conways-game-of-life-cpu/Conways/main.cpp

#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>
#include <random>
#include <windows.h>
#include "Node.h"
#include <thread>
#include <stack>

const int WINDOW_X = 1000;
const int WINDOW_Y = 1000;

float elap_time() {
	static __int64 start = 0;
	static __int64 frequency = 0;

	if (start == 0) {
		QueryPerformanceCounter((LARGE_INTEGER*)&start);
		QueryPerformanceFrequency((LARGE_INTEGER*)&frequency);
		return 0.0f;
	}

	__int64 counter = 0;
	QueryPerformanceCounter((LARGE_INTEGER*)&counter);
	return (float)((counter - start) / double(frequency));
}

void updateRange(std::vector<Node> *node_vec, int start_range_, int end_range_) {
	for (int i = start_range_; i < end_range_; i++) {
		node_vec->operator[](i).Update(node_vec);
	}
}



int main() {

	std::mt19937 rng(time(NULL));
	std::uniform_int_distribution<int> rgen(0, 10);

	std::vector<Node> node_vec;

	// Init nodes, random value, push to front_stack
	for (int x = 0; x < Node::x_bound; x++) {
		for (int y = 0; y < Node::y_bound; y++) {
			node_vec.push_back(Node(sf::Vector2i(x, y)));
			if (rgen(rng) == 1) {
				node_vec.at(node_vec.size() - 1).Revive();
			}
		}
	}

	// Spites for drawing, probably where the biggest slowdown is
	sf::RectangleShape live_node;
	live_node.setFillColor(sf::Color(145, 181, 207));
	live_node.setSize(sf::Vector2f(WINDOW_X / Node::x_bound, WINDOW_Y / Node::y_bound));

	// Init window, and loop data
	sf::RenderWindow window(sf::VideoMode(WINDOW_X, WINDOW_Y), "Classic Games");

	float step_size = 0.0005f;
	double frame_time = 0.0, elapsed_time = 0.0, delta_time = 0.0, accumulator_time = 0.0, current_time = 0.0;
	int frame_count = 0;

	std::stack<std::thread> thread_stack;

	sf::Uint8* pixel_array = new sf::Uint8[WINDOW_X * WINDOW_Y * 4];

	while (window.isOpen()) {

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

		// Time keeping
		elapsed_time = elap_time();
		delta_time = elapsed_time - current_time;
		current_time = elapsed_time;
		if (delta_time > 0.02f)
			delta_time = 0.02f;
		accumulator_time += delta_time;

		while ((accumulator_time - step_size) >= step_size) {
			accumulator_time -= step_size;
			
			// Do nothing, FPS tied update()
		}

		// Implicit dead node color
		window.clear(sf::Color(49, 68, 72));

		for (int i = 0; i < 12; i++) {
			thread_stack.emplace(updateRange, &node_vec, (node_vec.size() / 12)* i, (node_vec.size() / 12)* (i + 1));
		}
		while (!thread_stack.empty()) {
			thread_stack.top().join();
			thread_stack.pop();
		}

		//for (int i = 0; i < node_vec.size(); i++) {
		//	node_vec.at(i).Update(&node_vec);
		//}

		for (int i = 0; i < node_vec.size(); i++) {
			node_vec[i].ShiftState();
		}



		sf::VertexArray live_node_vertex_array;

		//for (int i = 0; i < node_vec.size(); i++) {
		//	if (node_vec.at(i).CurrentState() == true) {

		//		// 6 vert square, one line heaven
		//		sf::Vector2f square_dimensions(WINDOW_X / Node::x_bound, WINDOW_Y / Node::y_bound);

		//		//sf::Vertex vert1(sf::Vector2f((i % Node::x_bound) * live_node.getGlobalBounds().width, (i / Node::x_bound) * live_node.getGlobalBounds().height), sf::Color(145, 181, 207)); // Top left
		//		//sf::Vertex vert2(sf::Vector2f((i % Node::x_bound) * live_node.getGlobalBounds().width + square_dimensions.x, (i / Node::x_bound) * live_node.getGlobalBounds().height), sf::Color(145, 181, 207)); // Top right
		//		//sf::Vertex vert3(sf::Vector2f((i % Node::x_bound) * live_node.getGlobalBounds().width, (i / Node::x_bound) * live_node.getGlobalBounds().height + square_dimensions.y), sf::Color(145, 181, 207)); // Bottom left

		//		//sf::Vertex vert4(sf::Vector2f((i % Node::x_bound) * live_node.getGlobalBounds().width, (i / Node::x_bound) * live_node.getGlobalBounds().height + square_dimensions.y), sf::Color(145, 181, 207)); // Bottom left
		//		//sf::Vertex vert5(sf::Vector2f((i % Node::x_bound) * live_node.getGlobalBounds().width + square_dimensions.x, (i / Node::x_bound) * live_node.getGlobalBounds().height), sf::Color(145, 181, 207)); // Top right
		//		sf::Vertex vert6(sf::Vector2f((i % Node::x_bound) * live_node.getGlobalBounds().width + square_dimensions.x, (i / Node::x_bound) * live_node.getGlobalBounds().height + square_dimensions.y), sf::Color(145, 181, 207)); // Bottom right


		//		//live_node_vertex_array.append(vert1);
		//		//live_node_vertex_array.append(vert2);
		//		//live_node_vertex_array.append(vert3);
		//		//live_node_vertex_array.append(vert4);
		//		//live_node_vertex_array.append(vert5);
		//		live_node_vertex_array.append(vert6);


		//		//live_node.setPosition((i % Node::x_bound) * live_node.getGlobalBounds().width, (i / Node::x_bound) * live_node.getGlobalBounds().height);


		//	}
		//}

		sf::Texture texture;
		texture.create(WINDOW_X, WINDOW_Y);

		sf::Sprite sprite(texture);

		for (int i = 0; i < node_vec.size(); i++) {
			if (node_vec.at(i).CurrentState() == true) {



				pixel_array[i * 4] = 255; // R?
				pixel_array[i * 4 + 1] = 255; // G?
				pixel_array[i * 4 + 2] = 255; // B?
				pixel_array[i * 4 + 3] = 255; // A?



			}
		}

		texture.update(pixel_array);
		window.draw(sprite);

		window.display();



	}
	return 0;

}