Created
April 12, 2021 12:07
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="UTF-8"> | |
<meta name="viewport" content="width=device-width, user-scalable=no"> | |
<script type="application/clojurescript"> | |
(defn loop [frame-time] | |
(js/requestAnimationFrame loop) | |
(run! (fn [i] | |
(let [a (/ 193 (* 3 i))] | |
(ctx/fillStyle= (rgba 0, i, 0, 0.1)) | |
(ctx/fillRect (+ 960 (* 960 (sin (* a 2000)))) | |
(mod (* 1000 (+ (tan i) (* a (time)))) 2000) | |
(if (< (* 6 a) 12) (* a 99) 0) | |
(if (< (* 6 a) 12) (* a 99) 0)))) | |
(reverse (range 384)))) | |
(loop 0) | |
</script> | |
<style> | |
body {overflow: hidden;} | |
</style> | |
</head> | |
<body> | |
<canvas id="canvas" height="1080" width="1280"></canvas> | |
<script src="https://cdn.jsdelivr.net/npm/@borkdude/sci@0.1.0/sci.min.js" type="application/javascript"></script> | |
<script type="application/javascript"> | |
var canvas = document.getElementById("canvas"); | |
var ctx = canvas.getContext("2d"); | |
function resizeCanvas() { | |
canvas.width = window.innerWidth; | |
canvas.height = window.innerHeight; | |
} | |
//window.addEventListener('resize', resizeCanvas, false); | |
resizeCanvas(); | |
var ctxns = {}; | |
function setter(k) { | |
return v => ctx[k] = v; | |
} | |
for (k in ctx) { | |
if (typeof ctx[k] == "function") { | |
ctxns[k]=ctx[k].bind(ctx); | |
} else { | |
ctxns[k]=ctx[k]; | |
ctxns[""+k+"="]=setter(k); | |
} | |
} | |
function rgba(r,g,b,a) { | |
a = a === undefined ? 1 : a; | |
return "rgba("+(r|0)+","+(g|0)+","+(b|0)+","+a+")"; | |
} | |
document.querySelectorAll('script[type="application/clojurescript"]').forEach( | |
script => sci.evalString(script.innerHTML, {bindings: {canvas: canvas, ctx: ctx, rgba: rgba, sin: Math.sin, tan: Math.tan, time: ()=> (new Date()).getMilliseconds()}, | |
namespaces: {js: window, canvas: canvas, ctx: ctxns, math: Math}}) | |
); | |
</script> | |
</body> | |
</html> |
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