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Formally minkowsky sum now is allowed with empty polygon arguments

This commit is contained in:
Matthias Koefferlein 2023-02-15 00:29:26 +01:00
parent a54ea1f273
commit 93d9298b51
1 changed files with 7 additions and 1 deletions
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8
src/db/db/dbPolygonTools.cc
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@ -2143,6 +2143,10 @@ ms_extraction (db::EdgeProcessor &ep, bool resolve_holes)
static db::Polygon
do_minkowski_sum (const db::Polygon &a, const db::Edge &b, bool resolve_holes)
{
if (a.begin_hull () == a.end_hull ()) {
return db::Polygon ();
}
db::EdgeProcessor ep;
db::ms_production (a, b.p1 (), b.p2 (), ep);
return db::ms_extraction (ep, resolve_holes);
@ -2161,7 +2165,9 @@ minkowski_sum (const db::Polygon &a, const db::Edge &b, bool rh)
static db::Polygon
do_minkowski_sum (const db::Polygon &a, const db::Polygon &b, bool resolve_holes)
{
tl_assert (a.begin_hull () != a.end_hull ());
if (a.begin_hull () == a.end_hull () || b.begin_hull () == b.end_hull ()) {
return db::Polygon ();
}
db::Vector p0 = *a.begin_hull () - db::Point ();