为什么这样子不对呢？ <script src="js/digit.js"></script> 是下载老师的 视频连接地址http://www.imooc.com/video/2457
<!DOCTYPE html>
<html>
<head>
<meta charset="utf8">
<title>asdasd</title>
</head>
<body>
<canvas id="canvas" style="border: 1px solid #aaa;display: block;margin:50px auto;">当前浏览器不支持HTML5</canvas>
<script src="js/digit.js"></script>
<script src="js/countdown.js"></script>
</body>
</html>var WINDOW_WIDTH = 1024;
var WINDOW_HEIGHT = 768;
var RADIUS = 8;
var MARGIN_TOP = 60;
var MARGIN_LEFT = 30;
const endTime = new Date("2016/6/7,18:55:10");
var curShowTimeSeconds = 0
var balls = [];
const colors = ["#33B5E5","#0099CC","#AA66cc","#9933CC","#669900","#FFBB33","#FF8800","#FF4444","#CC0000"]
window.onload = function(){
var canvas = document.getElementById('canvas');
var context= canvas.getContext('2d');
canvas.width = WINDOW_WIDTH;
canvas.height= WINDOW_HEIGHT;
curShowTimeSeconds = getCurrentShowTimeSeconds();
setInterval(
function(){
render( context );
update();
}
,
50
);
}
function getCurrentShowTimeSeconds(){
var curTime = new Date();
var ret = endTime.getTime() - curTime.getTime();
ret = Math.round(ret / 1000)
return ret >= 0 ? ret : 0;
}
function update(){
var nextShowTimeSeconds = getCurrentShowTimeSeconds();
var nextHours = parseInt(curShowTimeSeconds / 3600);
var nextMinutes= parseInt( (curShowTimeSeconds - nextHours*3600 ) / 60);
var nextSeconds = nextShowTimeSeconds % 60;
var curHours = parseInt(curShowTimeSeconds / 3600);
var curMinutes= parseInt( (curShowTimeSeconds - curHours*3600 ) / 60);
var curSeconds = curShowTimeSeconds % 60;
if(nextSeconds != curSeconds){
if( parseInt(curHours/10) != parseInt(nextHours/10)){
addBalls(MARGIN_LEFT + 0,MARGIN_TOP,parseInt(curHours/10))
}
if( parseInt(curHours%10) != parseInt(nextHours%10)){
addBalls(MARGIN_LEFT + 15*(RADIUS+1),MARGIN_TOP,parseInt(curHours/10))
}
if( parseInt(curMinutes/10) != parseInt(nextHours/10)){
addBalls(MARGIN_LEFT + 39*(RADIUS+1),MARGIN_TOP,parseInt(curMinutes/10))
}
if( parseInt(curMinutes%10) != parseInt(nextHours%10)){
addBalls(MARGIN_LEFT + 54*(RADIUS+1),MARGIN_TOP,parseInt(curMinutes%10))
}
if( parseInt(curSeconds/10) != parseInt(curSeconds/10)){
addBalls(MARGIN_LEFT + 78*(RADIUS+1),MARGIN_TOP,parseInt(curHours/10))
}
if( parseInt(curSeconds%10) != parseInt(nextHours%10)){
addBalls(MARGIN_LEFT+93*(RADIUS+1),MARGIN_TOP,parseInt(nextSeconds%10))
}
curShowTimeSeconds = nextShowTimeSeconds;
}
updateBalls();
}
function updateBalls(){
for(var i=0;i<balls.length;i++){
balls[i].x+= balls[i].vx;
balls[i].y+= balls[i].vy;
balls[i].vy+= balls[i].g;
}
if( balls[i].y >= WINDOW_HEIGHT-RADIUS){
balls[i].y = WINDOW_HEIGHT-RADIUS;
balls[i].vy = - balls[i].vy*0.75;
}
}
function addBalls(x,y,num){
for(var i=0;i<digit[num].length;i++){
for(var j=0;j<digit[num].length;j++){
if(digit[num][i][j] == 1){
var aBall = {
x:x+j*2*(RADIUS+1)+(RADIUS+1),
y:y+i*2*(RADIUS+1)+(RADIUS+1),
g:1.5+Math.random(),
vx:Math.pow(-1,Math.ceil(Math.random()*1000) ) * 4,
vy:-5,
color:colors[Math.floor(Math.random()*colors.length)]
}
balls.push(aBall)
}
}
}
}
function render(cxt){
cxt.clearRect(0,0,WINDOW_WIDTH,WINDOW_HEIGHT);
var hours = parseInt(curShowTimeSeconds / 3600);
var minutes= parseInt( (curShowTimeSeconds - hours*3600 ) / 60);
var seconds = curShowTimeSeconds % 60;
renderDigit(MARGIN_TOP,MARGIN_LEFT,parseInt(hours/10),cxt);
renderDigit(MARGIN_LEFT+18*(RADIUS+1),MARGIN_TOP-30,parseInt(hours%10),cxt);
renderDigit(MARGIN_LEFT+31*(RADIUS+1),MARGIN_TOP-30,10,cxt);
renderDigit(MARGIN_LEFT+39*(RADIUS+1),MARGIN_TOP-30,parseInt(minutes/10),cxt);
renderDigit(MARGIN_LEFT+54*(RADIUS+1),MARGIN_TOP-30,parseInt(minutes%10),cxt);
renderDigit(MARGIN_LEFT+69*(RADIUS+1),MARGIN_TOP-30,10,cxt);
renderDigit(MARGIN_LEFT+78*(RADIUS+1),MARGIN_TOP-30,parseInt(seconds/10),cxt);
renderDigit(MARGIN_LEFT+93*(RADIUS+1),MARGIN_TOP-30,parseInt(seconds%10),cxt);
for(var i=0;i<balls.length;i++){
cxt.fillStyle = balls[i].color;
cxt.beginPath()
cxt.arc(balls[i].x,balls[i].y,RADIUS, 0 , 2*Math.PI,ture)
cxt.colosePath()
cxt.fill()
}
}
function renderDigit(x,y,num,cxt){
cxt.fillStyle = "rgb(0,102,153)";
for(var i=0;i<digit[num].length;i++){
for(var j=0;j<digit[num][i].length;j++){
if(digit[num][i][j]==1){
cxt.beginPath();
cxt.arc( x+j*2*(RADIUS+1)+(RADIUS+1) , y+i*2*(RADIUS+1)+(RADIUS+1) , RADIUS,0,2*Math.PI);
cxt.closePath() //fengbi
cxt.fill()
}
}
}
}
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