js实现canvas电流闪电放电动画效果代码
代码语言:html
所属分类:动画
代码描述:js实现canvas电流闪电放电动画效果代码,可调节闪电角度、速度、颜色、厚度及模糊度。
下面为部分代码预览,完整代码请点击下载或在bfwstudio webide中打开
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<style>
body {
font-family: sans-serif;
padding: 0;
margin: 0;
background-color: #222;
overflow: hidden;
-webkit-user-select: none;
-moz-user-select: none;
-o-user-select: none;
-ms-user-select: none;
user-select: none;
}
canvas {
position: absolute;
top: 0;
left: 0;
}
</style>
</head>
<body>
<canvas id='c'></canvas>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/simplex-noise.min.js"></script>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/dat.gui-min.js"></script>
<script>
/**
* requestAnimationFrame
*/
window.requestAnimationFrame = function () {
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function (callback) {
window.setTimeout(callback, 1000 / 60);
};
}();
/**
* Vector
*/
function Vector(x, y) {
this.x = x || 0;
this.y = y || 0;
}
Vector.add = function (a, b) {
return new Vector(a.x + b.x, a.y + b.y);
};
Vector.sub = function (a, b) {
return new Vector(a.x - b.x, a.y - b.y);
};
Vector.prototype = {
set: function (x, y) {
if (typeof x === 'object') {
y = x.y;
x = x.x;
}
this.x = x || 0;
this.y = y || 0;
return this;
},
add: function (v) {
this.x += v.x;
this.y += v.y;
return this;
},
sub: function (v) {
this.x -= v.x;
this.y -= v.y;
return this;
},
scale: function (s) {
this.x *= s;
this.y *= s;
return this;
},
length: function () {
return Math.sqrt(this.x * this.x + this.y * this.y);
},
normalize: function () {
var len = Math.sqrt(this.x * this.x + this.y * this.y);
if (len) {
this.x /= len;
this.y /= len;
}
return this;
},
angle: function () {
return Math.atan2(this.y, this.x);
},
distanceTo: function (v) {
var dx = v.x - this.x,
dy = v.y - this.y;
return Math.sqrt(dx * dx + dy * dy);
},
distanceToSq: function (v) {
var dx = v.x - this.x,
dy = v.y - th.........完整代码请登录后点击上方下载按钮下载查看
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