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Apply the min-width-by-min-width test to islands after pruning. 

We're looking for minimum *web* width.  A blob does not a web make.

Fixes https://gitlab.com/kicad/code/kicad/issues/6907

(cherry picked from commit 1a2e0d8226)
This commit is contained in:
Jeff Young 2022-04-10 18:20:34 +01:00
parent 63ce2307c8
commit 601995c759
1 changed files with 13 additions and 0 deletions
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13
pcbnew/zone_filler.cpp
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@ -1188,6 +1188,19 @@ bool ZONE_FILLER::computeRawFilledArea( const ZONE* aZone,
if( half_min_width - epsilon > epsilon ) if( half_min_width - epsilon > epsilon )
aRawPolys.Deflate( half_min_width - epsilon, numSegs, cornerStrategy ); aRawPolys.Deflate( half_min_width - epsilon, numSegs, cornerStrategy );
// Min-thickness is the web thickness. On the other hand, a blob min-thickness by
// min-thickness is not useful. Since there's no obvious definition of web vs. blob, we
// arbitrarily choose "at least 2X the area".
double minArea = (double) aZone->GetMinThickness() * aZone->GetMinThickness() * 2;
for( int ii = aFillPolys.OutlineCount() - 1; ii >= 0; ii-- )
{
std::vector<SHAPE_LINE_CHAIN>& island = aFillPolys.Polygon( ii );
if( island.empty() || island.front().Area() < minArea )
aFillPolys.DeletePolygon( ii );
}
DUMP_POLYS_TO_COPPER_LAYER( aRawPolys, In9_Cu, wxT( "deflated" ) ); DUMP_POLYS_TO_COPPER_LAYER( aRawPolys, In9_Cu, wxT( "deflated" ) );
if( m_progressReporter && m_progressReporter->IsCancelled() ) if( m_progressReporter && m_progressReporter->IsCancelled() )