From 862d5a4bf2e17f3d5ef9a81f4be9b8271253b6ed Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Fri, 26 Jul 2013 18:12:22 +0200
Subject: [PATCH] Added scalar addition and subtraction operators.

---
 include/math/vector2d.h | 44 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/include/math/vector2d.h b/include/math/vector2d.h
index 675e74d15f..a5eaa604e0 100644
--- a/include/math/vector2d.h
+++ b/include/math/vector2d.h
@@ -215,15 +215,27 @@ public:
     /// Vector addition operator
     VECTOR2<T> operator+( const VECTOR2<T>& aVector ) const;
 
+    /// Scalar addition operator
+    VECTOR2<T> operator+( const T& aScalar ) const;
+
     /// Compound assignment operator
     VECTOR2<T>& operator+=( const VECTOR2<T>& aVector );
 
+    /// Compound assignment operator
+    VECTOR2<T>& operator+=( const T& aScalar );
+
     /// Vector subtraction operator
     VECTOR2<T> operator-( const VECTOR2<T>& aVector ) const;
 
+    /// Scalar subtraction operator
+    VECTOR2<T> operator-( const T& aScalar ) const;
+
     /// Compound assignment operator
     VECTOR2<T>& operator-=( const VECTOR2<T>& aVector );
 
+    /// Compound assignment operator
+    VECTOR2<T>& operator-=( const T& aScalar );
+
     /// Negate Vector operator
     VECTOR2<T> operator-();
 
@@ -330,6 +342,15 @@ VECTOR2<T>& VECTOR2<T>::operator+=( const VECTOR2<T>& aVector )
 }
 
 
+template <class T>
+VECTOR2<T>& VECTOR2<T>::operator+=( const T& aScalar )
+{
+    x   += aScalar;
+    y   += aScalar;
+    return *this;
+}
+
+
 template <class T>
 VECTOR2<T>& VECTOR2<T>::operator-=( const VECTOR2<T>& aVector )
 {
@@ -339,6 +360,15 @@ VECTOR2<T>& VECTOR2<T>::operator-=( const VECTOR2<T>& aVector )
 }
 
 
+template <class T>
+VECTOR2<T>& VECTOR2<T>::operator-=( const T& aScalar )
+{
+    x   -= aScalar;
+    y   -= aScalar;
+    return *this;
+}
+
+
 template <class T>
 int VECTOR2<T>::LineSide( const VECTOR2<T>& aStart, const VECTOR2<T>& aEnd ) const
 {
@@ -463,6 +493,13 @@ VECTOR2<T> VECTOR2<T>::operator+( const VECTOR2<T>& aVector ) const
 }
 
 
+template <class T>
+VECTOR2<T> VECTOR2<T>::operator+( const T& aScalar ) const
+{
+    return VECTOR2<T> ( x + aScalar, y + aScalar );
+}
+
+
 template <class T>
 VECTOR2<T> VECTOR2<T>::operator-( const VECTOR2<T>& aVector ) const
 {
@@ -470,6 +507,13 @@ VECTOR2<T> VECTOR2<T>::operator-( const VECTOR2<T>& aVector ) const
 }
 
 
+template <class T>
+VECTOR2<T> VECTOR2<T>::operator-( const T& aScalar ) const
+{
+    return VECTOR2<T> ( x - aScalar, y - aScalar );
+}
+
+
 template <class T>
 VECTOR2<T> VECTOR2<T>::operator-()
 {