cleaning up

src/engine.cpp

@@ -0,0 +1,106 @@
+#include <engine.hpp>
+#include <algorithm>
+#include <cstdlib>
+#include <ctime>
+#include <ncurses.h>
+#include <ranges>
+#include <iostream>
+#include <thread>
+#include <chrono>
+
+void Window::draw_display() {
+	for(int i : std::ranges::views::iota(0, ROW)) {
+		for(int j : std::ranges::views::iota(0, COL)) {
+			mvaddch(i, j * 2, view[i][j]);
+		}
+	}
+	refresh();
+}
+
+void Window::update_display(vec2 &head, vec2 &fruit, std::vector<vec2> &buf) {
+	for(auto& row : view) row.fill('.');
+	view[head.y][head.x] = '*';
+	view[fruit.y][fruit.x] = 'o';
+
+	for(const auto& segment : buf) {
+		if(segment.x < COL && segment.y < ROW) {
+			view[segment.y][segment.x] = '~';
+		}
+	}
+}
+
+Engine::Engine() {
+	std::srand(std::time(0));
+	initscr();
+	cbreak();
+	noecho();
+	curs_set(0);
+	nodelay(stdscr, true);
+}
+
+Engine::~Engine() {
+	endwin();
+}
+
+void Engine::run() {
+	while (exit_summary() && process_input()) {
+		add_tail_and_respawn_fruit();
+		determine_index_zero_pos();
+		move_tail_indicies();
+
+		win.update_display(head, fruit, buf);
+		win.draw_display();
+		std::this_thread::sleep_for(std::chrono::milliseconds((int) (200)));
+	}
+}
+
+bool Engine::process_input() {
+	int ch;
+	while((ch = getch()) != ERR) {
+		if(ch == 'q') { return false; }
+		else if(ch == 'w') { if(dir != Direction::DOWN)  dir = Direction::UP; }
+		else if(ch == 's') { if(dir != Direction::UP)    dir = Direction::DOWN; }
+		else if(ch == 'd') { if(dir != Direction::LEFT)  dir = Direction::RIGHT; }
+		else if(ch == 'a') { if(dir != Direction::RIGHT) dir = Direction::LEFT; }
+	}
+	return true;
+}
+
+bool Engine::exit_summary() {
+	if(buf.size() >= ROW * COL) {
+		std::cout << "You filled the whole board and won! Score: " << m_score << "\n";
+		std::this_thread::sleep_for(std::chrono::seconds(1));
+		return false;
+	}
+	if(std::any_of(buf.begin(), buf.end(), [&](const vec2& segment) { return segment == head; })) {
+		std::cout << "You collided with yourself and died! Score: " << m_score << "\n";
+		std::this_thread::sleep_for(std::chrono::seconds(1));
+		return false;
+	}
+	return true;
+}
+
+void Engine::determine_index_zero_pos() {
+	prev_head.set(head.x, head.y);
+
+	if(dir == Direction::LEFT) 	 { head.x = (head.x + COL - 1) % COL; }
+	else if(dir == Direction::RIGHT) { head.x = (head.x + 1) % COL; }
+	else if(dir == Direction::UP) 	 { head.y = (head.y + ROW - 1) % ROW; }
+	else if(dir == Direction::DOWN)  { head.y = (head.y + 1) % ROW; }
+}
+
+void Engine::move_tail_indicies() {
+	if(buf.empty()) return;
+	buf.pop_back();
+	buf.insert(buf.begin(), prev_head);
+}
+
+void Engine::add_tail_and_respawn_fruit() {
+	if(fruit != head) return;
+	vec2 new_pos { 0, 0 };
+	do { new_pos.set((rand() % ROW), (rand() % COL)); }
+	while (new_pos == head || std::any_of(buf.begin(), buf.end(), [&](const vec2& seg) { return seg == new_pos; }));
+	fruit = new_pos;
+	buf.insert(buf.begin(), vec2 { ROW, COL });
+	m_score++;
+}