为什么按着老师的代码打的,运行不报错,只倒计时,其他的什么特效都没显示啊,找了好久原因没找到
var WINDOW_WIDTH = 1024;
var WINDOW_HEIGHT = 768;
var RADIUS = 8;
var MARGIN_TOP = 60;
var MARGIN_LEFT = 30;
const endTime = new Date(2016,11,9,18,47,52);
var curShowTimeSeconds = 0
var balls=[];
const colors=['#33B5E5','#0099CC','#AA66CC','#9933CC','#99CC00','#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( nextShowTimeSeconds / 3600);
var nextMinutes = parseInt( (nextShowTimeSeconds - 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(nextMinutes/10)){
addBalls(MARGIN_LEFT+39*(RADIUS+1),MARGIN_TOP,parseInt(curMinutes/10));
}
if(parseInt(curMinutes%10) != parseInt(nextMinutes%10)){
addBalls(MARGIN_LEFT+54*(RADIUS+1),MARGIN_TOP,parseInt(curMinutes%10));
}
if(parseInt(curSeconds/10) != parseInt(nextSeconds/10)){
addBalls(MARGIN_LEFT+78*(RADIUS+1),MARGIN_TOP,parseInt(curSeconds/10));
}
if(parseInt(curSeconds%10) != parseInt(nextSeconds%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][i].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,
vx:-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_LEFT , MARGIN_TOP , parseInt(hours%10) , cxt )
renderDigit( MARGIN_LEFT + 15*(RADIUS+1) , MARGIN_TOP , parseInt(hours%10) , cxt )
renderDigit( MARGIN_LEFT + 30*(RADIUS + 1) , MARGIN_TOP , 10 , cxt )
renderDigit( MARGIN_LEFT + 39*(RADIUS+1) , MARGIN_TOP , parseInt(minutes/10) , cxt);
renderDigit( MARGIN_LEFT + 54*(RADIUS+1) , MARGIN_TOP , parseInt(minutes%10) , cxt);
renderDigit( MARGIN_LEFT + 69*(RADIUS+1) , MARGIN_TOP , 10 , cxt);
renderDigit( MARGIN_LEFT + 78*(RADIUS+1) , MARGIN_TOP , parseInt(seconds/10) , cxt);
renderDigit( MARGIN_LEFT + 93*(RADIUS+1) , MARGIN_TOP , 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,true);
cxt.closePath();
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()
cxt.fill()
}
}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body style="height:100%">
<canvas id="canvas" style="height:100%">
当前浏览器不支持Canvas，请更换浏览器后再试
</canvas>
</body>
<script src="digit.js"></script>
<script src="countdown.js"></script>
</html>
digit =
[
[
[0,0,1,1,1,0,0],
[0,1,1,0,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,0,1,1,0],
[0,0,1,1,1,0,0]
],//0
[
[0,0,0,1,1,0,0],
[0,1,1,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[1,1,1,1,1,1,1]
],//1
[
[0,1,1,1,1,1,0],
[1,1,0,0,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,1,1,0],
[0,0,0,1,1,0,0],
[0,0,1,1,0,0,0],
[0,1,1,0,0,0,0],
[1,1,0,0,0,0,0],
[1,1,0,0,0,1,1],
[1,1,1,1,1,1,1]
],//2
[
[1,1,1,1,1,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,1,1,0],
[0,0,0,1,1,0,0],
[0,0,1,1,1,0,0],
[0,0,0,0,1,1,0],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0]
],//3
[
[0,0,0,0,1,1,0],
[0,0,0,1,1,1,0],
[0,0,1,1,1,1,0],
[0,1,1,0,1,1,0],
[1,1,0,0,1,1,0],
[1,1,1,1,1,1,1],
[0,0,0,0,1,1,0],
[0,0,0,0,1,1,0],
[0,0,0,0,1,1,0],
[0,0,0,1,1,1,1]
],//4
[
[1,1,1,1,1,1,1],
[1,1,0,0,0,0,0],
[1,1,0,0,0,0,0],
[1,1,1,1,1,1,0],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0]
],//5
[
[0,0,0,0,1,1,0],
[0,0,1,1,0,0,0],
[0,1,1,0,0,0,0],
[1,1,0,0,0,0,0],
[1,1,0,1,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0]
],//6
[
[1,1,1,1,1,1,1],
[1,1,0,0,0,1,1],
[0,0,0,0,1,1,0],
[0,0,0,0,1,1,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,1,1,0,0,0],
[0,0,1,1,0,0,0],
[0,0,1,1,0,0,0],
[0,0,1,1,0,0,0]
],//7
[
[0,1,1,1,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0]
],//8
[
[0,1,1,1,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,1,1,0],
[0,0,0,1,1,0,0],
[0,1,1,0,0,0,0]
],//9
[
[0,0,0,0],
[0,0,0,0],
[0,1,1,0],
[0,1,1,0],
[0,0,0,0],
[0,0,0,0],
[0,1,1,0],
[0,1,1,0],
[0,0,0,0],
[0,0,0,0]
]//:
];
