New #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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rep_movsd

function u(t) {

t||(M=O=.018,N=P=.9998,r=540)
if(t&&t<3.1)with(x){for(i=200,K=t*r,beginPath();--i;lineTo(K*B+r,K*A+r))A=O*N+P*M,B=P*N-O*M,O=A,P=B;stroke()}

May 15 2021 10:22 AM UTC

}// 139/140

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Look Ma - no trig!

u/rep_movsd

#Circlechallenge

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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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erin

function u(t) {

x.fillRect(960+S(t)*99,540+S(t+1.57)*99,9,9)

Apr 12 2021 3:30 PM UTC

}// 44/140

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who needed cosine anyway

u/erin

#circlechallenge
u/KilledByAPixel

you can also do +11
u/pavel

Who needs cosine OR sine? [X,Y]=t?[.995*X+Y/10,.995*Y-X/10]:[0,99];x.fillRect(960+X,540+Y,9,9)

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Whimpers

function u(t) {

x.fillRect(960+C(t)*(h=300-(t>6.28&&t*11)),540+S(t)*(h),C(t)*300,S(t)*300)

Apr 28 2020 11:19 PM UTC

}// 74/140

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#circlechallenge

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joeytwiddle

remix of d/18457 by u/ersagun

function u(t) {

Y=t*60,W=(25e4-(Y-540)**2)**.5
x.fillRect(960-W,Y,2*W,1)

Apr 28 2020 8:18 AM UTC

}// 56/140

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#circlechallenge using Pythagorus theorem

u/joeytwiddle

"Trigonometry isn't about triangles, it's about circles" — 3B1B
u/joeytwiddle

Smarter version, does the multiplication later: d/18385
u/DaSpider

Also d/18398
u/magna

WHOA

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BriSeven

remix of d/18368 by u/veubeke

function u(t) {

π=3.14
T=(x)=>π-(.5*x/π%1)*π*2
c=(x)=>(y=(x*x)**.5,16*x*(π-y)/(5*π*π-4*y*(π-y)))
x.fillRect(950,540,c(T(t+π/2))*300,c(T(t))*300)

Apr 24 2020 2:46 PM UTC

}// 128/140

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Bhaskara's Sine Approximation Formula #circlechallenge

u/BriSeven

what's kinda weird is the value of pi doesn't seem to matter much, it still makes a great looking circle.

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iverjo

remix of d/397 by u/iverjo

function u(t) {

for(i=960;i--;)x.fillRect(960+530*S(d=i/42)*S(b=63*i+t),(540+530*C(d)),s=5/(S(d)*C(b)+1.2),s)

Apr 24 2020 12:12 PM UTC

}// 93/140

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#circlechallenge

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iverjo

remix of d/1281 by u/iverjo

function u(t) {

for(i=24;i--;)x.fillRect(960+22*i*C(a=t*i/8),520+22*i*S(a),b=20+i,b)

Apr 24 2020 11:51 AM UTC

}// 68/140

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#circlechallenge

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katkip

function u(t) {

x.font=`420cm"`+x.fillText(`.`,-264,944)

Apr 24 2020 10:23 AM UTC

}// 40/140

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#circlechallenge

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katkip

function u(t) {

t?0:c.outerHTML=`<svg height="300" width="300"><circle cx="150" cy="150" r="150" fill="#f00"/></svg>`;

Apr 24 2020 10:20 AM UTC

}// 102/140

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working #svg #circlechallenge visible on HC theme

u/donbright

clever

dwitter.net | #circleChallenge