Added player support to the server

This code is essentially copied from the old branch, since the two
branches are now functionally identical. How much time have I wasted
rewriting this?

common/network/network_packet.hpp

@@ -24,6 +24,8 @@
 
 #include "SDL/SDL_net.h"
 
+#include "vector2.hpp"
+
 #define PACKET_STRING_SIZE 100
 
 #pragma pack(push, 0)
@@ -56,6 +58,9 @@ union NetworkPacket {
 		SHUTDOWN = 9,
 
 		//Player movement, etc.
+		PLAYER_NEW = 10,
+		PLAYER_DELETE = 11,
+		PLAYER_UPDATE = 12,
 	};
 
 	//metadata on the packet itself
@@ -78,6 +83,17 @@ union NetworkPacket {
 		int index;
 	}clientInfo;
 
+	//information about a player
+	struct PlayerInformation {
+		Metadata meta;
+		int clientIndex;
+		int playerIndex;
+		char handle[PACKET_STRING_SIZE];
+		char avatar[PACKET_STRING_SIZE];
+		Vector2 position;
+		Vector2 motion;
+	}playerInfo;
+
 	//defaults
 	NetworkPacket() {
 		meta.type = Type::NONE;

common/vector2.hpp

@@ -0,0 +1,115 @@
+/* Copyright: (c) Kayne Ruse 2013
+ * 
+ * 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 VECTOR2_HPP_
+#define VECTOR2_HPP_
+
+#include <stdexcept>
+#include <cmath>
+
+class Vector2 {
+public:
+	double x, y;
+
+	//This is explicitly a POD
+	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;
+	}
+
+	double operator[](size_t i) {
+		if (i >= 2)
+			throw(std::domain_error("Out of range"));
+		return *(&x+i);
+	}
+
+	//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;
+	}
+
+	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); }
+};
+
+//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; }
+
+#endif