donut/index.html at master · SimoneDevkt/donut · GitHub

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<!DOCTYPE html>
<html>
<body>
    <textarea id="log" rows="23" cols="75"></textarea>
    <script>
        /*JS port of https://www.youtube.com/watch?v=rj7DOPPTkQA c: https://www.dropbox.com/s/79ga2m7p2bnj1ga/donut_deobfuscated.c?dl=0*/
        function loop(deltaTimeInMillisecond) {
            donut()
            window.requestAnimationFrame(loop)
        }
        let logger = document.getElementById('log')
        let A = 0
        let B = 0
        function donut(){
            let b = Array(1760).fill(32)
            let z = Array(7040).fill(0)
            for(let j=0; j < 6.28; j += 0.07) {
                for(let i=0; i < 6.28; i += 0.02) {
                    let c = Math.sin(i)
                    let d = Math.cos(j)
                    let e = Math.sin(A)
                    let f = Math.sin(j)
                    let g = Math.cos(A)
                    let h = d + 2
                    let D = 1 / (c * h * e + f * g + 5)
                    let l = Math.cos(i)
                    let m = Math.cos(B)
                    let n = Math.sin(B)
                    let t = c * h * g - f * e
                    let x = Math.floor(40 + 30 * D * (l * h * m - t * n))
                    let y = Math.floor(12 + 15 * D * (l * h * n + t * m))
                    let o = Math.floor(x + 80 * y)
                    let N = Math.floor(8 * ((f * e - c * d * g) * m - c * d * e - f * g - l * d * n))
                    if(22 > y && y > 0 && x > 0 && 80 > x && D > z[o]) {
                        z[o] = D
                        b[o] = ".,-~:;=!*#$@"[N > 0 ? N : 0]
                    }
                }
            }
            let ris = ''
            for(let k = 0; k < 1761; k++) {
                let num = k % 80 ? b[k] : 10
                ris += num === 10 ? '\n' : num === 32 ? ' ' : num
                A += 0.00004
                B += 0.00002
            }
            logger.innerHTML = ris
        }
        loop()
    </script>
</body>
</html>