Add Length function to Vector

include/vec.h

@@ -12,10 +12,10 @@ struct Vector
 
     inline void Normalize(void)
     {
-        float length = sqrtf(x*x + y*y + z*z);
+        float length = Length();
 
         // zero length
-        if (length < EPSILON_E3)
+        if (length == 0.0f)
         {
             x = 0.0f;
             y = 0.0f;
@@ -31,6 +31,19 @@ struct Vector
         }
     }
 
+    inline float Length(void)
+    {
+        float result = sqrtf(x*x + y*y + z*z);
+
+        // zero length
+        if (result < EPSILON_E3)
+        {
+            result = 0.0f;
+        }
+
+        return result;
+    }
+
     inline static float Dot(Vector v1, Vector v2)
     {
         float result;
@@ -96,6 +109,18 @@ inline Vector &operator+=(Vector &v1, Vector v2)
     return v1;
 }
 
+// f * v
+inline Vector operator*(float f, Vector &v)
+{
+    Vector result;
+
+    result.x = v.x * f;
+    result.y = v.y * f;
+    result.z = v.z * f;
+
+    return result;
+}
+
 // v / f
 inline Vector operator/(Vector v, float f)
 {