mirror of
https://github.com/Cola-Echo/memory-manager-concurrent.git
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339 lines
9.3 KiB
JavaScript
339 lines
9.3 KiB
JavaScript
/**
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* snake.js
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* @author okaychen
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* @description
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* @created Fri Dec 01 2017 11:24:41 GMT+0800 (中国标准时间)
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* @copyright None
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* None
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* @last-modified Fri Dec 01 2017 17:08:44 GMT+0800 (中国标准时间)
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*/
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(function () {
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// Canvas & Context
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var canvas;
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var ctx;
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// Snake
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var snake;
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var snake_dir;
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var snake_next_dir;
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var snake_speed;
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// Food
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var food = {
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x: 0,
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y: 0
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};
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// score
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var score;
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// wall
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var wall;
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// HTML Elements
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var screen_snake;
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var screen_menu;
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var screen_settings;
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var screen_gameover;
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var button_newgame_menu;
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var button_newgame_settings;
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var button_newgame_gameover;
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var button_setting_menu;
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var button_setting_gameover;
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var ele_score;
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var speed_setting;
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var wall_setting;
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/*-------------*/
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var activeDot = function (x, y) {
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ctx.fillStyle = "#eee";
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ctx.fillRect(x * 10, y * 10, 10, 10);
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}
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// changer dir
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var changeDir = function (key) {
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if (key == 38 && snake_dir != 2) {
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snake_next_dir = 0;
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} else {
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if (key == 39 && snake_dir != 3) {
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snake_next_dir = 1;
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} else {
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if (key == 40 && snake_dir != 0) {
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snake_next_dir = 2;
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} else {
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if (key == 37 && snake_dir != 1) {
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snake_next_dir = 3;
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}
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}
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}
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}
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}
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// add food
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var addFood = function () {
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food.x = Math.floor(Math.random() * ((canvas.width / 10) - 1));
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food.y = Math.floor(Math.random() * ((canvas.height / 10) - 1));
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for (var i = 0; i < snake.length; i++) {
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// 如果食物被吃就增加食物
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if (checkBlock(food.x, food.y, snake[i].x, snake[i].y)) {
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addFood();
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}
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}
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}
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var checkBlock = function (x, y, _x, _y) {
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return (x == _x && y == _y) ? true : false;
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}
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////////////////////////////////////////////
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var altScore = function (score_val) {
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ele_score.innerHTML = String(score_val);
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}
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////////////////////////////////////////////
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var mainLoop = function () {
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var _x = snake[0].x;
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var _y = snake[0].y;
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snake_dir = snake_next_dir;
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// 0 — up 1 — right 2 — down 3 — left
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switch (snake_dir) {
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case 0:
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_y--;
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break;
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case 1:
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_x++;
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break;
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case 2:
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_y++;
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break;
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case 3:
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_x--;
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break;
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}
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snake.pop();
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snake.unshift({
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x: _x,
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y: _y
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})
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// --wall
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if (wall == 1) {
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if (snake[0].x < 0 || snake[0].x == canvas.width / 10 || snake[0].y < 0 || snake[0].y == canvas.height / 10) {
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showScreen(3);
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return;
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}
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} else {
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// off 无墙
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for (var i = 0, x = snake.length; i < x; i++) {
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if (snake[i].x < 0) {
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snake[i].x = snake[i].x + (canvas.width / 10);
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}
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if (snake[i].x == canvas.width / 10) {
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snake[i].x = snake[i].x - (canvas.width / 10);
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}
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if (snake[i].y < 0) {
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snake[i].y = snake[i].y + (canvas.height / 10);
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}
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if (snake[i].y == canvas.height / 10) {
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snake[i].y = snake[i].y - (canvas.height / 10);
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}
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}
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}
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// Autophagy death
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for (var i = 1; i < snake.length; i++) {
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if (snake[0].x == snake[i].x && snake[0].y == snake[i].y) {
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showScreen(3);
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return;
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}
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}
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// Eat food
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if (checkBlock(snake[0].x, snake[0].y, food.x, food.y)) {
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snake[snake.length] = {
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x: snake[0].x,
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y: snake[0].y
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};
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score += 1;
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altScore(score);
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addFood();
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activeDot(food.x, food.y);
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}
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// --------------------
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ctx.beginPath();
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ctx.fillStyle = "#111";
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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// --------------------
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for (var i = 0; i < snake.length; i++) {
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activeDot(snake[i].x, snake[i].y);
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}
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// --------------------
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activeDot(food.x, food.y);
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setTimeout(mainLoop, snake_speed);
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}
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var newGame = function () {
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showScreen(0);
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screen_snake.focus();
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snake = [];
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for (var i = 4; i >= 0; i--) {
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snake.push({
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x: i,
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y: 15
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});
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}
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snake_next_dir = 1;
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score = 0;
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altScore(score);
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addFood();
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canvas.onkeydown = function (evt) {
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evt = evt || window.event;
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changeDir(evt.keyCode);
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}
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mainLoop();
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}
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// Change the snake speed...
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// 150 = slow
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// 100 = normal
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// 50 = fast
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var setSnakeSpeed = function (speed_value) {
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snake_speed = speed_value;
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}
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////////////////////////////////////////////
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var setWall = function (wall_value) {
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wall = wall_value;
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if (wall == 0) {
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screen_snake.style.borderColor = '#606060';
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}
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if (wall == 1) {
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screen_snake.style.borderColor = '#FFF';
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}
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}
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// 0 show the game (canvas)
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// 1 show the main menu
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// 2 show the settings menu
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// 3 show the gameover menu
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var showScreen = function (screen_opt) {
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switch (screen_opt) {
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case 0:
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screen_snake.style.display = "block";
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screen_menu.style.display = "none";
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screen_settings.style.display = "none";
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screen_gameover.style.display = "none";
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break;
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case 1:
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screen_snake.style.display = "none";
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screen_menu.style.display = "block";
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screen_settings.style.display = "none";
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screen_gameover.style.display = "none";
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break;
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case 2:
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screen_snake.style.display = "none";
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screen_menu.style.display = "none";
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screen_settings.style.display = "block";
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screen_gameover.style.display = "none";
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break;
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case 3:
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screen_snake.style.display = "none";
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screen_menu.style.display = "none";
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screen_settings.style.display = "none";
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screen_gameover.style.display = "block";
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break;
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}
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}
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window.onload = function () {
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canvas = document.getElementById('snake');
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ctx = canvas.getContext('2d');
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// Screen
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screen_snake = document.getElementById('snake');
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screen_menu = document.getElementById('menu');
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screen_gameover = document.getElementById('gameOver');
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screen_settings = document.getElementById('settings');
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// Buttons
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button_newgame_menu = document.getElementById('newgame_menu');
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button_newgame_setting = document.getElementById('newgame_setting');
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button_newgame_gameover = document.getElementById('newgame_gameOver');
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button_setting_menu = document.getElementById('setting_menu');
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button_setting_gameover = document.getElementById('setting_gameOver');
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// etc
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ele_score = document.getElementById('score_value');
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speed_setting = document.getElementsByName('speed');
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wall_setting = document.getElementsByName('wall');
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// -------------
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button_newgame_menu.onclick = function () {
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newGame();
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};
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button_newgame_gameover.onclick = function () {
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newGame();
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};
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button_newgame_setting.onclick = function () {
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newGame();
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};
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button_setting_menu.onclick = function () {
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showScreen(2);
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};
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button_setting_gameover.onclick = function () {
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showScreen(2)
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};
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setSnakeSpeed(150);
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setWall(1);
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showScreen("menu");
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// --------------------
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// Settings
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// speed
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for (var i = 0; i < speed_setting.length; i++) {
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speed_setting[i].addEventListener("click", function () {
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for (var i = 0; i < speed_setting.length; i++) {
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if (speed_setting[i].checked) {
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setSnakeSpeed(speed_setting[i].value);
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}
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}
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});
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}
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// wall
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for (var i = 0; i < wall_setting.length; i++) {
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wall_setting[i].addEventListener("click", function () {
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for (var i = 0; i < wall_setting.length; i++) {
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if (wall_setting[i].checked) {
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setWall(wall_setting[i].value);
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}
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}
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});
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}
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document.onkeydown = function (evt) {
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if (screen_gameover.style.display == "block") {
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evt = evt || window.event;
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if (evt.keyCode == 32) {
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newGame();
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}
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}
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}
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}
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})()
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