Real main file added

Game loop shell implemented

.gitignore

@@ -37,6 +37,7 @@
 *.app
 
 # other
+*.log
 *.zip
 *.ini
 test_data/test_save.xml

CMakeLists.txt

@@ -4,7 +4,7 @@ cmake_minimum_required(VERSION 3.16.3)
 project(Lunarium VERSION 0.1.0)
 
 # specify the C++ standard
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # specify the opengl version
@@ -15,7 +15,7 @@ configure_file(LunariumConfig.h.in LunariumConfig.h)
 
 # Source Files
 set(LUNARIUM_SRC
-"src/test_main.cpp"
+"src/main.cpp"
 "src/core/core.cpp"
 "src/core/state.cpp"
 "src/core/Version.cpp"
@@ -26,6 +26,7 @@ set(LUNARIUM_SRC
 "src/utils/OpRes.cpp"
 "src/utils/Args.cpp"
 "src/utils/BinaryFileBuffer.cpp"
+"src/utils/FrameCounter.cpp"
 "src/graphics/window.cpp"
 "src/graphics/oglgraphics.cpp"
 "src/graphics/glShader.cpp"

docs/Tasks.todo

@@ -0,0 +1,11 @@
+
+Core:
+    ☐ Add log settings to the state file
+    
+
+Graphics:
+    ☐ Dear ImGui class with basic initialization
+    ☐ Decide on a font/text rendering system
+
+Input:
+    ☐ Port over the Element2D input system and adust it to use glfw

src/core/core.cpp

@@ -9,11 +9,15 @@
 #include "core.h"
 #include "Version.h"
 
+// Sub Systems
+#include <graphics/window.h>
+#include <graphics/OGLGraphics.h>
+
 namespace lunarium
 {
     Core* Core::mpInstance = nullptr;
     Core::Core()
-        : mbIsInit(false), mpArgs(nullptr)
+        : mbIsInit(false), mpArgs(nullptr), mpWindow(nullptr), mpGraphics(nullptr)
     {
     
     }
@@ -33,52 +37,103 @@ namespace lunarium
         if (!mpInstance)
             return;
 
+        
+        Logger::Log(LogCategory::CORE, LogLevel::INFO, "Lunarium is shutting down!");
+
         // Shutdown subsystems
+        delete mpInstance->mpGraphics;
+        mpInstance->mpGraphics = nullptr;
+
+        delete mpInstance->mpWindow;
+        mpInstance->mpWindow = nullptr;
 
         delete mpInstance->mpArgs;
         mpInstance->mpArgs = nullptr;
 
         delete mpInstance;
         mpInstance = nullptr;
+
+        mpInstance->mbIsInit = false;
     }
 
-    void Core::Initialize(int argc, char** argv, std::vector<LogListener*>& listeners)
+    void Core::Initialize(int argc, char** argv)
     {
-        // Setup the log system and add any listeners
-        mpLog = Logger::GetInstance();
-
-		mMasterLogFile.open("Element2D_Master.log", std::ios_base::app);
+        // Setup the log system
+		mMasterLogFile.open("Lunarium_Master.log", std::ios_base::app);
 		mMasterLogFile << "\n\n";
 
 
-		mErrorLogFile.open("Element2D_Errors.log", std::ios_base::app);
+		mErrorLogFile.open("Lunarium_Errors.log", std::ios_base::app);
 		mErrorLogFile << "\n\n";
 
 		if (mMasterLogFile.is_open())
-			mpLog->AddListener(new FileListener(mMasterLogFile));
+			Logger::GetInstance()->AddListener(new FileListener(mMasterLogFile));
 
 
 		if (mErrorLogFile.is_open())
-			mpLog->AddListener(new FileListener(mErrorLogFile, LogLevel::ERROR | LogLevel::FATAL_ERROR));
+			Logger::GetInstance()->AddListener(new FileListener(mErrorLogFile, LogLevel::ERROR | LogLevel::FATAL_ERROR));
         
-        for (unsigned i = 0; i < listeners.size(); i++)
-        {
-            mpLog->AddListener(listeners[i]);
-        }
-
         Logger::Log(LogCategory::CORE, LogLevel::INFO, "Running Lunarium version %s", Version::GetVersion().ToString().c_str());
 
         // Attempt to load the engine state file. This file should be placed in the same directory as the lunarium program.
-        mpLog->Log(LogCategory::CORE, LogLevel::INFO, "Attempting to load state file: lunarium_state.xml");
         if (Failed(State::CreateFromFile("lunarium_state.xml", mState)))
         {
             Logger::Log(LogCategory::CORE, LogLevel::WARNING, "Unable to load state file: lunarium_state.xml. Loading default state.");
             mState = State::CreateDefault();
         }
+        else
+        {
+            Logger::Log(LogCategory::CORE, LogLevel::INFO, "Loaded state file: lunarium_state.xml");
+        }
 
         // Parse command line args -- None right now
         std::vector<Args::SwitchDesc> sd;
         mpArgs = new Args(argc, argv, '-', sd);
+
+        OpRes result;
+
+        // Init Graphics/Window system
+        mpWindow = new Window;
+        result = mpWindow->Initialize(mState);
+        if (Failed(result))
+        {
+            Logger::Log(LogCategory::CORE, LogLevel::FATAL_ERROR, 
+                        "Could not initialize the Window system: %s", result.Description);
+            return;
+        }
+
+        if (Renderer::OPENGL == mState.Display.RenderFramework)
+        {
+            mpGraphics = new OglGraphics;
+        }
+        else if (Renderer::VULKAN == mState.Display.RenderFramework)
+        {
+            Logger::Log(LogCategory::CORE, LogLevel::FATAL_ERROR, 
+                        "Can not create Vulkan graphics system because it is not yet implemented. Must use OpenGL instead.");
+            return;
+        }
+        else
+        {
+            Logger::Log(LogCategory::CORE, LogLevel::FATAL_ERROR, 
+                        "Could not create graphics system: Unknown render framework specified.");
+            return;
+        }
+
+        // TODO: This should probably be based on a state setting instead
+#ifdef _DEBUG
+        result = mpGraphics->Initialize(mpWindow);
+#else   
+        result = mpGraphics->Initialize(mpWindow, false);
+#endif
+
+        if (Failed(result))
+        {
+            Logger::Log(LogCategory::CORE, LogLevel::FATAL_ERROR,
+                    "Could not initialized the graphics system: %s", result.Description);
+            return;
+        }
+
+        mbIsInit = true;
     }
 
     bool Core::IsInit() const
@@ -90,4 +145,36 @@ namespace lunarium
     {
         return mState;
     }
+
+    void Core::RunGameLoop()
+    {
+        mFrameCounter.Reset();
+
+        // TODO: Init frame counter
+        while (!mpWindow->ShouldWindowClose())
+        {
+            mFrameCounter.NewFrame();
+
+            // Display FPS in window title for now
+            std::string title = "Lunarium - FPS: ";
+            title += std::to_string(mFrameCounter.GetFrameData().CurrentFPS);
+            glfwSetWindowTitle(mpWindow->GetWindow(), title.c_str());
+
+            // Poll input
+            Window::PollEvents();
+
+            // HACK: Temporary solution to close the program
+            if (glfwGetKey(mpWindow->GetWindow(), GLFW_KEY_ESCAPE) == GLFW_PRESS)
+            {
+                mpWindow->SetShouldCloseFlag(true);
+            }
+
+            // Update game state
+
+            // Render
+            mpGraphics->BeginDraw();
+
+            mpGraphics->EndDraw();
+        }
+    }
 }

src/core/core.h

@@ -12,33 +12,44 @@
 #include "state.h"
 #include <utils/Logger.h>
 #include <utils/args.h>
+#include <utils/FrameCounter.h>
 
 namespace lunarium
 {
+    class IGraphics;
+    class Window;
+
     class Core
     {
     public:
         static Core& GetInstance();
         static void Shutdown();
 
-        void Initialize(int argc, char** argv, std::vector<LogListener*>& listeners);
+        void Initialize(int argc, char** argv);
 
         bool IsInit() const;
         const State& GetState() const;
 
         void ApplyState(State newState);
 
+        void RunGameLoop();
+
     private:    // DATA
         static Core* mpInstance;
         bool mbIsInit;
         State mState;
         Args* mpArgs;
-        Logger* mpLog;
+        FrameCounter mFrameCounter;
 
 		// Log Files
 		std::ofstream mMasterLogFile;
 		std::ofstream mErrorLogFile;
 
+    private: // SUBSYSTEMS
+
+    Window*     mpWindow;
+    IGraphics*  mpGraphics;
+
     private: // HIDDEN METHODS
 
         Core();

src/graphics/IGraphics.h

@@ -34,7 +34,7 @@ namespace lunarium
 
 		IGraphics() : mbIsInit(false) {}
 
-		virtual OpRes Initialized(Window* pWindow, bool enableDebugMessages = true) = 0;
+		virtual OpRes Initialize(Window* pWindow, bool enableDebugMessages = true) = 0;
 		virtual void Shutdown() = 0;
 
 		virtual void ResizeCanvas() = 0;

src/graphics/OGLGraphics.cpp

@@ -44,7 +44,7 @@ namespace lunarium
         
     }
 
-    OpRes OglGraphics::Initialized(Window* pWindow, bool enableDebugMessages)
+    OpRes OglGraphics::Initialize(Window* pWindow, bool enableDebugMessages)
     {
         if (!pWindow->IsInit())
         {

src/graphics/OGLGraphics.h

@@ -25,7 +25,7 @@ namespace lunarium
 
         OglGraphics();
 
-		virtual OpRes Initialized(Window* pWindow, bool enableDebugMessages = true);
+		virtual OpRes Initialize(Window* pWindow, bool enableDebugMessages = true);
 		virtual void Shutdown();
 
 		virtual void ResizeCanvas();

src/main.cpp

@@ -0,0 +1,44 @@
+/******************************************************************************
+*	File		-	main.cpp
+*	Author		-	Joey Pollack
+*	Date		-	2021/09/03 (y/m/d)
+*	Mod Date	-	2021/09/03 (y/m/d)
+*	Description	-	Main entry-point for Lunarium
+******************************************************************************/
+
+#include <core/core.h>
+#include <utils/logger.h>
+#include <utils/helpers.h>
+#include <iostream>
+#include <filesystem>
+
+int main(int argc, char** argv)
+{
+    // Switch the currrent working directory to the directory
+    // containing the lunarium.exe file because the data and state
+    // file should be in that location
+    std::string path = argv[0];
+    path = lunarium::String::TrimFileNameFromPath(path);
+    std::filesystem::current_path(path);
+
+    // All log messages will go to stdout
+    lunarium::Logger::GetInstance()->AddListener(new lunarium::StandardListener);
+
+    lunarium::Core& core = lunarium::Core::GetInstance();
+    core.Initialize(argc, argv);
+
+    if (!core.IsInit())
+    {
+        std::cout << "\nFailed to initialize the engine core.";
+        return 1;
+    }
+
+    std::cout << "\nEngine core successfully initialized!";
+
+    core.RunGameLoop();
+
+    core.Shutdown();
+    lunarium::Logger::GetInstance()->FreeAllListeners();
+    lunarium::Logger::FreeInstance();
+    return 0;
+}

src/utils/FrameCounter.cpp

@@ -0,0 +1,62 @@
+/******************************************************************************
+*	File		-	FrameCounter.cpp
+*	Author		-	Joey Pollack
+*	Date		-	2021/09/03 (y/m/d)
+*	Mod Date	-	2021/09/03 (y/m/d)
+*	Description	-	Tracks frame statistics
+******************************************************************************/
+
+#include "FrameCounter.h"
+
+namespace lunarium
+{
+    void FrameCounter::Reset(bool minimalTracking)
+    {
+        // Zero out the struct
+        memset(&mFrameData, 0, sizeof(FrameData));
+        mFrameData.LowestFPS = 10000;
+        mbMinimalTracking = minimalTracking;
+        mSecondTimer = 0.0;
+        mTimer.Reset();
+    }
+
+    void FrameCounter::NewFrame()
+    {
+        double now = mTimer.GetElapsedSeconds();
+        mSecondTimer += now;
+        mFPSCount++;
+        mFrameData.NumFrames++;
+        mFrameData.TotalRunTime += now;
+        mFrameData.LastFrameTime = now;
+
+        if (mSecondTimer >= 1.0)
+        {
+            mFrameData.CurrentFPS = mFPSCount;
+            mFPSCount = 0;
+            mSecondTimer = 0.0;
+        }
+
+        if (!mbMinimalTracking)
+        {
+            if (mFrameData.CurrentFPS > mFrameData.HighestFPS)
+            {
+                mFrameData.HighestFPS = mFrameData.CurrentFPS;
+            }
+
+            if (mFrameData.CurrentFPS < mFrameData.LowestFPS)
+            {
+                mFrameData.LowestFPS = mFrameData.CurrentFPS;
+            }
+
+            mFrameData.AverageFrameTime = mFrameData.TotalRunTime / mFrameData.NumFrames;
+            mFrameData.AverageFPS = mFrameData.NumFrames / mFrameData.TotalRunTime; // NOTE: Not 100% sure this is correct
+        }
+
+        mTimer.Reset();
+    }
+
+    const FrameData& FrameCounter::GetFrameData() const
+    {
+        return mFrameData;
+    }
+}

src/utils/FrameCounter.h

@@ -0,0 +1,47 @@
+/******************************************************************************
+*	File		-	FrameCounter.h
+*	Author		-	Joey Pollack
+*	Date		-	2021/09/03 (y/m/d)
+*	Mod Date	-	2021/09/03 (y/m/d)
+*	Description	-	Tracks frame statistics
+******************************************************************************/
+
+#ifndef FRAME_COUNTER_H_
+#define FRAME_COUNTER_H_
+
+#include <stdint.h>
+#include "highResTimer.h"
+
+namespace lunarium
+{
+    struct FrameData
+    {
+        uint64_t NumFrames;
+        double TotalRunTime;
+        double AverageFrameTime;
+        double LastFrameTime;
+        uint32_t CurrentFPS;
+        uint32_t AverageFPS;
+        uint32_t LowestFPS;
+        uint32_t HighestFPS;
+    };
+
+    class FrameCounter
+    {
+    public:
+        void Reset(bool minimalTracking = false);
+        void NewFrame();
+
+        const FrameData& GetFrameData() const;
+
+    private:
+        bool mbMinimalTracking; // If true will only track basic data
+        FrameData mFrameData;
+        HighResTimer mTimer;
+        double mSecondTimer;
+        int mFPSCount;
+    };
+}
+
+
+#endif  // FRAME_COUNTER_H_

src/utils/OpRes.cpp

@@ -36,8 +36,18 @@ namespace lunarium
 		return res.Type == ResultType::OK;
 	}
 
+	bool IsOK(OpRes& res)
+	{
+		return res.Type == ResultType::OK;
+	}
+
 	bool Failed(OpRes&& res)
 	{
 		return res.Type == ResultType::FAIL;
 	}
+
+	bool Failed(OpRes& res)
+	{
+		return res.Type == ResultType::FAIL;
+	}
 }

src/utils/OpRes.h

@@ -36,8 +36,10 @@ namespace lunarium
 	};
 
 	bool IsOK(OpRes&& res);
+	bool IsOK(OpRes& res);
 
 	bool Failed(OpRes&& res);
+	bool Failed(OpRes& res);
 }
 
 #endif	// _OPERATION_RESULT_H_

src/utils/helpers.cpp

@@ -31,12 +31,15 @@ namespace lunarium
     std::string System::GetGLSLVersionString()
     {
         std::string glsl_version = "#version ";
-        glsl_version += OPENGL_MAJOR_VERSION;
-        glsl_version += OPENGL_MINOR_VERSION;
+        glsl_version += (OPENGL_MAJOR_VERSION + 48);	// Need to convert to ascii
+        glsl_version += (OPENGL_MINOR_VERSION) + 48;
         glsl_version += "0";
         return glsl_version;
     }
 
+	////////////////////////////////////////////////////////////
+	//				STRING MANIPULATION
+	////////////////////////////////////////////////////////////
     std::vector<std::string> String::Split(std::string str, char delim, int maxSplits)
 	{
 		std::vector<std::string> splits;
@@ -166,4 +169,33 @@ namespace lunarium
 
         return str;
     }
+
+	////////////////////////////////////////////////////////////
+	//				PATH MANIPULATION
+	////////////////////////////////////////////////////////////
+	std::string String::GetFileNameFromPath(std::string path, bool includeExt)
+	{
+		path.erase(path.begin(), std::find_if(path.rbegin(), path.rend(), [](int ch) { return ch == '\\' || ch == '/'; }).base());
+
+		if (!includeExt)
+		{
+			path.erase(std::find_if(path.rbegin(), path.rend(), [](int ch) { return ch == '.'; }).base(), path.end());
+			path.erase(path.begin() + path.size() - 1);
+		}
+
+		return path;
+	}
+
+	std::string String::TrimFileNameFromPath(std::string path)
+	{
+		path.erase(std::find_if(path.rbegin(), path.rend(), [](int ch) { return ch == '\\' || ch == '/'; }).base(), path.end());
+		return path;
+	}
+
+	std::string String::GetFileExtension(std::string filename)
+	{
+		filename.erase(filename.begin(), std::find_if(filename.begin(), filename.end(), [](int ch) { return ch == '.'; }));
+		filename.erase(filename.begin());
+		return filename;
+	}
 }

src/utils/helpers.h

@@ -45,6 +45,10 @@ namespace lunarium
 
         static std::string StringToUpper(std::string str);
         static std::string StringToLower(std::string str);
+
+        static std::string GetFileNameFromPath(std::string path, bool includeExt);
+        static std::string TrimFileNameFromPath(std::string path);
+        static std::string GetFileExtension(std::string filename);
     };
 }