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zodiac (complete rewrite) #15

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97b3d72
Create zodiac.js
indus Apr 2, 2015
c9868a7
Create zodiac.min.js
indus Apr 2, 2015
37318a9
Create zodiac.ts
indus Apr 2, 2015
ba48b2c
Create index.html
indus Apr 2, 2015
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48 changes: 48 additions & 0 deletions zodiac/index.html
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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Zodiac</title>
<style>
html,
body {
width: 100%;
height: 100%;
padding: 0;
margin: 0;
background-color: #111;
overflow: hidden;
}

#zodiac {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<canvas id="zodiac"></canvas>
<script src="script/zodiac.min.js"></script>
<script>

document.addEventListener('DOMContentLoaded', function () {

new Zodiac('zodiac', { // HTMLCanvasElement or id
direction: [0, -1], // [dirX (-1:left,0:random,1:right),dirX (-1:up,0:random,1:down)]
velocity: [[.1, .2], [.5, 1]], // [[velXmin,velXmax],[velYmin,velYmax]]
bounce: [false, true], //[bounceTopBottom,bounceLeftRight]
parallax: .2, // float [0-1...]; 0 no paralax; 1 move one vw
density: 6000, // px^2
proximity: 50, // px
dotRadius: [1, 5], // float or [float(min),float(max)]
//dotColor: '#aaa',
lineColor: '#666',
lineWidth: 2,
//backgroundColor: 'rgba(20,20,20,.3)', // default transparent; use alpha value for motion blur and ghosting
});

}, false);

</script>
</body>
</html>
112 changes: 112 additions & 0 deletions zodiac/script/zodiac.js
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"use static";
var Zodiac = (function () {
function Zodiac(canvas, options) {
if (options === void 0) { options = {}; }
this.options = {
direction: [0, 0],
velocity: [[.1, 0.3], [.1, .3]],
bounce: [true, true],
parallax: .2,
density: 5000,
proximity: 50,
//dotColor: '#aaa',
dotRadius: [1, 5],
lineColor: '#aaa',
lineWidth: 1,
};
var canvas = (typeof canvas == 'string' || canvas instanceof String) ? document.getElementById(canvas) : canvas;
if (canvas.tagName != 'CANVAS')
throw "no canvas";
for (var key in options) {
this.options[key] = options[key];
}
options = this.options;
var ctx = canvas.getContext('2d', { alpha: !options.backgroundColor }), particles = [], tilt = [0, 0], radius = [].concat(options.dotRadius), parallax = options.parallax / 2 / (radius[1] ? (radius[1] - radius[0]) : radius[0]);
var update = function () {
var w = canvas.width, h = canvas.height;
if (options.backgroundColor) {
ctx.fillStyle = options.backgroundColor;
ctx.fillRect(0, 0, w, h);
ctx.fillStyle = options.dotColor;
}
else {
ctx.clearRect(0, 0, w, h);
}
ctx.beginPath();
for (var i = 0, p, x, y; i < particles.length; i++) {
p = particles[i];
/* MOVE */
p[1] += p[3];
p[2] += p[4];
/* POSITION */
if (options.parallax) {
var fac = p[0] * parallax;
p[5] += (tilt[0] * fac - p[5]) / 10;
p[6] += (tilt[1] * fac - p[6]) / 10;
}
x = p[1] + p[5];
y = p[2] + p[6];
if (x < 0 || x > w)
(options.direction[0]) ? (p[1] = ((x + w) % w) - p[5]) : (p[3] = -p[3]);
if (y < 0 || y > h)
(options.direction[1]) ? (p[2] = ((y + h) % h) - p[6]) : (p[4] = -p[4]);
var r = radius[1] ? p[0] : radius[0];
/* DRAW */
ctx.moveTo(x + r, y);
ctx.arc(x, y, r, 0, Math.PI * 2);
for (var j = i - 1; j >= 0; j--) {
var q = particles[j], dx = q[1] - p[1], dy = q[2] - p[2], dist = Math.sqrt((dx * dx) + (dy * dy));
if (dist < options.proximity) {
var x = p[1] + p[5], y = p[2] + p[6], x2 = q[1] + q[5], y2 = q[2] + q[6], a = Math.atan2(y2 - y, x2 - x), r2 = radius[1] ? q[0] : radius[0], cos = Math.cos(a), sin = Math.sin(a);
x += r * cos;
y += r * sin;
x2 -= r2 * cos;
y2 -= r2 * sin;
ctx.moveTo(x, y);
ctx.lineTo(x2, y2);
}
}
}
;
ctx.stroke();
options.dotColor && ctx.fill();
requestAnimationFrame(update);
};
var onMousemove = function (ev) {
tilt[0] = ev.pageX - window.innerWidth / 2;
tilt[1] = ev.pageY - window.innerHeight / 2;
};
var onOrientation = function (ev) {
tilt[0] = Math.min(Math.max(-ev.beta, -30), 30) * (window.innerWidth / 30);
tilt[1] = Math.min(Math.max(-ev.gamma, -30), 30) * (window.innerHeight / 30);
};
var onResize = function () {
var w = canvas.width = canvas.offsetWidth, h = canvas.height = canvas.offsetHeight, v = options.velocity, d = options.direction, random = Math.random;
var num = Math.ceil((w * h) / options.density);
for (var i = particles.length - 1; i >= 0; i--)
if (particles[i][1] > w || particles[i][2] > h)
particles.splice(i, 1);
if (num < particles.length)
particles.splice(num);
while (num > particles.length)
particles.push([
Math.ceil(radius[1] ? (random() * (radius[1] - radius[0]) + radius[0]) : random() * radius[0]),
Math.ceil(random() * w),
Math.ceil(random() * h),
(d[0] || ((random() > .5) ? 1 : -1)) * (random() * (v[0][1] - v[0][0]) + v[0][0]),
(d[1] || ((random() > .5) ? 1 : -1)) * (random() * (v[1][1] - v[1][0]) + v[1][0]),
0,
0
]);
ctx.strokeStyle = options.lineColor;
ctx.fillStyle = options.dotColor;
ctx.lineWidth = options.lineWidth;
};
window.addEventListener('resize', onResize, false);
document.addEventListener('mousemove', onMousemove, false);
window.addEventListener('deviceorientation', onOrientation, false);
onResize();
update();
}
return Zodiac;
})();
1 change: 1 addition & 0 deletions zodiac/script/zodiac.min.js
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161 changes: 161 additions & 0 deletions zodiac/script/zodiac.ts
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"use static"

class Zodiac {
options: any = {
direction: [0, 0],
velocity: [[.1, 0.3], [.1, .3]],
bounce: [true, true],
parallax: .2,
density: 5000,
proximity: 50,
//dotColor: '#aaa',
dotRadius: [1,5],
lineColor: '#aaa',
lineWidth: 1,
//backgroundColor: 'rgba(20,20,20,.2)',
};

constructor(canvas: any, options: any = {}) {

var canvas = (typeof canvas == 'string' || canvas instanceof String) ?
document.getElementById(canvas) : canvas;

if (canvas.tagName != 'CANVAS') throw "no canvas";

for (var key in options) { this.options[key] = options[key]; }
options = this.options;

var ctx = canvas.getContext('2d', { alpha: !options.backgroundColor }),
particles = [],
tilt = [0, 0],
radius = [].concat(options.dotRadius),
parallax = options.parallax/2 / (radius[1] ? (radius[1] - radius[0]) : radius[0]);

var update = function () {
var w = canvas.width,
h = canvas.height;

if (options.backgroundColor) {
ctx.fillStyle = options.backgroundColor;
ctx.fillRect(0, 0, w, h);
ctx.fillStyle = options.dotColor;
} else {
ctx.clearRect(0, 0, w, h);
}

ctx.beginPath();

for (var i = 0, p, x, y; i < particles.length; i++) {
p = particles[i];

/* MOVE */
p[1] += p[3];
p[2] += p[4];

/* POSITION */
if (options.parallax) {
var fac = p[0] * parallax;
p[5] += (tilt[0] * fac - p[5]) / 10;
p[6] += (tilt[1] * fac - p[6]) / 10;
}

x = p[1] + p[5];
y = p[2] + p[6];

if (x < 0 || x > w)
(options.direction[0]) ? (p[1] = ((x + w) % w) - p[5]) : (p[3] = -p[3]);

if (y < 0 || y > h)
(options.direction[1]) ? (p[2] = ((y + h) % h) - p[6]) : (p[4] = -p[4]);

var r = radius[1] ? p[0] : radius[0];
/* DRAW */
ctx.moveTo(x + r, y);
ctx.arc(x, y, r, 0, Math.PI * 2);

// loop back no double connections
for (var j = i - 1; j >= 0; j--) {
var q = particles[j],
dx = q[1] - p[1],
dy = q[2] - p[2],
dist = Math.sqrt((dx * dx) + (dy * dy));

if (dist < options.proximity) {
var x = p[1] + p[5],
y = p[2] + p[6],
x2 = q[1] + q[5],
y2 = q[2] + q[6],
a = Math.atan2(y2 - y, x2 - x),
r2 = radius[1] ? q[0] : radius[0],
cos = Math.cos(a),
sin = Math.sin(a);

x += r * cos;
y += r * sin;
x2 -= r2 * cos;
y2 -= r2 * sin;

ctx.moveTo(x, y);
ctx.lineTo(x2, y2);
}
}
};
ctx.stroke();
options.dotColor && ctx.fill();

requestAnimationFrame(update);
}


var onMousemove = function (ev?: MouseEvent) {
tilt[0] = ev.pageX - window.innerWidth / 2;
tilt[1] = ev.pageY - window.innerHeight / 2;
}

var onOrientation = function (ev?: any) {
tilt[0] = Math.min(Math.max(-ev.beta, -30), 30) * (window.innerWidth / 30);
tilt[1] = Math.min(Math.max(-ev.gamma, -30), 30) * (window.innerHeight / 30);

}

var onResize = function () {

var w = canvas.width = canvas.offsetWidth,
h = canvas.height = canvas.offsetHeight,
v = options.velocity,
d = options.direction,
random = Math.random;

var num = Math.ceil((w * h) / options.density);

for (var i = particles.length - 1; i >= 0; i--)
if (particles[i][1] > w || particles[i][2] > h)
particles.splice(i, 1);

if (num < particles.length)
particles.splice(num);

while (num > particles.length)
particles.push([
Math.ceil(radius[1] ? (random() * (radius[1] - radius[0]) + radius[0]) : random() * radius[0]), //z
Math.ceil(random() * w), //x
Math.ceil(random() * h), //y
// (random)direction * clamped random velocity
(d[0] || ((random() > .5) ? 1 : -1)) * (random() * (v[0][1] - v[0][0]) + v[0][0]), //vx
(d[1] || ((random() > .5) ? 1 : -1)) * (random() * (v[1][1] - v[1][0]) + v[1][0]), //vy
0, 0 // offset
]);


ctx.strokeStyle = options.lineColor;
ctx.fillStyle = options.dotColor;
ctx.lineWidth = options.lineWidth;
}

window.addEventListener('resize', onResize, false);
document.addEventListener('mousemove', onMousemove, false);
window.addEventListener('deviceorientation', onOrientation, false);
onResize();
update();
}
}