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function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

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BalintCsala

function u(t) {

c.width=500
for(x.scale(i=5,5);i--;k=S(t*5),x[H]("⚪",S(T=(i?k>0:k<0)?k:0)*20+23+i*42,C(T)*20+30))x[H="fillText"]("⚪",30+i*7,50)

Sep 7 2018 8:45 AM UTC

}// 127/140

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Newton's cadle

u/fujimotos

#physics

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donbright

function u(t) {

c.width=2e3
for(i=0;i<t*t;i++){Φ=Math.acos(1-2*i/t/t)
Θ=10.1664*i
x.fillRect(
500*(2+C(Θ)*S(Φ)*S(t)+C(Φ)*C(t)),
500*(1+S(Θ)*S(Φ)),9,9)}

Sep 7 2018 4:57 AM UTC

}// 135/140

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Evenly spaced points on a sphere, based on CR Drost's phyllotaxis sunflower cylyndrical equal area map in python: https://stackoverflow.com/questions/9600801/…

u/joeytwiddle

Useful! #sphere
u/Odog8

Love me a PHI sphere in the morning!

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f8f82804

remix of d/9667 by u/corruptio

function u(t) {

eval(unescape(escape`楦⡴┷㰮〱⥦潲⡡㵮敷⁁畤楯䍯湴數琬猽〬椽㈸㭦㴹㤯⸹㔪⨧㈲㈵㔹㤷㜵㐴㔷㤹㔲㈴㔷㜵㐹㤧嬭⵩ⴱ崬椻⥷楴栨湥眠佳捩汬慴潲乯摥⡡ⱻ晲敱略湣示晽⤩捯湮散琨愮摥獴楮慴楯温ⱳ瑡牴⡳⤬獴潰⡳⬽⡦⼴簰⤯昩`.replace(/u(..)/g,"$1%")))

Sep 6 2018 10:18 PM UTC

}// 140/140

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Tetris! #audio #music -- remixed to stop after one repeat if you scroll away

u/f8f82804

if(t%7<.01)for(a=new AudioContext,s=0,i=28;f=99/.95**'222559977544579952245775499'[--i-1],i;)with(new OscillatorNode(a,{frequency:f}))connect(a.destination),start(s),stop(s+=(f/4|0)/f)
u/f8f82804

#halting #no-clicking
u/384.cz

#tetris

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f8f82804

remix of d/9617 by u/cantelope

function u(t) {

c.width=480;x.translate(w=240,130);x.rotate(S(t));for(i=17;i--;x.lineTo(w*.7*S(p=1.57*i-t+(g=i/4|0)*11)/(Z=2+C(p)),w*(g%2-.5)/Z));x.stroke()

Sep 6 2018 9:32 PM UTC

}// 140/140

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compound 3D rotations #d3 #cube #perspective

u/donbright

awesome
u/cantelope

neat trick :)
u/f8f82804

#wireframe

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f8f82804

function u(t) {

if(t%1<.01)c.width=480,s=t%8<.01?'l9 0l7 -7l7 7':s+s.replace(/([-.\d]+) ([-.\d]+)/g,(m,a,b)=>a/2+' '+-b/2),x.stroke(new Path2D('M0 9'+s))

Sep 6 2018 5:49 PM UTC

}// 137/140

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proof-of-concept using #regex replacement rules to create self-similar #path2d

u/donbright

thats fascinating

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katkip

function u(t) {

x.translate(5*S(t/2),5*C(t));x.fillRect(340,480,50,50)

Sep 6 2018 2:28 PM UTC

}// 54/140

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x.translate instead of x.drawImage is better? O_O Dwitter Snippets Test 4

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katkip

remix of d/9683 by u/katkip

function u(t) {

x.fillStyle=`hsl(${t*99},99%,50%)`;for(i=0;i++<t;)β=t/frame-(t--+ t--+1)/2,x.fillRect(400+i*100+S(++β)*300-t*99,540+S(++β)*540,50,50)

Sep 6 2018 2:19 PM UTC

}// 133/140

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Perfect #default C-Orbits. They are never touching

u/donbright

fascinating.....

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katkip

function u(t) {

c.width^=0;for(i=0;i++<9;)β=t/frame-(t--+1)/2,x.fillRect(400+i*100+S(β)*300,400,50,200)

Sep 6 2018 2:12 PM UTC

}// 87/140

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Newton #default ! It is applied a gravity law :) Dwitter snippets test 3

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katkip

function u(t) {

for(i=0;i++<75;)for(j=0;j++<41;)x.fillStyle=`hsl(${9e3/i*9e3/j+t*90},99%,50%)`,x.fillRect(i*25,j*25,25,25)

Sep 6 2018 1:44 PM UTC

}// 106/140

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Dwitter snippets test 2

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katkip

function u(t) {

for(i=0;i++<4e3;)x.fillStyle=`hsl(${t*99*i},99%,50%)`,x.fillRect(0,0,2e3/i*5,2e3/i*5);

Sep 6 2018 1:16 PM UTC

}// 86/140

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Pixel fix + testing dwitter snippets