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MODULE::CoverageRatio(): replace wxRegion (not working for us on Windows) by polygons to calculate areas. 

At least on Windows, using wxRegion generates crashes.

Fixes: lp:1740646
https://bugs.launchpad.net/kicad/+bug/1740646
This commit is contained in:
jean-pierre charras 2017-12-31 17:46:38 +01:00
parent 03e9f0c94a
commit 11d1188fdf
2 changed files with 38 additions and 11 deletions
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2
common/geometry/shape_line_chain.cpp
View File

@ -626,6 +626,8 @@ const VECTOR2I SHAPE_LINE_CHAIN::PointAlong( int aPathLength ) const
double SHAPE_LINE_CHAIN::Area() const
{
// see https://www.mathopenref.com/coordpolygonarea2.html
if( !m_closed )
return 0.0;

45
pcbnew/class_module.cpp
View File

@ -1240,35 +1240,60 @@ wxString MODULE::GetReferencePrefix() const
}
double CalcArea( wxRegion aRegion )
// Calculate the area of aPolySet, after fracturation, because
// polygons with no hole are expected.
static double polygonArea( SHAPE_POLY_SET& aPolySet )
{
double area = 0.0;
for( wxRegionIterator iterator( aRegion ); iterator.HaveRects(); iterator++ )
for( int ii = 0; ii < aPolySet.OutlineCount(); ii++ )
{
wxRect aRect = iterator.GetRect();
area += static_cast<double>( aRect.GetWidth() ) * aRect.GetHeight();
SHAPE_LINE_CHAIN& outline = aPolySet.Outline( ii );
// Ensure the curr outline is closed, to calculate area
outline.SetClosed( true );
area += outline.Area();
}
return area;
}
// a helper function to add a rectangular polygon aRect to aPolySet
static void addRect( SHAPE_POLY_SET& aPolySet, wxRect aRect )
{
aPolySet.NewOutline();
aPolySet.Append( aRect.GetX(), aRect.GetY() );
aPolySet.Append( aRect.GetX()+aRect.width, aRect.GetY() );
aPolySet.Append( aRect.GetX()+aRect.width, aRect.GetY()+aRect.height );
aPolySet.Append( aRect.GetX(), aRect.GetY()+aRect.height );
}
double MODULE::CoverageRatio() const
{
double moduleArea = GetFootprintRect().GetArea();
wxRegion uncoveredRegion( GetFootprintRect() );
SHAPE_POLY_SET coveredRegion;
addRect(coveredRegion, GetFootprintRect() );
// build hole list if full area
SHAPE_POLY_SET holes;
for( D_PAD* pad = m_Pads; pad; pad = pad->Next() )
uncoveredRegion.Subtract( pad->GetBoundingBox() );
addRect( holes, pad->GetBoundingBox() );
for( BOARD_ITEM* item = m_Drawings; item; item = item->Next() )
uncoveredRegion.Subtract( item->GetBoundingBox() );
addRect( holes, item->GetBoundingBox() );
uncoveredRegion.Subtract( m_Reference->GetBoundingBox() );
uncoveredRegion.Subtract( m_Value->GetBoundingBox() );
addRect( holes, m_Reference->GetBoundingBox() );
addRect( holes, m_Value->GetBoundingBox() );
double coveredArea = moduleArea - CalcArea( uncoveredRegion );
SHAPE_POLY_SET uncoveredRegion;
uncoveredRegion.BooleanSubtract( coveredRegion, holes, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
uncoveredRegion.Simplify( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
uncoveredRegion.Fracture( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
double uncoveredRegionArea = polygonArea( uncoveredRegion );
double coveredArea = moduleArea - uncoveredRegionArea;
double ratio = ( coveredArea / moduleArea );
return std::min( ratio, 1.0 );
}