add StateMachine

src/main.cpp

@@ -1,6 +1,7 @@
+#include <chrono>
+#include <fstream>
 #include <iostream>
 
-#include <fstream>
 #include <td/game/World.h>
 #include <td/input/Display.h>
 #include <td/protocol/packet/PacketSerialize.h>
@@ -102,6 +103,14 @@ void FastForward(td::game::World& a_World, const td::sim::GameHistory& a_LockSte
 	}
 }
 
+float GetDelta() {
+	static std::chrono::time_point<std::chrono::system_clock> m_LastTime = std::chrono::system_clock::now();
+	auto timeElapsed = std::chrono::system_clock::now() - m_LastTime;
+	float timeSeconds = std::chrono::duration<float, std::chrono::seconds::period>(timeElapsed).count();
+	m_LastTime = std::chrono::system_clock::now();
+	return timeSeconds;
+}
+
 int main(int argc, char** argv) {
 	td::game::WorldPtr serverWorld = GetWorld();
 
@@ -132,7 +141,7 @@ int main(int argc, char** argv) {
 
 	td::sim::ClientSimulation simulation(*clientWorld, td::STEP_TIME);
 	ClientHandler clientHandler(simulation);
-	
+
 	// packets from the server to the client
 	clientFakeSocket->OnReceive.Connect([&clientHandler](const td::protocol::PacketBase& a_Packet) {
 		a_Packet.Dispatch(clientHandler);
@@ -151,14 +160,15 @@ int main(int argc, char** argv) {
 		}
 	});
 
-	server.UpdateState(std::make_shared<td::server::GameState>(serverWorld));
-	client.UpdateState(std::make_shared<td::client::GameState>(clientWorld));
+	server.ChangeState<td::server::GameState>(serverWorld);
+	client.ChangeState<td::client::GameState>(clientWorld);
 
 	while (!display.IsCloseRequested()) {
 		display.PollEvents();
-		server.Update();
-		client.Update();
-		float lerp = simulation.Update();
+		float delta = GetDelta();
+		server.Update(delta);
+		client.Update(delta);
+		float lerp = simulation.Update(delta);
 		renderer.Render(lerp);
 		display.Update();
 	}