main.cpp

// main.cpp
#include <SFML/Graphics.hpp>
#include "Game_of_Life.h"
#include <thread>

constexpr unsigned D_SIZE = 100;
constexpr unsigned CELL = 10;
constexpr float TICK = 0.1f;


int main()
{

	sf::RenderWindow app(sf::VideoMode({ D_SIZE * CELL, D_SIZE * CELL }),
		"Life Game!", sf::Style::Default);
	// app.setFramerateLimit(60);

	// 初始化Life
	GameOfLife gol(D_SIZE, CELL);
	sf::Clock Game_clock;
	float acc = 0.0f;
	bool paused = true;

	while (app.isOpen())
	{

		while (std::optional<sf::Event> e = app.pollEvent())
		{

			if (e->is<sf::Event::Closed>())
			{
				app.close();
			}

			if (auto* mousePressed = e->getIf<sf::Event::MouseButtonPressed>())
			{
				if (mousePressed->button == sf::Mouse::Button::Left)
				{
					gol.toggleCell(mousePressed->position);
				}
			}

			if (auto* keyPressed = e->getIf<sf::Event::KeyPressed>())
			{
				if (keyPressed->code == sf::Keyboard::Key::Space)
				{
					paused = !paused;
				}
			}
			if (auto* keyPressed = e->getIf<sf::Event::KeyPressed>())
			{
				if (keyPressed->code == sf::Keyboard::Key::Escape)
				{
					gol.resetCell();
				}
			}
		}

		if (!paused)
		{

			float dt = Game_clock.restart().asSeconds();
			// printf("%f\n", dt);

			// 最多只允许追赶 5 个逻辑帧
			constexpr float MAX_DT = TICK * 5.0f;
			if (dt > MAX_DT) dt = MAX_DT;

			acc += dt;
			// printf("acc:%f, TICK:%f\n", acc, TICK);

			while (acc >= TICK)
			{
				gol.step();
				acc -= TICK;
			}
		}
		else
		{
			Game_clock.restart();
		}

		app.clear();
		// draw...
		app.draw(gol);
		app.display();
		std::this_thread::sleep_for(std::chrono::milliseconds(1));
	}

	return 0;
}