实验楼项目学习笔记-网页2048
首先我们需要有一张4X4的表格：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"/>
<title>shiyanlou-2048</title>
<link rel="stylesheet" href="style.css"/>
<script type="text/javascript" src="http://libs.baidu.com/jquery/2.0.3/jquery.min.js"></script>
<script type="text/javascript" src="main.js"></script>
<script type="text/javascript" src="showanimation.js"></script>
<script type="text/javascript" src="support.js"></script>
</head>
<body>
<header>
<h1>shiyanlou-2048</h1>
<a href="javascript:new_game();" id="new_game_button">New Game</a>
<p>score: <span id="score">0</span></p>
</header>
<div id="grid_container">
<div class="grid_cell" id="grid_cell_0_0"></div>
<div class="grid_cell" id="grid_cell_0_1"></div>
<div class="grid_cell" id="grid_cell_0_2"></div>
<div class="grid_cell" id="grid_cell_0_3"></div>
<div class="grid_cell" id="grid_cell_1_0"></div>
<div class="grid_cell" id="grid_cell_1_1"></div>
<div class="grid_cell" id="grid_cell_1_2"></div>
<div class="grid_cell" id="grid_cell_1_3"></div>
<div class="grid_cell" id="grid_cell_2_0"></div>
<div class="grid_cell" id="grid_cell_2_1"></div>
<div class="grid_cell" id="grid_cell_2_2"></div>
<div class="grid_cell" id="grid_cell_2_3"></div>
<div class="grid_cell" id="grid_cell_3_0"></div>
<div class="grid_cell" id="grid_cell_3_1"></div>
<div class="grid_cell" id="grid_cell_3_2"></div>
<div class="grid_cell" id="grid_cell_3_3"></div>
</div>
</body>
</html>
然后需要给页面和每个格子，加上样式：
//style.css
header {
display: block;
margin: 0 auto;
width: 100%;
text-align: center;
}
header h1 {
font-family: Arial;
font-size: 60px;
font-weight: bold;
margin: 0 auto;
}
header #new_game_button {
display: block;
margin: 0px auto;
width: 100px;
padding: 10px 10px;
background-color: #8f7a66;
font-family: Arial;
color: white;
border-radius: 10px;
text-decoration: none;
}
header #new_game_button:hover {
background-color: #9f8b77;
}
header p {
font-family: Arial;
font-size: 25px;
margin: 5px auto;
}
#grid_container {
width: 460px;
height: 460px;
padding: 20px;
margin: 0px auto;
background-color: #bbada0;
border-radius: 10px;
position: relative;
}
.grid_cell {
width: 100px;
height: 100px;
border-radius: 6px;
background-color: #ccc0b3;
position: absolute;
}
.number_cell {
border-radius: 6px;
font-family: Arial;
font-weight: bold;
font-size: 60px;
line-height: 100px;
text-align: center;
position: absolute;
}
//在main.js中
var board = new Array(); //每个格子的数字
var score = 0; //分数
var has_conflicted = new Array(); //解决连续消除的标记
var startx = 0; //移动端触摸屏幕时开始点的x坐标
var starty = 0; //移动端触摸屏幕时开始点的y坐标
var endx = 0; //移动端触摸屏幕时结束点的x坐标
var endy = 0; //移动端触摸屏幕时结束点的y坐标
var success_string = 'Success';
var gameover_string = 'GameOver';
//HTML文档加载完成后，初始化棋局
$(document).ready(function() {
//做自适应处理
prepare_for_mobile();
new_game();
});
//开始新游戏
function new_game() {
//初始化棋盘
init();
//在随机两个格子生成数字
generate_one_number();
generate_one_number();
}
//初始化
function init() {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
var grid_cell = $('#grid_cell_' + i + '_' + j);
grid_cell.css('top', get_pos_top(i, j));
grid_cell.css('left', get_pos_left(i, j));
}
}
for (var i = 0; i < 4; i++) {
board[i] = new Array();
has_conflicted[i] = new Array();
for (var j =0; j < 4; j++) {
board[i][j] = 0;
has_conflicted[i][j] = false;
}
}
update_board_view();
score = 0;
update_score(score);
}
//更新棋局
function update_board_view() {
$('.number_cell').remove();
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
$('#grid_container').append('<div id="number_cell_' + i + '_' + j + '"></div>');
var number_cell = $('#number_cell_' + i + '_' + j);
if (board[i][j] == 0) {
number_cell.css('width', '0px');
number_cell.css('height', '0px');
number_cell.css('top', get_pos_top(i, j) + cell_side_length / 2);
number_cell.css('left', get_pos_left(i, j) + cell_side_length / 2);
} else {
number_cell.css('width', cell_side_length);
number_cell.css('height', cell_side_length);
number_cell.css('top', get_pos_top(i, j));
number_cell.css('left', get_pos_left(i, j));
number_cell.css('background-color', get_number_background_color(board[i][j]));
number_cell.css('color', get_number_color(board[i][j]));
number_cell.text(board[i][j]);
}
has_conflicted[i][j] = false;
}
}
$('.number_cell').css('line-height', cell_side_length + 'px');
$('.number_cell').css('font-size', 0.6 * cell_side_length + 'px');
}
//随机在一个格子生成数字
function generate_one_number() {
if (nospace(board)) {
return false;
}
//随机一个位置
var randx = parseInt(Math.floor(Math.random() * 4));
var randy = parseInt(Math.floor(Math.random() * 4));
var time = 0;
while (time < 50) {
if (board[randx][randy] == 0) {
break;
}
randx = parseInt(Math.floor(Math.random() * 4));
randy = parseInt(Math.floor(Math.random() * 4));
time++;
}
if (time == 50) {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
if (board[i][j] == 0) {
randx = i;
randy = j;
}
}
}
}
//随机一个数字
var rand_number = Math.random() < 0.5 ? 2 : 4;
//在随机位置显示随机数字
board[randx][randy] = rand_number;
show_number_with_animation(randx, randy, rand_number);
return true;
}
//自适应处理
function prepare_for_mobile() {
if (document_width > 500) {
grid_container_width = 500;
cell_side_length = 100;
cell_space = 20;
}
$('#grid_container').css('width', grid_container_width - 2 * cell_space);
$('#grid_container').css('height', grid_container_width - 2 * cell_space);
$('#grid_container').css('padding', cell_space);
$('#grid_container').css('border-radius', 0.02 * grid_container_width);
$('.grid_cell').css('width', cell_side_length);
$('.grid_cell').css('height', cell_side_length);
$('.grid_cell').css('border-radius', 0.02 * grid_container_width);
}
//在support.js中
document_width = window.screen.availWidth; //屏幕宽度
grid_container_width = 0.92 * document_width; //期盘宽度
cell_side_length = 0.18 * document_width; //格子的大小
cell_space = 0.04 * document_width; //格子之间的间隔
//获得相应格子距离期盘顶部的距离
function get_pos_top(i, j) {
return cell_space + i * (cell_space + cell_side_length);
}
//获得相应格子距离棋盘左边的距离
function get_pos_left(i, j) {
return cell_space + j * (cell_space + cell_side_length);
}
//获得相应数字的背景色
function get_number_background_color(number) {
switch (number) {
case 2: return '#eee4da'; break;
case 4: return '#ede0c8'; break;
case 8: return '#f2b179'; break;
case 16: return '#f59563'; break;
case 32: return '#f67c5f'; break;
case 64: return '#f65e3b'; break;
case 128: return '#edcf72'; break;
case 256: return '#edcc61'; break;
case 512: return '#9c0'; break;
case 1024: return '#33b5e5'; break;
case 2048: return '#09c'; break;
case 4096: return '#a6c'; break;
case 8192: return '#93c'; break;
}
return 'black';
}
//获得相应数字的颜色
function get_number_color(number) {
if (number <= 4)
return '#776e65';
return 'white';
}
//判断棋盘上是否还有空格子
function nospace(board) {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
if (board[i][j] == 0) {
return false;
}
}
}
return true;
}
//在showanimation.js中
//动画显示数字格子
function show_number_with_animation(i, j, rand_number) {
var number_cell = $('#number_cell_' + i + '_' + j);
number_cell.css('background-color', get_number_background_color(rand_number));
number_cell.css('color', get_number_color(rand_number));
number_cell.text(rand_number);
number_cell.animate({
width: cell_side_length,
height: cell_side_length,
top: get_pos_top(i, j),
left: get_pos_left(i, j)
}, 50);
}
//更新分数
function update_score(score) {
$('#score').text(score);
}
上面我们完成了布局和初始化，最后我们就要实现让它能移动，并能够消除，直至游戏成功或失败：
//在main.js中加入
//监听键盘的上下左右移动
$(document).keydown(function(event) {
if ($('#score').text() == success_string) {
new_game();
return;
}
switch (event.keyCode) {
case 37: //left
event.preventDefault();
if (move_left()) {
setTimeout('generate_one_number()', 210);
setTimeout('is_gameover()', 300);
}
break;
case 38: //up
event.preventDefault();
if (move_up()) {
setTimeout('generate_one_number()', 210);
setTimeout('is_gameover()', 300);
}
break;
case 39: //right
event.preventDefault();
if (move_right()) {
setTimeout('generate_one_number()', 210);
setTimeout('is_gameover()', 300);
}
break;
case 40: //down
event.preventDefault();
if (move_down()) {
setTimeout('generate_one_number()', 210);
setTimeout('is_gameover()', 300);
}
break;
default:
break;
}
});
//监听移动设备的触摸开始
document.addEventListener('touchstart', function(event) {
startx = event.touches[0].pageX;
starty = event.touches[0].pageY;
});
//监听移动设备的触摸移动
document.addEventListener('touchmove', function(event) {
event.preventDefault();
});
//监听移动设备的触摸结束
document.addEventListener('touchend', function(event) {
endx = event.changedTouches[0].pageX;
endy = event.changedTouches[0].pageY;
var deltax = endx - startx;
var deltay = endy - starty;
if (Math.abs(deltax) < 0.3 * document_width && Math.abs(deltay) < 0.3 * document_width) {
return;
}
if ($('#score').text() == success_string) {
new_game();
return;
}
//x
if (Math.abs(deltax) >= Math.abs(deltay)) {
if (deltax > 0) {
//move right
if (move_right()) {
setTimeout('generate_one_number()', 210);
setTimeout('is_gameover()', 300);
}
} else {
//move left
if (move_left()) {
setTimeout('generate_one_number()', 210);
setTimeout('is_gameover()', 300);
}
}
} else { //y
if (deltay > 0) {
//move down
if (move_down()) {
setTimeout('generate_one_number()', 210);
setTimeout('is_gameover()', 300);
}
} else {
//move up
if (move_up()) {
setTimeout('generate_one_number()', 210);
setTimeout('is_gameover()', 300);
}
}
}
});
//向左移动
function move_left() {
if (!can_move_left(board)) {
return false;
}
//move left
for (var i = 0; i < 4; i++) {
for (var j = 1; j < 4; j++) {
if (board[i][j] != 0) {
for (var k = 0; k < j; k++) {
if (board[i][k] == 0 && no_block_horizontal(i, k, j, board)) {
show_move_animation(i, j, i, k);
board[i][k] = board[i][j];
board[i][j] = 0;
break;
} else if (board[i][k] == board[i][j] && no_block_horizontal(i, k, j, board) && !has_conflicted[i][k]) {
show_move_animation(i, j, i, k);
board[i][k] += board[i][j]
board[i][j] = 0;
//add score
score += board[i][k];
update_score(score);
has_conflicted[i][k] = true;
break;
}
}
}
}
}
setTimeout('update_board_view()', 200);
return true;
}
//向右移动
function move_right() {
if (!can_move_right(board)) {
return false;
}
//move right
for (var i = 0; i < 4; i++) {
for (var j = 2; j >= 0; j--) {
if (board[i][j] != 0) {
for (var k = 3; k > j; k--) {
if (board[i][k] == 0 && no_block_horizontal(i, j, k, board)) {
show_move_animation(i, j, i, k);
board[i][k] = board[i][j];
board[i][j] = 0;
break;
} else if (board[i][k] == board[i][j] && no_block_horizontal(i, j, k, board) && !has_conflicted[i][k]) {
show_move_animation(i, j, i, k);
board[i][k] += board[i][j];
board[i][j] = 0;
//add score
score += board[i][k];
update_score(score);
has_conflicted[i][k] = true;
break;
}
}
}
}
}
setTimeout('update_board_view()', 200);
return true;
}
//向上移动
function move_up() {
if (!can_move_up(board)) {
return false;
}
//move up
for (var j = 0; j < 4; j++) {
for (var i = 1; i < 4; i++) {
if (board[i][j] != 0) {
for (var k = 0; k < i; k++) {
if (board[k][j] == 0 && no_block_vertical(j, k, i, board)) {
show_move_animation(i, j, k, j);
board[k][j] = board[i][j];
board[i][j] = 0;
break;
} else if (board[k][j] == board[i][j] && no_block_vertical(j, k, i, board) && !has_conflicted[k][j]) {
show_move_animation(i, j, k, j);
board[k][j] += board[i][j];
board[i][j] = 0;
//add score
score += board[k][j];
update_score(score);
has_conflicted[k][j] = true;
break;
}
}
}
}
}
setTimeout('update_board_view()', 200);
return true;
}
//向下移动
function move_down() {
if (!can_move_down(board)) {
return false;
}
//move down
for (var j = 0; j < 4; j++) {
for (var i = 2; i >= 0; i--) {
if (board[i][j] != 0) {
for (var k = 3; k > i; k--) {
if (board[k][j] == 0 && no_block_vertical(j, i, k, board)) {
show_move_animation(i, j, k, j);
board[k][j] = board[i][j];
board[i][j] = 0;
break;
} else if (board[k][j] == board[i][j] && no_block_vertical(j, i, k, board) && !has_conflicted[k][j]) {
show_move_animation(i, j, k, j);
board[k][j] += board[i][j];
board[i][j] = 0;
//add score
score += board[k][j];
update_score(score);
has_conflicted[k][j] = true;
break;
}
}
}
}
}
setTimeout('update_board_view()', 200);
return true;
}
//判断游戏成功或失败
function is_gameover() {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
if (board[i][j] == 2048) {
update_score(success_string);
return;
}
}
}
if (nospace(board) && nomove(board)) {
gameover();
}
}
//游戏结束时更新游戏失败的文字
function gameover() {
update_score(gameover_string);
}
//在support.js中加入
//判断是否能向左移动
function can_move_left(board) {
for (var i = 0; i < 4; i++) {
for (var j = 1; j < 4; j++) {
if (board[i][j] != 0) {
if (board[i][j - 1] == 0 || board[i][j] == board[i][j - 1]) {
return true;
}
}
}
}
return false;
}
//判断是否能向右移动
function can_move_right(board) {
for (var i = 0; i < 4; i++) {
for (var j = 2; j >= 0; j--) {
if (board[i][j] != 0) {
if (board[i][j + 1] == 0 || board[i][j] == board[i][j + 1]) {
return true;
}
}
}
}
return false;
}
//判断是否能向上移动
function can_move_up(board) {
for (var j = 0; j < 4; j++) {
for (var i = 1; i < 4; i++) {
if (board[i][j] != 0) {
if (board[i - 1][j] == 0 || board[i - 1][j] == board[i][j]) {
return true;
}
}
}
}
return false;
}
//判断是否能向下移动
function can_move_down(board) {
for (var j = 0; j < 4; j++) {
for (var i = 2; i >= 0; i--) {
if (board[i][j] != 0) {
if (board[i + 1][j] == 0 || board[i + 1][j] == board[i][j]) {
return true;
}
}
}
}
return false;
}
//判断水平方向上时候是否有空格子
function no_block_horizontal(row, col1, col2, board) {
for (var i = col1 + 1; i < col2; i++) {
if (board[row][i] != 0) {
return false;
}
}
return true;
}
//判断垂直方向上时候是否有空格子
function no_block_vertical(col, row1, row2, board) {
for (var i = row1 + 1; i < row2; i++) {
if (board[i][col] != 0) {
return false;
}
}
return true;
}
//判断是否还能移动
function nomove(board) {
if (can_move_down(board) || can_move_up(board) || can_move_right(board) || can_move_left(board)) {
return false;
}
return true;
}
//在showanimation.js中加入
//格子移动时有动画效果
function show_move_animation(fromx, fromy, tox, toy) {
var number_cell = $('#number_cell_' + fromx + '_' + fromy);
number_cell.animate({
top: get_pos_top(tox, toy),
left: get_pos_left(tox, toy)
}, 200);
}
到此我们的网页版2048就完成了。