added ball to ball collisions

[physics.git] / src / Vector2.h

diff --git a/src/Vector2.h b/src/Vector2.h
index 00b921b..13ffd88 100644 (file)
--- a/src/Vector2.h
+++ b/src/Vector2.h
@@ -39,6 +39,9 @@ class Vector2
 
     float angle() const;
     float length() const;
+    float sqrLength() const;
+
+    float dot(const Vector2&) const;
 
     Vector2 add(const Vector2&) const;
     Vector2 subtract(const Vector2&) const;