X-Git-Url: http://git.localhorst.tv/?p=space.git;a=blobdiff_plain;f=src%2Fgraphics%2FVector.h;fp=src%2Fgraphics%2FVector.h;h=34d829713e5dea735d339b0ed56cafdb3a409d11;hp=b5c6d7d11dd9f9452c0a65b781a511b8fa9603ad;hb=1129b8ac89f1e614f69793227ccec90157708aea;hpb=61c2d30a60d586cbe63885885c6a373c7713af1e

diff --git a/src/graphics/Vector.h b/src/graphics/Vector.h
index b5c6d7d..34d8297 100644
--- a/src/graphics/Vector.h
+++ b/src/graphics/Vector.h
@@ -3,6 +3,7 @@
 
 #include <algorithm>
 #include <ostream>
+#include <SDL.h>
 
 
 namespace space {
@@ -29,12 +30,50 @@ public:
 		return *this;
 	}
 
+	SDL_Point ToPoint() const {
+		SDL_Point p;
+		p.x = x;
+		p.y = y;
+		return p;
+	}
+
 public:
 	Scalar x;
 	Scalar y;
 
 };
 
+/// specialization with same layout as SDL_Point
+template<>
+class Vector<int>
+: public SDL_Point {
+
+public:
+	constexpr Vector() : SDL_Point({0, 0}) { }
+	constexpr Vector(int x, int y) : SDL_Point({x, y}) { }
+
+	template<class Other>
+	constexpr Vector(Vector<Other> other)
+	: SDL_Point({int(other.x), int(other.y)}) { }
+
+public:
+	Vector<int> &operator +=(Vector<int> other) {
+		x += other.x;
+		y += other.y;
+		return *this;
+	}
+	Vector<int> &operator -=(Vector<int> other) {
+		x -= other.x;
+		y -= other.y;
+		return *this;
+	}
+
+	SDL_Point ToPoint() const {
+		return *this;
+	}
+
+};
+
 
 template<class Scalar>
 constexpr Vector<Scalar> operator -(Vector<Scalar> v) {