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102 lines
3.1 KiB
102 lines
3.1 KiB
8 years ago
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$(function(){
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var header = $('.bgdl'),
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canvas = $('<canvas></canvas>').appendTo(header)[0],
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ctx = canvas.getContext('2d'),
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color = 'black',
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idle = null, mousePosition;
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canvas.width = window.innerWidth;
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canvas.height = window.innerHeight;
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canvas.style.display = 'block';
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ctx.fillStyle = color;
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ctx.lineWidth = .1;
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ctx.strokeStyle = color;
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var mousePosition = { x: 30 * canvas.width / 100, y: 30 * canvas.height / 100 },
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dots = { nb: (canvas.width < 640 ? 35 : 150), distance: 80, d_radius: 150, array: [] };
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function Dot(){
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this.x = Math.random() * canvas.width;
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this.y = Math.random() * canvas.height;
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this.vx = -.5 + Math.random();
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this.vy = -.5 + Math.random();
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this.radius = Math.random();
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}
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Dot.prototype = {
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create: function(){
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ctx.beginPath();
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ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2, false);
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ctx.fill();
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},
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animate: function(){
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for(var i = 0, dot=false; i < dots.nb; i++){
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dot = dots.array[i];
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if(dot.y < 0 || dot.y > canvas.height){
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dot.vx = dot.vx;
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dot.vy = - dot.vy;
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}else if(dot.x < 0 || dot.x > canvas.width){
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dot.vx = - dot.vx;
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dot.vy = dot.vy;
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}
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dot.x += dot.vx;
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dot.y += dot.vy;
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}
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},
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line: function(){
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for(var i = 0; i < dots.nb; i++){
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for(var j = 0; j < dots.nb; j++){
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i_dot = dots.array[i];
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j_dot = dots.array[j];
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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){
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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){
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ctx.beginPath();
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ctx.moveTo(i_dot.x, i_dot.y);
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ctx.lineTo(j_dot.x, j_dot.y);
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ctx.stroke();
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ctx.closePath();
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}
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}
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}
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}
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}
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};
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function createDots(){
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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for(var i = 0; i < dots.nb; i++){
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dots.array.push(new Dot());
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dot = dots.array[i];
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dot.create();
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}
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dot.line();
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dot.animate();
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}
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idle = setInterval(createDots, 1000/30);
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$(canvas).on('mousemove mouseleave', function(e){
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if(e.type == 'mousemove'){
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mousePosition.x = e.pageX;
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mousePosition.y = e.pageY;
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}
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if(e.type == 'mouseleave'){
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mousePosition.x = canvas.width / 2;
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mousePosition.y = canvas.height / 2;
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}
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});
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});
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