Dweets awesomed by u/tomxor

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: #Food

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rodrigo.siqueira

remix of d/17937 by u/tomxor

function u(t) {

c.style.filter=`blur(2vh)contrast(6e2%)`
for(c.width=128*5,i=6e3;i--;)x.fillStyle=R(50),x.fillRect(5*(i&127),i>>4,5,(i**3>>6)/(6+t/6e4)&9)

Mar 13 2020 2:17 PM UTC

}// 138/140

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#blood #cell #coronavirus attack

u/katkip

scary
u/tomxor

😱
u/aleamb

wow!!

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tomxor

remix of d/17936 by u/tomxor

function u(t) {

for(c.width=128,i=1e4;i--;)x.fillRect(i&127,i>>7,1,(i**3>>6)/(6+t/1e6)&1)

Mar 13 2020 2:20 AM UTC

}// 73/140

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u/joeytwiddle

Eternal battle between the black ants and the white ants
u/DataMeta

!!

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tomxor

function u(t) {

for(c.width=128,t/=2,i=1e4;i--;)x.fillRect(i&127,i>>7,1,(i**3>>t)/(6+t**2/1e7)&1)

Mar 13 2020 2:12 AM UTC

}// 81/140

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BriSeven

remix of d/17920 by u/BriSeven

function u(t) {

s=255,S=64;d=5e2/S
for(i=0;i<S;i++)for(j=0;j<S;j++)c=C(i/d/2)*C(j/d+C(j/5+t)),x.fillStyle=R(b=-(c*S+6)*s,-b,-b),x.fillRect(i*d,j*d,d,d)

Mar 13 2020 1:33 AM UTC

}// 135/140

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lava lamp behind the scenes.

u/BriSeven

from here you can modify i*d and j*d to make whatever bulb shape you want.

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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

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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

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DaSpider

remix of d/17902 by u/BriSeven

function u(t) {

c.width=700
for(i=8;i--;){
x.font=i+'em a'
x.fillText(['🚛','🚑','🚒','🚚','🚐','🚙','🚕','🚗','🚓'][i+(_=~~(t/2))%3],620-(i/2*t*512&1023),10*i**2)
}

Mar 12 2020 8:27 PM UTC

}// 140/140

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replacing x.fillText([...'🚛🚑🚒🚚🚐🚙🚕🚗🚓'][i+(_=~~(t/2))%3],620-(i/2*t*512&1023),10*i**2) saves a few chars

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katkip

function u(t) {

c.width=700;for(i=999;i--;)s=99+S(i*.00157)*i/20*S(i%2+2.6)+S(i**9/9e24/6)*.01*i,x.fillText((i*t)&1,350+C(i*(q=.0062)+t)*s,200+S(i*q+t)*s)

Mar 12 2020 6:27 PM UTC

}// 138/140

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Binary Jörmungandr #ouroboros - XaTuring's physical form

u/katkip

#illusion : doesn't get smaller and smaller but that's the effect if you stare at it
u/joeytwiddle

Mmm delicious: me!

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katkip

function u(t) {

c.width=200;for(j=4;j--;)for(i=899;i--;)x.fillRect(99+C(i+t)*(40+S(i*2+999/j)*15*j),50+S(i*2+t-j)*(30+S(100/i-j*1 )*5*j-i/99),1,S(j+t+i/2))

Mar 12 2020 4:28 PM UTC

}// 139/140

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Random thing I've made with XaTuring's help as a test

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navinate

remix of d/17918 by u/navinate

function u(t) {

for(j=0;j<9;j++){for(i=99;i--;){x.fillRect(i*20,j*120+(t*j)*T(i%2?-i:i),20,120);x.fillStyle=R(255-i*2,255-j*28,j*28)}}

Mar 12 2020 5:00 AM UTC

}// 118/140

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Rainbow Drip

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New_Core

function u(t) {

for(c.width|=j=9;j--;)for(i=60;i--;x.fillRect(960+j*Z*50*S(j)+(99*S(i*22)*Z),540+i*S(v=i/60)*C(v-t*3+j)*Z,Z*2,Z*9*S(i/16-4)+5))Z=2**T(t/5+j)

Mar 10 2020 4:22 PM UTC

}// 140/140

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Birds

Show more comments…
u/13thptr

amazing #d3
u/Whimpers

wow
u/tomxor

woo!
u/yonatan

lifelike!
u/Odog8

daaaamn
u/joeytwiddle

bravo! #bird #nature
u/katkip

nice
u/vain

i really love this

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