From b17ca1d07d5726469e247e9326a56f8b2ee1644f Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 2 Apr 2018 17:57:20 +0200
Subject: Improve boundary cond impl via better vector support

---
 src/vector.h | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/vector.h b/src/vector.h
index e0dc239..3a3ed5c 100644
--- a/src/vector.h
+++ b/src/vector.h
@@ -31,6 +31,10 @@ struct Vector {
 		};
 	}
 
+	Vector<T> operator-() const {
+		return -1 * *this;
+	}
+
 	Vector<T>& operator+=(const Vector<T>& rhs) {
 		data[0] += rhs[0];
 		data[1] += rhs[1];
@@ -39,9 +43,25 @@ struct Vector {
 };
 
 template <typename T>
-Vector<T> operator*(T scalar, const Vector<T>& vec) {
+Vector<T> operator*(T scalar, const Vector<T>& v) {
+	return Vector<T>{
+		v[0] * scalar,
+		v[1] * scalar
+	};
+}
+
+template <typename T, typename W>
+Vector<T> operator-(const Vector<T>& a, const Vector<W>& b) {
+	return Vector<T>{
+		a[0] - b[0],
+		a[1] - b[1]
+	};
+}
+
+template <typename T, typename W>
+Vector<T> operator+(const Vector<T>& a, const Vector<W>& b) {
 	return Vector<T>{
-		vec[0] * scalar,
-		vec[1] * scalar
+		a[0] + b[0],
+		a[1] + b[1]
 	};
 }
-- 
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