoleShape();
 }
 else
 {
 holeShape = b[ii]->GetEffectiveHoleShape();
 }
 
 constraint = m_drcEngine->EvalRules( HOLE_CLEARANCE_CONSTRAINT, b[ii], a[ii], layer );
 clearance = constraint.GetValue().Min();
 
 if( constraint.GetSeverity() != RPT_SEVERITY_IGNORE && clearance > 0 )
 {
 if( a_shape[ii]->Collide( holeShape.get(), std::max( 0, clearance - m_drcEpsilon ),
 &actual, &pos ) )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_HOLE_CLEARANCE );
 wxString msg;
 
 msg.Printf( _( "(%s clearance %s; actual %s)" ), constraint.GetName(),
 MessageTextFromValue( clearance ), MessageTextFromValue( actual ) );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 drce->SetItems( a[ii], b[ii] );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pos, layer );
 has_error = true;
 
 if( !m_drcEngine->GetReportAllTrackErrors() )
 return false;
 }
 }
 }
 }
 
 return !m_drcEngine->IsCancelled();
}
 
 
void DRC_TEST_PROVIDER_COPPER_CLEARANCE::testItemAgainstZone( BOARD_ITEM* aItem, ZONE* aZone,
 PCB_LAYER_ID aLayer )
{
 if( !aZone->GetLayerSet().test( aLayer ) )
 return;
 
 if( aZone->GetNetCode() && aItem->IsConnected() )
 {
 if( aZone->GetNetCode() == static_cast<BOARD_CONNECTED_ITEM*>( aItem )->GetNetCode() )
 return;
 }
 
 BOX2I itemBBox = aItem->GetBoundingBox();
 BOX2I worstCaseBBox = itemBBox;
 
 worstCaseBBox.Inflate( m_board->m_DRCMaxClearance );
 
 if( !worstCaseBBox.Intersects( aZone->GetBoundingBox() ) )
 return;
 
 bool testClearance = !m_drcEngine->IsErrorLimitExceeded( DRCE_CLEARANCE );
 bool testHoles = !m_drcEngine->IsErrorLimitExceeded( DRCE_HOLE_CLEARANCE );
 
 if( !testClearance && !testHoles )
 return;
 
 DRC_RTREE* zoneTree = m_board->m_CopperZoneRTreeCache[ aZone ].get();
 
 if( !zoneTree )
 return;
 
 DRC_CONSTRAINT constraint;
 int clearance = -1;
 int actual;
 VECTOR2I pos;
 
 if( aItem->Type() == PCB_PAD_T )
 {
 PAD* pad = static_cast<PAD*>( aItem );
 bool flashedPad = pad->FlashLayer( aLayer );
 bool platedHole = pad->HasHole() && pad->GetAttribute() == PAD_ATTRIB::PTH;
 
 if( !flashedPad && !platedHole )
 testClearance = false;
 }
 
 if( testClearance )
 {
 constraint = m_drcEngine->EvalRules( CLEARANCE_CONSTRAINT, aItem, aZone, aLayer );
 clearance = constraint.GetValue().Min();
 }
 
 if( constraint.GetSeverity() != RPT_SEVERITY_IGNORE && clearance > 0 )
 {
 std::shared_ptr<SHAPE> itemShape = aItem->GetEffectiveShape( aLayer, FLASHING::DEFAULT );
 
 if( zoneTree->QueryColliding( itemBBox, itemShape.get(), aLayer,
 std::max( 0, clearance - m_drcEpsilon ), &actual, &pos ) )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_CLEARANCE );
 wxString msg;
 
 msg.Printf( _( "(%s clearance %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( clearance ),
 MessageTextFromValue( actual ) );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 drce->SetItems( aItem, aZone );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pos, aLayer );
 }
 }
 
 if( testHoles && aItem->HasHole() )
 {
 std::shared_ptr<SHAPE_SEGMENT> holeShape;
 
 if( aItem->Type() == PCB_VIA_T )
 {
 if( aItem->GetLayerSet().Contains( aLayer ) )
 holeShape = aItem->GetEffectiveHoleShape();
 }
 else
 {
 holeShape = aItem->GetEffectiveHoleShape();
 }
 
 if( holeShape )
 {
 constraint = m_drcEngine->EvalRules( HOLE_CLEARANCE_CONSTRAINT, aItem, aZone, aLayer );
 clearance = constraint.GetValue().Min();
 
 if( constraint.GetSeverity() != RPT_SEVERITY_IGNORE && clearance > 0 )
 {
 if( zoneTree->QueryColliding( itemBBox, holeShape.get(), aLayer,
 std::max( 0, clearance - m_drcEpsilon ),
 &actual, &pos ) )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_HOLE_CLEARANCE );
 wxString msg;
 
 msg.Printf( _( "(%s clearance %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( clearance ),
 MessageTextFromValue( actual ) );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 drce->SetItems( aItem, aZone );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pos, aLayer );
 }
 }
 }
 }
}
 
 
void DRC_TEST_PROVIDER_COPPER_CLEARANCE::testTrackClearances()
{
 // This is the number of tests between 2 calls to the progress bar
 const int progressDelta = 100;
 int ii = 0;
 
 reportAux( wxT( "Testing %d tracks & vias..." ), m_board->Tracks().size() );
 
 std::map<BOARD_ITEM*, int> freePadsUsageMap;
 std::unordered_map<PTR_PTR_CACHE_KEY, LSET> checkedPairs;
 
 for( PCB_TRACK* track : m_board->Tracks() )
 {
 if( !reportProgress( ii++, m_board->Tracks().size(), progressDelta ) )
 break;
 
 for( PCB_LAYER_ID layer : LSET( track->GetLayerSet() & LSET::AllCuMask() ).Seq() )
 {
 std::shared_ptr<SHAPE> trackShape = track->GetEffectiveShape( layer );
 
 m_board->m_CopperItemRTreeCache->QueryColliding( track, layer, layer,
 // Filter:
 [&]( BOARD_ITEM* other ) -> bool
 {
 auto otherCItem = dynamic_cast<BOARD_CONNECTED_ITEM*>( other );
 
 if( otherCItem && otherCItem->GetNetCode() == track->GetNetCode() )
 return false;
 
 BOARD_ITEM* a = track;
 BOARD_ITEM* b = other;
 
 // store canonical order so we don't collide in both directions
 // (a:b and b:a)
 if( static_cast<void*>( a ) > static_cast<void*>( b ) )
 std::swap( a, b );
 
 auto it = checkedPairs.find( { a, b } );
 
 if( it != checkedPairs.end() && it->second.test( layer ) )
 {
 return false;
 }
 else
 {
 checkedPairs[ { a, b } ].set( layer );
 return true;
 }
 },
 // Visitor:
 [&]( BOARD_ITEM* other ) -> bool
 {
 if( other->Type() == PCB_PAD_T && static_cast<PAD*>( other )->IsFreePad() )
 {
 if( other->GetEffectiveShape( layer )->Collide( trackShape.get() ) )
 {
 auto it = freePadsUsageMap.find( other );
 
 if( it == freePadsUsageMap.end() )
 {
 freePadsUsageMap[ other ] = track->GetNetCode();
 return false;
 }
 else if( it->second == track->GetNetCode() )
 {
 return false;
 }
 }
 }
 
 return testTrackAgainstItem( track, trackShape.get(), layer, other );
 },
 m_board->m_DRCMaxClearance );
 
 for( ZONE* zone : m_board->m_DRCCopperZones )
 {
 testItemAgainstZone( track, zone, layer );
 
 if( m_drcEngine->IsCancelled() )
 break;
 }
 }
 }
}
 
 
bool DRC_TEST_PROVIDER_COPPER_CLEARANCE::testPadAgainstItem( PAD* pad, SHAPE* padShape,
 PCB_LAYER_ID aLayer,
 BOARD_ITEM* other )
{
 bool testClearance = !m_drcEngine->IsErrorLimitExceeded( DRCE_CLEARANCE );
 bool testShorting = !m_drcEngine->IsErrorLimitExceeded( DRCE_SHORTING_ITEMS );
 bool testHoles = !m_drcEngine->IsErrorLimitExceeded( DRCE_HOLE_CLEARANCE );
 
 // Disable some tests for net-tie objects in a footprint
 if( other->GetParent() == pad->GetParent() )
 {
 FOOTPRINT* fp = static_cast<FOOTPRINT*>( pad->GetParent() );
 std::map<wxString, int> padToNetTieGroupMap = fp->MapPadNumbersToNetTieGroups();
 int padGroupIdx = padToNetTieGroupMap[ pad->GetNumber() ];
 
 if( other->Type() == PCB_PAD_T )
 {
 PAD* otherPad = static_cast<PAD*>( other );
 
 if( padGroupIdx >= 0 && padGroupIdx == padToNetTieGroupMap[ otherPad->GetNumber() ] )
 testClearance = false;
 
 if( pad->SameLogicalPadAs( otherPad ) )
 testHoles = false;
 }
 
 if( other->Type() == PCB_FP_SHAPE_T && padGroupIdx >= 0 )
 testClearance = false;
 }
 
 PAD* otherPad = nullptr;
 PCB_VIA* otherVia = nullptr;
 
 if( other->Type() == PCB_PAD_T )
 otherPad = static_cast<PAD*>( other );
 
 if( other->Type() == PCB_VIA_T )
 otherVia = static_cast<PCB_VIA*>( other );
 
 if( !IsCopperLayer( aLayer ) )
 testClearance = false;
 
 // A NPTH has no cylinder, but it may still have pads on some layers
 if( pad->GetAttribute() == PAD_ATTRIB::NPTH && !pad->FlashLayer( aLayer ) )
 testClearance = false;
 
 if( otherPad && otherPad->GetAttribute() == PAD_ATTRIB::NPTH && !otherPad->FlashLayer( aLayer ) )
 testClearance = false;
 
 // Track clearances are tested in testTrackClearances()
 if( dynamic_cast<PCB_TRACK*>( other) )
 testClearance = false;
 
 int padNet = pad->GetNetCode();
 int otherPadNet = otherPad ? otherPad->GetNetCode() : 0;
 int otherViaNet = otherVia ? otherVia->GetNetCode() : 0;
 
 // Pads and vias of the same (defined) net get a waiver on clearance and hole tests
 if( ( otherPadNet && otherPadNet == padNet ) || ( otherViaNet && otherViaNet == padNet ) )
 {
 testClearance = false;
 testHoles = false;
 }
 
 if( !( pad->GetDrillSize().x > 0 )
 && !( otherPad && otherPad->GetDrillSize().x > 0 )
 && !( otherVia && otherVia->GetDrill() > 0 ) )
 {
 testHoles = false;
 }
 
 if( !testClearance && !testShorting && !testHoles )
 return false;
 
 std::shared_ptr<SHAPE> otherShape = other->GetEffectiveShape( aLayer );
 DRC_CONSTRAINT constraint;
 int clearance;
 int actual;
 VECTOR2I pos;
 
 if( otherPad && pad->SameLogicalPadAs( otherPad ) )
 {
 // If pads are equivalent (ie: from the same footprint with the same pad number)...
 // ... and have nets...
 // then they must be the same net
 if( pad->GetNetCode() && otherPad->GetNetCode()
 && pad->GetNetCode() != otherPad->GetNetCode()
 && testShorting )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_SHORTING_ITEMS );
 wxString msg;
 
 msg.Printf( _( "(nets %s and %s)" ),
 pad->GetNetname(),
  otherPad->GetNetname() );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 drce->SetItems( pad, otherPad );
 
 reportViolation( drce, otherPad->GetPosition(), aLayer );
 }
 
 return !m_drcEngine->IsCancelled();
 }
 
 if( testClearance )
 {
 constraint = m_drcEngine->EvalRules( CLEARANCE_CONSTRAINT, pad, other, aLayer );
 clearance = constraint.GetValue().Min();
 
 if( constraint.GetSeverity() != RPT_SEVERITY_IGNORE && clearance > 0 )
 {
 if( padShape->Collide( otherShape.get(), std::max( 0, clearance - m_drcEpsilon ),
 &actual, &pos ) )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_CLEARANCE );
 wxString msg;
 
 msg.Printf( _( "(%s clearance %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( clearance ),
 MessageTextFromValue( actual ) );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 drce->SetItems( pad, other );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pos, aLayer );
 testHoles = false; // No need for multiple violations
 }
 }
 }
 
 if( testHoles )
 {
 constraint = m_drcEngine->EvalRules( HOLE_CLEARANCE_CONSTRAINT, pad, other, aLayer );
 clearance = constraint.GetValue().Min();
 
 if( constraint.GetSeverity() == RPT_SEVERITY_IGNORE )
 testHoles = false;
 }
 
 if( testHoles && otherPad && pad->FlashLayer( aLayer ) && otherPad->HasHole() )
 {
 if( clearance > 0 && padShape->Collide( otherPad->GetEffectiveHoleShape().get(),
 std::max( 0, clearance - m_drcEpsilon ),
 &actual, &pos ) )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_HOLE_CLEARANCE );
 wxString msg;
 
 msg.Printf( _( "(%s clearance %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( clearance ),
 MessageTextFromValue( actual ) );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 drce->SetItems( pad, other );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pos, aLayer );
 testHoles = false; // No need for multiple violations
 }
 }
 
 if( testHoles && otherPad && otherPad->FlashLayer( aLayer ) && pad->HasHole() )
 {
 if( clearance > 0 && otherShape->Collide( pad->GetEffectiveHoleShape().get(),
 std::max( 0, clearance - m_drcEpsilon ),
 &actual, &pos ) )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_HOLE_CLEARANCE );
 wxString msg;
 
 msg.Printf( _( "(%s clearance %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( clearance ),
 MessageTextFromValue( actual ) );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 drce->SetItems( pad, other );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pos, aLayer );
 testHoles = false; // No need for multiple violations
 }
 }
 
 if( testHoles && otherVia && otherVia->IsOnLayer( aLayer ) )
 {
 if( clearance > 0 && padShape->Collide( otherVia->GetEffectiveHoleShape().get(),
  std::max( 0, clearance - m_drcEpsilon ),
 &actual, &pos ) )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_HOLE_CLEARANCE );
 wxString msg;
 
 msg.Printf( _( "(%s clearance %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( clearance ),
 MessageTextFromValue( actual ) );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 drce->SetItems( pad, otherVia );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pos, aLayer );
 }
 }
 
 return !m_drcEngine->IsCancelled();
}
 
 
void DRC_TEST_PROVIDER_COPPER_CLEARANCE::testPadClearances( )
{
 const int progressDelta = 100;
 size_t count = 0;
 int ii = 0;
 
 for( FOOTPRINT* footprint : m_board->Footprints() )
 count += footprint->Pads().size();
 
 reportAux( wxT( "Testing %d pads..." ), count );
 
 std::unordered_map<PTR_PTR_CACHE_KEY, int> checkedPairs;
 
 for( FOOTPRINT* footprint : m_board->Footprints() )
 {
 for( PAD* pad : footprint->Pads() )
 {
 for( PCB_LAYER_ID layer : pad->GetLayerSet().Seq() )
 {
 std::shared_ptr<SHAPE> padShape = pad->GetEffectiveShape( layer );
 
 m_board->m_CopperItemRTreeCache->QueryColliding( pad, layer, layer,
 // Filter:
 [&]( BOARD_ITEM* other ) -> bool
 {
 BOARD_ITEM* a = pad;
 BOARD_ITEM* b = other;
 
 // store canonical order so we don't collide in both directions
 // (a:b and b:a)
 if( static_cast<void*>( a ) > static_cast<void*>( b ) )
 std::swap( a, b );
 
 if( checkedPairs.find( { a, b } ) != checkedPairs.end() )
 {
 return false;
 }
 else
 {
 checkedPairs[ { a, b } ] = 1;
 return true;
 }
 },
 // Visitor
 [&]( BOARD_ITEM* other ) -> bool
 {
 return testPadAgainstItem( pad, padShape.get(), layer, other );
 },
 m_board->m_DRCMaxClearance );
 
 for( ZONE* zone : m_board->m_DRCCopperZones )
 {
 testItemAgainstZone( pad, zone, layer );
 
 if( m_drcEngine->IsCancelled() )
 return;
 }
 }
 
 if( !reportProgress( ii++, count, progressDelta ) )
 return;
 }
 
 if( m_drcEngine->IsCancelled() )
 return;
 }
}
 
 
void DRC_TEST_PROVIDER_COPPER_CLEARANCE::testZonesToZones()
{
 const int progressDelta = 50;
 
 bool testClearance = !m_drcEngine->IsErrorLimitExceeded( DRCE_CLEARANCE );
 bool testIntersects = !m_drcEngine->IsErrorLimitExceeded( DRCE_ZONES_INTERSECT );
 
 SHAPE_POLY_SET buffer;
 SHAPE_POLY_SET* boardOutline = nullptr;
 DRC_CONSTRAINT constraint;
 int zone2zoneClearance;
 
 if( m_board->GetBoardPolygonOutlines( buffer ) )
 boardOutline = &buffer;
 
 for( int layer_id = F_Cu; layer_id <= B_Cu; ++layer_id )
 {
 PCB_LAYER_ID layer = static_cast<PCB_LAYER_ID>( layer_id );
 std::vector<SHAPE_POLY_SET> smoothed_polys;
 smoothed_polys.resize( m_board->m_DRCCopperZones.size() );
 
 // Skip over layers not used on the current board
 if( !m_board->IsLayerEnabled( layer ) )
 continue;
 
 for( size_t ii = 0; ii < m_board->m_DRCCopperZones.size(); ii++ )
 {
 if( m_board->m_DRCCopperZones[ii]->IsOnLayer( layer ) )
 {
 m_board->m_DRCCopperZones[ii]->BuildSmoothedPoly( smoothed_polys[ii], layer,
 boardOutline );
 }
 }
 
 // iterate through all areas
 for( size_t ia = 0; ia < m_board->m_DRCCopperZones.size(); ia++ )
 {
 if( !reportProgress( layer_id * m_board->m_DRCCopperZones.size() + ia,
 B_Cu * m_board->m_DRCCopperZones.size(), progressDelta ) )
 {
 return; // DRC cancelled
 }
 
 ZONE* zoneA = m_board->m_DRCCopperZones[ia];
 
 if( !zoneA->IsOnLayer( layer ) )
 continue;
 
 for( size_t ia2 = ia + 1; ia2 < m_board->m_DRCCopperZones.size(); ia2++ )
 {
 ZONE* zoneB = m_board->m_DRCCopperZones[ia2];
 
 // test for same layer
 if( !zoneB->IsOnLayer( layer ) )
 continue;
 
 // Test for same net
 if( zoneA->GetNetCode() == zoneB->GetNetCode() && zoneA->GetNetCode() >= 0 )
 continue;
 
 // test for different priorities
 if( zoneA->GetAssignedPriority() != zoneB->GetAssignedPriority() )
 continue;
 
 // rule areas may overlap at will
 if( zoneA->GetIsRuleArea() || zoneB->GetIsRuleArea() )
 continue;
 
 // Examine a candidate zone: compare zoneB to zoneA
 
 // Get clearance used in zone to zone test.
 constraint = m_drcEngine->EvalRules( CLEARANCE_CONSTRAINT, zoneA, zoneB, layer );
 zone2zoneClearance = constraint.GetValue().Min();
 
 if( constraint.GetSeverity() == RPT_SEVERITY_IGNORE )
 continue;
 
 if( testIntersects )
 {
 // test for some corners of zoneA inside zoneB
 for( auto it = smoothed_polys[ia].IterateWithHoles(); it; it++ )
 {
 VECTOR2I currentVertex = *it;
 wxPoint pt( currentVertex.x, currentVertex.y );
 
 if( smoothed_polys[ia2].Contains( currentVertex ) )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_ZONES_INTERSECT );
 drce->SetItems( zoneA, zoneB );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pt, layer );
 }
 }
 
 // test for some corners of zoneB inside zoneA
 for( auto it = smoothed_polys[ia2].IterateWithHoles(); it; it++ )
 {
 VECTOR2I currentVertex = *it;
 wxPoint pt( currentVertex.x, currentVertex.y );
 
 if( smoothed_polys[ia].Contains( currentVertex ) )
 {
 std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( DRCE_ZONES_INTERSECT );
 drce->SetItems( zoneB, zoneA );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, pt, layer );
 }
 }
 }
 
 // Iterate through all the segments of refSmoothedPoly
 std::map<VECTOR2I, int> conflictPoints;
 
 for( auto refIt = smoothed_polys[ia].IterateSegmentsWithHoles(); refIt; refIt++ )
 {
 // Build ref segment
 SEG refSegment = *refIt;
 
 // Iterate through all the segments in smoothed_polys[ia2]
 for( auto it = smoothed_polys[ia2].IterateSegmentsWithHoles(); it; it++ )
 {
 // Build test segment
 SEG testSegment = *it;
 VECTOR2I pt;
 
 int ax1, ay1, ax2, ay2;
 ax1 = refSegment.A.x;
 ay1 = refSegment.A.y;
 ax2 = refSegment.B.x;
 ay2 = refSegment.B.y;
 
 int bx1, by1, bx2, by2;
 bx1 = testSegment.A.x;
 by1 = testSegment.A.y;
 bx2 = testSegment.B.x;
 by2 = testSegment.B.y;
 
 int d = GetClearanceBetweenSegments( bx1, by1, bx2, by2, 0,
 ax1, ay1, ax2, ay2, 0,
 zone2zoneClearance, &pt.x, &pt.y );
 
 if( d < zone2zoneClearance )
 {
 if( conflictPoints.count( pt ) )
 conflictPoints[ pt ] = std::min( conflictPoints[ pt ], d );
 else
 conflictPoints[ pt ] = d;
 }
 }
 }
 
 for( const std::pair<const VECTOR2I, int>& conflict : conflictPoints )
 {
 int actual = conflict.second;
 std::shared_ptr<DRC_ITEM> drce;
 
 if( actual <= 0 && testIntersects )
 {
 drce = DRC_ITEM::Create( DRCE_ZONES_INTERSECT );
 }
 else if( testClearance )
 {
 drce = DRC_ITEM::Create( DRCE_CLEARANCE );
 wxString msg;
 
 msg.Printf( _( "(%s clearance %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( zone2zoneClearance ),
 MessageTextFromValue( std::max( actual, 0 ) ) );
 
 drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + msg );
 }
 
  if( drce )
 {
 drce->SetItems( zoneA, zoneB );
 drce->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drce, conflict.first, layer );
 }
 }
 
 if( m_drcEngine->IsCancelled() )
 return;
 }
 }
 }
}
 
 
namespace detail
{
 static DRC_REGISTER_TEST_PROVIDER<DRC_TEST_PROVIDER_COPPER_CLEARANCE> dummy;
}