Javascript学习--时间
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]
],//
[
[0,0,0,1,1,0,0],
[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]
],//
[
[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]
],//
[
[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]
],//
[
[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]
],//
[
[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]
],//
[
[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]
],//
[
[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]
],//
[
[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]
],//
[
[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]
],//
[
[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]
]//:
];
var canvasWidth = document.documentElement.clientWidth - 20,
canvasHeight = document.documentElement.clientHeight - 20,
r = Math.round(canvasWidth * (4 / 5) / 108) - 1,
marginTop = Math.round(canvasHeight / 5),
marginLeft = Math.round(canvasWidth / 10); var curtimeSeconds = getcurtimeSeconds();
var balls = [];
var colors = ['#33b5be', '#0099cc', '#aa66cc', '#9933cc', '#99cc00', '#669900', '#ffbb33', '#ff8800', '#ff4444', '#cc0000'];
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
canvas.width = canvasWidth;
canvas.height = canvasHeight;
//获取截止时间与当前时间的秒数
function getcurtimeSeconds() {
var curTime = new Date();
//时钟
var betweenTime = curTime.getHours() * 3600 + curTime.getMinutes() * 60 + curTime.getSeconds();
return betweenTime;
} function renderDigit(x, y, num, ctx) {
ctx.fillStyle = 'orange';
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) {
ctx.beginPath();
ctx.arc(x + j * 2 * (r + 1) + (r + 1), y + i * 2 * (r + 1) + (r + 1), r, 0, 2 * Math.PI);
ctx.fill();
}
}
}
} function renderM(ctx) {
renderDigit(marginLeft + 30 * (r + 1), marginTop, 10, ctx);
renderDigit(marginLeft + 69 * (r + 1), marginTop, 10, ctx);
}
//闪烁的冒号
function bilibili(ctx) {
var nowTime = new Date();
var nowString = nowTime.getTime().toString();
var cutTime = nowString.substr(-4);
var nowSeconds = parseInt(cutTime);
// console.log(nowSeconds);
if(Math.round(nowSeconds / 1000) === Math.floor(nowSeconds / 1000)) {
renderM(ctx);
}
} 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;
//碰撞检测
if(balls[i].y >= canvasHeight - r) {
balls[i].y = canvasHeight - r;
balls[i].vy = -balls[i].vy * 0.8; }
}
//删除画布外的球，提高性能
var count = 0;
for(var i = 0; i < balls.length; i++) {
if(balls[i].x + r > 0 && balls[i].x - r < canvasWidth) {
balls[count++] = balls[i];
}
}
while(balls.length > count) {
balls.pop();
}
} 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 * (r + 1) + (r + 1),
y: y + i * 2 * (r + 1) + (r + 1),
g: 1.5 + Math.random(), //重力加速度
vx: Math.pow(-1, Math.ceil(Math.random() * 1000)) * 3,
vy: -5,
color: colors[Math.floor(Math.random() * colors.length)]
}
balls.push(aBall);
}
}
}
} function render(ctx) {
ctx.clearRect(0, 0, canvasWidth, canvasHeight);
var hours = parseInt(curtimeSeconds / 3600),
minutes = parseInt((curtimeSeconds - hours * 3600) / 60),
seconds = curtimeSeconds % 60;
renderDigit(marginLeft, marginTop, parseInt(hours / 10), ctx);
renderDigit(marginLeft + 15 * (r + 1), marginTop, parseInt(hours % 10), ctx); renderDigit(marginLeft + 39 * (r + 1), marginTop, parseInt(minutes / 10), ctx);
renderDigit(marginLeft + 54 * (r + 1), marginTop, parseInt(minutes % 10), ctx); renderDigit(marginLeft + 78 * (r + 1), marginTop, parseInt(seconds / 10), ctx);
renderDigit(marginLeft + 93 * (r + 1), marginTop, parseInt(seconds % 10), ctx); //绘制掉落的小球
for(var i = 0; i < balls.length; i++) {
ctx.fillStyle = balls[i].color;
ctx.beginPath();
ctx.arc(balls[i].x, balls[i].y, r, 0, 2 * Math.PI);
ctx.closePath();
ctx.fill();
}
}
//更新时间，为小球掉落运动做准备
function update() {
var nexttimeSeconds = getcurtimeSeconds();
var nextHours = parseInt(nexttimeSeconds / 3600),
nextMinutes = parseInt((nexttimeSeconds - nextHours * 3600) / 60),
nextSeconds = nexttimeSeconds % 60;
var curHours = parseInt(curtimeSeconds / 3600),
curMinutes = parseInt((curtimeSeconds - curHours * 3600) / 60),
curSeconds = curtimeSeconds % 60; if(nextSeconds != curSeconds) {
//小时
if(parseInt(curHours / 10) != parseInt(nextHours / 10)) {
addBalls(marginLeft, marginTop, parseInt(curHours / 10));
}
if(parseInt(curHours % 10) != parseInt(nextHours % 10)) {
addBalls(marginLeft + 15 * (r + 1), marginTop, parseInt(curHours / 10));
}
//分
if(parseInt(curMinutes / 10) != parseInt(nextMinutes / 10)) {
addBalls(marginLeft + 39 * (r + 1), marginTop, parseInt(curMinutes % 10));
}
if(parseInt(curMinutes % 10) != parseInt(nextMinutes % 10)) {
addBalls(marginLeft + 54 * (r + 1), marginTop, parseInt(curMinutes % 10));
}
//秒
if(parseInt(curSeconds / 10) != parseInt(nextSeconds / 10)) {
addBalls(marginLeft + 78 * (r + 1), marginTop, parseInt(curSeconds / 10));
}
if(parseInt(curSeconds % 10) != parseInt(nextSeconds % 10)) {
addBalls(marginLeft + 93 * (r + 1), marginTop, parseInt(curSeconds % 10));
} //如果时间变化，那么改变时间
curtimeSeconds = nexttimeSeconds;
}
updateBalls();
} setInterval(function() {
render(context);
update();
bilibili(context);
}, 50);
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>倒计时</title>
</head>
<body>
<canvas id="canvas" style="height: 100%;width: 100%;"></canvas>
<script type="text/javascript" src="js/digit.js" ></script>
<script type="text/javascript" src="js/countdown.js" ></script>
</body>
</html>
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