Imported the files from branch 'fixed-map'

common/utilities/simple_rng.hpp

@@ -0,0 +1,42 @@
+/* Copyright: (c) Kayne Ruse 2014
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#ifndef SIMPLERNG_HPP_
+#define SIMPLERNG_HPP_
+
+//a simple, stateless, random number generator
+class SimpleRNG {
+public:
+	SimpleRNG() { SetSeed(8891.0); }
+	SimpleRNG(double x) { SetSeed(x); }
+
+	double SetSeed(double s) { return seed = s; }
+	double GetSeed() { return seed; }
+
+	double operator()(double x) {
+		return (x + seed) * 11235.0 + 81321.0;
+	};
+
+private:
+	double seed;
+};
+
+#endif

common/utilities/vector2.hpp

@@ -41,6 +41,11 @@ public:
 	double SquaredLength() const {
 		return x*x+y*y;
 	}
+	void Normalize() {
+		double l = Length();
+		x /= l;
+		y /= l;
+	}
 
 	//Arithmetic operators
 	Vector2 operator+(Vector2 v) const {
@@ -97,15 +102,6 @@ public:
 	template<typename T> bool operator!=(T t) { return (x != t || y != t); }
 };
 
-//non-member templates (flip the order)
-template<typename T> Vector2 operator+(T t, Vector2 v) { return v + t; }
-template<typename T> Vector2 operator-(T t, Vector2 v) { return v - t; }
-template<typename T> Vector2 operator*(T t, Vector2 v) { return v * t; }
-template<typename T> Vector2 operator/(T t, Vector2 v) { return v / t; }
-
-template<typename T> bool operator==(T t, Vector2 v) { return v == t; }
-template<typename T> bool operator!=(T t, Vector2 v) { return v != t; }
-
 //This is explicitly a POD
 static_assert(std::is_pod<Vector2>::value, "Vector2 is not a POD");