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snowflakes
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<!doctype html> | |
<body bgcolor="#808080"> | |
<script src="snow.js"></script> | |
</body> |
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/* Based on https://c.eev.ee/PARTYMODE/ */ | |
/* Snowflake images from https://www.misha.studio/snowflaker/ */ | |
.snow--container { | |
position: fixed; | |
z-index: 10000; | |
left: 0; | |
top: 0; | |
right: 0; | |
bottom: 0; | |
overflow: hidden; | |
pointer-events: none; | |
transform: translateZ(0); | |
-webkit-transform: translateZ(0); | |
} | |
.snow--flake { | |
position: absolute; | |
top: 0; | |
left: 0; | |
animation-name: snow--flake1; | |
animation-duration: 5s; | |
animation-iteration-count: infinite; | |
animation-timing-function: ease-in; | |
background-image: url(flakes.png); | |
width: 54px; | |
height: 54px; | |
background-size: 425px auto; | |
background-position: -26.5625px -26.5625px; | |
background-repeat: no-repeat; | |
} | |
@keyframes snow--flake1 { | |
from { | |
transform: translate(-10vw, -20vh) rotate(0deg); | |
} | |
to { | |
transform: translate(10vw, 120vh) rotate(180deg); | |
} | |
} | |
/* ~ugh~ */ | |
.snow--flake { | |
-webkit-animation-name: snow--flake1; | |
-webkit-animation-duration: 5s; | |
-webkit-animation-iteration-count: infinite; | |
-webkit-animation-timing-function: ease-in; | |
} | |
@-webkit-keyframes snow--flake1 { | |
from { | |
-webkit-transform: translate(-10vw, -20vh) rotate(0deg); | |
} | |
to { | |
-webkit-transform: translate(10vw, 120vh) rotate(180deg); | |
} | |
} |
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/* Based on https://c.eev.ee/PARTYMODE/ */ | |
/* Snowflake images from https://www.misha.studio/snowflaker/ */ | |
(function() { | |
// Number of kilopixels dedicated to each snowflake | |
var FLAKE_SPARSITY = 15; | |
var FLAKE_POP = 35; | |
// Get the path to ourselves | |
var cur = document.currentScript; | |
var path; | |
if (cur) { | |
path = cur.src; | |
} | |
else { | |
var scripts = document.getElementsByTagName('script'); | |
path = scripts[scripts.length - 1].src; | |
} | |
var lastslash = path.lastIndexOf('/'); | |
if (lastslash >= 0) | |
path = path.substring(0, lastslash + 1); | |
// Inject CSS we need | |
var css = document.createElement('link'); | |
css.type = 'text/css'; | |
css.rel = 'stylesheet'; | |
css.href = path + 'snow.css'; | |
document.head.appendChild(css); | |
// Create the container and fill it with some elements | |
var container = document.createElement('div'); | |
container.className = 'snow--container'; | |
var num_flakes = ( | |
document.documentElement.clientWidth | |
* document.documentElement.clientHeight | |
/ FLAKE_SPARSITY | |
/ 1000 | |
); | |
for (var i = 0; i < num_flakes; i++) { | |
var flake = document.createElement('div'); | |
flake.className = 'snow--flake'; | |
//flake.className += ' snow--flake' + Math.floor(Math.random() * FLAKE_POP); | |
// Randomize a bit | |
flake.style.animationDelay = "-" + String(Math.random() * 4) + "s"; | |
flake.style.animationDuration = String(Math.random() * 3 + 4) + "s"; | |
flake.style.left = String(Math.random() * 120 - 10) + "%"; | |
// Set flake position | |
var flakeno = Math.floor(Math.random() * FLAKE_POP); | |
flake.style.backgroundPositionX = -(26.5625 + 53.125*(flakeno%7)) + 'px'; | |
flake.style.backgroundPositionY = -(26.5625 + 53.125*Math.floor(flakeno/7)) + 'px'; | |
container.appendChild(flake); | |
} | |
// And done! No actual iavascript required to keep it running. | |
document.documentElement.appendChild(container); | |
})(); |
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