Merge branch 'master' into niels/resource-manager

15 files changed, 422 insertions, 0 deletions

diff --git a/mwe/gameloop/CMakeLists.txt b/mwe/gameloop/CMakeLists.txt
new file mode 100644
index 0000000..233ba98
--- /dev/null
+++ b/mwe/gameloop/CMakeLists.txt
@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.5)
+project(gameloop)
+
+# Set the C++ standard (optional, but good practice)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+
+# Find the SDL2 package
+find_package(SDL2 REQUIRED)
+
+add_executable(gameloop
+	src/loopManager.cpp
+	src/window.cpp
+	src/main.cpp
+	src/eventManager.cpp
+	src/gameObject.cpp
+	src/timer.cpp
+)
+
+# Link the SDL2 library to your project
+target_link_libraries(gameloop ${SDL2_LIBRARIES})
+
+# Include SDL2 header files and project headers
+target_include_directories(gameloop PRIVATE ${SDL2_INCLUDE_DIRS})
+target_include_directories(gameloop PRIVATE ${CMAKE_SOURCE_DIR}/include)
+
diff --git a/mwe/gameloop/imgs/demo.bmp b/mwe/gameloop/imgs/demo.bmp
new file mode 100644
index 0000000..65354fe
--- /dev/null
+++ b/mwe/gameloop/imgs/demo.bmp
diff --git a/mwe/gameloop/imgs/demo.jpg b/mwe/gameloop/imgs/demo.jpg
new file mode 100644
index 0000000..f534e1b
--- /dev/null
+++ b/mwe/gameloop/imgs/demo.jpg
diff --git a/mwe/gameloop/include/eventManager.h b/mwe/gameloop/include/eventManager.h
new file mode 100644
index 0000000..69c6801
--- /dev/null
+++ b/mwe/gameloop/include/eventManager.h
@@ -0,0 +1 @@
+class EventManager {};
diff --git a/mwe/gameloop/include/gameObject.h b/mwe/gameloop/include/gameObject.h
new file mode 100644
index 0000000..69f4d52
--- /dev/null
+++ b/mwe/gameloop/include/gameObject.h
@@ -0,0 +1,31 @@
+#pragma once
+#include <iostream>
+class GameObject {
+public:
+	GameObject();
+	GameObject(std::string name, float x, float y, float width, float height,
+			   float velX, float velY);
+	std::string getName() const;
+	float getX() const;
+	float getY() const;
+	float getWidth() const;
+	float getHeight() const;
+	float getVelX() const;
+	float getVelY() const;
+	void setName(std::string value);
+	void setX(float value);
+	void setY(float value);
+	void setWidth(float value);
+	void setHeight(float value);
+	void setVelX(float value);
+	void setVelY(float value);
+
+private:
+	std::string name = "";
+	float x = 0;
+	float y = 0;
+	float width = 0;
+	float height = 0;
+	float velX = 0;
+	float velY = 0;
+};
diff --git a/mwe/gameloop/include/loopManager.h b/mwe/gameloop/include/loopManager.h
new file mode 100644
index 0000000..e202423
--- /dev/null
+++ b/mwe/gameloop/include/loopManager.h
@@ -0,0 +1,25 @@
+#pragma once
+#include "gameObject.h"
+#include "window.h"
+#include <SDL2/SDL.h>
+class LoopManager {
+public:
+	LoopManager();
+	void setup();
+	void loop();
+
+private:
+	std::vector<GameObject *> objectList;
+	void processInput();
+	void update();
+	void lateUpdate();
+	void fixedUpdate();
+	void render();
+	bool gameRunning = false;
+	WindowManager window;
+	int timeScale = 1;
+	float accumulator = 0.0;
+	double currentTime;
+	double t = 0.0;
+	double dt = 0.01;
+};
diff --git a/mwe/gameloop/include/timer.h b/mwe/gameloop/include/timer.h
new file mode 100644
index 0000000..22383b2
--- /dev/null
+++ b/mwe/gameloop/include/timer.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <SDL2/SDL.h>
+
+class LoopTimer {
+public:
+	static LoopTimer & getInstance();
+	void start();
+	void update();
+	double getDeltaTime() const;
+	int getCurrentTime() const;
+	void advanceFixedUpdate();
+	double getFixedDeltaTime() const;
+	void setFPS(int FPS);
+	int getFPS() const;
+	void enforceFrameRate();
+	double getLag() const;
+
+private:
+	LoopTimer();
+	int FPS = 50;
+	double gameScale = 1;
+	double maximumDeltaTime = 0.25;
+	double deltaTime;
+	double frameTargetTime = FPS / 1000;
+	double fixedDeltaTime = 0.01;
+	double elapsedTime;
+	double elapsedFixedTime;
+	double time;
+	uint64_t lastFrameTime;
+};
diff --git a/mwe/gameloop/include/window.h b/mwe/gameloop/include/window.h
new file mode 100644
index 0000000..6806a26
--- /dev/null
+++ b/mwe/gameloop/include/window.h
@@ -0,0 +1,21 @@
+#pragma once
+#include "gameObject.h"
+#include <SDL2/SDL.h>
+#include <iostream>
+#include <vector>
+class WindowManager {
+public:
+	WindowManager();
+	virtual ~WindowManager();
+	void render(std::vector<GameObject *> objects);
+	bool initWindow();
+	void destroyWindow();
+
+	SDL_Renderer * getRenderer();
+
+private:
+	const int SCREEN_WIDTH = 800;
+	const int SCREEN_HEIGHT = 600;
+	SDL_Window * window = NULL;
+	SDL_Renderer * renderer = NULL;
+};
diff --git a/mwe/gameloop/src/eventManager.cpp b/mwe/gameloop/src/eventManager.cpp
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/mwe/gameloop/src/eventManager.cpp
diff --git a/mwe/gameloop/src/gameObject.cpp b/mwe/gameloop/src/gameObject.cpp
new file mode 100644
index 0000000..78217c4
--- /dev/null
+++ b/mwe/gameloop/src/gameObject.cpp
@@ -0,0 +1,30 @@
+#include "gameObject.h"
+std::string GameObject::getName() const { return name; }
+float GameObject::getX() const { return x; }
+
+float GameObject::getY() const { return y; }
+
+float GameObject::getWidth() const { return width; }
+
+float GameObject::getHeight() const { return height; }
+
+float GameObject::getVelX() const { return velX; }
+
+float GameObject::getVelY() const { return velY; }
+void GameObject::setName(std::string value) { name = value; }
+void GameObject::setX(float value) { x = value; }
+
+void GameObject::setY(float value) { y = value; }
+
+void GameObject::setWidth(float value) { width = value; }
+
+void GameObject::setHeight(float value) { height = value; }
+
+void GameObject::setVelX(float value) { velX = value; }
+
+void GameObject::setVelY(float value) { velY = value; }
+
+GameObject::GameObject(std::string name, float x, float y, float width,
+					   float height, float velX, float velY)
+	: name(name), x(x), y(y), width(width), height(height), velX(velX),
+	  velY(velY) {}
diff --git a/mwe/gameloop/src/loopManager.cpp b/mwe/gameloop/src/loopManager.cpp
new file mode 100644
index 0000000..cb532cc
--- /dev/null
+++ b/mwe/gameloop/src/loopManager.cpp
@@ -0,0 +1,69 @@
+#include "loopManager.h"
+#include "timer.h"
+LoopManager::LoopManager() {}
+void LoopManager::processInput() {
+	SDL_Event event;
+	SDL_PollEvent(&event);
+	switch (event.type) {
+		case SDL_QUIT:
+			gameRunning = false;
+			break;
+		case SDL_KEYDOWN:
+			if (event.key.keysym.sym == SDLK_ESCAPE) {
+				gameRunning = false;
+			}
+			break;
+	}
+}
+void LoopManager::fixedUpdate() { fprintf(stderr, "fixed update\n"); }
+void LoopManager::loop() {
+	LoopTimer & timer = LoopTimer::getInstance();
+	timer.start();
+
+	while (gameRunning) {
+		timer.update();
+
+		while (timer.getLag() >= timer.getFixedDeltaTime()) {
+			processInput();
+			fixedUpdate();
+			timer.advanceFixedUpdate();
+		}
+
+		update();
+		render();
+
+		timer.enforceFrameRate();
+	}
+
+	window.destroyWindow();
+}
+
+void LoopManager::setup() {
+	gameRunning = window.initWindow();
+	LoopTimer::getInstance().start();
+	LoopTimer::getInstance().setFPS(50);
+
+	for (int i = 0; i < 2; i++) {
+		GameObject * square
+			= new GameObject("square2", i * 40, i * 40, 20, 20, 0, 0);
+		objectList.push_back(square);
+	}
+}
+void LoopManager::render() {
+	fprintf(stderr, "**********render********** \n");
+	if (gameRunning) {
+		window.render(objectList);
+	}
+}
+
+void LoopManager::update() {
+	fprintf(stderr, "**********normal update********** \n");
+	LoopTimer & timer = LoopTimer::getInstance();
+
+	float delta = timer.getDeltaTime();
+
+	for (int i = 0; i < objectList.size(); i++) {
+		objectList[i]->setX(objectList[i]->getX() + 50 * delta);
+		objectList[i]->setY(objectList[i]->getY() + 50 * delta);
+	}
+}
diff --git a/mwe/gameloop/src/main.cpp b/mwe/gameloop/src/main.cpp
new file mode 100644
index 0000000..889a30a
--- /dev/null
+++ b/mwe/gameloop/src/main.cpp
@@ -0,0 +1,17 @@
+//Using SDL and standard IO
+#include <SDL2/SDL.h>
+#include <stdio.h>
+//#include "window.h"
+#include "loopManager.h"
+#include "timer.h"
+//Screen dimension constants
+
+//Starts up SDL and creates window
+
+int main(int argc, char * args[]) {
+	LoopManager gameLoop;
+	gameLoop.setup();
+	gameLoop.loop();
+
+	return 0;
+}
diff --git a/mwe/gameloop/src/timer.cpp b/mwe/gameloop/src/timer.cpp
new file mode 100644
index 0000000..61e144d
--- /dev/null
+++ b/mwe/gameloop/src/timer.cpp
@@ -0,0 +1,58 @@
+#include "timer.h"
+
+// Constructor (private)
+LoopTimer::LoopTimer() {}
+
+// Get the singleton instance of the timer
+LoopTimer & LoopTimer::getInstance() {
+	static LoopTimer instance;
+	return instance;
+}
+
+// Start the timer (initialize frame time)
+void LoopTimer::start() {
+	lastFrameTime = SDL_GetTicks64();
+	elapsedTime = 0;
+	elapsedFixedTime = 0;
+	deltaTime = 0;
+}
+
+// Update the timer, calculate deltaTime
+void LoopTimer::update() {
+	uint64_t currentFrameTime = SDL_GetTicks64();
+	deltaTime
+		= (currentFrameTime - lastFrameTime) / 1000.0; // Convert to seconds
+
+	if (deltaTime > maximumDeltaTime) {
+		deltaTime = maximumDeltaTime;
+	}
+
+	elapsedTime += deltaTime;
+	lastFrameTime = currentFrameTime;
+}
+
+double LoopTimer::getDeltaTime() const { return deltaTime; }
+int LoopTimer::getCurrentTime() const { return SDL_GetTicks(); }
+
+void LoopTimer::advanceFixedUpdate() { elapsedFixedTime += fixedDeltaTime; }
+
+double LoopTimer::getFixedDeltaTime() const { return fixedDeltaTime; }
+
+void LoopTimer::setFPS(int FPS) {
+	this->FPS = FPS;
+	frameTargetTime = 1.0 / FPS;
+}
+
+int LoopTimer::getFPS() const { return FPS; }
+
+void LoopTimer::enforceFrameRate() {
+	uint64_t currentFrameTime = SDL_GetTicks64();
+	double frameDuration = (currentFrameTime - lastFrameTime) / 1000.0;
+
+	if (frameDuration < frameTargetTime) {
+		uint32_t delayTime
+			= (uint32_t) ((frameTargetTime - frameDuration) * 1000.0);
+		SDL_Delay(delayTime);
+	}
+}
+double LoopTimer::getLag() const { return elapsedTime - elapsedFixedTime; }
diff --git a/mwe/gameloop/src/window.cpp b/mwe/gameloop/src/window.cpp
new file mode 100644
index 0000000..dd1d98f
--- /dev/null
+++ b/mwe/gameloop/src/window.cpp
@@ -0,0 +1,57 @@
+#include "window.h"
+WindowManager::WindowManager() {
+	if (!initWindow()) {
+		printf("Failed to initialize!\n");
+	}
+}
+WindowManager::~WindowManager() { destroyWindow(); }
+SDL_Renderer * WindowManager::getRenderer() { return renderer; }
+
+void WindowManager::render(std::vector<GameObject *> objects) {
+	// Set the draw color to black and clear the screen
+	SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+	SDL_RenderClear(renderer);
+
+	// Print object position (optional for debugging)
+	//fprintf(stderr, "%d\n", objectList.size());
+	for (int i = 0; i < objects.size(); i++) {
+		//fprintf(stderr, "%f\n", objectList[i]->getX());
+		// Create a rectangle representing the ball
+		SDL_Rect ball_rect = {
+			(int) objects[i]->getX(),
+			(int) objects[i]->getY(),
+			(int) objects[i]->getWidth(),
+			(int) objects[i]->getHeight(),
+		};
+		// Set the draw color to white and render the ball
+		SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+		SDL_RenderFillRect(renderer, &ball_rect);
+	}
+
+	SDL_RenderPresent(renderer);
+}
+
+bool WindowManager::initWindow() {
+	if (SDL_Init(SDL_INIT_EVERYTHING) != 0) {
+		fprintf(stderr, "Error inititalising SDL.\n");
+		return false;
+	}
+	window = SDL_CreateWindow("SDL Tutorial", SDL_WINDOWPOS_UNDEFINED,
+							  SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH,
+							  SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
+	if (!window) {
+		fprintf(stderr, "Error creating SDL Window. \n");
+		return false;
+	}
+	renderer = SDL_CreateRenderer(window, -1, 0);
+	if (!renderer) {
+		fprintf(stderr, "Error creating SDL renderer. \n");
+		return false;
+	}
+	return true;
+}
+void WindowManager::destroyWindow() {
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+	SDL_Quit();
+}
diff --git a/mwe/gameloop/versions/delayBased.cpp b/mwe/gameloop/versions/delayBased.cpp
new file mode 100644
index 0000000..253a03a
--- /dev/null
+++ b/mwe/gameloop/versions/delayBased.cpp
@@ -0,0 +1,56 @@
+#include "loopManager.h"
+#include "timer.h"
+LoopManager::LoopManager() {}
+void LoopManager::processInput() {
+	SDL_Event event;
+	SDL_PollEvent(&event);
+	switch (event.type) {
+		case SDL_QUIT:
+			gameRunning = false;
+			break;
+		case SDL_KEYDOWN:
+			if (event.key.keysym.sym == SDLK_ESCAPE) {
+				gameRunning = false;
+			}
+			break;
+	}
+}
+void LoopManager::loop() {
+	fprintf(stderr, "loop. \n");
+	while (gameRunning) {
+		//Timer::getInstance().update();
+		//deltaTime = Timer::getInstance().getDeltaTime();
+		processInput();
+		update();
+		render();
+	}
+	window.destroyWindow();
+}
+void LoopManager::setup() {
+	gameRunning = window.initWindow();
+	LoopTimer::getInstance().start();
+	LoopTimer::getInstance().setFPS(210);
+
+	for (int i = 0; i < 2; i++) {
+		GameObject * square2
+			= new GameObject("square2", i * 40, i * 40, 20, 20, 0, 0);
+		objectList.push_back(square2);
+	}
+}
+void LoopManager::render() {
+	if (gameRunning) {
+		window.render(objectList);
+	}
+}
+
+void LoopManager::update() {
+	LoopTimer & timer = LoopTimer::getInstance();
+	timer.enforceFrameRate();
+	timer.update();
+	float delta = timer.getDeltaTime();
+
+	for (int i = 0; i < objectList.size(); i++) {
+		objectList[i]->setX(objectList[i]->getX() + 50 * delta);
+		objectList[i]->setY(objectList[i]->getY() + 50 * delta);
+	}
+}