add basic timer

include/client/state/GameState.h

@@ -12,6 +12,7 @@ class GameState : public ClientState {
 	game::WorldPtr m_World;
 	sim::ClientSimulation m_Simulation;
 	float m_CurrentLerp;
+	float m_ElapsedTime;
 
   public:
 	GameState(Client& a_Client, const game::WorldPtr& a_World, std::uint64_t a_StepTime, const std::vector<protocol::LockStep> a_FirstSteps);
@@ -23,6 +24,10 @@ class GameState : public ClientState {
 		return m_CurrentLerp;
 	}
 
+	float GetElapsedTime() const {
+		return m_ElapsedTime;
+	}
+
 	game::WorldPtr GetWorld() const {
 		return m_World;
 	}

include/td/Maths.h

@@ -183,6 +183,51 @@ T Lerp(T v0, T v1, T t) {
 
 }  // namespace maths
 
+template<typename T>
+Vec2<T> operator+(const Vec2<T>& vect, const Vec2<T>& other) {
+	return {vect.x + other.x, vect.y + other.y};
+}
+
+template<typename T>
+Vec2<T> operator- (const Vec2<T>& vect) {
+	return { -vect.x, -vect.y };
+}
+
+template<typename T>
+Vec2<T> operator- (const Vec2<T>& vect, const Vec2<T>& other) {
+	return vect + (-other);
+}
+
+template<typename T>
+Vec3<T> operator- (const Vec3<T>& vect) {
+	return { -vect.x, -vect.y, -vect.z };
+}
+
+template<typename T>
+Vec3<T> operator+ (const Vec3<T>& vect, const Vec3<T>& other) {
+	return { vect.x + other.x, vect.y + other.y, vect.z + other.z };
+}
+
+template<typename T>
+Vec3<T> operator- (const Vec3<T>& vect, const Vec3<T>& other) {
+	return vect + (-other);
+}
+
+template<typename T>
+Vec4<T> operator- (const Vec4<T>& vect) {
+	return { -vect.x, -vect.y, -vect.z, -vect.w };
+}
+
+template<typename T>
+Vec4<T> operator+ (const Vec4<T>& vect, const Vec4<T>& other) {
+	return { vect.x + other.x, vect.y + other.y, vect.z + other.z, vect.w + other.w };
+}
+
+template<typename T>
+Vec4<T> operator- (const Vec4<T>& vect, const Vec4<T>& other) {
+	return vect + (-other);
+}
+
 template <typename T>
 sp::DataBuffer& operator<<(sp::DataBuffer& a_Buffer, const Vec2<T>& a_Vec) {
 	return a_Buffer << a_Vec.x << a_Vec.y;

include/td/render/Camera.h

@@ -35,6 +35,7 @@ class Camera {
 	void UpdatePerspective(float a_AspectRatio);
 
 	void SetCamPos(const Vec3f& a_NewPos);
+	const Vec3f& GetCamPos() const;
 };
 
 }  // namespace render

include/td/render/renderer/ImHotkey.h

@@ -1,357 +0,0 @@
-// ImHotKey v1.0
-// https://github.com/CedricGuillemet/ImHotKey
-//
-// The MIT License(MIT)
-// 
-// Copyright(c) 2019 Cedric Guillemet
-// 
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files(the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions :
-// 
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-// 
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-#pragma once
-
-#define SDL_h_
-
-/*
-How to use it?
-
-// Get some hotkeys composed of:
-// - hotkey name
-// - hotkey comment/lib
-// - hotkey scancodes. Computed by the editor. Store that value in your app.
-
-static std::vector<ImHotKey::HotKey> hotkeys = { { "Layout", "Reorder nodes in a simpler layout", 0xFFFF261D}
-        ,{"Save", "Save the current graph", 0xFFFF1F1D}
-        ,{"Load", "Load an existing graph file", 0xFFFF181D}
-        ,{"Play/Stop", "Play or stop the animation from the current graph", 0xFFFFFF3F}
-        ,{"SetKey", "Make a new animation key with the current parameters values at the current time", 0xFFFFFF1F}
-        };
-
-// The editor is a modal window. bring it with something like that
- if (ImGui::Button("Edit Hotkeys"))
-{
-    ImGui::OpenPopup("HotKeys Editor");
-}
-ImHotKey::Edit(hotkeys.data(), hotkeys.size(), "HotKeys Editor");
-
-// ImHotKey also provides a way to retrieve HotKey
-int hotkey = ImHotKey::GetHotKey(hotkeys.data(), hotkeys.size());
-if (hotkey != -1)
-{
-    // handle the hotkey index!
-}
-
-Awesome, you are done!
-To help you integrate in your app, you can get a text (like "Ctrl + O") to integrate in your menu
-static void GetHotKeyLib(unsigned int functionKeys, char* buffer, size_t bufferSize);
-
-*/
-
-#include "imgui.h"
-#include "imgui_internal.h"
-
-namespace ImHotKey
-{
-    struct HotKey
-    {
-        const char *functionName;
-        const char *functionLib;
-        unsigned int functionKeys;
-    };
-
-    struct Key
-    {
-        const char* lib = nullptr;
-        unsigned int order;
-        unsigned int scanCodePage1 = 0; // win32 scancode
-        unsigned int scanCodePage7 = 0; // HID (SDL,...)
-        float offset = 0;
-        float width = 40;
-    };
-
-    static const Key Keys[6][18] = {
-        { {"Esc", 4, 0x1, 0x29, 18}, {"F1", 5, 0x3B, 0x3A, 18}, {"F2", 6, 0x3C, 0x3B}, {"F3", 7, 0x3D, 0x3C}, {"F4", 8, 0x3E, 0x3D}, {"F5", 9, 0x3F, 0x3E, 24}, {"F6", 10, 0x40, 0x3F}, {"F7", 11, 0x41, 0x40}, {"F8", 12, 0x42, 0x41}, {"F9", 13, 0x43, 0x42, 24}, {"F10", 14, 0x44, 0x43}, {"F11", 15, 0x57, 0x44}, {"F12", 16, 0x58, 0x45}, {"PrSn", 17, 0x37, 0x46, 24}, {"ScLk", 18, 0x46}, {"Brk", 19, 126, 0x47} },
-        { {"~", 20, 0x29, 0x35}, {"1", 21, 0x2, 0x1E}, {"2", 22, 0x3, 0x1F}, {"3", 23, 0x4, 0x20}, {"4", 24, 0x5, 0x21}, {"5", 25, 0x6, 0x22}, {"6", 26, 0x7, 0x23}, {"7", 27, 0x8, 0x24}, {"8", 28, 0x9, 0x25}, {"9", 29, 0xA, 0x26}, {"0", 30, 0xB, 0x27}, {"-", 31, 0xC, 0x2D}, {"+", 32, 0xD, 0x2E},{"Backspace", 33, 0xE, 0x2A, 0, 80}, {"Ins", 34, 0x52, 0x49, 24}, {"Hom", 35, 0x47, 0x4A}, {"PgU", 36, 0x49, 0x4B} },
-        { {"Tab", 3, 0xF, 0x2B, 0, 60}, {"Q", 37, 0x10, 0x14}, {"W", 38, 0x11, 0x1A}, {"E", 39, 0x12, 0x08}, {"R", 40, 0x13, 0x15}, {"T", 41, 0x14, 0x17}, {"Y", 42, 0x15, 0x1C}, {"U", 43, 0x16, 0x18}, {"I", 44, 0x17, 0x0C}, {"O", 45, 0x18, 0x12}, {"P", 46, 0x19, 0x13}, {"[", 47, 0x1A, 0x2F}, {"]", 48, 0x1B, 0x30}, {"|", 49, 0x2B, 0x31, 0, 60}, {"Del", 50, 0x53, 0x4C, 24}, {"End", 51, 0x4F, 0x4D}, {"PgD", 52, 0x51, 0x4E} },
-        { {"Caps Lock", 53, 0x3A, 0x39, 0, 80}, {"A", 54, 0x1E, 0x04}, {"S", 55, 0x1F, 0x16}, {"D", 56, 0x20, 0x07}, {"F", 57, 0x21, 0x09}, {"G", 58, 0x22, 0x0A}, {"H", 59, 0x23, 0x0B}, {"J", 60, 0x24, 0x0D}, {"K", 61, 0x25, 0x0E}, {"L", 62, 0x26, 0x0F}, {";", 63, 0x27, 0x33}, {"'", 64, 0x28, 0x34}, {"Ret", 65, 0x1C, 0X28, 0, 84} },
-        { {"Shift", 2, 0x2A, 0xE1, 0, 104}, {"Z", 66, 0x2C, 0x1D}, {"X", 67, 0x2D, 0x1B}, {"C", 68, 0x2E, 0x06}, {"V", 69, 0x2F, 0x19}, {"B", 70, 0x30, 0x05}, {"N", 71, 0x31, 0x11}, {"M", 72, 0x32, 0x10}, {",", 73, 0x33, 0x36}, {".", 74, 0x34, 0x37}, {"/", 75, 0x35, 0x38}, {"Shift", 2, 0x2A, 0xE5, 0, 104}, {"Up", 76, 0x48, 0x52, 68} },
-        { {"Ctrl", 0, 0x1D, 0xE0, 0, 60}, {"Alt", 1, 0x38, 0xE2, 68, 60}, {"Space", 77, 0x39, 0X2c, 0, 260}, {"Alt", 1, 0x38, 0xE6, 0, 60}, {"Ctrl", 0, 0x1D, 0xE4, 68, 60}, {"Left", 78, 0x4B, 0x50, 24}, {"Down", 79, 0x50, 0x51}, {"Right", 80, 0x4D, 0x52} }
-    };
-
-    static const Key& GetKeyForScanCode(unsigned int scancode)
-    {
-        for (unsigned int y = 0; y < 6; y++)
-        {
-            int x = 0;
-            while (Keys[y][x].lib)
-            {
-#ifdef SDL_h_
-                if (Keys[y][x].scanCodePage7 == scancode)
-#elif WIN32
-                if (Keys[y][x].scanCodePage1 == scancode)
-#else
-#error
-#endif
-                    return Keys[y][x];
-                x++;
-            }
-        }
-        return Keys[0][0];
-    }
-
-    static unsigned int GetOrderedScanCodes(unsigned char scanCodes[4], unsigned char order[4])
-    {
-        for (int pass = 0; pass < 2; pass++)
-        {
-            for (int o = 0; o < 3; o++)
-            {
-                if (order[o] > order[o + 1])
-                {
-                    ImSwap(order[o], order[o + 1]); ImSwap(scanCodes[o], scanCodes[o + 1]);
-                }
-            }
-        }
-        return (scanCodes[3] << 24) + (scanCodes[2] << 16) + (scanCodes[1] << 8) + scanCodes[0];
-    }
-
-    static void HotKeySPrintf(char* buffer, size_t bufferSize, const char* fmt, ...)
-    {
-        va_list args;
-        va_start(args, fmt);
-        ImFormatStringV(buffer, bufferSize, fmt, args);
-        va_end(args);
-    }
-
-    static void GetHotKeyLib(unsigned int functionKeys, char* buffer, size_t bufferSize, const char *functionLib = nullptr)
-    {
-        static const char* str[4] = { "%s", "%s + %s", "%s + %s +%s", "%s + %s + %s + %s" };
-        static const char* strLib[4] = { "%s (%s)", "%s (%s + %s)", "%s (%s + %s +%s)", "%s (%s + %s + %s + %s)" };
-        static const char* lib[4];
-        int scanCodeCount = 0;
-        for (int i = 0; i < 4; i++)
-        {
-            unsigned char scanCode = (unsigned char)(functionKeys >> i * 8);
-            if (scanCode == 0xFF)
-            {
-                continue;
-            }
-            lib[scanCodeCount] = GetKeyForScanCode(scanCode).lib;
-            scanCodeCount++;
-        }
-        if (!scanCodeCount)
-        {
-            buffer[0] = 0;
-            return;
-        }
-        
-        if (functionLib)
-        {
-            const char* fmt = strLib[scanCodeCount - 1];
-            HotKeySPrintf(buffer, bufferSize, fmt, functionLib, lib[0], lib[1], lib[2], lib[3]);
-        }
-        else
-        {
-            const char* fmt = str[scanCodeCount - 1];
-            HotKeySPrintf(buffer, bufferSize, fmt, lib[0], lib[1], lib[2], lib[3]);
-        }
-    }
-
-    static void Edit(HotKey *hotkey, size_t hotkeyCount, const char *popupModal)
-    {
-        static int editingHotkey = -1;
-        if (!hotkeyCount)
-            return;
-        static bool keyDown[512] = {};
-
-        ImGui::SetNextWindowSize(ImVec2(1060, 400));
-        if (!ImGui::BeginPopupModal(popupModal, NULL, ImGuiWindowFlags_NoResize))
-            return;
-
-        ImGui::BeginChildFrame(127, ImVec2(220, -1));
-        for(size_t i = 0;i< hotkeyCount;i++)
-        {
-            char hotKeyLib[128];
-            GetHotKeyLib(hotkey[i].functionKeys, hotKeyLib, sizeof(hotKeyLib), hotkey[i].functionName);
-            if (ImGui::Selectable(hotKeyLib, editingHotkey == int(i)) || editingHotkey == -1)
-            {
-                editingHotkey = int(i);
-                memset(keyDown, 0, sizeof(keyDown));
-                for (int j = 0; j < 4; j++)
-                {
-                    int scan = (hotkey[editingHotkey].functionKeys >> (8 * j)) & 0xFF;
-                    if (scan != 0xFF)
-                    {
-                        keyDown[scan] = true;
-                    }
-                }
-            }
-        }
-        ImGui::EndChildFrame();
-        ImGui::SameLine();
-        ImGui::BeginGroup();
-
-        for (int i = ImGuiKey_NamedKey_BEGIN; i < ImGuiKey_NamedKey_END; i++)
-        {
-            if (ImGui::IsKeyPressed(ImGuiKey(i), false))
-            {
-                int imKey;
-#ifdef SDL_h_
-                imKey = i;
-#elif WIN32
-                imKey = MapVirtualKeyA(i, MAPVK_VK_TO_VSC);
-#else
-                imKey = i;
-#endif
-                keyDown[imKey - ImGuiKey_NamedKey_BEGIN] = !keyDown[imKey - ImGuiKey_NamedKey_BEGIN];
-            }
-        }
-        for (unsigned int y = 0; y < 6; y++)
-        {
-            int x = 0;
-            ImGui::BeginGroup();
-            while (Keys[y][x].lib)
-            {
-                const Key& key = Keys[y][x];
-                const float ofs = key.offset + (x?4.f:0.f);
-
-                const float width = key.width;
-                if (x)
-                {
-                    ImGui::SameLine(0.f, ofs);
-                }
-                else
-                {
-                    if (ofs >= 1.f)
-                    {
-                        ImGui::Indent(ofs);
-                    }
-                }
-#ifdef SDL_h_
-                bool& butSwtch = keyDown[key.scanCodePage7];
-#elif WIN32
-                bool& butSwtch = keyDown[key.scanCodePage1];
-#else
-#error
-#endif
-                ImGui::PushStyleColor(ImGuiCol_Button, butSwtch ? 0xFF1040FF : 0x80000000);
-                if (ImGui::Button(Keys[y][x].lib, ImVec2(width, 40)))
-                {
-                    butSwtch = !butSwtch;
-                }
-                ImGui::PopStyleColor();
-                x++;
-            }
-            ImGui::EndGroup();
-        }
-        ImGui::InvisibleButton("space", ImVec2(10, 55));
-        ImGui::BeginChildFrame(18, ImVec2(540, 40));
-        ImGui::Text("%s :", hotkey[editingHotkey].functionName);
-        ImGui::SameLine();
-        ImGui::TextWrapped("%s", hotkey[editingHotkey].functionLib);
-        ImGui::EndChildFrame();
-        ImGui::SameLine();
-        int keyDownCount = 0;
-        for (auto d : keyDown)
-        {
-            keyDownCount += d ? 1 : 0;
-        }
-        if (ImGui::Button("Clear", ImVec2(80, 40)))
-        {
-            memset(keyDown, 0, sizeof(keyDown));
-        }
-        ImGui::SameLine();
-        if (keyDownCount && keyDownCount < 5)
-        {
-            if (ImGui::Button("Set", ImVec2(80, 40)))
-            {
-                unsigned char scanCodes[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
-                unsigned char order[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
-                int scanCodeCount = 0;
-                hotkey[editingHotkey].functionKeys = 0;
-                for (int i = 1; i < sizeof(keyDown); i++)
-                {
-                    if (keyDown[i])
-                    {
-                        scanCodes[scanCodeCount] = (unsigned char)i;
-                        order[scanCodeCount] = (unsigned char)GetKeyForScanCode(i).order;
-                        scanCodeCount++;
-                    }
-                }
-
-                hotkey[editingHotkey].functionKeys = GetOrderedScanCodes(scanCodes, order);
-            }
-            ImGui::SameLine(0.f, 20.f);
-        }
-        else
-        {
-            ImGui::SameLine(0.f, 100.f);
-        }
-        
-        if (ImGui::Button("Done", ImVec2(80, 40))) { ImGui::CloseCurrentPopup(); }
-        ImGui::EndGroup();
-        ImGui::EndPopup();
-    }
-
-    static int GetHotKey(HotKey *hotkey, size_t hotkeyCount)
-    {
-        static unsigned int lastHotKey = 0xFFFFFFFF;
-        unsigned char scanCodes[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
-        unsigned char order[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
-        int scanCodeCount = 0;
-        for (int i = ImGuiKey_Aliases_BEGIN; i < ImGuiKey_Aliases_END; i++)
-        {
-            if (ImGui::IsKeyDown(ImGuiKey(i)))
-            {
-                int imKey;
-#ifdef SDL_h_
-                imKey = i - ImGuiKey_NamedKey_BEGIN;
-#elif WIN32
-                imKey = MapVirtualKeyA(i, MAPVK_VK_TO_VSC);
-#else
-                imKey = i;
-#endif
-                scanCodes[scanCodeCount] = (unsigned char)imKey;
-                order[scanCodeCount] = (unsigned char)GetKeyForScanCode(imKey).order;
-                scanCodeCount++;
-                if (scanCodeCount == 4)
-                    break;
-            }
-        }
-
-        unsigned int newHotKey = GetOrderedScanCodes(scanCodes, order);
-
-        if (scanCodeCount)
-        {
-            if (newHotKey != lastHotKey)
-            {
-                for (size_t i = 0; i < hotkeyCount; i++)
-                {
-                    if (hotkey[i].functionKeys == newHotKey)
-                    {
-                        lastHotKey = newHotKey;
-                        return int(i);
-                    }
-                }
-                lastHotKey = 0xFFFFFFFF;
-            }
-            return -1;
-        }
-        lastHotKey = 0xFFFFFFFF;
-        return -1;
-    }
-};

include/td/render/renderer/TimerRenderer.h

@@ -1,20 +1,20 @@
 #pragma once
 
+#include "client/state/GameState.h"
 #include <td/render/Renderer.h>
 #include <client/PlayerManager.h>
 
 namespace td {
 namespace render {
 
-/**
- * \brief This is a debug class
- */
-class HotkeysRenderer : public BasicRenderer {
+class TimerRenderer : public BasicRenderer {
+  private:
+	const client::GameState& m_State;
   public:
 	virtual void Render(float a_Lerp) override;
 
-	HotkeysRenderer();
-	~HotkeysRenderer() {}
+	TimerRenderer(const client::GameState& a_State);
+	~TimerRenderer() {}
 };
 
 }  // namespace render

include/td/render/renderer/WorldRenderer.h

@@ -17,6 +17,9 @@ class WorldRenderer : public Renderer<shader::WorldShader> {
 	virtual ~WorldRenderer();
 
 	virtual void Render(float a_Lerp) override;
+
+  private:
+	void UpdateControls();
 };
 
 }  // namespace render

src/client/state/GameState.cpp

@@ -20,6 +20,7 @@ void GameState::Handle(const protocol::packets::LockStepResponsePacket& a_LockSt
 
 void GameState::Update(float a_Delta) {
 	m_CurrentLerp = m_Simulation.Update(a_Delta);
+	m_ElapsedTime += a_Delta;
 }
 
 }  // namespace client

src/main.cpp

@@ -1,12 +1,12 @@
 #include <chrono>
-#include <td/display/state/DebugWorldState.h>
+#include <td/display/state/MainMenuState.h>
 #include <td/misc/Time.h>
 
 int main(int argc, char** argv) {
 	// init GL context
 	td::Display display(1920, 1080, "Tower-Defense 2");
 
-	display.ChangeState<td::DebugWorldState>();
+	display.ChangeState<td::MainMenuState>();
 
 	td::Timer timer;
 	while (!display.IsCloseRequested()) {

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);
 	}

src/td/display/state/DebugWorldState.cpp

@@ -6,8 +6,8 @@
 #include <td/game/World.h>
 #include <td/protocol/packet/Packets.h>
 #include <td/render/renderer/EntityRenderer.h>
-#include <td/render/renderer/HotkeysRenderer.h>
 #include <td/render/renderer/PlayerListRenderer.h>
+#include <td/render/renderer/TimerRenderer.h>
 #include <td/render/renderer/TowerRenderer.h>
 #include <td/render/renderer/WorldRenderer.h>
 
@@ -23,8 +23,6 @@
 #include <td/display/Display.h>
 #include <td/display/state/DebugWorldState.h>
 
-#include <imgui.h>
-
 namespace td {
 
 DebugWorldState::DebugWorldState(Display& a_Display) : DisplayState(a_Display) {
@@ -44,7 +42,7 @@ DebugWorldState::DebugWorldState(Display& a_Display) : DisplayState(a_Display) {
 			m_Renderer.AddRenderer<render::WorldRenderer>(m_Camera, clientWorld);
 			m_Renderer.AddRenderer<render::EntityRenderer>(m_Camera, clientWorld);
 			m_Renderer.AddRenderer<render::TowerRenderer>(m_Camera, clientWorld);
-			m_Renderer.AddRenderer<render::HotkeysRenderer>();
+			m_Renderer.AddRenderer<render::TimerRenderer>(*gameState);
 
 			auto& list = m_Renderer.AddRenderer<render::PlayerListRenderer>(m_Client->GetPlayers());
 
@@ -89,6 +87,7 @@ 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));
@@ -98,6 +97,11 @@ 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;
 	}

src/td/game/World.cpp

@@ -1,7 +1,10 @@
+#include <cassert>
+#include <td/Maths.h>
 #include <td/game/World.h>
+#include <td/game/WorldTypes.h>
 
-#include <td/simulation/WorldTicker.h>
 #include <td/protocol/packet/PacketSerialize.h>
+#include <td/simulation/WorldTicker.h>
 
 namespace td {
 namespace game {
@@ -89,5 +92,14 @@ void World::ResetSnapshots(std::shared_ptr<sim::WorldSnapshot>& a_Current, std::
 	m_NextState = a_Next;
 }
 
+TilePtr World::GetTile(std::int32_t x, std::int32_t y) const {
+	ChunkCoord coords{static_cast<std::int16_t>(x / Chunk::ChunkWidth), static_cast<std::int16_t>(y / Chunk::ChunkHeight)};
+	auto it = m_Chunks.find(coords);
+	assert(it != m_Chunks.end());
+	auto chunk = it->second;
+	Vec2i inchunkCoords{x % Chunk::ChunkWidth, y % Chunk::ChunkHeight};
+	return GetTilePtr(chunk->GetTileIndex(inchunkCoords.y * Chunk::ChunkWidth + inchunkCoords.x));
+}
+
 }  // namespace game
 }  // namespace td

src/td/render/Camera.cpp

@@ -1,3 +1,4 @@
+#include "td/Maths.h"
 #include <td/render/Camera.h>
 
 #include <cmath>
@@ -24,5 +25,9 @@ void Camera::SetCamPos(const Vec3f& a_NewPos) {
 	OnViewChange();
 }
 
+const Vec3f& Camera::GetCamPos() const {
+	return m_CamPos;
+}
+
 }  // namespace render
 }  // namespace td

src/td/render/renderer/EntityRenderer.cpp

@@ -22,7 +22,7 @@ void EntityRenderer::Render(float a_Lerp) {
 		float x = Lerp<game::Mob>(*mob, a_Lerp, [](const game::Mob& a_Mob) { return static_cast<float>(a_Mob.m_Position.x); });
 		float z = Lerp<game::Mob>(*mob, a_Lerp, [](const game::Mob& a_Mob) { return static_cast<float>(a_Mob.m_Position.y); });
 
-		m_Shader->SetModelPos({x, 1, z});
+		m_Shader->SetModelPos({x, .001, z});
 		Renderer::Render(*m_EntityVao);
 	}
 }

src/td/render/renderer/HotkeysRenderer.cpp

@@ -1,36 +0,0 @@
-#include <imgui_internal.h>
-#include <td/render/renderer/HotkeysRenderer.h>
-
-#include <imgui.h>
-#include <optional>
-
-#include <td/render/renderer/ImHotkey.h>
-
-namespace td {
-namespace render {
-
-void HotkeysRenderer::Render(float a_Lerp) {
-	ImGui::Begin("Hotkeys");
-	static std::vector<ImHotKey::HotKey> hotkeys = {{"Layout", "Reorder nodes in a simpler layout", 0xFFFF261D},
-		{"Save", "Save the current graph", 0xFFFF1F1D}, {"Load", "Load an existing graph file", 0xFFFF181D},
-		{"Play/Stop", "Play or stop the animation from the current graph", 0xFFFFFF3F},
-		{"SetKey", "Make a new animation key with the current parameters values at the current time", 0xFFFFFF1F}};
-
-	// The editor is a modal window. bring it with something like that
-	if (ImGui::Button("Edit Hotkeys")) {
-		ImGui::OpenPopup("HotKeys Editor");
-	}
-	ImHotKey::Edit(hotkeys.data(), hotkeys.size(), "HotKeys Editor");
-
-	// ImHotKey also provides a way to retrieve HotKey
-	int hotkey = ImHotKey::GetHotKey(hotkeys.data(), hotkeys.size());
-	if (hotkey != -1) {
-		// handle the hotkey index!
-	}
-	ImGui::End();
-}
-
-HotkeysRenderer::HotkeysRenderer() {}
-
-}  // namespace render
-}  // namespace td

src/td/render/renderer/TimerRenderer.cpp

@@ -0,0 +1,18 @@
+#include <client/state/GameState.h>
+#include <td/render/renderer/TimerRenderer.h>
+
+#include <imgui.h>
+
+namespace td {
+namespace render {
+
+void TimerRenderer::Render(float a_Lerp) {
+	ImGui::Begin("Timer");
+	ImGui::Text("Time : %02d:%02d", static_cast<int>(m_State.GetElapsedTime()) / 60, static_cast<int>(m_State.GetElapsedTime()) % 60);
+	ImGui::End();
+}
+
+TimerRenderer::TimerRenderer(const client::GameState& a_State) : m_State(a_State) {}
+
+}  // namespace render
+}  // namespace td

src/td/render/renderer/TowerRenderer.cpp

@@ -18,7 +18,7 @@ TowerRenderer::~TowerRenderer() {}
 void TowerRenderer::Render(float a_Lerp) {
 	m_Shader->Start();
 	for (const auto& tower : m_World->GetTowers()) {
-		m_Shader->SetModelPos({tower->GetCenterX(), 1, tower->GetCenterY()});
+		m_Shader->SetModelPos({tower->GetCenterX(), .001, tower->GetCenterY()});
 		Renderer::Render(*m_EntityVao);
 	}
 }

src/td/render/renderer/WorldRenderer.cpp

@@ -1,3 +1,4 @@
+#include <td/Maths.h>
 #include <td/render/renderer/WorldRenderer.h>
 
 #include <td/render/loader/WorldLoader.h>
@@ -13,7 +14,17 @@ WorldRenderer::WorldRenderer(Camera& a_Camera, const game::WorldPtr& a_World) :
 
 WorldRenderer::~WorldRenderer() {}
 
+void WorldRenderer::UpdateControls() {
+	if (ImGui::IsMouseDown(ImGuiMouseButton_Left)) {
+		constexpr float sensitivity = 1.0f;
+		float delta = ImGui::GetIO().DeltaTime;
+		auto mouseDelta = ImGui::GetIO().MouseDelta;
+		m_Camera.SetCamPos(m_Camera.GetCamPos() + Vec3f{-mouseDelta.x * delta * sensitivity, 0, -mouseDelta.y * delta * sensitivity});
+	}
+}
+
 void WorldRenderer::Render(float a_Lerp) {
+	UpdateControls();
 	m_Shader->Start();
 	Renderer::Render(*m_WorldVao);
 }

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;

src/td/simulation/CommandApply.cpp

@@ -1,3 +1,4 @@
+#include <td/Types.h>
 #include <td/simulation/CommandApply.h>
 
 namespace td {
@@ -24,6 +25,10 @@ void CommandApply::Handle(const protocol::commands::PlayerJoinCommand& a_PlayerJ
 void CommandApply::Handle(const protocol::commands::SpawnTroopCommand& a_SpawnTroop) {
 	auto zombie = std::make_shared<game::Zombie>();
 	zombie->m_Position = a_SpawnTroop->m_Position;
+
+	// TODO: make it spawn dependant
+	zombie->m_Direction = Direction::PositiveY;
+
 	m_Snapshot.m_Mobs.push_back(zombie);
 }
 

src/td/simulation/system/EntityMove.cpp

@@ -1,11 +1,61 @@
+#include <td/Maths.h>
+#include <td/Types.h>
+#include <td/game/WorldTypes.h>
 #include <td/simulation/system/EntityMove.h>
 
+#include <td/game/World.h>
+
 namespace td {
 namespace sim {
 
+static Vec2i GetUnitDirection(Direction a_Direction) {
+	switch (a_Direction) {
+		case Direction::PositiveX:
+			return {1, 0};
+		case Direction::NegativeX:
+			return {-1, 0};
+		case Direction::PositiveY:
+			return {0, 1};
+		case Direction::NegativeY:
+			return {0, -1};
+	}
+	return {0, 0};
+}
+
+class DirectionTileVisitor : public game::TileHandler {
+  private:
+	Direction m_Direction;
+
+  public:
+	DirectionTileVisitor() {}
+
+	virtual void Handle(const game::EmptyTile& a_Tile) override {}
+
+	virtual void Handle(const game::TowerTile& a_Tile) override {}
+
+	virtual void Handle(const game::DecorationTile& a_Tile) override {}
+
+	virtual void Handle(const game::WalkableTile& a_Tile) override {
+		m_Direction = a_Tile->m_Direction;
+	}
+
+	const Direction GetDirection() {
+		return m_Direction;
+	}
+};
+
 void EntityMove::Tick(const game::World& a_World, WorldSnapshot& a_State, FpFloat a_Delta) {
 	for (auto& mob : a_State.m_Mobs) {
-		mob->m_Position.x += a_Delta;
+		auto tile = a_World.GetTile(static_cast<std::int32_t>(mob->m_Position.x), static_cast<std::int32_t>(mob->m_Position.y));
+		Direction direction = mob->m_Direction;
+		if (tile) {
+			DirectionTileVisitor visitor;
+			tile->Dispatch(visitor);
+			direction = visitor.GetDirection();
+		}
+		auto directVector = GetUnitDirection(direction);
+		mob->m_Position.x += directVector.x * a_Delta;
+		mob->m_Position.y += directVector.y * a_Delta;
 	}
 }