canvas模拟eharts首页动画效果

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canvas模拟eharts首页动画效果属于前端实例代码,有关更多实例代码大家可以查看

分享一段代码实例,它利用canvas模拟实现了eharts首页动画效果。

代码实例如下:

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.pipipi.net/" />
<title>犀牛前端部落</title>
<style>
* {
margin: 0;
padding: 0;
}
html, body {
width: 100%;
height: 100%;
}
body {
background: -webkit-linear-gradient(#4f7e9a,#2a3d56);
}
#sin {
display: block;
}
.wrap {
width: 0;
height: 200px;
position: absolute;
bottom: 40px;
left: 0;
overflow: hidden;
animation: kk 2.4s linear forwards;
}
@keyframes kk {
0% {
width: 0;
height: 200px;
}
100% {
width: 100%;
height: 200px;
}
}
.shadow {
width: 50%;
position: absolute;
top: 380px;
left: -100%;
animation: img 1s cubic-bezier(0.665, -0.570, 0.420, 1.650) forwards 1s;
}
@keyframes img {
0% {
left: -100%;
transform: translateX(0);
}
100% {
left: 50%;
transform: translateX(-56%);
}
}
#word {
display: block;
position: absolute;
top: 100px;
left: 50%;
transform: translateX(-50%);
animation: hah 1s cubic-bezier(0.665, -0.570, 0.420, 1.650) forwards;
}
@keyframes hah {
0% {
transform: translateX(-50%) scale(.3);
}
100% {
transform: translateX(-50%) scale(1);
}
}
</style>
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
</head>
<body>
<canvas id="word" width="1000" height="200"></canvas>
<div class="wrap">
<canvas id="sin" height="200"></canvas>
</div>
<script>
var screenWidth = document.documentElement.clientWidth;
$("#sin").attr("width", screenWidth);
var line = document.getElementById("sin");
var myCanvas = line.getContext("2d");
myCanvas.lineWidth = 2;
myCanvas.strokeStyle = "#fff";
myCanvas.beginPath();
myCanvas.translate(20, 100);
myCanvas.moveTo(-100, 50);
for (var i = 0; i < 80; i += 0.1) {
var x = i * 80 - 40;
var y = Math.cos(i) * 50;
myCanvas.lineTo(x, y);
}
myCanvas.stroke();
myCanvas.closePath();
myCanvas.lineWidth = 1;
myCanvas.strokeStyle = "rgba(255,255,255,.8)";
myCanvas.beginPath();
myCanvas.translate(15, -30);
myCanvas.moveTo(-100, 40);
for (var i = -2; i < 80; i += 0.1) {
var x = i * 60 - 40;
var y = Math.cos(i) * 40;
myCanvas.lineTo(x, y);
}
myCanvas.stroke();
myCanvas.closePath();
myCanvas.strokeStyle = "rgba(255,255,255,.5)";
myCanvas.beginPath();
myCanvas.translate(5, -46);
myCanvas.moveTo(-90, 40);
for (var i = 0; i < 80; i += 0.1) {
var x = i * 46 - 90;
var y = Math.cos(i) * 16;
myCanvas.lineTo(x, y);
}
myCanvas.stroke();
myCanvas.closePath();
/*  eCharts  */
var line2 = document.getElementById("word");
var myCanvas2 = line2.getContext("2d");
var timer = null;
var angle = 0;
var flag = 0;
var $deg = 0;
draw(0);
timer = setInterval(function() {
flag++;
if (flag >= 120) {
angle--;
// console.log(angle);
if (angle <= -40) {
clearInterval(timer);
}
$deg = angle * Math.PI / 180;
draw($deg);
}
}, 20);
myCanvas2.save();
myCanvas2.font = "150px Arial";
myCanvas2.beginPath();
myCanvas2.translate(210, 120);
myCanvas2.strokeStyle = "white";
myCanvas2.fillStyle = "white";
myCanvas2.fillText("charts 3", 30, 30);
myCanvas2.stroke();
myCanvas2.fill();
myCanvas2.closePath();
myCanvas2.restore();
function draw(deg) {
myCanvas2.save();
myCanvas2.beginPath();
myCanvas2.translate(190, 150);
myCanvas2.clearRect(-80, -100, 132, 120);
myCanvas2.rotate(deg);
//myCanvas2.strokeStyle = "rgba(170,49,77,.95)";
myCanvas2.fillStyle = "rgba(170,49,77,.95)";
myCanvas2.font = "160px Arial";
myCanvas2.fillText("e", -30, 10);
//myCanvas2.stroke();
myCanvas2.fill();
myCanvas2.rotate(-deg);
myCanvas.closePath();
myCanvas2.restore();
}
</script>
</body>
</html>

canvas模拟eharts首页动画效果,这样的场景在实际项目中还是用的比较多的,关于canvas模拟eharts首页动画效果就介绍到这了。

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