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(c.width=w=480,i=999,f=g=>S(i)*g(t)+r*S(i*w)*g(t+8);i--;x.fillText('#=*-.'[z-9|0]||'',240+w*f(S)/z,135+w*r*C(i*w)/z))r=2+C(i),z=15+2*f(C)

Mar 25 2020 4:10 AM UTC

}// 140/140

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#ascii #donut

u/Odog8

Hmm, I' m intrested in how this works?

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pavel

function u(t) {

for(x.fillRect(0,0,i=640,i);z=--i**.3;x.fillStyle=R(0,500/--z))x.setTransform(s=20/z,0,0,s,0,0),x.fillText('マトリックス'[i%6],i%z*99,t++%z*60)

Apr 26 2019 8:01 PM UTC

}// 137/140

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What is The #Matrix? v1

u/artfarnaa

Awesome.

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pavel

remix of d/11016 by u/pavel

function u(t) {

for(w=i=c.width|=q=C(t);j=--i/w;x.fillRect(960+(o*q-l*S(t))*w/z,540+S(a)*w*r/z,s=1e3/z/z,s))r=3+j*C(i),o=S(i)*j,l=C(a=j*t)*r,z=14+o*S(t)+l*q

Nov 17 2018 7:40 AM UTC

}// 140/140

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Ouroboros

u/katkip

haha cool
u/fourier.space

This one gets really good after it eats itself for the 20th time and dissociates into snake gas
u/katkip

ew
u/BirdsTweetCodersDweet

Awesome!

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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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pavel

function u(t) {

for(c.width=960,j=8;j--;)for(i=20;i--;)x.arc(480,270,2**((i>>1)+i%2/2-j%2/2+t/3%1),a=(j+i%2)*Math.PI/4,a);x.fill()

Nov 10 2020 12:47 AM UTC

}// 114/140

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Infinite Triangles by MDWoolls

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pavel

function u(t) {

for(let i=1920,f=(x,n=420,a=0,b=0)=>a*a+b*b<n?f(x,n-1,a*a-b*b+x,2*a*b+.1133-t/4615):n/420;i--;)x.fillRect(i,180*t,f(i/8e5-.7467),3)

Apr 18 2020 5:59 AM UTC

}// 131/140

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(X=-0.7453, Y=0.1127, R=6.5e-4) section of the #mandelbrot set

u/pavel

This version draws 1x3 pixels to speed up rendering. for(let i=2e3,f=(x,n=420,a=0,b=0)=>a*a+b*b<n?f(x,n-1,a*a-b*b+x,2*a*b+.1133-t/13845):n/420;i--;)x.fillRect(i,60*t,s=f(i/8e5-.7467),s) looks better in fullscreen but is 3x as slow.
u/pavel

let and the automatic scoping of args in f makes this _really_ quick. I can increase the loop to 4e3 iterations and still have 60fps on my machine. Would be interesting to speed this up by rendering multiple rows per frame.
u/katkip

all dweets made by u/pavel are genius
u/Xen

godlike!
u/Qwitter

agreed !!!!

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pavel

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼👩🐳𝠻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚀭𞐹𛀰𛀱𞐸𛀱𞐸𚐩𪰽𚁩🠾𜐩𛐸𛑴𙐱𛁢👃𚁁👍𨑴𪀮𤁉𚠨𪐭𜐯𝀫𜐯𚀱𚰱𩐴𚠪𪰩𚐩𛁸𛡦𪑬𫁓𭁹𫁥👩𙐲🰧𘱄𡁄𙰺𙰣𝠶𝠧𛁸𛡳𩑴𥁲𨑮𬱦𫱲𫐨𨐽𤰨𠐩𛁢𛰲𛀭𨠬𨐯𜠬𞐶𜀫𪰪𜐳𜠬𝐴𜀭𪰪𝠶𛐱𞐸𛰨𜐫𪰪𚠴𚐩`.replace(/u../g,'')))

Jul 9 2019 4:35 AM UTC

}// 140/140

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The fit (https://www.reddit.com/r/perfectloops/commen…)

u/pavel

Simplified. Seems too hard to fit even into 194 chars.
u/pavel

194 for(c.width|=i=36;i--;x.fillRect(-99,0,198,198))k=(i>>1)-8-t%1,b=C(A=Math.PI*(i-1/4+1/(1+1e4**k))),x.fillStyle=i%2?'#DDD':'#666',x.setTransform(a=S(A),b/2,-b,a/2,960+k*132,540-k*66-198/(1+k**4))
u/aleamb

love it!
u/katkip

Love it too

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pavel

remix of d/13487 by u/KilledByAPixel

function u(t) {

for(i=t?c.width|=d=_=>u[j=q&-64|p>>6]=-!u[j]|1:(p=q=540,r=7,s=4);i--;)u[i]||x.fillRect(i?i%64*64:p+=r*=d(p+=r),i?i:q+=s*=d(q+=s),z=i?64:9,z)

Apr 27 2019 4:26 AM UTC

}// 140/140

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#breakout #tribute

Show more comments…
u/pavel

Had to make some visual sacrifices to get this #uncompressed
u/pavel

I discovered p+=r*=d(p+=r);q+=s*=d(q+=s) as part of messing around with this. Why does it work?
u/pavel

:)
u/KilledByAPixel

Oh wow, nice! That's the code that updates the position, velocity and applies collision for x and y. It needs to call the d function to check its colliding and also set the block to 1 if it does. It needs to check x and y separately so it knows which side to bounce off
u/pavel

Notice how d only takes one argument, and it ignores it.
u/KilledByAPixel

I see what you did there. So many great tricks in this one.
u/pavel

p+=r*=d(p+=r) the inner p+=r increments p and d ends runs with that value, however the outer p+= caches the old value of p so when d resolves the inner p+=r is silently ignored!
u/pavel

#physics

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pavel

function u(t) {

with(x)for(j=9;--j;)for(i=2<<j,f=6.28/i;i--;fill())for(beginPath(k=2);k--;fillStyle=i%2?'#fff':R())arc(960,540,k*190*j**.5,a=(i+t%2)*f,a+f)

Nov 23 2018 4:55 AM UTC

}// 139/140

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Black and white spinners #beesandbombs

u/katkip

1.5 dimension fidget spinner
u/BackendForth

Looks like a rotary encoder.

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pavel

function u(t) {

for(x.fillRect(x.globalAlpha=.04,0,i=4e3,i);r=--i>>9;x.clearRect(420+f(C),f(S),6,6))f=g=>540*(1+g(a=2.0944*i/2**r)+.7**r*(.3*g(a+3*t)-g(a)))

Apr 22 2022 4:47 PM UTC

}// 140/140

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#beesandbombs

u/pavel

From https://twitter.com/beesandbombs/status/1364…
u/donbright

neat

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