The submodules and common/ compiles

Please note that there are duplicate copies of vector2.hpp and
bounding_box.hpp

common/makefile

@@ -1,12 +1,10 @@
 #output
-export OUTDIR=..
+export OUTDIR=../..
 export OUT=$(addprefix $(OUTDIR)/,libcommon.a)
 
 all: $(OUTDIR)
 	$(MAKE) -C debugging
-	$(MAKE) -C gameplay
-	$(MAKE) -C graphics
-	$(MAKE) -C map
+	$(MAKE) -C global_defines
 	$(MAKE) -C network
 	$(MAKE) -C utilities
 

common/network/makefile

@@ -1,5 +1,5 @@
 #config
-INCLUDES+=. packet_types ../gameplay ../map ../utilities
+INCLUDES+=. packet_types ../global_defines ../utilities ../../TurtleMap
 LIBS+=
 CXXFLAGS+=-std=c++11 $(addprefix -I,$(INCLUDES))
 

common/network/packet_types/makefile

@@ -1,5 +1,5 @@
 #config
-INCLUDES+=. .. ../../gameplay ../../map ../../utilities
+INCLUDES+=. .. ../../global_defines ../../utilities ../../../TurtleMap
 LIBS+=
 CXXFLAGS+=-std=c++11 $(addprefix -I,$(INCLUDES))
 

common/utilities/bounding_box.hpp

@@ -0,0 +1,75 @@
+/* Copyright: (c) Kayne Ruse 2013-2016
+ * 
+ * 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.
+*/
+#pragma once
+
+#include <type_traits>
+#include <algorithm>
+
+class BoundingBox {
+public:
+	//This is explicitly a POD
+	int x, y;
+	int w, h;
+
+	BoundingBox() = default;
+	BoundingBox(int i, int j): x(i), y(j), w(0), h(0) {};
+	BoundingBox(int i, int j, int k, int l): x(i), y(j), w(k), h(l) {};
+	~BoundingBox() = default;
+	BoundingBox& operator=(BoundingBox const&) = default;
+
+	int Size() {
+		return std::max(w*h,0);
+	}
+
+	bool CheckOverlap(BoundingBox rhs) {
+		return !(
+			x >= rhs.x + rhs.w ||
+			y >= rhs.y + rhs.h ||
+			rhs.x >= x + w ||
+			rhs.y >= y + h);
+	}
+
+	BoundingBox CalcOverlap(BoundingBox rhs) {
+		if (!CheckOverlap(rhs)) {
+			return {0, 0, 0, 0};
+		}
+		BoundingBox ret;
+		ret.x = std::max(x, rhs.x);
+		ret.y = std::max(y, rhs.y);
+		ret.w = std::min(x+w, rhs.x+rhs.w) - ret.x;
+		ret.h = std::min(y+h, rhs.y+rhs.h) - ret.y;
+		return ret;
+	}
+};
+
+//This is explicitly a POD
+static_assert(std::is_pod<BoundingBox>::value, "BoundingBox is not a POD");
+
+#include "vector2.hpp"
+
+//operators
+inline BoundingBox operator+(BoundingBox b, Vector2 v) {
+	return {b.x + (int)v.x, b.y + (int)v.y, b.w, b.h};
+}
+inline BoundingBox operator+(Vector2 v, BoundingBox b) {
+	return b + v;
+}

common/utilities/vector2.hpp

@@ -0,0 +1,111 @@
+/* Copyright: (c) Kayne Ruse 2013-2016
+ * 
+ * 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.
+*/
+#pragma once
+
+#include <type_traits>
+#include <stdexcept>
+#include <cmath>
+
+class Vector2 {
+public:
+	double x, y;
+
+	Vector2() = default;
+	Vector2(double i, double j): x(i), y(j) {};
+	~Vector2() = default;
+	Vector2& operator=(Vector2 const&) = default;
+
+	double Length() const {
+		return sqrt(x*x+y*y);
+	}
+	double SquaredLength() const {
+		return x*x+y*y;
+	}
+	void Normalize() {
+		double l = Length();
+		if (l == 0)
+			throw(std::domain_error("Divide by zero"));
+		x /= l;
+		y /= l;
+	}
+
+	//Arithmetic operators
+	Vector2 operator+(Vector2 v) const {
+		Vector2 ret;
+		ret.x = x + v.x;
+		ret.y = y + v.y;
+		return ret;
+	}
+	Vector2 operator-(Vector2 v) const {
+		Vector2 ret;
+		ret.x = x - v.x;
+		ret.y = y - v.y;
+		return ret;
+	}
+	Vector2 operator*(Vector2 v) const {
+		Vector2 ret;
+		ret.x = x * v.x;
+		ret.y = y * v.y;
+		return ret;
+	}
+	Vector2 operator*(double d) const {
+		Vector2 ret;
+		ret.x = x * d;
+		ret.y = y * d;
+		return ret;
+	}
+
+	Vector2 operator/(Vector2 v) {
+		if (!v.x || !v.y)
+			throw(std::domain_error("Divide by zero"));
+		Vector2 ret;
+		ret.x = x / v.x;
+		ret.y = y / v.y;
+		return ret;
+	}
+	Vector2 operator/(double d) {
+		if (!d)
+			throw(std::domain_error("Divide by zero"));
+		Vector2 ret;
+		ret.x = x / d;
+		ret.y = y / d;
+		return ret;
+	}
+
+	//unary operators
+	Vector2 operator-() { return {-x, -y}; }
+
+	//comparison operators
+	bool operator==(Vector2 v) { return (x == v.x && y == v.y); }
+	bool operator!=(Vector2 v) { return (x != v.x || y != v.y); }
+
+	//member templates (curry the above operators)
+	template<typename T> Vector2 operator+=(T t) { return *this = *this + t; }
+	template<typename T> Vector2 operator-=(T t) { return *this = *this - t; }
+	template<typename T> Vector2 operator*=(T t) { return *this = *this * t; }
+	template<typename T> Vector2 operator/=(T t) { return *this = *this / t; }
+	template<typename T> bool operator==(T t) { return (x == t && y == t); }
+	template<typename T> bool operator!=(T t) { return (x != t || y != t); }
+};
+
+//This is explicitly a POD
+static_assert(std::is_pod<Vector2>::value, "Vector2 is not a POD");