Dweets 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: #Opposites

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tomxor

remix of d/17271 by u/tomxor

function u(t) {

for(a=b=p=3.14,i=1e4;i--;a+=((t*i/b&1)-a+b*S(a*p))/2,b+=(-a*b+C(a*p))/2)x.fillRect(960+240*C(a*p),540+320*S(i?b*p:p/2),i?1:6,i?.05:a/b/5)

Jan 18 2020 7:53 PM UTC

}// 137/140

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yote

u/tomxor

#waitforit

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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/17224 by u/tomxor

function u(t) {

c.style='filter:invert(1';for(a=b=p=3.1,i=1e4;i--;a+=(r-a+b*S(a*p))/p,b+=(-a*b+C(a*p))/p)i&8&&(r=i*t/b&3,x.fillRect(a*960,b*480+480,.03,1))

Jan 15 2020 6:23 PM UTC

}// 139/140

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HQ Version

u/tomxor

#waitforit cannot reduce noise any further due to limitation of averaging using composite (accumulating over 256 values)

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tomxor

remix of d/17223 by u/tomxor

function u(t) {

c.style='filter:invert(1';for(a=b=0,i=1e4;i--;a+=.3*(r-a+b*S(a*3.1)),b+=.3*(-a*b+C(a*3.1)))i&8&&(r=i*t/b&3,x.fillRect(a*960,b*480+480,.2,1))

Jan 15 2020 12:40 AM UTC

}// 140/140

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u/katkip

Amazing!!!
u/DataMeta

WOW!
u/magna

wowza
u/aleamb

yeah!
u/ivylab

Looks like a giant godlike creature, head and eyes on the left. No idea how you created this awesomeness
u/tomxor

hah, yeah i didn't see that before, like some sort of weird ornate crustacean.

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tomxor

remix of d/17222 by u/tomxor

function u(t) {

c.style='filter:invert(1';for(a=b=0,i=1e4;i--;a+=.3*(r-a+b*S(a*3.14)),b+=.3*(-a*b+C(a*3.14)))i&8&&(r=i*t/b&1,x.fillRect(a*1920,b*960,.2,1))

Jan 15 2020 12:40 AM UTC

}// 139/140

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u/KilledByAPixel

Wow, really amazing stuff!
u/katkip

I love it!!
u/tomxor

thanks :)
u/UEZ

#comets

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tomxor

function u(t) {

c.style='filter:invert(1';for(a=b=0,i=1e4;i--;a+=.3*(r-a+b*S(a*3.14)),b+=.3*(-a*b+C(a*3.14)))i&1&&(r=i*t/b&1,x.fillRect(a*1920,b*960,.2,1))

Jan 15 2020 12:40 AM UTC

}// 139/140

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u/13thptr

great
u/rodrigo.siqueira

One of the most impressive images I`ve ever seen! Please create more like this. #neural #fractal
u/tomxor

Thanks rodrigo :) I will certainly try, although one does not create these things, but mines them from the computational universe :D I look forward to finding more
u/13thptr

becomes really different after a while
u/13thptr

#waitforit

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tomxor

remix of d/17021 by u/tomxor

function u(t) {

for(c.width|=i=140,x.translate(960,360);i--;x.fillText((a=i+t*60|0)%57?' ╒ ___ ___  🌊':'🐪   _🚔 🌴',S(a/130)*S(a/60)*i-54,9))x.scale(q=1.03,q)

Dec 31 2019 5:48 AM UTC

}// 140/140

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Level 2 - Beach Stage

u/13thptr

nice
u/katkip

best on firefox
u/vain

OMG XD Its so cute and amazing!

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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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tomxor

remix of d/16967 by u/katkip

function u(t) {

eval(unescape(escape`挮睩摴栽㈵㘻挮獴祬攽❦楬瑥爺楮癥牴⠧㭹㴳㭰㴨琬温㴾砮晩汬呥硴⡴⹳畢獴爨〬温ⰳ㘬ㄲ⩹⬫⤻瀨怱〠偒䥎吠∤筍㵠䵅剒夠塍䅓Ⅰ索怬琪㴶⤻瀨怲〠䝏呏‱だⱴⴲ㜩㭰⡠剕习ⱴⴴㄩ㭦潲⡴⨽㈻琭ⴭ㤲㸰㬩瀨䴩`.replace(/u(..)/g,"$1%")))

Dec 26 2019 1:06 AM UTC

}// 140/140

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#basic

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