diff --git a/a8/vec2.cc b/a8/vec2.cc
index 9c76cc0..40c064f 100644
--- a/a8/vec2.cc
+++ b/a8/vec2.cc
@@ -118,4 +118,10 @@ namespace a8
     {
         return fabs(sqrt(x*x + y*y));
     }
+
+    bool Vec2::IsZero()
+    {
+        return fabs(x) < 0.00001f && fabs(y) < 0.00001f;
+    }
+
 }
diff --git a/a8/vec2.h b/a8/vec2.h
index 8f93654..b9ed1c8 100644
--- a/a8/vec2.h
+++ b/a8/vec2.h
@@ -26,6 +26,7 @@ namespace a8
         Vec2 Perp();
         float Dot(const Vec2& v) const;
         float Norm() const;
+        bool IsZero();
 
         static const Vec2 UP;
         static const Vec2 DOWN;