1 files changed, 6 insertions, 0 deletions

diff --git a/src/math/Vector2D.h b/src/math/Vector2D.h
index 3c0013d4..fa32bd9b 100644
--- a/src/math/Vector2D.h
+++ b/src/math/Vector2D.h
@@ -31,6 +31,12 @@ public:
 };
 
 inline float
+DotProduct2D(const CVector2D &v1, const CVector2D &v2)
+{
+	return v1.x*v2.x + v1.y*v2.y;
+}
+
+inline float
 CrossProduct2D(const CVector2D &v1, const CVector2D &v2)
 {
 	return v1.x*v2.y - v1.y*v2.x;