Dweets awesomed by u/jellyedwards

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/17953 by u/tomxor

function u(t) {

c.width=-1;for(i=2e3;m=i&1,v=(K=t%2)<1?25:K%1*99**1.1,p=i%3*3,i--;)x.fillRect(150+p*S(P=i**.7)+v*C(V=i**.5+t),78+p*C(P)+v*S(V)*C(!p*i),1,1)

Mar 16 2020 11:30 AM UTC

}// 139/140

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Blowing The Enemy #coronavirus

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u/WorldMerge

This is really cool! Does setting the canvas width to -1 make it full-width?
u/rodrigo.siqueira

c.width=-1 is a trick I saw here (probably from u/pavel) that makes width=300 pixels. I used throw(c.width) to see "300". So it's a compact form to create a medium-low resolution image.
u/tomxor

300px is the default canvas width. What's particularly odd is that while setting negative numbers causes default value, everything else that ordinarily coerces to NaN will result in 0. e.g throw Number({}).toString() // NaN c.width={}; throw c.width.toString() // 0
u/tomxor

I guess in c++ land width has outofrange=300 and NaN=0
u/katkip

looks good
u/katkip

but dangerous

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tomxor

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪀽𜐸𜀻𨰮𬱴𮑬𩐽𙱦𪑬𭁥𬠺𨡬𭑲𚀱𬁸𚑩𫡶𩑲𭀨𙰻𩡯𬠨𭀯🐱𜠬𪐽𜱥𜰻𫐽𪐦𜐬𭠽𜐶𛑭𚠲𛁰🐵𚠨𪐥𝀸🀱𞀩𛁩𛐭𞰩𮀮𩡩𫁬𤡥𨱴𚁭𚠵𜀫𞀰𚱰𚡓𚁐👩𚠪𛠷𚱴𚐫𭠪𠰨𥠽𪐪𚠮𝐫𭀭𭀪𫐪𜐮𝐩𛁭𚠲𜀫𝀰𚱰𚡃𚁐𚐫𭠪𤰨𥠩𚡃𚀡𬀪𪐩𛀱𛀮𝰭𫐪𛠵𚐻`.replace(/u../g,'')))

Mar 15 2020 12:14 AM UTC

}// 140/140

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The Enemy

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u/tomxor

#coronavirus
u/sigveseb

Incredible!
u/katkip

This is extremely #realistic. I'm scared.
u/joeytwiddle

Good render! #virus #organic Here is a great 1 hour documentary about viruses: https://www.dailymotion.com/video/x6agslv
u/aleamb

amazing! fucking amazing!
u/DataMeta

wow, fantastic!
u/KilledByAPixel

😷 Even Dwitter is not safe!
u/Odog8

how though???
u/lionleaf

Insane!
u/lionleaf

I didn't even notice that it was animated at first :O
u/Cloud

#koronavirus
u/vain

What? How does this work? I am speechless... (incredible animated corona/cell)

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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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KilledByAPixel

function u(t) {

for(i=16+t|0,z=99;z--;x.fillRect(i%16*119+65+(29+9*S(z*S(i)/9))*C(a=t%1*6-1),175*(i>>4)-z+z*S(i*i)/3-9*S(a),6,3))x.globalAlpha=.02+C(z*i)/99

Mar 13 2020 5:16 AM UTC

}// 140/140

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Procedural Glassware #Glass

u/pavel

126 for(i=16+~~t,z=99;z--;x.fillRect(i%16*119+65+9*(3+S(z*S(i)/9))*C(a),175*(i>>4)-z+z*S(i*i)/3-9*S(a),6,.1+C(z*i)/16))a=t%1*6.2-1
u/KilledByAPixel

nice tricks pavel, it is not quite the same tho
u/Xen

nice

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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

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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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yonatan

function u(t) {

c.width=-1
for(i=800;i--;x.beginPath(x.stroke()))x.ellipse(150,85+C(m=i)*50,r=69+50*S(m=i),r/3,0,t,9+t),x.setLineDash([r/9])

Mar 11 2020 11:12 AM UTC

}// 124/140

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u/13thptr

#torus #illusion

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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

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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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jylikangas

function u(t) {

//TBD: remove comments
for(W=i=688;i--;x.clearRect(W+q*C(u=i*W+t)/T*W,W+(4+C(t))*S(i)/T*W,T=q*S(u)+9,T))x.fillRect(0,i*2,2e3,1.3),q=6+5*C(i)

Mar 9 2020 5:14 PM UTC

}// 140/140

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Torus at the Discoteque

u/rodrigo.siqueira

I am inside a #torus. It reminds your previous #d3 https://www.dwitter.net/d/8707 and also this rotator https://www.dwitter.net/d/13254
u/jylikangas

I did this from scratch and managed to implement a torus in much smaller space than last time. Notice the little ghost effect trick. There's still 22 bytes left but I felt the demo was ready.
u/ivylab

Whoaaaaaaa, so nice, I love this. Futuristic. Motion blur too. Great job!
u/katkip

nice!

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rodrigo.siqueira

remix of d/11421 by u/pavel

function u(t) {

j=t?j%6e3:P=[]
for(w=i=150;i--;c.width=-1)P[j++]=[45,9-S(i)*T(i*t)]
P.map((p,i)=>x.fillRect(w+9*S((i%w)+t)*(g=w/p[0]--),p[1]*g,s=g/7,s))

Mar 9 2020 3:44 PM UTC

}// 136/140

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Swarm of pebbles on the dirt #road. #particles

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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.

dwitter.net | jellyedwards (41537)