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) {

f=(n,x,y)=>n<1&x*x+y*y<4?f(n+.01,x*x-y*y-X/1e4-1.65,2*Math.abs(x*y)+Y/1e4-.09):n
for(i=3e4;i--;x.fillRect(X=u&2047,Y=u>>11,1,f(0,0,0)))u=-~u

Jul 24 2022 4:34 PM UTC

}// 140/140

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Burning Ship

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u/pavel

#burningship #fractal
u/rodrigo.siqueira

Incredible!I've just seen a discussion about this Burning Ship Fractal on Hacker News: https://news.ycombinator.com/item?id=32210140
u/cantelope

looks more like a black cat caught in a spider's web to me
u/danny@hille.dk

f=(n,x,y)=>n<1&x*x+y*y<4?f(n+.01,x*x-y*y-X/1e4-1.7,2*Math.abs(x*y)+Y/1e4-.08):n for(i=3e4;i--;x.fillRect(X=u&2047,Y=u>>11,1,1,x.fillStyle=hsl(${(m=f(0,0,0))*60+200},99%,${m*200}%))u=-~u
u/rep_movsd

Amazing
u/rep_movsd

Amazing
u/rep_movsd

I have an NFT based on this where I manually hunted for interesting patt patterns at anywhere from 100x to 10 trillion X zoom. there are literally infinite variations
u/rep_movsd

Some locations in this https://imgur.com/gallery/XQR8tNw

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pavel

remix of d/23829 by u/pavel

function u(t) {

for(c.width=w=128,i=n=9088,t?a[n*t**3&127]=1:a=[],m=a.includes(0,-w);i--;a[i]=t?p&a[r=i+w]<1?a[r]++:r<n|m&&p:0)x.fillRect(i%w,i>>7,1,p=a[i])

Sep 16 2021 3:53 AM UTC

}// 140/140

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#tetris #snow

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u/KilledByAPixel

Genius.
u/Joachim

Wow. This is very clever
u/rodrigo.siqueira

Now I can't look at city buildings without thinking about this. See https://en.wikipedia.org/wiki/Tetris_effect The Tetris effect (also known as Tetris syndrome) occurs when people devote so much time and attention to an activity that it begins to pattern their thoughts, mental images, and dreams. E.g. People who have played Tetris for a prolonged amount of time can find themselves thinking about ways different shapes in the real world can fit together, such as buildings on a street.
u/Xen

love it!
u/magna

Fun to watch! :)
u/tomxor

@rodrigo I think I have The Dwitter Effect, or "Dwitter Syndrome" :D i'm not even joking
u/sigveseb

Nice idea! As an added bonus, if you leave it running for a while you get a graph of the prng bias for free :)

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pavel

function u(t) {

for(i=c.width|=0,q=(t%1)**5;i--;x.fill(x.arc(960+p(1),540+p(6),(i%2||q)*90,0,7)))x.beginPath(p=m=>((i>>m)%32-16)*90*(t+m&1?(1+q)*(1+i%2):2))

Jun 1 2020 4:22 AM UTC

}// 140/140

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https://twitter.com/concinnus/status/1265689…

u/KilledByAPixel

it actually has one of your dweets in it :)
u/katkip

smooth

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pavel

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼👦👧🐾𚁫𙐱𝠦𙠱𚱫𙐲𚠮𝀱𝀩𚡧𚁡🐮𝰸𝐴𚠨𪰫𜠯𚀱𚰱𩐳𚠪𚁴𙐱𚠴𛑩𚐩𚐩𛁫🐵𝰻𪐽𛐭𪰾🠴𞱸𛡦𪑬𫁒𩑣𭀨𞐶𜀫𝰰𜀪𦀯𮠭𬰬𝐴𜀫𝰰𜀪𦐯𮠭𬰬𬰪🐲𛁳𚐩𦱘𛁙𛁚𧐽𦱘👦𚁃𚐬𪐭𜠬𩠨𤰩𛁘𛁩𛐲𧐮𬱬𪑣𩐨𭀥𜰩𛁺🐳𚱚𛁳🐹𞐯𮠯𮠻`.replace(/u../g,'')))

Jun 19 2019 3:43 AM UTC

}// 139/140

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Rubik's Cube Movement

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u/pavel

191 for(c.width|=f=g=>(k%16&&1+k%2*.414)*g(a=.7854*(k+2/(1+1e3**(t%1*4-i)))),k=57;i=--k>>4;x.fillRect(960+700*X/z-s,540+700*Y/z-s,s*=2,s))[X,Y,Z]=[X=f(C),i-2,f(S),X,i-2].slice(t%3),z=3+Z,s=99/z/z
u/katkip

too good.
u/username

Rubik's Cubes cannot move the middle layer
u/pavel

If you hold the sides the middle moves, no? How could it not!
u/pavel

Here are notation-only moves for(c.width|=f=g=>(k%16&&1+k%2*.414)*g(a=.7854*(k+y*2/(1+1e3**(t%1*4-i)))),k=57;i=--k>>4;x.fillRect(960+700*X/z-s,540+700*Y/z-s,s*=2,s))[X,Y,Z]=[y=i-2,X=f(C),f(S),y,X].slice(t%3),z=3+Z,s=99/z/z
u/username

Technically you are moving both sides at the same time in that case instead of moving the middle layer.
u/katkip

^
u/pavel

That's not what technically means. You have a mental model that only permits sides to move, and you have that model because adding middle rotations would be notationally redundant in that model. This does not mean middle rotations are somehow impossible or that they definitely consists of two side rotations.
u/username

Erm, the middle layer is attached to the core, that is what I mean. It is about the construction of a Rubik's Cube.
u/username

http://www.madehow.com/images/hpm_0000_0007_…
u/pavel

Still seems like this is a matter of perspective. You are chosing a perspective in which the core is always fixed, even though the motion I am describing specifically involves holding the two sides fixed and rotating the core... In my reference frame the core is rotating. So what if the core contains more parts than the side pieces when you take the cube apart?
u/13thptr

that escalated quickly
u/donbright

maybe they dont actually move like this... but they should!

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pavel

function u(t) {

for(k=2e3;i=S(t+k),j=S(i*k--);f&&x.fillRect(960+540*i,540*++j,9,4))d=1-i*i-j*j,f=d**.5*2-i-j,x.fillStyle=R(g=8*f**3,g,g+28*f,1-.05/d)

Feb 28 2019 7:26 PM UTC

}// 133/140

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pavel

function u(t) {

with(x)for(r=i=641;j=--i>>6;r=!fillRect(r,r,r*=-2,r))setTransform(w=256,0,0,120,960,w+i),fillStyle=R(a=r-!rotate(t*(j-9)/2-4)?99:w-i%64,a,w)

Dec 31 2021 1:16 AM UTC

}// 140/140

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Ice flow, nowhere to go

u/pavel

Inspiration: reddit.com/r/blender/comments/rrxtip
u/joeytwiddle

Title inspiration: https://youtu.be/AI6mM3an6n4

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pavel

function u(t) {

with(x)for(i=w=t?0:2e3,h=540;y=h*S(i*i--);beginPath(fill(rect(690,491,h,98))))ellipse(i,h+y,2,20,Math.atan2(y-(i-720)*(i-1200)/y,2*i-w),0,7)

Aug 19 2021 6:31 PM UTC

}// 140/140

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#magnet

u/tomxor

Perfect
u/danny@hille.dk

very nice indeed
u/tomxor

And considerate t?0:2e3 :D

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pavel

remix of d/23223 by u/rep_movsd

function u(t) {

for(k=c.width|=0;j=--k>>5;x.fillRect(960-((2*t+j*j)%z*2-z)*s,1080,s,j%6*-s-99))z=9+j/2,s=2e3/(z+k%32/42),x.fillStyle=R(a=s-k%32*3,a,a)

Jun 25 2021 10:53 PM UTC

}// 134/140

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u/rep_movsd

Clever drawing different Z in different colors so there is no need to draw a border
u/katkip

#parallax

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pavel

function u(t) {

for(x.beginPath([X,Y=X,r=X]=t?d.shift():d=[666]),i=4;i--;i&&d.push([X+p/2,Y-q/2,r/2]))p=r*S(b=i*2.094),q=r*C(b),x.lineTo(X+p,Y-q);x.stroke()

Jan 17 2020 3:48 AM UTC

}// 140/140

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Incremental #sierpinski

u/katkip

#fractal
u/Cloud

Wow! Nice fractal!

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pavel

function u(t) {

for(i=c.width|=m=0;i--;m=1)x.globalAlpha=.3+m/3,z=C(i*i)-1.07,x.fillRect(m&&960*(z+2-(i**.2+t/3)%4)/z,540-m*32/z,s=m?i%9/z:2e3,32*s)

Jan 3 2020 1:46 AM UTC

}// 132/140

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Train ride

u/KilledByAPixel

👍
u/katkip

#perspective

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