JavaScript写的贪吃蛇
[code]
function cbsnake(){
//Pixels to move at once
this.jump = 8;
//Size of snake. Make this one less than jump. Doesn't have to be,but adds good effect
this.sos = 7;
//Size of board
//DANGER!!! this.sofb must be EVENLY dividable by this.jump DANGER!!!!
this.sofb = 400;
//Set things up
this.daway = this.sofb - this.jump;
this.correct = new Array();
this.correct[0] = 0;
while(this.correct[this.correct.length -1] != this.daway){
this.correct[this.correct.length] = this.correct[this.correct.length -1]+this.jump
}
this.zero = 0;
var gameboard = ' This is a simple game of Snake. Select a speed then use your arrow keys to attempt and eat the apple(red block), but watch out for the walls and yourself. At any time you can pause the game by pressing the space bar.This game is available at Web'>http://www.webtech101.com">Web Tech 101 and Dynamic'>http://www.dynamicdrive.com">Dynamic Drive 0 Slow Medium Fast ';
document.write(gameboard);
}
cbsnake.prototype.setup = function(setspeed){
var thisObj = this;
//Score...
this.score = 0;
//Snake Direction
this.sdir = 'none';
this.sdirb = 'none';
this.sdirp = 'none';
//Snake arrays
this.ctop = new Array();
this.cleft = new Array();
//Top of snake class
this.ctop[0] = 200;
this.ctop[1] = -8;
//Left of Snake class
this.cleft[0] = 200;
this.cleft[1] = -8;
//current top of apple
this.atop = 0;
//current left of apple
this.aleft = 0;
//Milliseconds between move
this.speed = setspeed;
document.getElementById('board').innerHTML = '';
this.moveapple();
this.stopgame = false;
setTimeout(function(){ thisObj.msnake() },this.speed);
document.onkeydown = function(e){ return thisObj.snakedir(e); };
}
cbsnake.prototype.slow = function(){
this.setup(100);
this.buttons('true');
document.getElementById('slow').blur();
}
cbsnake.prototype.medium = function(){
this.setup(70);
this.buttons('true');
document.getElementById('medium').blur();
}
cbsnake.prototype.fast = function(){
this.setup(30);
this.buttons('true');
document.getElementById('fast').blur();
}
cbsnake.prototype.rannum = function(num1,num2){
num1 = parseInt(num1);
num2 = parseInt(num2);
var generator = Math.random()*(Math.abs(num2-num1));
generator = Math.round(num1+generator);
return generator;
}
cbsnake.prototype.moveapple = function(){
var usethis = false;
while(!usethis){
this.atop = this.correct[this.rannum(0,this.correct.length-1)];
this.aleft = this.correct[this.rannum(0,this.correct.length-1)];
if(this.numInArray(this.ctop,this.cleft,this.atop,this.aleft) == 0){
usethis = true;
}
}
document.getElementById('apple').style.top = this.atop+"px";
document.getElementById('apple').style.left = this.aleft+"px";
}
cbsnake.prototype.snakedir = function(e){
if(!e){
//IE...
e = window.event;
}
switch(e.keyCode){
case 38:
if(this.sdir != 'down' && this.sdirp != 'down'){
this.sdirb = 'up';
this.sdirp = 'up';
}
break;
case 40:
if(this.sdir != 'up' && this.sdirp != 'up'){
this.sdirb = 'down';
this.sdirp = 'down';
}
break;
case 37:
if(this.sdir != 'right' && this.sdirp != 'right'){
this.sdirb = 'left';
this.sdirp = 'left';
}
break;
case 39:
if(this.sdir != 'left' && this.sdirp != 'left'){
this.sdirb = 'right';
this.sdirp = 'right';
}
break;
case 32:
if(this.sdir == 'none' && this.sdirp != 'none'){
this.sdirb = this.sdirp;
this.sdirp = 'none';
}
else{
this.sdirp = this.sdir;
this.sdirb = 'none';
}
break;
}
return this.stopgame;
}
cbsnake.prototype.msnake = function(){
if(this.stopgame === false){
if(this.sdir != 'none'){
this.moveall();
}
var thisObj = this;
switch(this.sdir){
case 'up':
this.ctop[0] = this.ctop[0] - this.jump;
document.getElementById('snake0').style.top = this.ctop[0]+"px";
if((this.ctop[0] == this.zero && this.sdirb == 'up') || this.ctop[0] this.daway){
this.gover();
}
break;
case 'left':
this.cleft[0] = this.cleft[0] - this.jump;
document.getElementById('snake0').style.left = this.cleft[0]+"px";
if((this.cleft[0] == this.zero && this.sdirb == 'left') || this.cleft[0] this.daway){
this.gover();
}
break;
}
if(this.sdir != 'none'){
this.hitself();
this.happle();
}
this.sdir = this.sdirb
setTimeout(function(){ thisObj.msnake() },this.speed);
}
}
cbsnake.prototype.gover = function(){
if(!this.stopgame){
this.stopgame = true;
var inner = document.getElementById('board').innerHTML;
document.getElementById('board').innerHTML = inner+'Game Over! Your Score was '+this.score+'This is a simple game of Snake. Select a speed then use your arrow keys to attempt and eat the apple(red block), but watch out for the walls and yourself. At any time you can pause the game by pressing the space bar.This game is available at Web'>http://www.webtech101.com">Web Tech 101 and Dynamic'>http://www.dynamicdrive.com">Dynamic Drive';
document.getElementById('apple').style.backgroundColor = '#D7BEBE';
for(i=0;i 1){
this.gover();
}
}
cbsnake.prototype.buttons = function(setto){
document.getElementById('slow').disabled = setto;
document.getElementById('medium').disabled = setto;
document.getElementById('fast').disabled = setto;
}
.board{
width: 399px;
background-color: lightgrey;
border: 1px solid gray;
position: relative;
margin-left: 0;
margin-top: 0;
}
#board{
height: 399px;
border-bottom: 0px;
}
#apple{
position: absolute;
background-color: red;
height: 7px;
width: 7px;
overflow: hidden;
}
.snake{
position: absolute;
top: 200px;
left: 200px;
background-color: black;
height: 7px;
width: 7px;
overflow: hidden;
}
.snake2{
position: absolute;
top: -10px;
left: -10px;
background-color: black;
height: 7px;
width: 7px;
overflow: hidden;
}
#score{
height: 50px;
margin-top: 0px;
}
#cscore{
color: black;
padding-left: 10px;
float: left;
width: 25%;
font-size: xx-large;
}
#buttons{
float: right;
width: 50%;
text-align: right;
padding-top: 10px;
}
#notice{
position: absolute;
top: 1em;
left: 1em;
right: 1em;
text-align: center;
font-size: 150%;
}
#i2{
position: absolute;
bottom: 1em;
left: 1em;
right: 1em;
text-align: center;
font-size: 95%;
}
var snake = new cbsnake();
[/code] |