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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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Current theme challenge: #Food

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vgel

remix of d/27292 by u/vgel

function u(t) {

for(w=p=c.width|=H=Math.hypot;p<2e6;x.fillRect(p%w,p/w,Z*9,9))for(Z=i=9;i--;p+=19)Z-=H(H(C(t)*(X=p/w%1-.5)-S(t)*Z,p/1e6-1)-.4,C(t)*Z+S(t)*X)

Mar 31 2023 6:14 AM UTC

}// 140/140

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spinning torus #uncompressed #SDF

u/vgel

finally got it!!! this was really tough. thanks to u/Xen on d/27292 for pointing out an unneeded variable which sent me down this rabbit hole :-)

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rodrigo.siqueira

remix of d/20162 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,w=2e3,w)
for(i=900;i--;x.strokeRect(0,540+S(i/400+t*5)*360,w,w))x.setLineDash([i]),x.lineDashOffset=-990%i,x.strokeStyle=R(i)

Oct 4 2020 2:58 PM UTC

}// 140/140

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Waving chessboard #chess

u/Leodude123

#awsome!!!!!!

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metamero

function u(t) {

for(i=999;--i;i&1&&x.fillRect(z*(i%23),z*(i/23|0),z,z))z=90

Oct 29 2019 3:37 PM UTC

}// 59/140

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59B checkered pattern ! new ultra-golf challenge ! rules proposed on discord

u/New_Core

I didnt read the rules but here is a 48B for(i=166;i--;)x.fillRect(i%24*90,i%14*90,90,90)
u/pavel

Would be good to put the rules here... Can the scale be not 90? Seems like a bad number. 120 fits nicely horizontally and vertically, I'd choose that. Or a power of two for possible bit twiddling.
u/metamero

rules of this one: - full render on first/each frame - full resolution - exact 12 squares on vertical

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384.cz

function u(t) {

for(c.width=j=i=2e3;i--;)x.fillRect(i,j=(j^i)%(999-t*9),1,2e3)

Sep 10 2024 3:09 PM UTC

}// 62/140

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u/magna

This is the most esoteric sorting algorithm in computer science
u/SkibidiHawk

#sigmaboy

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DazeWare

remix of d/26226 by u/DazeWare

function u(t) {

c.style.filter="blur(4vh)contrast(9)"
for(i=0;i<99;i++){
x.fillStyle=R(i)
x.fillRect(960+i/8*t*S(t),540+i/8*t*C(t),i,i)}

Oct 1 2022 1:10 AM UTC

}// 120/140

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rodrigo.siqueira

remix of d/15690 by u/pavel

function u(t) {

with(x)for(j=4;j--;fill())for(beginPath(i=8);i-=2;fillStyle=j%2?'#124':'#fff')arc(960,540,2**([1.4,t%=6,2,5][j]*t/2+7),a=(i+t+(j<2))/.955,a)

Sep 15 2019 2:13 PM UTC

}// 140/140

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Star of Pavel

u/katkip

Awesome

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Xen

remix of d/15931 by u/trupples

function u(t) {

x.font="25em'"
x.fillText("Dwitter",a=99,a*3)
x.fillStyle=`hsl(${Z=t*a},100%,40%)`
x.drawImage(c,Z,Z)

Oct 5 2019 3:18 AM UTC

}// 101/140

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taupelink

function u(t) {

for(i=d=e=1e3;i--;x.fillRect(d*z,e*z,e%3/2,d%3/2))[d,e]=[(r=Math.random(z=99)*z|0)/5+(p=1+d/30+e/40)*(2+r%2)/(1+r%3)*C(d/4),r%11-S(d/4)/p]

Sep 8 2019 9:35 PM UTC

}// 138/140

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d/15657

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initramfs

remix of d/22971 by u/davidsover

function u(t) {

for(c.width|=0,x.font="100px A",i=99;i--;)for(j=9;j--;)x.fillText(String.fromCharCode(1+i),100*(i-j*19-t*2),163*j+1)

Jun 2 2021 10:09 PM UTC

}// 116/140

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Xen

remix of d/3094 by u/Xen

function u(t) {

for(c.width|=a=139;--a;)x.arc(900+a*C(t*t/a),500+a*S(t*a/9),a*6,-t%4,t%3);
x.fill('evenodd')

Aug 23 2017 1:28 PM UTC

}// 92/140

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u/cantelope

*.*
u/magna

WAT
u/donbright

!!!
u/Xen

you are feeling sleepy....good now send xen a beer :D