<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.map {
width: 800px;
height: 600px;
position: relative;
background-color: #ccc;
margin: 50px auto;
}
</style>
</head>
<body>
<div class="map"></div>
<script>
// 食物
(function () {
var elements = [];
function Food(x, y, width, height, color) {
this.x = x;
this.y = y;;
this.width = width || 20;
this.height = height || 20;
this.color = color || "blue";
};
//暴露Food
window.Food = Food;
// 原型初始化
Food.prototype.init = function (map) {
// 添加食物
remove();
var div = document.createElement("div");
map.appendChild(div);
div.style.width = this.width + 'px';
div.style.height = this.height + 'px';
div.style.backgroundColor = this.color;
div.style.position = 'absolute';
// 随机横纵坐标
this.x = parseInt(Math.random() * (map.offsetWidth / this.width)) * this.width;
this.y = parseInt(Math.random() * (map.offsetHeight / this.height)) * this.height;
div.style.left = this.x + 'px';
div.style.top = this.y + 'px';
// div.style.color = this.color;
elements.push(div);
}
remove();
// 删除食物
function remove() {
for (var i = 0; i < elements.length; i++) {
var ele = elements[i];
ele.parentNode.removeChild(ele);
elements.splice(i, 1);
}
}
}());
// 小蛇的自调用函数
(function () {
// 存放小蛇的身体
var elements = [];
function Snake(width, height, direction) {
this.width = width || 20;
this.height = height || 20;
// this.backgroundColor = color|| 'red';
this.body = [
{
x: 3, y: 2, color: 'red' },
{
x: 2, y: 2, color: 'orange' },
{
x: 1, y: 2, color: 'orange' }
];
this.direction = direction || 'right';
}
Snake.prototype.init = function (map) {
remove();
for (var i = 0; i < this.body.length; i++) {
// 每个元素都是一个对象
var obj = this.body[i];
var div = document.createElement('div');
map.appendChild(div);
// 设置div样式
div.style.position = 'absolute';
div.style.width = this.width + 'px';
div.style.height = this.height + 'px';
div.style.left = obj.x * this.width + 'px';
div.style.top = obj.y * this.height + 'px';
div.style.backgroundColor = obj.color;
elements.push(div);
// 暴露对象
};
};
Snake.prototype.move = function (food, map) {
var i = this.body.length - 1;
for (; i > 0; i--) {
this.body[i].x = this.body[i - 1].x;
this.body[i].y = this.body[i - 1].y;
}
switch (this.direction) {
case 'right':
this.body[0].x += 1;
break;
case 'left':
this.body[0].x -= 1;
break;
case 'top':
this.body[0].y -= 1;
break;
case 'bottom':
this.body[0].y += 1;
break;
};
var headX = this.body[0].x*this.width;
var headY = this.body[0].y*this.height;
if(headX==food.x&&headY==food.y){
var last = this.body[this.body.length-1];
this.body.push({
x:last.x,
y:last.y,
color:last.color
});
food.init(map);
}
}
function remove() {
var i = elements.length - 1;
for (; i >= 0; i--) {
// 先找到父元素,再删除子元素
var ele = elements[i];
ele.parentNode.removeChild(ele);
elements.splice(i, 1);
}
}
window.Snake = Snake;
}());
// 自调用函数对象
(function () {
var that = null;
function Game(map) {
this.food = new Food();
this.snake = new Snake();
this.map =map;
that = this;
}
Game.prototype.init = function () {
this.food.init(this.map);
this.snake.init(this.map);
this.runSnake(this.food,this.map)
this.bindKey();
};
// 添加原型方法
Game.prototype.runSnake =function(food,map){
var timer = setInterval(function(){
this.snake.move(food,map);
this.snake.init(map);
var maxX = map.offsetWidth/this.snake.width;
var maxY = map.offsetHeight/this.snake.height;
var headX = this.snake.body[0].x;
var headY = this.snake.body[0].y;
if(headX<0||headX>=40){
clearInterval(timer);
alert('游戏结束');
}
if(headY<0||headY>=30){
clearInterval(timer);
alert('游戏结束');
}
}.bind(that),150)
}
Game.prototype.bindKey =function(){
document.addEventListener('keydown',function(e){
switch (e.keyCode){
case 37:this.snake.direction ="left";break;
case 38:this.snake.direction ="top";break;
case 39:this.snake.direction ="right";break;
case 40:this.snake.direction ="bottom";break;
}
}.bind(that),false)
}
window.Game = Game;
}());
var gm = new Game(document.querySelector('.map'));
gm.init();
</script>
</body>
</html>
Concepto de diseño de serpiente
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Origin blog.csdn.net/weixin_45176415/article/details/104854634
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