vector_normalize.patch

diff --git a/lib/matrix.rb b/lib/matrix.rb
index 3fda08b..d33b3df 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -1479,6 +1479,13 @@ class Vector
   end
 
   #
+  # Creates a normalized vector.
+  #
+  def normalize
+    self / self.r
+  end
+
+  #
   # Returns the elements of the vector in an array.
   #
   def to_a
diff --git a/test/matrix/test_vector.rb b/test/matrix/test_vector.rb
index 582509f..821d692 100644
--- a/test/matrix/test_vector.rb
+++ b/test/matrix/test_vector.rb
@@ -131,4 +131,8 @@ class TestVector < Test::Unit::TestCase
     assert_equal("Vector[1, 2, 3]", @v1.inspect)
   end
 
+  def test_normalize
+    assert_equal(Vector[0.2672612419124244, 0.5345224838248488, 0.8017837257372732],
+                 Vector[1, 2, 3].normalize)
+  end
 end