From 12f709042181115db56bf7fc6e234aaaed751b9d Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Sun, 23 May 2010 22:36:59 +0200
Subject: Added operator overloaders to vector classes.

---
 engine/vector.cpp | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 engine/vector.h   | 11 ++++++++++
 2 files changed, 71 insertions(+)

diff --git a/engine/vector.cpp b/engine/vector.cpp
index c23466e..6c71991 100644
--- a/engine/vector.cpp
+++ b/engine/vector.cpp
@@ -26,6 +26,20 @@ Vector2& Vector2::operator+=(const Vector2& v) {
 	return *this;
 }
 
+Vector2& Vector2::operator+(const Vector2& v) {
+	return Vector2(*this) += v;
+}
+
+Vector2& Vector2::operator-=(const Vector2& v) {
+	x -= v.x;
+	y -= v.y;
+	return *this;
+}
+
+Vector2& Vector2::operator-(const Vector2& v) {
+	return Vector2(*this) -= v;
+}
+
 Vector3::Vector3() : Vector2() {
 	z = 0;
 }
@@ -49,6 +63,28 @@ Vector3& Vector3::operator=(const Vector3& v) {
 	return *this;
 }
 
+Vector3& Vector3::operator+=(const Vector3& v) {
+	x += v.x;
+	y += v.y;
+	z += v.z;
+	return *this;
+}
+
+Vector3& Vector3::operator+(const Vector3& v) {
+	return Vector3(*this) += v;
+}
+
+Vector3& Vector3::operator-=(const Vector3& v) {
+	x -= v.x;
+	y -= v.y;
+	z -= v.z;
+	return *this;
+}
+
+Vector3& Vector3::operator-(const Vector3& v) {
+	return Vector3(*this) -= v;
+}
+
 Vector4::Vector4() : Vector3() {
 	w = 0;
 }
@@ -71,3 +107,27 @@ Vector4& Vector4::operator=(const Vector4& v) {
 	w = v.w;
 	return *this;
 }
+
+Vector4& Vector4::operator+=(const Vector4& v) {
+	x += v.x;
+	y += v.y;
+	z += v.z;
+	w += v.w;
+	return *this;
+}
+
+Vector4& Vector4::operator+(const Vector4& v) {
+	return Vector4(*this) += v;
+}
+
+Vector4& Vector4::operator-=(const Vector4& v) {
+	x -= v.x;
+	y -= v.y;
+	z -= v.z;
+	w -= v.w;
+	return *this;
+}
+
+Vector4& Vector4::operator-(const Vector4& v) {
+	return Vector4(*this) -= v;
+}
diff --git a/engine/vector.h b/engine/vector.h
index 127ca81..8d85684 100644
--- a/engine/vector.h
+++ b/engine/vector.h
@@ -16,6 +16,9 @@ class Vector2 {
 		
 		Vector2& operator=(const Vector2& v);
 		Vector2& operator+=(const Vector2& v);
+		Vector2& operator+(const Vector2& v);
+		Vector2& operator-=(const Vector2& v);
+		Vector2& operator-(const Vector2& v);
 };
 
 class Vector3 : public Vector2 {
@@ -29,6 +32,10 @@ class Vector3 : public Vector2 {
 		Vector3(const Vector3& v);
 		
 		Vector3& operator=(const Vector3& v);
+		Vector3& operator+=(const Vector3& v);
+		Vector3& operator+(const Vector3& v);
+		Vector3& operator-=(const Vector3& v);
+		Vector3& operator-(const Vector3& v);
 };
 
 class Vector4 : public Vector3 {
@@ -42,6 +49,10 @@ class Vector4 : public Vector3 {
 		Vector4(const Vector4& v);
 
 		Vector4& operator=(const Vector4& v);
+		Vector4& operator+=(const Vector4& v);
+		Vector4& operator+(const Vector4& v);
+		Vector4& operator-=(const Vector4& v);
+		Vector4& operator-(const Vector4& v);
 };
 
 #endif
-- 
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