handle the fact that the right and bottom edges of polygons are not "inside" the polygon

1 files changed, 4 insertions, 0 deletions

diff --git a/sigmodr/widgets/mapeditor/WorldMapPlacement.cpp b/sigmodr/widgets/mapeditor/WorldMapPlacement.cpp
index 8ef35d9c..33dfeac6 100644
--- a/sigmodr/widgets/mapeditor/WorldMapPlacement.cpp
+++ b/sigmodr/widgets/mapeditor/WorldMapPlacement.cpp
@@ -68,11 +68,15 @@ static bool touches(const QPolygon& polygon1, const QPolygon& polygon2)
     {
         if (polygon2.containsPoint(point, Qt::OddEvenFill))
             return true;
+        if (polygon2.containsPoint(point - QPoint(1, 1), Qt::OddEvenFill))
+            return true;
     }
     foreach (const QPoint& point, polygon2)
     {
         if (polygon1.containsPoint(point, Qt::OddEvenFill))
             return true;
+        if (polygon1.containsPoint(point - QPoint(1, 1), Qt::OddEvenFill))
+            return true;
     }
     return false;
 }