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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="robots" content="noindex">
<title>io-fx03</title>
<meta name="author" content="iowen.cn">
<script src="../js/jquery.min.js"></script>
<style>
html, body { background: #1B1D1F; margin: 0; padding:0;}
canvas { width: 100%; height: 100%; position: absolute; }
</style>
</head>
<body>
<canvas width="1920" height="1040"></canvas>
<script>
$(function(){
var canvas = document.querySelector('canvas'),
ctx = canvas.getContext('2d')
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
ctx.lineWidth = .3;
ctx.strokeStyle = (new Color(150)).style;
var mousePosition = {
x: 30 * canvas.width / 100,
y: 30 * canvas.height / 100
};
var dots = {
nb: 150,
distance: 50,
d_radius: 100,
array: []
};
function colorValue(min) {
return Math.floor(Math.random() * 255 + min);
}
function createColorStyle(r,g,b) {
return 'rgba(' + r + ',' + g + ',' + b + ', 0.8)';
}
function mixComponents(comp1, weight1, comp2, weight2) {
return (comp1 * weight1 + comp2 * weight2) / (weight1 + weight2);
}
function averageColorStyles(dot1, dot2) {
var color1 = dot1.color,
color2 = dot2.color;
var r = mixComponents(color1.r, dot1.radius, color2.r, dot2.radius),
g = mixComponents(color1.g, dot1.radius, color2.g, dot2.radius),
b = mixComponents(color1.b, dot1.radius, color2.b, dot2.radius);
return createColorStyle(Math.floor(r), Math.floor(g), Math.floor(b));
}
function Color(min) {
min = min || 0;
this.r = colorValue(min);
this.g = colorValue(min);
this.b = colorValue(min);
this.style = createColorStyle(this.r, this.g, this.b);
}
function Dot(){
this.x = Math.random() * canvas.width;
this.y = Math.random() * canvas.height;
this.vx = -.5 + Math.random();
this.vy = -.5 + Math.random();
this.radius = Math.random() * 2;
this.color = new Color();
//console.log(this);
}
Dot.prototype = {
draw: function(){
ctx.beginPath();
ctx.fillStyle = this.color.style;
ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2, false);
ctx.fill();
}
};
function createDots(){
for(i = 0; i < dots.nb; i++){
dots.array.push(new Dot());
}
}
function moveDots() {
for(i = 0; i < dots.nb; i++){
var dot = dots.array[i];
if(dot.y < 0 || dot.y > canvas.height){
dot.vx = dot.vx;
dot.vy = - dot.vy;
}
else if(dot.x < 0 || dot.x > canvas.width){
dot.vx = - dot.vx;
dot.vy = dot.vy;
}
dot.x += dot.vx;
dot.y += dot.vy;
}
}
function connectDots() {
for(i = 0; i < dots.nb; i++){
for(j = 0; j < dots.nb; j++){
i_dot = dots.array[i];
j_dot = dots.array[j];
if((i_dot.x - j_dot.x) < dots.distance && (i_dot.y - j_dot.y) < dots.distance && (i_dot.x - j_dot.x) > - dots.distance && (i_dot.y - j_dot.y) > - dots.distance){
if((i_dot.x - mousePosition.x) < dots.d_radius && (i_dot.y - mousePosition.y) < dots.d_radius && (i_dot.x - mousePosition.x) > - dots.d_radius && (i_dot.y - mousePosition.y) > - dots.d_radius){
ctx.beginPath();
ctx.strokeStyle = averageColorStyles(i_dot, j_dot);
ctx.moveTo(i_dot.x, i_dot.y);
ctx.lineTo(j_dot.x, j_dot.y);
ctx.stroke();
ctx.closePath();
}
}
}
}
}
function drawDots() {
for(i = 0; i < dots.nb; i++){
var dot = dots.array[i];
dot.draw();
}
}
function animateDots() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
moveDots();
connectDots();
drawDots();
requestAnimationFrame(animateDots);
}
$('canvas').on('mousemove', function(e){
mousePosition.x = e.pageX;
mousePosition.y = e.pageY;
});
$('canvas').on('mouseleave', function(e){
mousePosition.x = canvas.width / 2;
mousePosition.y = canvas.height / 2;
});
createDots();
requestAnimationFrame(animateDots);
});
</script>
</body>
</html>