Hot 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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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

show FPS hide FPS share 2 remixes fullscreen

pavel

function u(t) {

for(c.width=960,p=Math.PI,r=270,k=64;k--;)for(r*=k%2||C(d),n=j=k%2?7+k>>1:99;j--;x.arc(480,270,r,a=2*d*j-p/2,a))d=p/(n-1)
x.fill`evenodd`

Jun 29 2019 11:20 PM UTC

}// 137/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Vertex sphere

u/pavel

Based on Mathologers shirt: https://www.youtube.com/watch?v=O1sPvUr0YC0
u/KilledByAPixel

👍
u/Xen

oooooo nice
u/pavel

With more layers the middle circle does not shrink to nothing, it asymptotically approaches about 11% of the radius

show FPS hide FPS share 2 remixes fullscreen

pavel

remix of d/14826 by u/KilledByAPixel

function u(t) {

for(w=j=c.width|=f=o=>500*C(q=22/7/(3+~~o*5%8))/C((a+t)%(2*q)-q);a=44/7*--j/w;x.arc(960,540,f(t+1)*e+f(t)*(1-e),a,a))e=(t%1)**9
x.fill()

Jun 29 2019 7:03 AM UTC

}// 136/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/13thptr

smooth
u/katkip

wooow
u/KilledByAPixel

I knew pavel would make it better. ;)
u/KilledByAPixel

https://imgur.com/MDGvSaU
u/donbright

amazing

show FPS hide FPS share 1 remix fullscreen

pavel

remix of d/14781 by u/KilledByAPixel

function u(t) {

P=2*Math.PI
t/=2
p=P/(3+~~t%5)
for(w=j=c.width|=0;j--;x.arc(960,540,500*(1+(C(p/2)/C(a%p-p/2)-1)/(1+1e5**C(P*t))),a,a))a=P*j/w
x.fill()

Jun 29 2019 3:01 AM UTC

}// 135/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/KilledByAPixel

Amazing!
u/katkip

too math for me

show FPS hide FPS share 1 remix fullscreen

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

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Rubik's Cube Movement

Show more comments…
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!

show FPS hide FPS share fullscreen

pavel

function u(t) {

for(c.width|=i=2;i--;)for(r=30;r--;i&&x.beginPath(x.stroke()))x.lineWidth=i?1:5,x.arc(960,540,18*r,i?0:a=t*r/4%(2*Math.PI),i?7:a);x.stroke()

Jun 12 2019 2:30 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

show FPS hide FPS share fullscreen

pavel

function u(t) {

for(i=c.width|=0;r=S(k=--i>>6)**2;x[i%64?'fillRect':'clearRect'](7-k/4,0,r,r))x.setTransform(99,0,0,42,960,32*k+(i%64*r||3)),x.rotate(3*t+k)

Jun 7 2019 6:27 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#box #tornado #d3

u/aleamb

amazing!
u/donbright

how the....
u/KilledByAPixel

❒
u/vain

hard to believe... top!

show FPS hide FPS share fullscreen

pavel

function u(t) {

with(x)for(i=4;i--;fill())for(beginPath(j=4),fillStyle=i?R(a=128+50*S(~i%3+13*t),a,a):'#868';a=j--/.64;)arc(960,536-~i%3*5,i<3?300:3e3,a,a)

Jun 6 2019 4:36 AM UTC

}// 139/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

The Perpetual Diamond #illusion

Show more comments…
u/pavel

Contrast Reversals Along Thin Edges Create the Appearance of Motion in Objects
u/pavel

https://doi.org/10.1177/2041669518815708
u/katkip

Wow
u/metamero

beautiful!!! #opticalillusion
u/SMON

It's grest but cannot hold a candle to some of your other works. :)
u/agshapiro

love it!

show FPS hide FPS share fullscreen

pavel

remix of d/14464 by u/katkip

function u(t) {

for(x.setTransform(1,0,0,1,960,540),x.rotate(S(2*t)),i=200;i--;x[j?'fillRect':'clearRect'](r=(18+j)*(i&-2),r,r*=C(t)*.7-2,r))j=i%2

Jun 7 2019 5:01 AM UTC

}// 130/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#d3 #perspective #pyramid

u/pavel

Am I crazy or do the sides rainbow a little?
u/katkip

It's an illusion maybe
u/joeytwiddle

Could be the way your machine talks to the monitor? https://en.wikipedia.org/wiki/Subpixel_rende… Or could be you are crazy!

show FPS hide FPS share fullscreen

pavel

remix of d/14376 by u/pavel

function u(t) {

t?x.arc(w=960,h=540,h,0,c.width|=0):X=Y=1e3
X*X+Y*Y>2.4e5&&(r=C(t*t)*8+12,U=-X/r,V=-Y/r)
X+=U;Y+=++V;x.arc(w+X,h+Y,5*r,0,7);x.fill`evenodd`

Jun 6 2019 5:00 AM UTC

}// 139/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#physics #bounce updated so ball size reflects speed

show FPS hide FPS share fullscreen

pavel

remix of d/14422 by u/KilledByAPixel

function u(t) {

for(i=c.width|=0;j=--i>>5;x.fillRect(i%8*270-Y%2*128-j,Y*140-j-420*h*(h>0),256,128))Y=i%64>>3,h=66-i%64-3*t,x.fillStyle=R(1e3/(4+i%3+j))

Jun 5 2019 6:59 AM UTC

}// 136/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#wall #uncompressed

u/KilledByAPixel

All in all, it's just another dweet in the wall.
u/13thptr

amazing

dwitter.net | pavel (7290)