diff --git a/.gitmodules b/.gitmodules
index 18b48dd..8a1aeb6 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "contrib/json-spirit"]
 	path = contrib/json-spirit
 	url = git://github.com/sirikata/json-spirit.git
+[submodule "simulation"]
+	path = simulation
+	url = git@github.com:Jaxan/beats-sim.git
diff --git a/simulation b/simulation
new file mode 160000
index 0000000..018cb17
--- /dev/null
+++ b/simulation
@@ -0,0 +1 @@
+Subproject commit 018cb176c4b3970cd2a6ecae8a63520183c5ddd3
diff --git a/src/adaptions.h b/src/adaptions.h
new file mode 100644
index 0000000..d5bc633
--- /dev/null
+++ b/src/adaptions.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <string>
+#include <boost/fusion/include/define_struct.hpp>
+#include <boost/fusion/include/adapt_struct.hpp>
+
+#include "simulation/Simulation.h"
+#include "simulation/Beat.h"
+#include "simulation/math.h"
+
+BOOST_FUSION_ADAPT_STRUCT(
+	::math::Vec2,
+	(float, x)
+	(float, y)
+)
+
+BOOST_FUSION_ADAPT_TPL_STRUCT(
+	(BallInfo),
+	(simulation::Ball) (BallInfo),
+	(BallInfo, information)
+	(::math::Vec2, position)
+	(::math::Vec2, speed)
+)
+
+BOOST_FUSION_ADAPT_TPL_STRUCT(
+	(LineInfo),
+	(simulation::Line) (LineInfo),
+	(::math::Vec2, starting_point)
+	(::math::Vec2, end_point)
+	(simulation::LineKind, line_kind)
+)
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 5af8427..bf62171 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -14,22 +14,24 @@
 
 std::unique_ptr<App> app;
 
+using namespace websockets;
+
 websockets::TestProtocol<User> default_protocol{
 	// connection established
-	[](User& user){
+	[](User& user, basic_websocket_info){
 		app->login(user);
 	},
 	// connection closed
-	[](User& user){
+	[](User& user, basic_websocket_info){
 		app->logout(user);
 	},
 	// write (will always come after receive)
-	[](User& user) -> std::string{
 		app->update_positions();
 		return write_json(ptrvector_to_json(app->people_online));
+	[](User& user, basic_websocket_info) -> std::string{
 	},
 	// receive
-	[](User& user, std::string in){
+	[](User& user, std::string in, basic_websocket_info){
 		try{
 			user = from_json<IncomingPacket>(parse_json(in));
 		} catch(std::exception& e) {
@@ -40,16 +42,16 @@ websockets::TestProtocol<User> default_protocol{
 
 websockets::TestProtocol<Empty> observer_protocol{
 	// connection established
-	[](Empty& user){},
+	[](Empty& user, basic_websocket_info){},
 	// connection closed
-	[](Empty& user){},
+	[](Empty& user, basic_websocket_info){},
 	// write (will always come after receive)
-	[](Empty& user) -> std::string{
 		app->update_positions();
 		return write_json(ptrvector_to_json(app->people_online));
+	[](Empty& user, basic_websocket_info) -> std::string{
 	},
 	// receive
-	[](Empty& user, std::string in){}
+	[](Empty& user, std::string in, basic_websocket_info){}
 };
 
 int main(int argc, char **argv){
diff --git a/src/websockets.cpp b/src/websockets.cpp
index e06f6fa..1191e14 100644
--- a/src/websockets.cpp
+++ b/src/websockets.cpp
@@ -1,6 +1,9 @@
 
 #include "websockets.h"
 
+#include <chrono>
+#include <thread>
+
 namespace websockets {
 
 	option options[] = {
@@ -11,7 +14,7 @@ namespace websockets {
 		{ NULL, 0, 0, 0 }
 	};
 	
-	int default_main(int argc, char **argv, libwebsocket_protocols* protocols){
+	int default_main(int argc, char **argv, libwebsocket_protocols* protocols, std::function<void()> runloop_callback){
 		int port = 7681;
 		int use_ssl = 0;
 		char interface_name[128] = "";
@@ -63,9 +66,21 @@ namespace websockets {
 			static bool force_exit = false;
 			signal(SIGINT, [](int){ force_exit = true; });
 
+
+			using clock = std::chrono::steady_clock;
+			using duration = std::chrono::duration<double>;
 			while (!force_exit) {
+				auto begin = clock::now();
 				auto ret = libwebsocket_service(context.get_raw(), 10);
 				if(ret < 0) break;
+
+				if(runloop_callback) runloop_callback();
+
+				auto end = clock::now();
+				duration dur = (end - begin);
+				dur = duration(1.0/60.0) - dur;
+
+				std::this_thread::sleep_for(dur);
 			}
 		}
 
diff --git a/src/websockets.h b/src/websockets.h
index 247eb55..95c9da9 100644
--- a/src/websockets.h
+++ b/src/websockets.h
@@ -88,6 +88,15 @@ namespace websockets {
 		};
 	};
 
+	struct basic_websocket_info{
+		libwebsocket_context* context{nullptr};
+		libwebsocket* wsi{nullptr};
+		basic_websocket_info(libwebsocket_context* context, libwebsocket* wsi)
+		: context(context)
+		, wsi(wsi)
+		{}
+	};
+
 	// 4-function Protocol, provide functions to handle establishment, closing, receiving and writing (follows receiving)
 	// To let the callback return something non-zero (in case of error), use websockets::runtime_error
 	// Only types with no-arg ctor are allowed (uses placement new, because libwebsockets allocates for us)
@@ -95,10 +104,10 @@ namespace websockets {
 	struct TestProtocol {
 		typedef T user_type;
 
-		std::function<void(user_type&)> establish_func;
-		std::function<void(user_type&)> close_func;
-		std::function<std::string(user_type&)> write_func;
-		std::function<void(user_type&, std::string)> receive_func;
+		std::function<void(user_type&, basic_websocket_info)> establish_func;
+		std::function<void(user_type&, basic_websocket_info)> close_func;
+		std::function<std::string(user_type&, basic_websocket_info)> write_func;
+		std::function<void(user_type&, std::string, basic_websocket_info)> receive_func;
 
 		bool verbose{false};
 
@@ -111,20 +120,21 @@ namespace websockets {
 
 		int callback(libwebsocket_context* context, libwebsocket* wsi, libwebsocket_callback_reasons reason, void* user_ptr, void *in, size_t len){
 			user_type& user = *static_cast<user_type*>(user_ptr);
+			basic_websocket_info binfo{context, wsi};
 			try{
 				switch (reason) {
 					case LWS_CALLBACK_ESTABLISHED:
 						lwsl_notice("Connection established (%p, %p)\n", this, user_ptr);
 						new (user_ptr) user_type();
-						establish_func(user);
+						establish_func(user, binfo);
 						break;
 					case LWS_CALLBACK_CLOSED:
 						lwsl_notice("Connection closed (%p, %p)\n", this, user_ptr);
 						user.~user_type();
-						close_func(user);
+						close_func(user, binfo);
 						break;
 					case LWS_CALLBACK_SERVER_WRITEABLE:{
-						std::string string_to_send = write_func(user);
+						std::string string_to_send = write_func(user, binfo);
 						if(verbose) std::cout << string_to_send << std::endl;
 						// we need the extra bytes padding on both sides :(
 						unsigned char * buf = new unsigned char [LWS_SEND_BUFFER_PRE_PADDING + string_to_send.size() + LWS_SEND_BUFFER_POST_PADDING];
@@ -135,7 +145,7 @@ namespace websockets {
 						break;
 					}
 					case LWS_CALLBACK_RECEIVE:
-						receive_func(user, std::string((char*)in, len));
+						receive_func(user, std::string((char*)in, len), binfo);
 						libwebsocket_callback_on_writable(context, wsi);
 						break;
 					default:
@@ -158,6 +168,6 @@ namespace websockets {
 #define WSstandard_protocol(name, protocol)\
 { name, WSprotocol_callback(protocol), sizeof(decltype(protocol)::user_type) }
 
-	int default_main(int argc, char **argv, libwebsocket_protocols* protocols);
+	int default_main(int argc, char **argv, libwebsocket_protocols* protocols, std::function<void()> runloop_callback = nullptr);
 
 } // namespace websockets