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-rw-r--r--src/point.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/point.hpp b/src/point.hpp
index 6d3caf72..285d2f30 100644
--- a/src/point.hpp
+++ b/src/point.hpp
@@ -38,6 +38,8 @@ struct point
static constexpr uint32_t distance(point a, point b);
static constexpr uint32_t distance_l2(point a, point b);
+ friend constexpr Vector2i operator-(const point& p1, const point& p2);
+
private:
int16_t cx = 0, cy = 0;
int8_t cz = 0;