Game.cpp

#include "Game.h"

// Split constructor (let it call initialize and load)
Game::Game(unsigned int width, unsigned int height, std::string windowTitle)
{
	// Set the width, height, & title
	this->width = width;
	this->height = height;
	this->windowTitle = windowTitle;

	// Create the window
	window.create(sf::VideoMode(width, height), windowTitle);

	// Frame stuff
	window.setFramerateLimit(0);
	window.setVerticalSyncEnabled(true);

	// Misc
	window.setMouseCursorVisible(true);

	this->initialize();
	this->loadContent();
}

void Game::initialize()
{
	timePerTick = sf::seconds(1.0f / 60.0f);
	timeSinceLastUpdate = sf::Time::Zero;
	frameTime = sf::Time::Zero;
}

void Game::loadContent()
{
	// Get fonts
	robotoFont.loadFromFile("Fonts/Roboto.ttf");

	// Set FPS text
	fps.setFont(robotoFont);
	fps.setCharacterSize(16);
	fps.setPosition(10.0f, 10.0f);

	// Load the player class
	player.create("Sprites/Skeleton.png", 4, 9, sf::Vector2f(100, 100));
}

/*\ //*******************************************
|*|
|*|	GAME LOOP
|*|	  - run() Handles events
|*|   - update() Handles game updates
|*|   - draw() Renders everything
|*|
\*/ //*******************************************
void Game::run()
{
	while (window.isOpen())
	{
		// Create event
		sf::Event event;

		// Handle events
		while (window.pollEvent(event))
		{
			if (event.type == sf::Event::Closed)
				window.close();
		}

		// Exit game
		if (sf::Keyboard::isKeyPressed(sf::Keyboard::Escape))
			window.close();

		// Updates
		update();
	}
}

void Game::update()
{
	// Get the time since this method was last called
	frameTime = clock.restart();
	timeSinceLastUpdate += frameTime;

	// Update per tick (around 60 ticks per second)
	while (timeSinceLastUpdate > timePerTick)
	{
		timeSinceLastUpdate -= timePerTick;

		// Update player
		player.update(timePerTick.asSeconds());
	}
	
	// Update FPS
	fps.setString("FPS: " + std::to_string((int)(1.0f / frameTime.asSeconds())));

	// Draw
	draw();
}

void Game::draw()
{
	// Time between each tick
	const float alpha = timeSinceLastUpdate / timePerTick;

	// Draw everything
	window.clear();
	window.draw(fps);
	player.draw(window, alpha);
	window.display();
}