Dweets awesomed by u/Piggo

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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pavel

function u(t) {

for(i=c.width|=0;j=--i>>5;x.fillRect(960*(z+S(j*j)+r*C(i))/z,3e3*(.2+m*(m<0&&-1)**i)/z,s=--m*9/z,s))m=(t+j/7)%2-1,r=m>0&&m/3,z=2+S(j)+r*S(i)

Mar 25 2020 8:28 AM UTC

}// 140/140

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Reflections on #rain

u/katkip

beautiful
u/aleamb

amazing
u/vain

amazing rain drop fx

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KilledByAPixel

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁴🱔🐳𝰵𞡳𨱡𫁥𚀹𛀹𚐻𥀭𛐻𨡥𩱩𫡐𨑴𪀨𩡩𫁬𚀩𛁳𭁲𫱫𩐨𚐩𚑦𫱲𚁫🐵𞱫𞱦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𤰨𥀩𚠹𚰲𞑽𘀹𞐥𙁻𝠵𚰱𞐪𤰨𦀪𦀫𭀩𯐥𨀩𦐽𥀥𜐵𚰨𪰥𝀼𜠩𛁘👔𛰱𝐫𚀭𛑫𙐴🀲𚑼𜀬𫁩𫡥𥁯𚁘𚠹𚱓𚁘𚠽𦐩𚠲𛐶𛁙𚠹𚱓𚁘𚱴𚐪𜠭𝰩`.replace(/u../g,'')))

Mar 25 2020 5:07 AM UTC

}// 140/140

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Stained #Glass

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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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gpolonus

function u(t) {

t?0:b=17.3
onmousemove=e=>b=e.x/15
f=(a,y)=>(x.fillStyle=a%2?'#dee':'#abb',x.fillRect(a,y,9,9))
for(i=0;i++<2e3;)f(i,S(t+i/100*b)*540+540)

Mar 12 2020 2:04 AM UTC

}// 138/140

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Interactive argyle #interactive

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Whimpers

function u(t) {

for(i=0,k=2e3;i<k;x.fillRect(i?(1e2*t+i)%k:0,i?500+1e3*S(i*i):0,K=i++?S(i)*9:k,K))x.fillStyle=R(a=i?S(i-t)*255:0,a,a,i+.4)

Mar 9 2020 3:43 PM UTC

}// 122/140

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Starry Night.

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gpolonus

remix of d/17830 by u/gpolonus

function u(t) {

c.width/=1
onmousemove=e=>c.a=e.x/15
f=(a,y)=>x.fillRect(a,y,9,9)
for(i=0;i++<2e3;)f(i,S(t+i/100*(c.a||0))*400+500)

Mar 8 2020 1:53 PM UTC

}// 115/140

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Variable Sine wave frequency. Move your mouse! #interactive

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katkip

function u(t) {

eval(unescape(escape`𪑦𚀡𭀩𮱱👛𧐻𩡯𬠨𪐽𞐹𞱩𛐭𞰩𬐮𬁵𬱨𚁻𮀺𞐶𜀬𮐺𝐴𜀬𨐺𪐪𜀮𝠹𯐩𯑦𫱲𚁩🐱𞐻𪐭𛐻𚑦𫱲𚁯𘁯𩠠𬐩𮱸𛡦𪑬𫁒𩑣𭀨𫰮𮀬𫰮𮐬𝐬𝐩𛁯𛡸𚰽𠰨𫰮𨐩𛁯𛡹𚰽𤰨𫰮𨐩𞱩𩠨𩡲𨑭𩐥𜠲🐽𜀩𫰮𨐫👯𛡡𛰹𞐹𯐻𮀮𩱬𫱢𨑬𠑬𬁨𨐽𛠱`.replace(/uD./g,'')))

Mar 3 2020 8:37 PM UTC

}// 131/140

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gpolonus

function u(t) {

f=(a,y)=>x.fillRect(a,y,9,9)||f
t||c.addEventListener('mousemove',e=>((a,y)=>f(a,y)(2e3-a,1e3-y)(a,1e3-y)(2e3-a,y))(e.x*3.4,e.y*3.4))

Mar 3 2020 7:17 PM UTC

}// 133/140

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Shorter 4 mouse cursors

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Cloud

remix of d/17584 by u/New_Core

function u(t) {

c.style.filter=`blur(9px)contrast(15)`
for(c.width|=i=9;i--;){x.fillStyle=R(99,40)
x.fillRect(960+600*S(t/3+i),440+400*C(t/3+i/.6),200,200)}

Feb 15 2020 10:25 AM UTC

}// 140/140

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#magma

u/katkip

wow!

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andrea270872

function u(t) {

c.width|=0
for(k=(t%18)**3,i=0;i++<144;x.beginPath()){
x.arc(900+S(i%6+t/6)*k,500+C(i%6+t/6)*k,((t%18+i/144)*.5)**4,0,7)
x.stroke()}

Feb 11 2020 2:38 PM UTC

}// 132/140

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"growing thru v2" #growth

u/Xen

love it!

dwitter.net | Piggo (5379)