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convert_shape_list_to_polygon.cpp
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convert_shape_list_to_polygon.cpp
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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2017 Jean-Pierre Charras, jp.charras at wanadoo.fr
* Copyright (C) 2015 SoftPLC Corporation, Dick Hollenbeck <[email protected]>
* Copyright (C) 1992-2023 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 <unordered_set>
#include <trigo.h>
#include <macros.h>
#include <math/vector2d.h>
#include <pcb_shape.h>
#include <footprint.h>
#include <pad.h>
#include <base_units.h>
#include <convert_basic_shapes_to_polygon.h>
#include <geometry/shape_poly_set.h>
#include <geometry/geometry_utils.h>
#include <convert_shape_list_to_polygon.h>
#include <board.h>
#include <collectors.h>
#include <wx/log.h>
/**
* Flag to enable debug tracing for the board outline creation
*
* Use "KICAD_BOARD_OUTLINE" to enable.
*
* @ingroup trace_env_vars
*/
const wxChar* traceBoardOutline = wxT( "KICAD_BOARD_OUTLINE" );
class SCOPED_FLAGS_CLEANER : public std::unordered_set<EDA_ITEM*>
{
EDA_ITEM_FLAGS m_flagsToClear;
public:
SCOPED_FLAGS_CLEANER( const EDA_ITEM_FLAGS& aFlagsToClear ) : m_flagsToClear( aFlagsToClear ) {}
~SCOPED_FLAGS_CLEANER()
{
for( EDA_ITEM* item : *this )
item->ClearFlags( m_flagsToClear );
}
};
/**
* Local and tunable method of qualifying the proximity of two points.
*
* @param aLeft is the first point.
* @param aRight is the second point.
* @param aLimit is a measure of proximity that the caller knows about.
* @return true if the two points are close enough, else false.
*/
static bool close_enough( VECTOR2I aLeft, VECTOR2I aRight, unsigned aLimit )
{
return ( aLeft - aRight ).SquaredEuclideanNorm() <= SEG::Square( aLimit );
}
/**
* Local method which qualifies whether the start or end point of a segment is closest to a point.
*
* @param aRef is the reference point
* @param aFirst is the first point
* @param aSecond is the second point
* @return true if the first point is closest to the reference, otherwise false.
*/
static bool closer_to_first( VECTOR2I aRef, VECTOR2I aFirst, VECTOR2I aSecond )
{
return ( aRef - aFirst ).SquaredEuclideanNorm() < ( aRef - aSecond ).SquaredEuclideanNorm();
}
/**
* Search for a #PCB_SHAPE matching a given end point or start point in a list.
*
* @param aShape The starting shape.
* @param aPoint The starting or ending point to search for.
* @param aList The list to remove from.
* @param aLimit is the distance from \a aPoint that still constitutes a valid find.
* @return The first #PCB_SHAPE that has a start or end point matching aPoint, otherwise nullptr.
*/
static PCB_SHAPE* findNext( PCB_SHAPE* aShape, const VECTOR2I& aPoint,
const std::vector<PCB_SHAPE*>& aList, unsigned aLimit )
{
// Look for an unused, exact hit
for( PCB_SHAPE* graphic : aList )
{
if( graphic == aShape || ( graphic->GetFlags() & SKIP_STRUCT ) != 0 )
continue;
if( aPoint == graphic->GetStart() || aPoint == graphic->GetEnd() )
return graphic;
}
// Search again for anything that's close, even something already used. (The latter is
// important for error reporting.)
VECTOR2I pt( aPoint );
SEG::ecoord closest_dist_sq = SEG::Square( aLimit );
PCB_SHAPE* closest_graphic = nullptr;
SEG::ecoord d_sq;
for( PCB_SHAPE* graphic : aList )
{
if( graphic == aShape )
continue;
d_sq = ( pt - graphic->GetStart() ).SquaredEuclideanNorm();
if( d_sq < closest_dist_sq )
{
closest_dist_sq = d_sq;
closest_graphic = graphic;
}
d_sq = ( pt - graphic->GetEnd() ).SquaredEuclideanNorm();
if( d_sq < closest_dist_sq )
{
closest_dist_sq = d_sq;
closest_graphic = graphic;
}
}
return closest_graphic; // Note: will be nullptr if nothing within aLimit
}
static bool isCopperOutside( const FOOTPRINT* aFootprint, SHAPE_POLY_SET& aShape )
{
bool padOutside = false;
for( PAD* pad : aFootprint->Pads() )
{
pad->Padstack().ForEachUniqueLayer(
[&]( PCB_LAYER_ID aLayer )
{
SHAPE_POLY_SET poly = aShape.CloneDropTriangulation();
poly.ClearArcs();
poly.BooleanIntersection( *pad->GetEffectivePolygon( aLayer, ERROR_INSIDE ),
SHAPE_POLY_SET::PM_FAST );
if( poly.OutlineCount() == 0 )
{
VECTOR2I padPos = pad->GetPosition();
wxLogTrace( traceBoardOutline, wxT( "Tested pad (%d, %d): outside" ),
padPos.x, padPos.y );
padOutside = true;
}
} );
if( padOutside )
break;
VECTOR2I padPos = pad->GetPosition();
wxLogTrace( traceBoardOutline, wxT( "Tested pad (%d, %d): not outside" ),
padPos.x, padPos.y );
}
return padOutside;
}
bool doConvertOutlineToPolygon( std::vector<PCB_SHAPE*>& aShapeList, SHAPE_POLY_SET& aPolygons,
int aErrorMax, int aChainingEpsilon, bool aAllowDisjoint,
OUTLINE_ERROR_HANDLER* aErrorHandler, bool aAllowUseArcsInPolygons,
SCOPED_FLAGS_CLEANER& aCleaner )
{
if( aShapeList.size() == 0 )
return true;
bool selfIntersecting = false;
wxString msg;
PCB_SHAPE* graphic = nullptr;
std::set<PCB_SHAPE*> startCandidates( aShapeList.begin(), aShapeList.end() );
// Keep a list of where the various shapes came from so after doing our combined-polygon
// tests we can still report errors against the individual graphic items.
std::map<std::pair<VECTOR2I, VECTOR2I>, PCB_SHAPE*> shapeOwners;
auto fetchOwner =
[&]( const SEG& seg ) -> PCB_SHAPE*
{
auto it = shapeOwners.find( std::make_pair( seg.A, seg.B ) );
return it == shapeOwners.end() ? nullptr : it->second;
};
PCB_SHAPE* prevGraphic = nullptr;
VECTOR2I prevPt;
std::vector<SHAPE_LINE_CHAIN> contours;
for( PCB_SHAPE* shape : startCandidates )
shape->ClearFlags( SKIP_STRUCT );
while( startCandidates.size() )
{
graphic = (PCB_SHAPE*) *startCandidates.begin();
graphic->SetFlags( SKIP_STRUCT );
aCleaner.insert( graphic );
startCandidates.erase( startCandidates.begin() );
contours.emplace_back();
SHAPE_LINE_CHAIN& currContour = contours.back();
currContour.SetWidth( graphic->GetWidth() );
bool firstPt = true;
// Circles, rects and polygons are closed shapes unto themselves (and do not combine
// with other shapes), so process them separately.
if( graphic->GetShape() == SHAPE_T::POLY )
{
for( auto it = graphic->GetPolyShape().CIterate(); it; it++ )
{
VECTOR2I pt = *it;
currContour.Append( pt );
if( firstPt )
firstPt = false;
else
shapeOwners[ std::make_pair( prevPt, pt ) ] = graphic;
prevPt = pt;
}
currContour.SetClosed( true );
}
else if( graphic->GetShape() == SHAPE_T::CIRCLE )
{
VECTOR2I center = graphic->GetCenter();
int radius = graphic->GetRadius();
VECTOR2I start = center;
start.x += radius;
// Add 360 deg Arc in currContour
SHAPE_ARC arc360( center, start, ANGLE_360, 0 );
currContour.Append( arc360, aErrorMax );
currContour.SetClosed( true );
// set shapeOwners for currContour points created by appending the arc360:
for( int ii = 1; ii < currContour.PointCount(); ++ii )
{
shapeOwners[ std::make_pair( currContour.CPoint( ii-1 ),
currContour.CPoint( ii ) ) ] = graphic;
}
if( !aAllowUseArcsInPolygons )
currContour.ClearArcs();
}
else if( graphic->GetShape() == SHAPE_T::RECTANGLE )
{
std::vector<VECTOR2I> pts = graphic->GetRectCorners();
for( const VECTOR2I& pt : pts )
{
currContour.Append( pt );
if( firstPt )
firstPt = false;
else
shapeOwners[ std::make_pair( prevPt, pt ) ] = graphic;
prevPt = pt;
}
currContour.SetClosed( true );
}
else
{
// Polygon start point. Arbitrarily chosen end of the segment and build the poly
// from here.
VECTOR2I startPt = graphic->GetEnd();
prevPt = startPt;
currContour.Append( prevPt );
// do not append the other end point yet, this first 'graphic' might be an arc
for(;;)
{
switch( graphic->GetShape() )
{
case SHAPE_T::RECTANGLE:
case SHAPE_T::CIRCLE:
{
// As a non-first item, closed shapes can't be anything but self-intersecting
if( aErrorHandler )
{
wxASSERT( prevGraphic );
(*aErrorHandler)( _( "(self-intersecting)" ), prevGraphic, graphic,
prevPt );
}
selfIntersecting = true;
// A closed shape will finish where it started, so no point in updating prevPt
break;
}
case SHAPE_T::SEGMENT:
{
VECTOR2I nextPt;
// Use the line segment end point furthest away from prevPt as we assume
// the other end to be ON prevPt or very close to it.
if( closer_to_first( prevPt, graphic->GetStart(), graphic->GetEnd()) )
nextPt = graphic->GetEnd();
else
nextPt = graphic->GetStart();
currContour.Append( nextPt );
shapeOwners[ std::make_pair( prevPt, nextPt ) ] = graphic;
prevPt = nextPt;
}
break;
case SHAPE_T::ARC:
{
VECTOR2I pstart = graphic->GetStart();
VECTOR2I pmid = graphic->GetArcMid();
VECTOR2I pend = graphic->GetEnd();
if( !close_enough( prevPt, pstart, aChainingEpsilon ) )
{
wxASSERT( close_enough( prevPt, graphic->GetEnd(), aChainingEpsilon ) );
std::swap( pstart, pend );
}
SHAPE_ARC sarc( pstart, pmid, pend, 0 );
SHAPE_LINE_CHAIN arcChain;
arcChain.Append( sarc, aErrorMax );
// if this arc is after another object, pop off the first point
// the previous point from the last object should be already close enough as part of chaining
if( prevGraphic != nullptr )
arcChain.Remove( 0 );
if( !aAllowUseArcsInPolygons )
arcChain.ClearArcs();
// set shapeOwners for arcChain points created by appending the sarc:
for( int ii = 1; ii < arcChain.PointCount(); ++ii )
{
shapeOwners[std::make_pair( arcChain.CPoint( ii - 1 ),
arcChain.CPoint( ii ) )] = graphic;
}
currContour.Append( arcChain );
prevPt = pend;
}
break;
case SHAPE_T::BEZIER:
{
// We do not support Bezier curves in polygons, so approximate with a series
// of short lines and put those line segments into the !same! PATH.
VECTOR2I nextPt;
bool reverse = false;
// Use the end point furthest away from prevPt as we assume the other
// end to be ON prevPt or very close to it.
if( closer_to_first( prevPt, graphic->GetStart(), graphic->GetEnd()) )
{
nextPt = graphic->GetEnd();
}
else
{
nextPt = graphic->GetStart();
reverse = true;
}
// Ensure the approximated Bezier shape is built
graphic->RebuildBezierToSegmentsPointsList( ARC_HIGH_DEF );
if( reverse )
{
for( int jj = graphic->GetBezierPoints().size()-1; jj >= 0; jj-- )
{
const VECTOR2I& pt = graphic->GetBezierPoints()[jj];
if( prevPt == pt )
continue;
currContour.Append( pt );
shapeOwners[ std::make_pair( prevPt, pt ) ] = graphic;
prevPt = pt;
}
}
else
{
for( const VECTOR2I& pt : graphic->GetBezierPoints() )
{
if( prevPt == pt )
continue;
currContour.Append( pt );
shapeOwners[ std::make_pair( prevPt, pt ) ] = graphic;
prevPt = pt;
}
}
prevPt = nextPt;
}
break;
default:
UNIMPLEMENTED_FOR( graphic->SHAPE_T_asString() );
return false;
}
// Get next closest segment.
PCB_SHAPE* nextGraphic = findNext( graphic, prevPt, aShapeList, aChainingEpsilon );
if( nextGraphic && !( nextGraphic->GetFlags() & SKIP_STRUCT ) )
{
prevGraphic = graphic;
graphic = nextGraphic;
graphic->SetFlags( SKIP_STRUCT );
aCleaner.insert( graphic );
startCandidates.erase( graphic );
continue;
}
// Finished, or ran into trouble...
if( close_enough( startPt, prevPt, aChainingEpsilon ) )
{
currContour.SetClosed( true );
break;
}
else if( nextGraphic ) // encountered already-used segment, but not at the start
{
if( aErrorHandler )
(*aErrorHandler)( _( "(self-intersecting)" ), graphic, nextGraphic,
prevPt );
break;
}
else // encountered discontinuity
{
if( aErrorHandler )
(*aErrorHandler)( _( "(not a closed shape)" ), graphic, nullptr, prevPt );
break;
}
}
}
}
for( const SHAPE_LINE_CHAIN& contour : contours )
{
if( !contour.IsClosed() )
return false;
}
// First, collect the parents of each contour
std::map<int, std::vector<int>> contourToParentIndexesMap;
for( size_t ii = 0; ii < contours.size(); ++ii )
{
VECTOR2I firstPt = contours[ii].GetPoint( 0 );
std::vector<int> parents;
for( size_t jj = 0; jj < contours.size(); ++jj )
{
if( jj == ii )
continue;
const SHAPE_LINE_CHAIN& parentCandidate = contours[jj];
if( parentCandidate.PointInside( firstPt ) )
parents.push_back( jj );
}
contourToParentIndexesMap[ii] = std::move( parents );
}
// Next add those that are top-level outlines to the SHAPE_POLY_SET
std::map<int, int> contourToOutlineIdxMap;
for( const auto& [ contourIndex, parentIndexes ] : contourToParentIndexesMap )
{
if( parentIndexes.size() %2 == 0 )
{
// Even number of parents; top-level outline
if( !aAllowDisjoint && !aPolygons.IsEmpty() )
{
if( aErrorHandler )
{
BOARD_ITEM* a = fetchOwner( aPolygons.Outline( 0 ).GetSegment( 0 ) );
BOARD_ITEM* b = fetchOwner( contours[ contourIndex ].GetSegment( 0 ) );
if( a && b )
{
(*aErrorHandler)( _( "(multiple board outlines not supported)" ), a, b,
contours[ contourIndex ].GetPoint( 0 ) );
return false;
}
}
}
aPolygons.AddOutline( contours[ contourIndex ] );
contourToOutlineIdxMap[ contourIndex ] = aPolygons.OutlineCount() - 1;
}
}
// And finally add the holes
for( const auto& [ contourIndex, parentIndexes ] : contourToParentIndexesMap )
{
if( parentIndexes.size() %2 == 1 )
{
// Odd number of parents; we're a hole in the parent which has one fewer parents
// than we have.
const SHAPE_LINE_CHAIN& hole = contours[ contourIndex ];
for( int parentContourIdx : parentIndexes )
{
if( contourToParentIndexesMap[ parentContourIdx ].size() == parentIndexes.size() - 1 )
{
int outlineIdx = contourToOutlineIdxMap[ parentContourIdx ];
aPolygons.AddHole( hole, outlineIdx );
break;
}
}
}
}
// All of the silliness that follows is to work around the segment iterator while checking
// for collisions.
// TODO: Implement proper segment and point iterators that follow std
for( auto seg1 = aPolygons.IterateSegmentsWithHoles(); seg1; seg1++ )
{
auto seg2 = seg1;
for( ++seg2; seg2; seg2++ )
{
// Check for exact overlapping segments.
if( *seg1 == *seg2 || ( ( *seg1 ).A == ( *seg2 ).B && ( *seg1 ).B == ( *seg2 ).A ) )
{
if( aErrorHandler )
{
BOARD_ITEM* a = fetchOwner( *seg1 );
BOARD_ITEM* b = fetchOwner( *seg2 );
(*aErrorHandler)( _( "(self-intersecting)" ), a, b, ( *seg1 ).A );
}
selfIntersecting = true;
}
if( OPT_VECTOR2I pt = seg1.Get().Intersect( seg2.Get(), true ) )
{
if( aErrorHandler )
{
BOARD_ITEM* a = fetchOwner( *seg1 );
BOARD_ITEM* b = fetchOwner( *seg2 );
(*aErrorHandler)( _( "(self-intersecting)" ), a, b, *pt );
}
selfIntersecting = true;
}
}
}
return !selfIntersecting;
}
bool ConvertOutlineToPolygon( std::vector<PCB_SHAPE*>& aShapeList, SHAPE_POLY_SET& aPolygons,
int aErrorMax, int aChainingEpsilon, bool aAllowDisjoint,
OUTLINE_ERROR_HANDLER* aErrorHandler, bool aAllowUseArcsInPolygons )
{
SCOPED_FLAGS_CLEANER cleaner( SKIP_STRUCT );
return doConvertOutlineToPolygon( aShapeList, aPolygons, aErrorMax, aChainingEpsilon,
aAllowDisjoint, aErrorHandler, aAllowUseArcsInPolygons,
cleaner );
}
bool TestBoardOutlinesGraphicItems( BOARD* aBoard, int aMinDist,
OUTLINE_ERROR_HANDLER* aErrorHandler )
{
bool success = true;
PCB_TYPE_COLLECTOR items;
int min_dist = std::max( 0, aMinDist );
// Get all the shapes into 'items', then keep only those on layer == Edge_Cuts.
items.Collect( aBoard, { PCB_SHAPE_T } );
std::vector<PCB_SHAPE*> shapeList;
for( int ii = 0; ii < items.GetCount(); ii++ )
{
PCB_SHAPE* seg = static_cast<PCB_SHAPE*>( items[ii] );
if( seg->GetLayer() == Edge_Cuts )
shapeList.push_back( seg );
}
// Now Test validity of collected items
for( PCB_SHAPE* shape : shapeList )
{
switch( shape->GetShape() )
{
case SHAPE_T::RECTANGLE:
{
VECTOR2I seg = shape->GetEnd() - shape->GetStart();
int dim = seg.EuclideanNorm();
if( dim <= min_dist )
{
success = false;
if( aErrorHandler )
{
(*aErrorHandler)( wxString::Format( _( "(rectangle has null or very small "
"size: %d nm)" ), dim ),
shape, nullptr, shape->GetStart() );
}
}
break;
}
case SHAPE_T::CIRCLE:
{
int r = shape->GetRadius();
if( r <= min_dist )
{
success = false;
if( aErrorHandler )
{
(*aErrorHandler)( wxString::Format( _( "(circle has null or very small "
"radius: %d nm)" ), r ),
shape, nullptr, shape->GetStart() );
}
}
break;
}
case SHAPE_T::SEGMENT:
{
VECTOR2I seg = shape->GetEnd() - shape->GetStart();
int dim = seg.EuclideanNorm();
if( dim <= min_dist )
{
success = false;
if( aErrorHandler )
{
(*aErrorHandler)( wxString::Format( _( "(segment has null or very small "
"length: %d nm)" ), dim ),
shape, nullptr, shape->GetStart() );
}
}
break;
}
case SHAPE_T::ARC:
{
// Arc size can be evaluated from the distance between arc middle point and arc ends
// We do not need a precise value, just an idea of its size
VECTOR2I arcMiddle = shape->GetArcMid();
VECTOR2I seg1 = arcMiddle - shape->GetStart();
VECTOR2I seg2 = shape->GetEnd() - arcMiddle;
int dim = seg1.EuclideanNorm() + seg2.EuclideanNorm();
if( dim <= min_dist )
{
success = false;
if( aErrorHandler )
{
(*aErrorHandler)( wxString::Format( _( "(arc has null or very small size: "
"%d nm)" ), dim ),
shape, nullptr, shape->GetStart() );
}
}
break;
}
case SHAPE_T::POLY:
break;
case SHAPE_T::BEZIER:
break;
default:
UNIMPLEMENTED_FOR( shape->SHAPE_T_asString() );
return false;
}
}
return success;
}
bool BuildBoardPolygonOutlines( BOARD* aBoard, SHAPE_POLY_SET& aOutlines, int aErrorMax,
int aChainingEpsilon, OUTLINE_ERROR_HANDLER* aErrorHandler,
bool aAllowUseArcsInPolygons )
{
PCB_TYPE_COLLECTOR items;
SHAPE_POLY_SET fpHoles;
bool success = false;
SCOPED_FLAGS_CLEANER cleaner( SKIP_STRUCT );
// Get all the shapes into 'items', then keep only those on layer == Edge_Cuts.
items.Collect( aBoard, { PCB_SHAPE_T } );
for( int ii = 0; ii < items.GetCount(); ++ii )
items[ii]->ClearFlags( SKIP_STRUCT );
for( FOOTPRINT* fp : aBoard->Footprints() )
{
PCB_TYPE_COLLECTOR fpItems;
fpItems.Collect( fp, { PCB_SHAPE_T } );
std::vector<PCB_SHAPE*> fpSegList;
for( int ii = 0; ii < fpItems.GetCount(); ii++ )
{
PCB_SHAPE* fpSeg = static_cast<PCB_SHAPE*>( fpItems[ii] );
if( fpSeg->GetLayer() == Edge_Cuts )
fpSegList.push_back( fpSeg );
}
if( !fpSegList.empty() )
{
SHAPE_POLY_SET fpOutlines;
success = doConvertOutlineToPolygon( fpSegList, fpOutlines, aErrorMax, aChainingEpsilon,
false,
// don't report errors here; the second pass also
// gets an opportunity to use these segments
nullptr, aAllowUseArcsInPolygons, cleaner );
// Test to see if we should make holes or outlines. Holes are made if the footprint
// has copper outside of a single, closed outline. If there are multiple outlines,
// we assume that the footprint edges represent holes as we do not support multiple
// boards. Similarly, if any of the footprint pads are located outside of the edges,
// then the edges are holes
if( success && ( isCopperOutside( fp, fpOutlines ) || fpOutlines.OutlineCount() > 1 ) )
{
fpHoles.Append( fpOutlines );
}
else
{
// If it wasn't a closed area, or wasn't a hole, the we want to keep the fpSegs
// in contention for the board outline builds.
for( int ii = 0; ii < fpItems.GetCount(); ++ii )
fpItems[ii]->ClearFlags( SKIP_STRUCT );
}
}
}
// Make a working copy of aSegList, because the list is modified during calculations
std::vector<PCB_SHAPE*> segList;
for( int ii = 0; ii < items.GetCount(); ii++ )
{
PCB_SHAPE* seg = static_cast<PCB_SHAPE*>( items[ii] );
// Skip anything already used to generate footprint holes (above)
if( seg->GetFlags() & SKIP_STRUCT )
continue;
if( seg->GetLayer() == Edge_Cuts )
segList.push_back( seg );
}
if( segList.size() )
{
success = doConvertOutlineToPolygon( segList, aOutlines, aErrorMax, aChainingEpsilon, true,
aErrorHandler, aAllowUseArcsInPolygons, cleaner );
}
if( !success || !aOutlines.OutlineCount() )
{
// Couldn't create a valid polygon outline. Use the board edge cuts bounding box to
// create a rectangular outline, or, failing that, the bounding box of the items on
// the board.
BOX2I bbbox = aBoard->GetBoardEdgesBoundingBox();
// If null area, uses the global bounding box.
if( ( bbbox.GetWidth() ) == 0 || ( bbbox.GetHeight() == 0 ) )
bbbox = aBoard->ComputeBoundingBox( false );
// Ensure non null area. If happen, gives a minimal size.
if( ( bbbox.GetWidth() ) == 0 || ( bbbox.GetHeight() == 0 ) )
bbbox.Inflate( pcbIUScale.mmToIU( 1.0 ) );
aOutlines.RemoveAllContours();
aOutlines.NewOutline();
VECTOR2I corner;
aOutlines.Append( bbbox.GetOrigin() );
corner.x = bbbox.GetOrigin().x;
corner.y = bbbox.GetEnd().y;
aOutlines.Append( corner );
aOutlines.Append( bbbox.GetEnd() );
corner.x = bbbox.GetEnd().x;
corner.y = bbbox.GetOrigin().y;
aOutlines.Append( corner );
}
for( int ii = 0; ii < fpHoles.OutlineCount(); ++ii )
{
const VECTOR2I holePt = fpHoles.Outline( ii ).CPoint( 0 );
for( int jj = 0; jj < aOutlines.OutlineCount(); ++jj )
{
if( aOutlines.Outline( jj ).PointInside( holePt ) )
{
aOutlines.AddHole( fpHoles.Outline( ii ), jj );
break;
}
}
}
return success;
}
/**
* Get the complete bounding box of the board (including all items).
*
* The vertex numbers and segment numbers of the rectangle returned.
* 1
* *---------------*
* |1 2|
* 0| |2
* |0 3|
* *---------------*
* 3
*/
void buildBoardBoundingBoxPoly( const BOARD* aBoard, SHAPE_POLY_SET& aOutline )
{
BOX2I bbbox = aBoard->GetBoundingBox();
SHAPE_LINE_CHAIN chain;
// If null area, uses the global bounding box.
if( ( bbbox.GetWidth() ) == 0 || ( bbbox.GetHeight() == 0 ) )
bbbox = aBoard->ComputeBoundingBox( false );
// Ensure non null area. If happen, gives a minimal size.
if( ( bbbox.GetWidth() ) == 0 || ( bbbox.GetHeight() == 0 ) )
bbbox.Inflate( pcbIUScale.mmToIU( 1.0 ) );
// Inflate slightly (by 1/10th the size of the box)
bbbox.Inflate( bbbox.GetWidth() / 10, bbbox.GetHeight() / 10 );
chain.Append( bbbox.GetOrigin() );
chain.Append( bbbox.GetOrigin().x, bbbox.GetEnd().y );
chain.Append( bbbox.GetEnd() );
chain.Append( bbbox.GetEnd().x, bbbox.GetOrigin().y );
chain.SetClosed( true );
aOutline.RemoveAllContours();
aOutline.AddOutline( chain );
}
VECTOR2I projectPointOnSegment( const VECTOR2I& aEndPoint, const SHAPE_POLY_SET& aOutline,
int aOutlineNum = 0 )
{
int minDistance = -1;
VECTOR2I projPoint;
for( auto it = aOutline.CIterateSegments( aOutlineNum ); it; it++ )
{
auto seg = it.Get();
int dis = seg.Distance( aEndPoint );
if( minDistance < 0 || ( dis < minDistance ) )
{
minDistance = dis;
projPoint = seg.NearestPoint( aEndPoint );
}
}
return projPoint;
}
int findEndSegments( SHAPE_LINE_CHAIN& aChain, SEG& aStartSeg, SEG& aEndSeg )
{
int foundSegs = 0;
for( int i = 0; i < aChain.SegmentCount(); i++ )
{
SEG seg = aChain.Segment( i );
bool foundA = false;
bool foundB = false;
for( int j = 0; j < aChain.SegmentCount(); j++ )
{
// Don't test the segment against itself
if( i == j )
continue;
SEG testSeg = aChain.Segment( j );
if( testSeg.Contains( seg.A ) )
foundA = true;
if( testSeg.Contains( seg.B ) )
foundB = true;
}
// This segment isn't a start or end
if( foundA && foundB )
continue;
if( foundSegs == 0 )
{
// The first segment we encounter is the "start" segment
wxLogTrace( traceBoardOutline, wxT( "Found start segment: (%d, %d)-(%d, %d)" ),
seg.A.x, seg.A.y, seg.B.x, seg.B.y );
aStartSeg = seg;
foundSegs++;
}
else
{
// Once we find both start and end, we can stop
wxLogTrace( traceBoardOutline, wxT( "Found end segment: (%d, %d)-(%d, %d)" ),
seg.A.x, seg.A.y, seg.B.x, seg.B.y );
aEndSeg = seg;
foundSegs++;
break;
}
}
return foundSegs;
}
bool BuildFootprintPolygonOutlines( BOARD* aBoard, SHAPE_POLY_SET& aOutlines, int aErrorMax,
int aChainingEpsilon, OUTLINE_ERROR_HANDLER* aErrorHandler )
{
FOOTPRINT* footprint = aBoard->GetFirstFootprint();
// No footprint loaded
if( !footprint )
{
wxLogTrace( traceBoardOutline, wxT( "No footprint found on board" ) );
return false;
}
PCB_TYPE_COLLECTOR items;
SHAPE_POLY_SET outlines;
bool success = false;
SCOPED_FLAGS_CLEANER cleaner( SKIP_STRUCT );
// Get all the SHAPEs into 'items', then keep only those on layer == Edge_Cuts.
items.Collect( aBoard, { PCB_SHAPE_T } );
// Make a working copy of aSegList, because the list is modified during calculations
std::vector<PCB_SHAPE*> segList;
for( int ii = 0; ii < items.GetCount(); ii++ )