Top dweets by u/pavel

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Opposites

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pavel

function u(t) {

for(i=c.width|=f=g=>(180+i%3*80+i/9)*g(a=(i/3&15)*.39-10)-42*S(i/450-i%3*2+2*t)*g(a-1.6);i--;)x.fillRect(960+f(C),540+f(S),s=4+5*S(i/611),s)

Jun 14 2020 7:01 PM UTC

}// 140/140

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Worm Sun #beesandbombs

u/Qwitter

"worms, my feet, as they touch the ground" - a W.Shatner vinyl album in a nearby Universe

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pavel

function u(t) {

for(i=c.width|=z=[];i--;z[i]=[2e3/(6+C(t)/d),S(t++)/d,R(255*d)])d=S(i%1.5708+.79);for([s,X,x.fillStyle]of z.sort())x.fillRect(960+s*X,s,9,s)

Jun 12 2020 2:29 AM UTC

}// 140/140

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Just a #box

u/KilledByAPixel

Whats in the box? 😅
u/tomxor

Nice, painters algorithm in a sort. Also haven't seen direct property assignment inside array destructuring before (x.fillStyle)
u/tomxor

u/killedbyapixel I had a peak: z[i]=[ 9e2/(3+C(t)/d),

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pavel

remix of d/18322 by u/pavel

function u(t) {

for(let i=1920,f=(x,y,n=256)=>x*y<n?f(x*x-y*y-.8,2*x*y+.156,n-1):1-n/256;i--;x.fillRect(i,t*180,1,3))x.globalAlpha=f(i/540-16/9,1-t/3)

Apr 18 2020 8:32 AM UTC

}// 134/140

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#julia set for c = −0.8 + 0.156i

Show more comments…
u/pavel

Using x*y<n instead of the normal n&&x*x+y*y<2 is much shorter and creates the black whisps that look pretty cool.
u/pavel

This version makes it easy to play with different values of c. You can find some in https://en.wikipedia.org/wiki/Julia_set#Quad…
u/pavel

https://en.wikipedia.org/wiki/Julia_set#Quad…
u/pavel

Is link pasting broken?
u/Xen

Sexy!
u/katkip

wow
u/katkip

https://en.wikipedia.org/wiki/Julia_set
u/rodrigo.siqueira

Awesome and fast. I am remixing it to add color schemes and colorization methods.
u/Qwitter

SO FAST!

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pavel

remix of d/17562 by u/KilledByAPixel

function u(t) {

c.style.filter="blur(1vh)sepia()invert(";for(c.width=198,k=777;j=--k>>5;x.arc(99,56,r*r,a=(j+k%32)%30*.21+S(r)/2,a))r=j+k%2+t%2-2;x.stroke()

Feb 12 2020 7:37 AM UTC

}// 140/140

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#uncompressed

u/KilledByAPixel

i knew you could do it 😉

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pavel

remix of d/13538 by u/vinca

function u(t) {

for(c.width=73,i=3e3;X=i--/41;x.fillRect(X,Y,1,2))h=Math.hypot,x.fillStyle=R(4e3/h(o=X-36,Y=i%41)+(b=2e3/h(o-25*S(5*t),20+9*T(4*t)-Y)),0,b)

May 1 2019 7:06 PM UTC

}// 139/140

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u/vinca

Amazing! 182->139bytes

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pavel

function u(t) {

eval(unescape(escape`景爨椽挮睩摴桼㵰㵃⡴⤻椭ⴻ砮晩汬剥捴⠹㘰⵳⼲⬨椥ㄲⴶ⤪㔴〯稬⡺⭡⩓⡴⤭截瀩⨵㐰⽺⵳⼲ⱳⱳ⤩愽椯ㄲ┱㈭㙼〬戽椯ㄴ㐭㙼〬稽ㄫ愪瀫截匨琩ⱺ⨽稾⸴ⱳ㴱㔰⽺⽺;`.replace(/u(..)/g,"$1%")))

Apr 17 2019 7:06 AM UTC

}// 123/140

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pavel

remix of d/10939 by u/veubeke

function u(t) {

for(c.width=2*(n=i=300);--i;x.fill(new Path2D('M0 2C8-5,8 8,0 0')))z=4/(2+C(A=t*i/n+i*i)),x.setTransform(C(A)*z,0,0,z,S(A)*99*z+n,i*i%n+9*z)

Nov 12 2018 1:04 AM UTC

}// 140/140

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u/iverjo

#fish

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pavel

remix of d/15161 by u/KilledByAPixel

function u(t) {

for(c.width|=j=9;j--;x.fill())for(x.beginPath(i=6);i--;x.arc(960+r*C(b=.785*(2*j-o)-t),540+r*S(b),120,a=i/.96-o*2*t,a))o=j>4,r=o?223:j&&315

Nov 10 2020 11:11 PM UTC

}// 139/140

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#uncompressed #symmetry

u/Xen

nice!
u/donbright

how.....

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pavel

remix of d/17888 by u/New_Core

function u(t) {

for(k=c.width|=0;j=--k>>6;x.fillRect(960+99*(2*C(j)+S(i*22))/z,540+(99*S(j)+i*S(v=i/69)*C(v-5*q))/z,4/z,8*S(4*v-4)/z))i=k%64,q=t+j,z=5-q/3%5

Mar 11 2020 7:08 PM UTC

}// 140/140

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Birds 2

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pavel

function u(t) {

for(c.width|=i=4;i--;x.fill(x.arc(96*(8+i%2*4+2*o+C(a=Math.PI*(o?q:-q))),540+96*S(a),96,0,7)))q=t+3*(i>1),x.beginPath(o='001221'[~~q%6]-1)

Jan 7 2020 11:54 PM UTC

}// 138/140

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Points

Show more comments…
u/pavel

Credit https://www.reddit.com/r/loadingicon/comment…
u/tylertoomey

Can you explain how you are declaring your variables? specifically in "8+i%2*4+2*o+C" you reference 'o' and 'C' before they have even been declared -- I think.
u/pavel

for(i=9;i--;/*code here*/)/*runs after code here*/
u/ivylab

Exactly the other way around, isn't it? First the code after the bracket runs and then the code in the brackets. Your declaration is behind them. c.width=1e3;for(i=9;i--;x.fillStyle='red')x.fillRect(112*i,0,100,1000) shows that too.
u/sigveseb

Or in other words, a for loop for(A; B; C) D; will run the different parts in this order: A B D C B D C B D C .. B
u/ivylab

Exactly what I think and meant. Well written @sigveseb
u/joeytwiddle

beginPath, arc and do-si-do 🕺💃 🎻
u/UEZ

#dance

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