From 2225151f72020928b8fd4073475ef8b3da7de371 Mon Sep 17 00:00:00 2001
From: Persson-dev <sim16.prib@gmail.com>
Date: Thu, 1 Jan 2026 22:17:01 +0100
Subject: [PATCH] add debug fastforward

---
 src/server/state/GameState.cpp           | 4 ++--
 src/td/display/state/DebugWorldState.cpp | 8 +++++++-
 src/td/simulation/ClientSimulation.cpp   | 4 ++--
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/server/state/GameState.cpp b/src/server/state/GameState.cpp
index d46aba0..b702593 100644
--- a/src/server/state/GameState.cpp
+++ b/src/server/state/GameState.cpp
@@ -25,8 +25,8 @@ void GameState::Update(float a_Delta) {
 	// TODO: don't make STEP_TIME constant
 	static const float stepTimeSecond = static_cast<float>(STEP_TIME) / 1000.0f;
 	m_Time += a_Delta;
-	if (m_Time > stepTimeSecond) {
-		m_Time = std::fmod(m_Time, stepTimeSecond);
+	while (m_Time > stepTimeSecond) {
+		m_Time -= stepTimeSecond;
 		auto lockStepPacket = m_Simulation.Update();
 		BroadcastPacket(lockStepPacket);
 	}
diff --git a/src/td/display/state/DebugWorldState.cpp b/src/td/display/state/DebugWorldState.cpp
index 7baab80..162ee6f 100644
--- a/src/td/display/state/DebugWorldState.cpp
+++ b/src/td/display/state/DebugWorldState.cpp
@@ -52,7 +52,7 @@ DebugWorldState::DebugWorldState(Display& a_Display) : DisplayState(a_Display) {
 			});
 
 			list.OnPlayerKick.Connect([this](PlayerID a_Player) {
-				auto it = std::find_if(m_FakeClients.begin(), m_FakeClients.end(), [a_Player](auto& clientPtr){
+				auto it = std::find_if(m_FakeClients.begin(), m_FakeClients.end(), [a_Player](auto& clientPtr) {
 					if (!clientPtr->GetId().has_value())
 						return false;
 					return clientPtr->GetId().value() == a_Player;
@@ -85,6 +85,7 @@ void DebugWorldState::OnAspectRatioChange(float a_Ratio) {
 
 void DebugWorldState::OnKeyDown(SDL_Keycode a_Key) {
 	// temporary tests
+	constexpr int SECONDS = 10;
 	switch (a_Key) {
 		case SDLK_A:
 			m_Client->SendPacket(td::protocol::packets::SpawnTroopPacket(td::EntityType::Zombie, 1));
@@ -94,6 +95,11 @@ void DebugWorldState::OnKeyDown(SDL_Keycode a_Key) {
 			m_Client->SendPacket(td::protocol::packets::PlaceTowerPacket(td::TowerType::Archer, td::TowerCoords(77, 13)));
 			break;
 
+		case SDLK_F:
+			m_Server->Update(SECONDS);
+			m_Client->Update(SECONDS);
+			break;
+
 		default:
 			break;
 	}
diff --git a/src/td/simulation/ClientSimulation.cpp b/src/td/simulation/ClientSimulation.cpp
index dfb69c6..d3bcbe7 100644
--- a/src/td/simulation/ClientSimulation.cpp
+++ b/src/td/simulation/ClientSimulation.cpp
@@ -51,8 +51,8 @@ float ClientSimulation::Update(float a_Delta) {
 	// TODO: handle freezes (m_CurrentTime > 2 * m_StepTime)
 	static const float stepTimeSecond = static_cast<float>(m_StepTime) / 1000.0f;
 	m_CurrentTime += a_Delta;
-	if (m_CurrentTime > stepTimeSecond) {
-		m_CurrentTime = std::fmod(m_CurrentTime, stepTimeSecond);
+	while (m_CurrentTime > stepTimeSecond) {
+		m_CurrentTime -= stepTimeSecond;
 		Step();
 	}
 	return (float)m_CurrentTime / stepTimeSecond;