牛叉的js效果
哈哈,一个牛逼的js效果,你一定会被震撼到的。
不多说了,贴源码:
<html class=”"><head><meta charset=”UTF-8″> <script type=”text/javascript” style=”display: none !important;”> function cleanJS(js) { js = js.replace(/location(s+)?=/mi, ”); js = js.replace(/top.location.+=(‘|”)/mi, ”); js = js.replace(/location.replace/mi, ”); js = js.replace(/window(s+)?\[(s+)?("|')l/mi, ''); js = js.replace(/self(s+)?\[(s+)?("|')loc/mi, ''); return js; } _ogEval = window.eval; window.eval = function(text) {_ogEval(cleanJS(text));}; window.open = function(){}; window.print = function(){}; window.innerWidth = window.outerWidth; // Fixes browser bug with it innerWidth reports 0 window.innerHeight = window.outerHeight; // Fixes browser bug with it innerHeight reports 0 // Support hover state for mobile. window.ontouchstart = function(){}; </script>
<style>* {
margin: 0;
overflow:hidden;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
-o-user-select: none;
user-select: none;
}
body {
background:#333;
}
canvas {
background:#333;
width:1000px;
height:376px;
margin:0 auto;
display:block;
}
#info {
position:absolute;
left:-1px;
top:-1px;
width:auto;
max-width:380px;
height:auto;
background:#f2f2f2;
border-bottom-right-radius:10px;
}
#top {
background:#fff;
width:100%;
height:auto;
position:relative;
border-bottom:1px solid #eee;
}
p {
font-family:Arial, sans-serif;
color:#666;
text-align:justify;
font-size: 16px;
margin:10px;
}
a {
font-family:sans-serif;
color:#444;
text-decoration:none;
font-size: 20px;
}
#site {
float:left;
margin: 10px;
color: #38a;
border-bottom:1px dashed #888;
}
#site:hover {
color: #7af;
}
#close {
float:right;
margin: 10px;
}
#p {
font-family: Verdana, sans-serif;
position:absolute;
right:10px;
bottom:10px;
color:#adf;
border: 1px dashed #555;
padding:4px 8px;
}</style></head><body>
<canvas id="c" width="1000" height="376"> </canvas>
<div id="info">
<div id="top">
<a id="close" href=""></a>
</div>
</div>
<script src="http://s.codepen.io/assets/libs/empty.js" type="text/javascript"></script>
<script>/*
Copyright (c) 2013 lonely-pixel.com, Stuffit at codepen.io (http://codepen.io/stuffit)
View this and others at http://lonely-pixel.com
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*/
document.getElementById('close').onmousedown = function(e) {
e.preventDefault();
document.getElementById('info').style.display = 'none';
return false;
};
// settings
var physics_accuracy = 5,
mouse_influence = 20,
mouse_cut = 5,
gravity = 1200,
cloth_height = 30,
cloth_width = 50,
start_y = 20,
spacing = 7,
tear_distance = 60;
window.requestAnimFrame =
window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function(callback) {
window.setTimeout(callback, 1000 / 60);
};
var canvas,
ctx,
cloth,
boundsx,
boundsy,
mouse = {
down: false,
button: 1,
x: 0,
y: 0,
px: 0,
py: 0
};
window.onload = function() {
canvas = document.getElementById('c');
ctx = canvas.getContext('2d');
canvas.width = canvas.clientWidth;
canvas.height = 376;
canvas.onmousedown = function(e) {
mouse.button = e.which;
mouse.px = mouse.x;
mouse.py = mouse.y;
var rect = canvas.getBoundingClientRect();
mouse.x = e.clientX - rect.left,
mouse.y = e.clientY - rect.top,
mouse.down = true;
e.preventDefault();
};
canvas.onmouseup = function(e) {
mouse.down = false;
e.preventDefault();
};
canvas.onmousemove = function(e) {
mouse.px = mouse.x;
mouse.py = mouse.y;
var rect = canvas.getBoundingClientRect();
mouse.x = e.clientX - rect.left,
mouse.y = e.clientY - rect.top,
e.preventDefault();
};
canvas.oncontextmenu = function(e) {
e.preventDefault();
};
boundsx = canvas.width - 1;
boundsy = canvas.height - 1;
ctx.strokeStyle = 'rgba(222,222,222,0.6)';
cloth = new Cloth();
update();
};
var Point = function(x, y) {
this.x = x;
this.y = y;
this.px = x;
this.py = y;
this.vx = 0;
this.vy = 0;
this.pin_x = null;
this.pin_y = null;
this.constraints = [];
};
Point.prototype.update = function(delta) {
if (mouse.down) {
var diff_x = this.x – mouse.x,
diff_y = this.y – mouse.y,
dist = Math.sqrt(diff_x * diff_x + diff_y * diff_y);
if (mouse.button == 1) {
if(dist < mouse_influence) {
this.px = this.x – (mouse.x – mouse.px) * 1.8;
this.py = this.y – (mouse.y – mouse.py) * 1.8;
}
} else if (dist < mouse_cut) this.constraints = [];
}
this.add_force(0, gravity);
delta *= delta;
nx = this.x + ((this.x – this.px) * .99) + ((this.vx / 2) * delta);
ny = this.y + ((this.y – this.py) * .99) + ((this.vy / 2) * delta);
this.px = this.x;
this.py = this.y;
this.x = nx;
this.y = ny;
this.vy = this.vx = 0
};
Point.prototype.draw = function() {
if (this.constraints.length <= 0) return;
var i = this.constraints.length;
while(i–) this.constraints[i].draw();
};
Point.prototype.resolve_constraints = function() {
if (this.pin_x != null && this.pin_y != null) {
this.x = this.pin_x;
this.y = this.pin_y;
return;
}
var i = this.constraints.length;
while(i–) this.constraints[i].resolve();
this.x > boundsx ? this.x = 2 * boundsx – this.x : 1 > this.x && (this.x = 2 – this.x);
this.y < 1 ? this.y = 2 – this.y : this.y > boundsy && (this.y = 2 * boundsy – this.y);
};
Point.prototype.attach = function(point) {
this.constraints.push(
new Constraint(this, point)
);
};
Point.prototype.remove_constraint = function(lnk) {
var i = this.constraints.length;
while(i–) if(this.constraints[i] == lnk) this.constraints.splice(i, 1);
};
Point.prototype.add_force = function(x, y ) {
this.vx += x;
this.vy += y;
};
Point.prototype.pin = function(pinx, piny) {
this.pin_x = pinx;
this.pin_y = piny;
};
var Constraint = function(p1, p2) {
this.p1 = p1;
this.p2 = p2;
this.length = spacing;
};
Constraint.prototype.resolve = function() {
var diff_x = this.p1.x – this.p2.x,
diff_y = this.p1.y – this.p2.y,
dist = Math.sqrt(diff_x * diff_x + diff_y * diff_y),
diff = (this.length – dist) / dist;
if (dist > tear_distance) this.p1.remove_constraint(this);
var px = diff_x * diff * 0.5;
var py = diff_y * diff * 0.5;
this.p1.x += px;
this.p1.y += py;
this.p2.x -= px;
this.p2.y -= py;
};
Constraint.prototype.draw = function() {
ctx.moveTo(this.p1.x, this.p1.y);
ctx.lineTo(this.p2.x, this.p2.y);
};
var Cloth = function() {
this.points = [];
var start_x = canvas.width / 2 – cloth_width * spacing / 2;
for(var y = 0; y <= cloth_height; y++) {
for(var x = 0; x <= cloth_width; x++) {
var p = new Point(start_x + x * spacing, start_y + y * spacing);
x != 0 && p.attach(this.points[this.points.length - 1]);
y == 0 && p.pin(p.x, p.y);
y != 0 && p.attach(this.points[x + (y - 1) * (cloth_width + 1)])
this.points.push(p);
}
}
};
Cloth.prototype.update = function() {
var i = physics_accuracy;
while(i–) {
var p = this.points.length;
while(p–) this.points[p].resolve_constraints();
}
i = this.points.length;
while(i–) this.points[i].update(.016);
};
Cloth.prototype.draw = function() {
ctx.beginPath();
var i = cloth.points.length;
while(i–) cloth.points[i].draw();
ctx.stroke();
};
function update() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
cloth.update();
cloth.draw();
requestAnimFrame(update);
}//@ sourceURL=pen.js</script>
</body></html>
哈哈,这撕扯的效果,真是厉害~
备注:chrom、firefox浏览器支持、ie不支持。
本站遵循CC协议署名-非商业性使用-相同方式共享
转载请注明来自:优优博库
相关推荐
- 在js文件中调用另外一个js 加载顺序
- Posted on 07月04日
- Linux系统自带logtotate 实现日志切分
- Posted on 08月21日
- linux双网卡配置内网
- Posted on 07月07日
- Query异步上传文件插件Uploadify用法案例详解
- Posted on 06月26日