计时器问题
时间最后一位是0的时候时间就不动了呢
坏骇芓
2016-03-08
2 回答
/**
* Created by 赵芳 on 2016/3/6.
*/
var WINDOW_WIDTH=1024;
var WINDOW_HEIGHT=768;
var RADIUS=8;
var MARGIN_TOP=60;
var MARGIN_LEFT=30;
const endTime=new Date(2016,2,9,22,14);
var curShowTimeSeconds=0;
var balls=[];
const colors=["#FFDEAD","#00868B","#696969","#191970","#00FF00","#4169E1","#008B00","#FFF68F","#E0FFFF","#228B22"];
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)){
addBolls(MARGIN_LEFT+0,MARGIN_TOP,parseInt(curhours/10));
}
if(parseInt(curhours%10)!=parseInt(nexthours%10)){
addBolls(MARGIN_LEFT+15*(RADIUS+1),MARGIN_TOP,parseInt(curhours%10));
}
if(parseInt(curminutes/10)!=parseInt(nextminutes/10)){
addBolls(MARGIN_LEFT+39*(RADIUS+1),MARGIN_TOP,parseInt(curminutes/10));
}
if(parseInt(curminutes%10)!=parseInt(nextminutes%10)){
addBolls(MARGIN_LEFT+54*(RADIUS+1),MARGIN_TOP,parseInt(curminutes%10));
}
if(parseInt(curseconds/10)!=parseInt(nextseconds/10)){
addBolls(MARGIN_LEFT+78*(RADIUS+1),MARGIN_TOP,parseInt(curseconds/10));
}
if(parseInt(curminutes%10)!=parseInt(nextminutes%10)){
addBolls(MARGIN_LEFT+93*(RADIUS+1),MARGIN_TOP,parseInt(curseconds%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,
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_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].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();
}
}
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