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-rw-r--r--core/math/geometry_2d.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/core/math/geometry_2d.cpp b/core/math/geometry_2d.cpp
index 1e5f12bebf..602e95bc13 100644
--- a/core/math/geometry_2d.cpp
+++ b/core/math/geometry_2d.cpp
@@ -37,7 +37,7 @@
#define SCALE_FACTOR 100000.0 // Based on CMP_EPSILON.
-Vector<Vector<Vector2>> Geometry2D::decompose_polygon_in_convex(Vector<Point2> polygon) {
+Vector<Vector<Vector2>> Geometry2D::decompose_polygon_in_convex(const Vector<Point2> &polygon) {
Vector<Vector<Vector2>> decomp;
List<TPPLPoly> in_poly, out_poly;