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line.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Cache-Control" content="no-cache">
<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0,user-scalable=no">
<meta name="full-screen" content="yes">
<title>irregular</title>
<style>
html, body {
margin: 0;
padding: 0;
background: #666;
}
#canvas {
margin-left: -100px;
margin-top: -160px;
}
</style>
</head>
<body>
<canvas id="canvas" >
your computer is not support canvas
</canvas>
</body>
<script>
var vendors = ['webkit', 'moz', 'ms', 'o'];
var lastTime = 0;
for (var i = 0; i < vendors.length && !window.requestAnimationFrame; i++) {
window.requestAnimationFrame = window[vendors[i]+'RequestAnimationFrame'];
window.cancleAnimationFrame = window[vendors[i]+'CancleAnimationFrame'] || window[vendors[i]+'CancleRequestAnimationFrame'];
};
if(!window.requestAnimationFrame){
window.requestAnimationFrame = function(cb){
var nowTime = new Date().getTime();
var timeTCall = Math.max(0, 16 - (nowTime - lastTime));
var id = setTimeout(function(){
cb(nowTime + timeTCall);
}, timeTCall);
lastTime = nowTime + timeTCall;
return id;
}
}
if(!window.cancleAnimationFrame){
window.cancleAnimationFrame = function(id){
clearTimeout(id);
}
}
// console.log(':::' + "#" + (Math.random() + "").slice(-3));
function irregular(){
this.points = [];
this.cSize = {
'width': window.innerWidth+200,
'height': 800
};
this.aSelP = [];
// ['#2D2C2C', '#343232', '#373737', '#3D3C3C']
this.init();
// console.log(( Math.asin(-0.5) + 2*Math.PI)/Math.PI *180);
}
irregular.prototype.init = function(){
this.getC();
this.getPos();
// this.drawPoint();
this.getClosest();
this.animate();
// var arr = [55, 2.1, 10, 6, 390, 9];
// arr.sort(this.sortNumber);
}
irregular.prototype.getC = function(){
this.c = document.getElementById('canvas');
this.ctx = this.c.getContext('2d');
this.c.width = this.cSize.width;
this.c.height = this.cSize.height;
}
irregular.prototype.getPos = function(){
this.nowCSize = {
'width': 0,
'height': 0
};
this.row = 0;
this.sideL = 150;
while(this.nowCSize.height < this.cSize.height){
// console.log(222);
this.nowCSize.width = (this.row%2 == 0) ? 0 : this.sideL/2;
this.row++;
while(this.nowCSize.width < this.cSize.width){
var pTmp = new point();
pTmp.init({
'x': this.nowCSize.width,
'y': this.nowCSize.height
})
// console.log(this.nowCSize.width);
this.points.push( pTmp );
this.nowCSize.width += this.sideL;
}
this.nowCSize.height += Math.sin(Math.PI/3) * this.sideL;
}
// console.log(this.points);
}
irregular.prototype.animate = function(){
var This = this;
requestAnimationFrame(run);
function run(){
This.updateLine();
requestAnimationFrame(run);
}
}
irregular.prototype.updateLine = function(){
this.ctx.clearRect(0,0,this.c.width, this.c.height);
for (var i = 0; i < this.points.length; i++) {
// var i =30;
this.points[i].transform();
var aClosest = this.points[i].closest;
for (var j = 0; j < aClosest.length; j++) {
if(j >= aClosest.length-1){
// console.log(j);
this.drawLine(this.points[i], this.points[aClosest[j].index], this.points[aClosest[0].index]);
}
else{
this.drawLine(this.points[i], this.points[aClosest[j].index], this.points[aClosest[j+1].index]);
}
};
}
}
irregular.prototype.drawLine = function(){
var arg0_x = arguments[0].x + arguments[0].ta_x,
arg0_y = arguments[0].y + arguments[0].ta_y,
arg1_x = arguments[1].x + arguments[1].ta_x,
arg1_y = arguments[1].y + arguments[1].ta_y,
arg2_x = arguments[2].x + arguments[2].ta_x,
arg2_y = arguments[2].y + arguments[2].ta_y;
this.ctx.strokeStyle = 'rgb(241, 245, 245)';
var grd = this.ctx.createLinearGradient(arg0_x, arg0_y, (arg1_x+arg2_x)/2, (arg1_y+arg2_y)/2);
grd.addColorStop(0, arguments[0].color[arguments[0].cIndex].c1);
grd.addColorStop(1, arguments[0].color[arguments[0].cIndex].c2);
this.ctx.fillStyle = grd;
this.ctx.beginPath();
this.ctx.moveTo(arg0_x, arg0_y);
this.ctx.lineTo(arg1_x, arg1_y);
this.ctx.lineTo(arg2_x, arg2_y);
this.ctx.closePath();
this.ctx.stroke();
this.ctx.fill();
}
irregular.prototype.Intersect = function(pA, pB, pC, pD){
var a1 = (pA.y - pB.y)/(pA.x - pB.x);
var a2 = (pC.y - pD.y)/(pC.x - pD.x);
var b1 = (pA.x*pB.y - pB.x*pA.y)/(pA.x - pB.x);
var b2 = (pC.x*pD.y - pD.x*pC.y)/(pC.x - pD.x);
var Apro = a2*pA.x + b2 - pA.y;
var Bpro = a2*pB.x + b2 - pB.y;
var Cpro = a1*pC.x + b1 - pC.y;
var Dpro = a1*pD.x + b1 - pD.y;
return (Apro*Bpro < 0 && Cpro*Dpro < 0) ? true : false;
}
irregular.prototype.getClosest = function(){
var This = this;
// console.log(this.points.length);
this.allLine = [];
for (var i = 0; i < this.points.length; i++) {
// var i = 30;
this.aSelP = [];
for (var j = 0 ; j < this.points.length ; j++) {
if(i !== j) {
var dis = this.getDis(this.points[i], this.points[j]);
if(dis <= 150){
this.aSelP.push({
'index': j,
'dis': dis
});
this.allLine.push([i,j])
}
}
};
this.aSelP.sort(function(a, b){
return a.dis - b.dis;
});
this.aSelP = this.aSelP.slice(0, 5);
this.points[i].closest = this.aSelP;
for (var j = 0; j < this.aSelP.length; j++) {
this.aSelP[j].ang = this.getAngle(this.points[i], this.points[ this.aSelP[j].index ]);
};
this.points[i].closest.sort(function(a, b){
return a.ang - b.ang;
});
};
}
irregular.prototype.getDis = function(p1, p2){
return Math.sqrt( Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2) ) ;
}
irregular.prototype.getAngle = function(p1, p2){
var dx = p1.x - p2.x,
dy = p1.y - p2.y,
r = this.getDis(p1, p2),
round = (dy < 0) ? Math.PI : 0,
symbolY = (dy >= 0) ? 0 : 1;
symbolX = (dx >= 0) ? 0 : 1;
symbol = (dx*dy >= 0) ? 0: 1;
if(symbol){
if(symbolY){
return ( Math.asin(dy/r) + Math.PI*2 )/Math.PI *180;
}
else{
return ( Math.asin(-dy/r) + Math.PI )/Math.PI *180;
}
}
else{
if(dy <= 0 && dx < 0){
return ( Math.asin(-dy/r) + Math.PI)/Math.PI *180;
}
else if(dy >= 0 && dx > 0) {
return ( Math.asin(dy/r))/Math.PI *180;
}
}
}
irregular.prototype.random = function(min, max){
return min + Math.random()*(max - min);
}
function point(){
this.x = 0;
this.y = 0;
this.closest = [];
this.color = [
{
'c1': '#33b1cc',
'c2': '#26d7ff'
},
{
'c1': '#56c4dd',
'c2': '#48d6f6'
},
{
'c1': '#14a0c0',
'c2': '#16b5d9'
}
]
this.cIndex = Math.floor( Math.random()*this.color.length );
this.ta_x = Math.random()*100 - 50;
this.ta_y = Math.random()*100 - 50;
// this.ta_x = 0;
// this.ta_y = 0;
this.moveTo();
}
point.prototype.init = function(json){
for(var attr in json){
this[attr] = json[attr];
}
}
point.prototype.moveTo = function(json){
this.life = 4000 + Math.random()*2000;
this.to_x = Math.random()*100 - 50;
this.to_y = Math.random()*100 - 50;
this.s_T = new Date().getTime();
this.f_x = this.ta_x;
this.f_y = this.ta_y;
}
point.prototype.transform = function(){
var now = new Date().getTime();
var progress = now - this.s_T;
if(progress < this.life){
this.ta_x = this.Tween['linear'](progress, this.f_x, this.to_x - this.f_x, this.life);
this.ta_y = this.Tween['linear'](progress, this.f_y, this.to_y - this.f_y, this.life);
}
else {
this.moveTo();
}
// console.log(this.ta_x);
}
point.prototype.Tween = {
linear: function (t, b, c, d){ //匀速
return c*t/d + b;
}
}
var irregular = new irregular();
</script>
</html>