Created
February 17, 2016 08:13
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document.addEventListener('touchmove', function (e) { | |
e.preventDefault() | |
}) | |
var c = document.getElementsByTagName('canvas')[0], | |
x = c.getContext('2d'), | |
pr = window.devicePixelRatio || 1, | |
w = window.innerWidth, | |
h = window.innerHeight, | |
f = 90, | |
q, | |
m = Math, | |
r = 0, | |
u = m.PI*2, | |
v = m.cos, | |
z = m.random | |
c.width = w*pr | |
c.height = h*pr | |
x.scale(pr, pr) | |
x.globalAlpha = 0.6 | |
function i(){ | |
x.clearRect(0,0,w,h) | |
q=[{x:0,y:h*.7+f},{x:0,y:h*.7-f}] | |
while(q[1].x<w+f) d(q[0], q[1]) | |
} | |
function d(i,j){ | |
x.beginPath() | |
x.moveTo(i.x, i.y) | |
x.lineTo(j.x, j.y) | |
var k = j.x + (z()*2-0.25)*f, | |
n = y(j.y) | |
x.lineTo(k, n) | |
x.closePath() | |
r-=u/-50 | |
x.fillStyle = '#'+(v(r)*127+128<<16 | v(r+u/3)*127+128<<8 | v(r+u/3*2)*127+128).toString(16) | |
x.fill() | |
q[0] = q[1] | |
q[1] = {x:k,y:n} | |
} | |
function y(p){ | |
var t = p + (z()*2-1.1)*f | |
return (t>h||t<0) ? y(p) : t | |
} | |
document.onclick = i | |
document.ontouchstart = i | |
i() |
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