402 lines
13 KiB
C++
402 lines
13 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2021 Jean-Pierre Charras, jp.charras at wanadoo.fr
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* Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <confirm.h>
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#include <board_design_settings.h>
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#include <pcb_track.h>
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#include <pad.h>
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#include <zone_filler.h>
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#include <board_commit.h>
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#include "teardrop.h"
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#include <geometry/convex_hull.h>
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#include <geometry/shape_line_chain.h>
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#include <convert_basic_shapes_to_polygon.h>
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#include <bezier_curves.h>
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#include <wx/log.h>
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// The first priority level of a teardrop area (arbitrary value)
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#define MAGIC_TEARDROP_ZONE_ID 30000
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void TEARDROP_MANAGER::SetTargets( bool aApplyToPadVias, bool aApplyToRoundShapesOnly,
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bool aApplyToSurfacePads, bool aApplyToTracks )
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{
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m_applyToViaPads = aApplyToPadVias;
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m_applyToRoundShapesOnly = aApplyToRoundShapesOnly;
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m_applyToSurfacePads = aApplyToSurfacePads;
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m_applyToTracks = aApplyToTracks;
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}
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// Build a zone teardrop
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ZONE* TEARDROP_MANAGER::createTeardrop( TEARDROP_VARIANT aTeardropVariant,
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std::vector<VECTOR2I>& aPoints, PCB_TRACK* aTrack) const
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{
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ZONE* teardrop = new ZONE( m_board );
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// Add zone properties (priority will be fixed later)
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teardrop->SetTeardropAreaType( aTeardropVariant == TD_TYPE_PADVIA ?
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TEARDROP_TYPE::TD_VIAPAD :
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TEARDROP_TYPE::TD_TRACKEND );
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teardrop->SetLayer( aTrack->GetLayer() );
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teardrop->SetNetCode( aTrack->GetNetCode() );
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teardrop->SetLocalClearance( 0 );
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teardrop->SetMinThickness( Millimeter2iu( 0.0254 ) ); // The minimum zone thickness
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teardrop->SetPadConnection( ZONE_CONNECTION::FULL );
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teardrop->SetIsFilled( false );
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teardrop->SetZoneName( aTeardropVariant == TD_TYPE_PADVIA ?
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MAGIC_TEARDROP_PADVIA_NAME :
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MAGIC_TEARDROP_TRACK_NAME );
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teardrop->SetIslandRemovalMode( ISLAND_REMOVAL_MODE::NEVER );
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SHAPE_POLY_SET* outline = teardrop->Outline();
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outline->NewOutline();
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for( VECTOR2I pt: aPoints )
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outline->Append(pt.x, pt.y);
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// Can be usefull:
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teardrop->CalculateFilledArea();
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return teardrop;
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}
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int TEARDROP_MANAGER::SetTeardrops( BOARD_COMMIT* aCommitter,
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bool aDiscardInSameZone, bool aFollowTracks )
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{
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// Init parameters:
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m_tolerance = Millimeter2iu( 0.01 );
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int count = 0; // Number of created teardrop
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// Old teardrops must be removed, to ensure a clean teardrop rebuild
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int removed_cnt = RemoveTeardrops( aCommitter, false );
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// get vias, PAD_ATTRIB_PTH and others if aIncludeNotDrilled == true
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// (custom pads are not collected)
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std::vector< VIAPAD > viapad_list;
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if( m_applyToViaPads )
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collectVias( viapad_list );
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collectPadsCandidate( viapad_list, m_applyToViaPads, m_applyToRoundShapesOnly, m_applyToSurfacePads );
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TRACK_BUFFER trackLookupList;
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if( aFollowTracks )
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{
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// Build the track list (only straight lines)
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for( PCB_TRACK* track: m_board->Tracks() )
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{
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if( track->Type() == PCB_TRACE_T )
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{
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int netcode = track->GetNetCode();
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int layer = track->GetLayer();
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trackLookupList.AddTrack( track, layer, netcode );
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}
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}
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}
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std::vector< ZONE*> teardrops;
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collectTeardrops( teardrops );
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for( PCB_TRACK* track : m_board->Tracks() )
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{
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if( track->Type() != PCB_TRACE_T )
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continue;
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// Search for a padvia connected to track, with one end inside and one end outside
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// if both track ends are inside or outside, one cannot build a teadrop
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for( VIAPAD& viapad: viapad_list )
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{
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// Pad and track must be on the same layer
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if( !viapad.IsOnLayer( track->GetLayer() ) )
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continue;
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bool start_in_pad = viapad.m_Parent->HitTest( track->GetStart() );
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bool end_in_pad = viapad.m_Parent->HitTest( track->GetEnd() );
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if( end_in_pad == start_in_pad )
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// the track is inside or outside the via pad. Cannot create a teardrop
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continue;
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// A pointer to one of available m_Parameters items
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TEARDROP_PARAMETERS* currParams;
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if( viapad.m_IsRound )
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currParams = m_Parameters.GetParameters( TARGET_ROUND );
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else
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currParams = m_Parameters.GetParameters( TARGET_RECT );
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// Ensure a teardrop shape can be built:
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// The track width must be < teardrop height
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if( track->GetWidth() >= currParams->m_tdMaxHeight
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|| track->GetWidth() >= viapad.m_Width * currParams->m_heightRatio )
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continue;
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// Skip case where pad/via and the track is within a copper zone with the same net
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// (and the pad can be connected by the zone thermal relief )
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if( aDiscardInSameZone && isViaAndTrackInSameZone( viapad, track ) )
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continue;
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std::vector<VECTOR2I> points;
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bool success = computeTeardropPolygonPoints( currParams, points, track, viapad,
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aFollowTracks, trackLookupList );
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if( success )
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{
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ZONE* new_teardrop = createTeardrop( TD_TYPE_PADVIA, points, track );
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m_board->Add( new_teardrop, ADD_MODE::BULK_INSERT );
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m_createdTdList.push_back( new_teardrop );
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if( aCommitter )
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aCommitter->Added( new_teardrop );
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count += 1;
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}
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}
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}
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int track2trackCount = 0;
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if( m_applyToTracks )
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track2trackCount = addTeardropsOnTracks( aCommitter );
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// Now set priority of teardrops now all teardrops are added
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setTeardropPriorities();
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if( count || removed_cnt || track2trackCount )
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{
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ZONE_FILLER filler( m_board, aCommitter );
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filler.Fill( m_board->Zones() );
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if( aCommitter )
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aCommitter->Push( _( "Add teardrops" ) );
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}
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return count + track2trackCount;
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}
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void TEARDROP_MANAGER::setTeardropPriorities()
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{
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int priority_base = MAGIC_TEARDROP_ZONE_ID;
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// The sort function to sort by increasing copper layers. Group by layers.
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// For same layers sort by decreasing areas
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struct
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{
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bool operator()(ZONE* a, ZONE* b) const
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{
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if( a->GetLayer() == b->GetLayer() )
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return a->GetOutlineArea() > b->GetOutlineArea();
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return a->GetLayer() < b->GetLayer();
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}
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} compareLess;
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for( ZONE* td: m_createdTdList )
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td->CalculateOutlineArea();
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std::sort( m_createdTdList.begin(), m_createdTdList.end(), compareLess );
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int curr_layer = -1;
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for( ZONE* td: m_createdTdList )
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{
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if( td->GetLayer() != curr_layer )
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{
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curr_layer = td->GetLayer();
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priority_base = MAGIC_TEARDROP_ZONE_ID;
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}
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td->SetPriority( priority_base++ );
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}
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}
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int TEARDROP_MANAGER::addTeardropsOnTracks( BOARD_COMMIT* aCommitter )
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{
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TRACK_BUFFER trackLookupList;
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int count = 0;
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// Build the track list (only straight lines)
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for( PCB_TRACK* track: m_board->Tracks() )
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{
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if( track->Type() == PCB_TRACE_T )
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{
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int netcode = track->GetNetCode();
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int layer = track->GetLayer();
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trackLookupList.AddTrack( track, layer, netcode );
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}
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}
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// get vias and pads (custom pads are not collected). We do not create a track to track
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// teardrop inside a pad or via area
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std::vector< VIAPAD > viapad_list;
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collectVias( viapad_list );
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collectPadsCandidate( viapad_list, true, true, true );
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TEARDROP_PARAMETERS* currParams = m_Parameters.GetParameters( TARGET_TRACK );
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// Explore groups (a group is a set of tracks on the same layer and the same net):
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for( auto grp : trackLookupList.GetBuffer() )
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{
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int layer, netcode;
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TRACK_BUFFER::GetNetcodeAndLayerFromIndex( grp.first, &layer, &netcode );
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std::vector<PCB_TRACK*>* sublist = grp.second;
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if( sublist->size() <= 1 ) // We need at least 2 track segments
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continue;
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// The sort function to sort by increasing track widths
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struct
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{
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bool operator()(PCB_TRACK* a, PCB_TRACK* b) const
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{ return a->GetWidth() < b->GetWidth(); }
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} compareLess;
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std::sort( sublist->begin(), sublist->end(), compareLess );
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int min_width = sublist->front()->GetWidth();
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int max_width = sublist->back()->GetWidth();
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// Skip groups having the same track thickness
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if( max_width == min_width )
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continue;
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for( unsigned ii = 0; ii < sublist->size()-1; ii++ )
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{
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PCB_TRACK* track = (*sublist)[ii];
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int track_len = track->GetLength();
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min_width = track->GetWidth();
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// to avoid creating a teardrop between 2 tracks having similar widths
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// give a threshold
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const double th = 1.2;
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min_width = min_width * th;
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for( unsigned jj = ii+1; jj < sublist->size(); jj++ )
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{
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// Seach candidates with thickness > curr thickness
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PCB_TRACK* candidate = (*sublist)[jj];
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if( min_width >= candidate->GetWidth() )
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continue;
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// Cannot build a teardrop on a too short track segment.
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// The min len is > candidate radius
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if( track_len <= candidate->GetWidth() /2 )
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continue;
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// Now test end to end connection:
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EDA_ITEM_FLAGS match_points; // to return the end point EDA_ITEM_FLAGS:
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// 0, STARTPOINT, ENDPOINT
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VECTOR2I roundshape_pos = candidate->GetStart();
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ENDPOINT_T endPointCandidate = ENDPOINT_START;
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match_points = track->IsPointOnEnds( roundshape_pos, m_tolerance );
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if( !match_points )
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{
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roundshape_pos = candidate->GetEnd();
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match_points = track->IsPointOnEnds( roundshape_pos, m_tolerance );
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endPointCandidate = ENDPOINT_END;
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}
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// Ensure a pad or via is not on test_pos point before creating a teardrop
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// at this location
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for( VIAPAD& viapad : viapad_list )
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{
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if( viapad.IsOnLayer( track->GetLayer() )
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&& viapad.m_Parent->HitTest( roundshape_pos, 0 ) )
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{
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match_points = 0;
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break;
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}
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}
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if( match_points )
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{
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VIAPAD viatrack( candidate, endPointCandidate );
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std::vector<VECTOR2I> points;
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bool success = computeTeardropPolygonPoints( currParams,
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points, track, viatrack,
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false, trackLookupList );
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if( success )
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{
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ZONE* new_teardrop = createTeardrop( TD_TYPE_TRACKEND, points, track );
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m_board->Add( new_teardrop, ADD_MODE::BULK_INSERT );
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m_createdTdList.push_back( new_teardrop );
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if( aCommitter )
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aCommitter->Added( new_teardrop );
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count += 1;
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}
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}
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}
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}
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}
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return count;
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}
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int TEARDROP_MANAGER::RemoveTeardrops( BOARD_COMMIT* aCommitter, bool aCommitAfterRemove )
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{
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int count = 0;
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std::vector< ZONE*> teardrops;
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collectTeardrops( teardrops );
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for( ZONE* teardrop : teardrops )
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{
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m_board->Remove( teardrop, REMOVE_MODE::BULK );
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if( aCommitter )
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aCommitter->Removed( teardrop );
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count += 1;
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}
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if( count )
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{
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ZONE_FILLER filler( m_board, aCommitter );
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filler.Fill( m_board->Zones() );
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if( aCommitter && aCommitAfterRemove )
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aCommitter->Push( _( "Remove teardrops" ) );
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}
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return count;
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}
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