Dweets awesomed by u/sChiab8

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 fullscreen

GreenBeans

function u(t) {

for(i=0;i<60;i++){x.fillText('beans',500+i*20*C(t+i),550+i*20*S(t+i));x.fillStyle=R(99*S(t+i),115*S(t+i/5),);x.fill();x.font=360+"px Arial"}

Jun 12 2020 5:17 PM UTC

}// 140/140

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

u/katkip

b e a n s
u/GreenBeans

y e s

show FPS hide FPS share fullscreen

chrispie

remix of d/19077 by u/chrispie

function u(t) {

for(i=2e3,f=(X,Y,n=0)=>Y<9?f(X*X-Y*Y-.8,2*X*Y+.6,n+.3):x.fillStyle=`hsl(${i/2},99%,${n*n*9}%`;i--;x.fillRect(i,t*60,1,999))f(i/480-2,1-t/9)

Jun 10 2020 4:06 PM UTC

}// 139/140

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

flowery

show FPS hide FPS share fullscreen

tomxor

function u(t) {

t>1&&eval('U='+parent[c.style=9*u.r|reset()].u);U(t);if(t%1>.8)for(c.width=128,i=1e4;i--;)x.fillRect(i&127,0|i/120-t*4,1,u.r=Math.random())

Mar 13 2020 1:15 AM UTC

}// 139/140

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

Dwitter Vision

Show more comments…
u/Xen

love the idea
u/DaSpider

ReferenceError: U is not defined
u/KilledByAPixel

how is this possible?
u/tomxor

All loaded iframes are enumerated on the window object (for any webpage), the value is the window object of the corresponding frame... and from inside a dweet this can be accessed (with restrictions) by going to the parent frame, then you have access to any globals in that other frame. While you can't call a function since it's in a different JS context, you can read it's source and re-evaluate it.
u/tomxor

essentually window.parent[n].u is the function created by dwitter for dweet n on the page, if you add it to a string it calls toString which returns the source, you can eval this and assign it to something to run in this context.
u/tomxor

I think I am the most verbose person here sorry :/
u/jellyedwards

Wow that's amazing!
u/jellyedwards

Very nice presentation of that little trick
u/katkip

nice trickery. #exploit #trick #hack
u/sigveseb

Woah

show FPS hide FPS share fullscreen

tomxor

remix of d/17835 by u/pavel

function u(t) {

eval(unescape(escape`𫱮𫑯𭑳𩑭𫱶𩐽𩐽🡦𚁸𛡬𪑮𩑗𪑤𭁨🐴𛀴𛁣𛡷𪑤𭁨👩𫡮𩑲𥱩𩁴𪀬𤠽𩐩𒡦🐨𦀬𦐬𭰩🐾𚁒𛡸𛑘𛑷𛰲𚐪𚠲𚰨𤠮𮐭𦐭𭰯𜠩𚠪𜠼𭰪𭰪𝠮𜠸𚰳𩐴🱷🠶𙠦𩠨𦀬𦐬𭰯🐲𚑼𩠨𦀫𭰬𦐬𭰩𯁦𚁘𛁙𚱷𛁷𚑼𩠨𦀫𭰬𦐫𭰬𭰩𞡸𛡳𭁲𫱫𩑒𩑣𭀨𦀬𦐬𭰬𭰩`.replace(/u../g,'')))

Mar 5 2020 2:17 AM UTC

}// 135/140

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

#interactive #quadtree (move your mouse)

u/tomxor

Note the intersection is fuzzy since full circle-AABB takes too much code, instead it's just circle-point + current subdivision width based radius (w*w*6.28), i.e it becomes more accurate as it converges.
u/tomxor

This is why there are a bunch of divisions around it that would not exist with an exact test. Pavel's doesn't do this by cleverly choosing a geometry that only need intersect the top left of each square.
u/katkip

Nice!

show FPS hide FPS share 2 remixes fullscreen

pavel

function u(t) {

c.width|=f=(X,Y,w)=>X*X+Y*Y<=2e6*S(t/9)**2?w>9&&f(X,Y,w/=2)|f(X+w,Y,w)|f(X,Y+w,w)|f(X+w,Y+w,w):x.strokeRect(X,Y,w,w);f(x.lineWidth=4,4,1072)

Mar 4 2020 5:31 AM UTC

}// 140/140

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

Quadtree

Show more comments…
u/katkip

Awesome!
u/tomxor

I love it !
u/sigveseb

Cool!
u/Xen

SEXY!
u/aleamb

love it!
u/tomxor

#Quadtree
u/Qwitter

YES!!
u/vain

Never saw this fx before. But it looks really beautiful

show FPS hide FPS share 2 remixes fullscreen

New_Core

function u(t) {

for(c.width|=i=640;i--;x.stroke())x.beginPath(),x.strokeStyle=`hsl(${i},99%,50%)`,x.arc(99*S(t-i/9)+i*3,i%160*8-99,a=99**C(i/14+t)+14,a,0,7)

Mar 3 2020 6:14 PM UTC

}// 140/140

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

u/katkip

looks good!
u/aleamb

amazing!

show FPS hide FPS share fullscreen

rodrigo.siqueira

remix of d/17748 by u/katkip

function u(t) {

c.style.filter=`sepia(`
P=(θ,R)=>x.fillRect(S(θ/5)*R+960,C(θ/5)*R+540,.6,1)
for(q=z=i=3e3;i--;)P(S(q)*9,C(z/3)*485),q+=C(z+t/z),z+=S(q*15-z)

Feb 26 2020 3:03 PM UTC

}// 140/140

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

Chaotic flower #mandala

show FPS hide FPS share 3 remixes fullscreen

katkip

function u(t) {

P=(θ,R)=>x.fillRect(C(θ/30)*R+960,S(θ/30)*R+540,1,1)
t||(q=z=0)
for(i=2999;i--;)P(S(q)*100,C(z)*200+300),q+=C(z-1),z+=S(q*9-z)

Feb 25 2020 8:16 PM UTC

}// 126/140

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

Chaotic flower #chaos

u/Xen

niice

show FPS hide FPS share fullscreen

rodrigo.siqueira

remix of d/17650 by u/rodrigo.siqueira

function u(t) {

v=(a,b,Φ,r)=>{for(i=~r;i++;x.fillStyle=R(Φ*99,Φ*40))x.fillRect(a+=S(Φ),b-=C(Φ),r/9,1);while(r>9)v(a,b,Φ+S(r*a)/2,r*=.6)}
v(1e3*t,2e3,0,780)

Feb 17 2020 2:28 PM UTC

}// 139/140

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

Dry shrubs #growth

show FPS hide FPS share fullscreen

pavel

function u(t) {

for(i=c.width|=f=g=>22/7/(1+1e3**g(2*t+i%32/16));i--;x.fillText('dn',-6,3))x.setTransform(6,0,0,6,6*i+i%2*96,i%32*96-f(S)*61),x.rotate(f(C))

Feb 13 2020 8:21 AM UTC

}// 140/140

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

up / dn #beesandbombs

u/pavel

https://beesandbombs.tumblr.com/post/1674924…
u/pavel

Not quite the same due to golfing but still looks good I think
u/andrea270872

Amazing. I could swear that the letters are bending... which is impossible! Wow!
u/eduft15

Amazing!

dwitter.net | sChiab8 (2402)