From dcdbbe938db945c6d57373c0205c2ef52ab0fc04 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Mon, 15 Dec 2014 13:43:53 +1100
Subject: [PATCH] matrix: add scalar multiply

---
 matrix.cpp | 12 ++++++++++++
 matrix.hpp |  4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/matrix.cpp b/matrix.cpp
index 68d8cb00..8fdd4262 100644
--- a/matrix.cpp
+++ b/matrix.cpp
@@ -336,6 +336,18 @@ matrix<T>::operator* (const vector<4> &rhs) const {
 }
 
 
+//-----------------------------------------------------------------------------
+template <typename T>
+matrix<T>&
+matrix<T>::operator*= (T f){
+    for (size_t i = 0; i < 4; ++i)
+        for (size_t j = 0; j < 4; ++j)
+            values[i][j] *= f;
+
+    return *this;
+}
+
+
 //-----------------------------------------------------------------------------
 template <typename T>
 matrix<T>
diff --git a/matrix.hpp b/matrix.hpp
index 5751d0ff..40b4ad0a 100644
--- a/matrix.hpp
+++ b/matrix.hpp
@@ -48,8 +48,8 @@ namespace util {
         matrix<T> operator* (const matrix<T>&) const;
         vector<4> operator* (const vector<4>&) const;
 
-        matrix<T> operator/ (T) const;
-
+        matrix<T>& operator*= (T);
+        matrix<T>  operator/  (T) const;
         matrix<T>& operator/= (T);
 
         bool operator== (const matrix<T>&) const;