<!DOCTYPE html>
<html lang="zh">
<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></title>
</head>
<body>
<canvas id="canvas" style="width:500px;">當前瀏覽器不支持canvas，請更換瀏覽器後再試</canvas>
<script src="http://files.cnblogs.com/files/xiaohuochai/digit.js"></script>
<script>
var canvas = document.getElementById('canvas');
if(canvas.getContext){
var cxt = canvas.getContext('2d');
//聲明canvas的寬高
var H = 100,W = 700;
canvas.height = H;
canvas.width = W;
//存儲時間數據
var data = [];
//存儲運動的小球
var balls = [];
//設置粒子半徑
var R = canvas.height/20-1;
(function(){
var temp = /(\d)(\d):(\d)(\d):(\d)(\d)/.exec(new Date());
//存儲時間數字，由十位小時、個位小時、冒號、十位分鐘、個位分鐘、冒號、十位秒鐘、個位秒鐘這7個數字組成
data.push(temp[1],temp[2],10,temp[3],temp[4],10,temp[5],temp[6]);
})();
/*生成點陣數字*/
function renderDigit(index,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){
cxt.beginPath();
cxt.arc(14*(R+2)*index + j*2*(R+1)+(R+1),i*2*(R+1)+(R+1),R,0,2*Math.PI);
cxt.closePath();
cxt.fill();
}
}
}
}
/*更新時鐘*/
function updateDigitTime(){
var changeNumArray = [];
var temp = /(\d)(\d):(\d)(\d):(\d)(\d)/.exec(new Date());
var NewData = [];
NewData.push(temp[1],temp[2],10,temp[3],temp[4],10,temp[5],temp[6]);
for(var i = data.length-1; i >=0 ; i--){
//時間發生變化
if(NewData[i] !== data[i]){
//將變化的數字值和在data數組中的索引存儲在changeNumArray數組中
console.log(i,data[i],(Number(data[i])+1)%10);
changeNumArray.push(i+'_'+(Number(data[i])+1)%10);
}
}
//增加小球
for(var i = 0; i< changeNumArray.length; i++){
addBalls.apply(this,changeNumArray[i].split('_'));
}
data = NewData.concat();
}
/*更新小球狀態*/
function updateBalls(){
for(var i = 0; i < balls.length; i++){
balls[i].stepY += balls[i].disY;
balls[i].x += balls[i].stepX;
balls[i].y += balls[i].stepY;
if(balls[i].x > W + R || balls[i].y > H + R){
balls.splice(i,1);
i--;
}
}
}
/*增加要運動的小球*/
function addBalls(index,num){
var numArray = [1,2,3];
var colorArray = ["#3BE","#09C","#A6C","#93C","#9C0","#690","#FB3","#F80","#F44","#C00"];
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 ball = {
x:14*(R+2)*index + j*2*(R+1)+(R+1),
y:i*2*(R+1)+(R+1),
stepX:Math.floor(Math.random() * 4 -2),
stepY:-2*numArray[Math.floor(Math.random()*numArray.length)],
color:colorArray[Math.floor(Math.random()*colorArray.length)],
disY:1
};
balls.push(ball);
}
}
}
}
/*渲染*/
function render(){
//重置畫布寬度，達到清空畫布的效果
canvas.height = 100;
//渲染時鐘
for(var i = 0; i < data.length; i++){
renderDigit(i,data[i]);
}
//渲染小球
for(var i = 0; i < balls.length; i++){
cxt.beginPath();
cxt.arc(balls[i].x,balls[i].y,R,0,2*Math.PI);
cxt.fillStyle = balls[i].color;
cxt.closePath();
cxt.fill();
}
}
clearInterval(oTimer);
var oTimer = setInterval(function(){
//更新時鐘
updateDigitTime();
//更新小球狀態
updateBalls();
//渲染
render();
},50);
}
</script>
</body>
</html>
digit.js
var 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],
[0,0,1,1,1,0,0],
[0,0,1,1,1,0,0],
[0,0,1,1,1,0,0],
[0,0,0,0,0,0,0],
[0,0,0,0,0,0,0],
[0,0,1,1,1,0,0],
[0,0,1,1,1,0,0],
[0,0,1,1,1,0,0],
[0,0,0,0,0,0,0]
]//:
];