Dweets awesomed by u/electric-skeptic

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: #Opposites

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KilledByAPixel

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑳🐨𦀬𦐬𬠬𪐽𜀩🐾𮱦𫱲𚁦𪑬𫁓𭁹𫁥👫🰧𘱦𩡦𙰺𙰣𜀰𜀴𙰬𨡥𩱩𫡐𨑴𪀨𩡩𫁬𚁡𬡣𚁘𛁙𛁫🱲𞠲𩐳𛀰𛀷𚐩𚐻𪐼𜐫𬠯𝠻𪐫𚰩𭰽𪐪𬠬𘑫𯁲🠸𙠦𬰨𦀫𤰨𨐽𪐦𙠳𞐹𚡴𛱷𚱫𚐪𭰬𦐫𠰨𨐩𚡷𛰲𛁫𚰫🱲𚠨𛠲𛑃𚁫𚡫𚐯𝐩𞠶𞐩𯐻𬰨𞐶𜀬𝐴𜀬𪰽𜀩`.replace(/u../g,'')))

Jan 25 2020 11:56 PM UTC

}// 139/140

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Mini Solar System #space

u/KilledByAPixel

#orbit

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pavel

function u(t) {

with(x){for(i=c.width|=0,q=1-t%2,fillStyle='#09f',scale(5,5);a=--i>>5;rect(180+24*(a*q-9*q+b),24*(a-b*q)-119,22,22))b=i%32-9;fill(stroke())}

Jan 25 2020 8:17 PM UTC

}// 140/140

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Windmill #tiling

u/pavel

Inspired by the Mathologer video https://www.youtube.com/watch?v=DjI1NICfjOk

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tomxor

remix of d/10534 by u/tomxor

function u(t) {

eval(unescape(escape`𨰮𬱴𮑬𩐽𙱦𪑬𭁥𬠺𪑮𭡥𬡴𚀱𙰻𩡯𬠨𨐽𨠽𤀽𜰮𜐴𛁩🐱𩐴𞱰👩𙠴𛁳🐲𝀰𚱰𚡡𚠳𝐬𪐭𛐻𨐫🐨𚁴𚡩𛱢𙠱𚐭𨐫𨠪𤰨𨐪𤀩𚐯𜠬𨠫🐨𛑡𚡢𚱃𚁡𚡐𚐩𛰲𚑸𛡦𪑬𫁒𩑣𭀨𞀸𜀫𬰪𤰨𦐽𨠪𤀫𬀪𨠪𞐩𚡃𚀡𬀪𨐪𤀩𛀴𞐵𚱳𚡃𚁙𛑰𛰲𚐬𛠰𜰭𤰨𦐫𬀪𛠴𚐪𛠰𜰬𜐩`.replace(/u../g,'')))

Jan 18 2020 7:52 PM UTC

}// 140/140

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#space #planet not #saturn 2

Show more comments…
u/KilledByAPixel

👍
u/KilledByAPixel

can you link us to more info on these equations?
u/tomxor

i'm not sure i can, much of it is just from messing around here on dwitter, and all of the chaotic stuff i've been doing has evolved from some distant bifructation thing here ages ago. Which part are you interested in specifically? I can try to explain as far as I understand it.
u/tomxor

Assuming you are refering to the pattern rather than the mapping, it's essentially just a+=(R-a+b*S(a*P))/2,b+=(-a*b+C(a*P))/2 where i've generated R{0,1} deterministically with a basic LCG type PRNG that feeds off the variables themselves: t*i/b&1, everything else is mapping. For the pattern i've just been messing with the coefficients and number of itterations between fresh generation of R for my various other dweets, but ultimately it all started here d/15329 which I adapted from u/taupelink so maybe he can tell us what it's formal name is because I can't figure it out.
u/KilledByAPixel

thanks, i will look into it!
u/denzen

wow, amazing!
u/magna

wow!
u/denzen

a bit buggy in safari
u/tomxor

I can't see safari, but if it's anything like blink's renderer then the compositor seems to change it's bias torards ceiling into 256 for high alpha, at least when derived from antialiasing subpixel shapes as in this case. Firefox seems to be less biased and faster to boot, so the ring will dissappear around the back as it's supposed to as the pixel area approaches epsilon. These differences are inevitable when exploiting something as sensitive as antialiasing or downsampling.
u/rodrigo.siqueira

I'm trying to understand how the "R" part works in the equation. Do you know? I see it's a number that varies between a few values. Is it a sort of "radius"? Is it randomness important or can it be non-random? Why a constant doesn't work?
u/metamero

one of my favorites ever
u/tomxor

@rodrigo The R part (t*i/b&1) is just a smaller replacement for Math.random(), formally it's an LCG PRNG, informally it's a bunch of stuff I multiplied together modulo 2 that I found to be sufficiently unifom (it would be a terrible PRNG more generally if analysed in detail it's probably full of regularities).
u/tomxor

A replacement for 0|Math.random()*2 (floored) I meant to say.
u/rodrigo.siqueira

I was trying to understand what is the intuitive meaning of this value "0|Math.random()*2" in the equation. I am still not sure (and I am probably wrong) but It seems that adding this "R" value to variable "a" (X position), it will displace the image to the right or left and create a similar image. It seems that it also works as a radius (zoom factor).
u/tomxor

Well my intuition from my limited understand here is that it's kind of like a fork at each point in the path that [a,b] is taking, as long as R is uniform enough the bias in the function sort of emerges and makes [a,b] follow certain paths more than others... I imagine it like a stochastic marble rolling into certain grooves in a landscape, just goto roll enough marbles to start to see the grooves.
u/tomxor

Sounds a bit like 2d gradient descent O_o

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tomxor

remix of d/17222 by u/tomxor

function u(t) {

eval(unescape(escape`𨰮𬱴𮑬𩐽𙱦𪑬𭁥𬠺𪑮𭡥𬡴𚀱𙰻𩡯𬠨𨐽𨠽𬀽𜰮𜐴𛁩🐱𩐴𞱩𛐭𞱡𚰽𚁲𛑡𚱢𚡓𚁡𚡰𚐩𛰵𛁢𚰽𚀭𨐪𨠫𠰨𨐪𬀩𚐯𝐩𪐦𜐦𙡸𛡦𪑬𫁒𩑣𭀨𞐶𜀫𜐶𜀪𠰨𦐽𨐪𝀭𛠳𚐬𝐴𜀫𜐶𜀪𠰨𦀽𨠪𬀫𬀯𜠩𚡓𚁙𚐬𬰽𤰨𦀩🠰🰮𜐺𜀬𬰫𤰨𦀭𝀩𚠪𛠹𯁼𬰬𬠽𪐪𭀯𨠦𜐩`.replace(/u../g,'')))

Jan 16 2020 7:14 PM UTC

}// 139/140

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Real Moon

u/tomxor

... well, as real as it gets in a dweet.
u/tomxor

#moon
u/DataMeta

#space #realistic #compressed

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tomxor

remix of d/17007 by u/KilledByAPixel

function u(t) {

for(c.width|=i=159,x.translate(960,99);i--;x.fillText(r+'____ ____ '+r,S(a/130)*S(a/60)*i-44,9))x.scale(q=1.03,q),r=(a=i+t*60|0)%37?' ╒':'🌵'

Dec 30 2019 11:53 PM UTC

}// 140/140

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Added some fencing

u/tomxor

... gota keep those kangaroos out
u/Xen

how do you kill a killeroo???
u/pavel

it's all you have to do :)
u/katkip

wow #road #text

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KilledByAPixel

function u(t) {

for(c.width|=i=159,x.translate(960,99);i--;x.fillText(r+' ____ ____ '+r,S(a/137)*S(a/69)*i-44,9))x.scale(q=1.03,q),r=(a=i+t*60|0)%37?' ':'🌵'

Dec 29 2019 3:49 PM UTC

}// 140/140

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Long and winding road 🌵V2

u/katkip

awesome! #road
u/joeytwiddle

Nice #perspective
u/katkip

clever use of _____ _____
u/tomxor

Wow! I suddenly feel like playing road rash

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DataMeta

function u(t) {

if(t<55/7)x.fillRect(960-320*C(t-(h=t>22/7?1:0)),540+320*S(h+t),8,8)

Nov 18 2019 11:39 PM UTC

}// 68/140

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ringed #planet

u/DataMeta

with starry backdrop: for(i=2e3;i--;)x.fillRect(i,t*99,r=4.6*Math.random(),r);if(t<121/7) x.clearRect(960+320*C(t-(h=t>88/7?1:0)),540-320*S(h+t),6,6)
u/katkip

awesome!

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RealPeha

function u(t) {

c.width|=0
for(i=0;i<150;i++)
x.arc(900,500,Math.abs(100+C(S(i*5)+t*3)*400),T(i)*7,T(i)*7)
x.stroke()

Nov 18 2019 1:04 PM UTC

}// 101/140

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Just experimented

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f8f82804

remix of d/855 by u/mxfh

function u(t) {

eval(unescape(escape`𭀿𬰽𚁣𛡷𪑤𭁨𧠽𫱮𫑯𭑳𩑭𫱶𩐽𧰽🡢👟𛡸𚐯𝀺𨐽𨠽𜐮𝐷𞱦𫱲𚁱👲👡𞰨𬐭🐱𛱳𚐾𛑡𞱸𛡬𪑮𩑔𫰨𠰨𬐫𨠯𞐹𚐪𤰨𬠭𭀩𚡳𚰲𚡳𛀨𠰨𭀫🐱𛱳𚐪𤰨𬐩𚱃𚁱𚐪𠰨𬠭𭀩𚐪𬰫𬰩𚑲𚰽𨐻𮀮𬱴𬡯𪱥𚀩`.replace(/u../g,'')))

Nov 8 2019 5:13 PM UTC

}// 118/140

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#interactive #mouse #remix

u/kimeiga

wow i would love to learn how this magic works :o incredible!

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f8f82804

remix of d/16419 by u/RealPeha

function u(t) {

t?c.width^=f=_=>"⚀⚁⚂⚃⚄⚅"[6*Math.random()|0]:s=t;onclick=_=>s=t+1;x.font='48em"';with(x)fillText(t>s?v=f()+f():v,550,7e2)

Nov 1 2019 9:42 PM UTC

}// 120/140

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Click to roll a pair of #dice

u/joeytwiddle

#game I got a pair of twos! Is that good?

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