Top #circlechallenge dweets

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: #Opposites

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pavel

function u(t) {

for(c.width&=i=4992;i--;x.beginPath(x.stroke()))[a=C(i%64)*t,b=C(i>>6)*t].map(o=>x.arc(448,252,252,o,o)),x.globalAlpha=1/77**(1-C(a-b))**.5

Jun 26 2022 8:58 PM UTC

}// 139/140

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Ripple

u/BriSeven

#circleChallenge #circle
u/magna

Love it!
u/DaSpider

Dethroned from the h/circlechallenge/top by u/pavel

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DaSpider

remix of d/16705 by u/DaSpider

function u(t) {

t?s+=(u=S(9*t+4))*(u>-.9):s=9;if(s>250)return;x.ellipse((c.width=999)/2,260,s,s,0,1,9);x.stroke();x.fill();throw`\n`.repeat(S(9*t)*3+4)

Apr 22 2020 7:55 PM UTC

}// 135/140

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Inflating #circlechallenge

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KilledByAPixel

remix of d/18406 by u/KilledByAPixel

function u(t) {

for(c.width|=i=z=1001;i--;)
x.arc(z,540,500,q=S(i*Math.PI*99/1e3+t/z)*t+1.57,q)
x.fill()

Apr 22 2020 4:56 AM UTC

}// 88/140

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u/KilledByAPixel

#waitforit
u/ersagun

#circlechallenge
u/joeytwiddle

One of the best examples of this effect IMO #trippy
u/donbright

oh my gourd

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DaSpider

function u(t) {

eval(unescape(escape`𩡯𬠨𮠽𚁣𛡷𪑤𭁨𯀽𜀩𛰴𛁢👄𨑴𩐨𚐮𬱬𪑣𩐨𜐶𛀲𝀩𛡳𬁬𪑴𚀧𞠧𚐬𮀮𭁲𨑮𬱬𨑴𩐨𮠪𜠬𮠩𛁩🐶𜀻𪐭𛐻𮀮𬡯𭁡𭁥𚀭𛠱𜀵𚐬𮀮𩡩𫁬𤡥𨱴𚀰𛀭𘑨𚡺𚰳𝐬𜐫𚁨𯁼𪐥𝐽🐰𚐪𝐬𛐳𜀭𪀪𮠩𚐊𪀽𛠵𚠨𪐽👢𦰰𧐥𜐲𚠵𚐫𚁩🐽𨡛𜑝𚐫𚁩🐽𨡛𜡝𚐊`.replace(/u../g,'')))

Apr 21 2020 7:04 PM UTC

}// 136/140

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Analog #clock

u/Xen

nice!
u/DaSpider

#time #analogclock #analog #circlechallenge

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veubeke

function u(t) {

x.fillRect(960,540,C(t)*300,S(t)*300)

Apr 21 2020 4:40 AM UTC

}// 37/140

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How are you drawing circles?

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veubeke

function u(t) {

with(x){for(beginPath(i=2),font='8em"';i--;fillStyle='#fff')
arc(960,540,i*800+300,0,Math.PI*2,i)
fill()
fillText('🚗',960+S(t)*500,850-t*2)}

Apr 22 2020 12:11 PM UTC

}// 140/140

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Because I can. #circlechallenge

u/sigveseb

Haha nice :D
u/donbright

haha

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KilledByAPixel

function u(t) {

with(x)c.width|=0,
fill(arc(960,520+S(t)*49,300,0,7)),
beginPath(filter=`blur(${4-S(t)}em`),
fill(ellipse(960,900,290,60,0,0,7))

Apr 22 2020 4:34 AM UTC

}// 128/140

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⬤ #circlechallenge

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iznax

function u(t) {

for(i=400;i--;)with(c[i]=t?c[i]:{X:i/7,Y:i,h:5,y:7}){X+=h,Y+=y
M=X*X+Y*Y
D=M>16e4?(X*h+Y*y)*2/M:0
h-=X*D
y-=Y*D
x.fillRect(960+X,540+Y,9,9)}

Apr 22 2020 4:00 AM UTC

}// 140/140

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Do Light Rays Bouncing In A Circle Qualify? #circlechallenge

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magna

function u(t) {

R=540,Y=R-t*99
for(s=0,d=-1;s<=R*R-Y*Y;s+=d+=2);
X=d/2
x.fillRect(960-X,R+Y,X*2,1)

Nov 2 2021 10:36 PM UTC

}// 82/140

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#circlechallenge No trig, no direct square root: Just using the Pythagorean theorem + the fact that sums of odd numbers give perfect squares

u/Xen

very clever sir

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Xor

function u(t) {

x.fillRect(960,r=540,C(t)*r,S(t)*r)

Apr 29 2021 9:38 PM UTC

}// 35/140

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Drawing a circle in 33 bytes

u/KilledByAPixel

#circlechallenge
u/New_Core

👍 the real challenge would be to beat the size of normal way to do it ( <30 bytes, same size centerd).
u/Xor

What's the normal way?
u/New_Core

well, I was thinking of arc as normal way. x.fill(x.arc(960,540,540,1,7)) (using arc is not the challenge,)

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