1 files changed, 9 insertions, 0 deletions
diff --git a/Vector.h b/Vector.h
index f884c49..cb55637 100644
--- a/Vector.h
+++ b/Vector.h
@@ -2,6 +2,7 @@
 #define _VECTOR_H_
 
 #include "Vertex.h"
+#include <math.h>
 
 class Vector : public Vertex {
   public:
@@ -33,6 +34,14 @@ class Vector : public Vertex {
     float dot(const Vector &v) const {
       return x*v.x + y*v.y + z*v.z;
     }
+
+    float length() const {
+      return sqrtf(x*x+y*y+z*z);
+    }
+
+    Vector normalize() const {
+      return *this/length();
+    }
 };
 
 static inline Vector operator-(const Vertex &v1, const Vertex &v2) {