Dweets awesomed by u/rep_movsd

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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tomxor

remix of d/17224 by u/tomxor

function u(t) {

c.style='filter:invert(1';for(a=b=p=3.14,i=1e4;i--;a+=(r-a+b*S(a*p))/p,b+=(-a*b+C(a*p))/p)i&4&&x.fillRect(900+b*480,60+a*960,1,.2,r=i*t/b&3)

Jan 19 2020 1:39 PM UTC

}// 140/140

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u/13thptr

mind=blown
u/tomxor

:D did you see the tendrils too, stuff just lives in math i swear
u/ivylab

I just learned this cool invert trick from your dweets, awesome. Did you notice that you can leave out the 1 at the end? :)
u/tomxor

Oh nice, thanks for the tip u/ivylab :)

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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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magna

remix of d/17189 by u/yonatan

function u(t) {

for(i=c.width=300;i--;x.strokeRect(-300,i-50,600,9))x.setLineDash([i*(S(t)+1.5)])
for(i=9;i--;)x.fillRect(63+i*16+S(t)*47,63,8,31)

Jan 16 2020 1:10 AM UTC

}// 131/140

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Compulsory #default remix

u/tomxor

:P If default were a chess piece, it could only move laterally in alternate directions each move.

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Leodude123

function u(t) {

eval(unescape(escape`猽挮獴祬攻献扡捫杲潵湤䉬敮摍潤攽❳捲敥渧㭦潲⡢㵛椽㤹崻椭ⴻ扛楝㵠牡摩慬ⵧ牡摩敮琨⑻匨椪椩⨲⬲⸵絥洠慴․笵〫ㄵ⩓⡱⥽┤筙紥Ⱔ筒⠲㔵ⱙⱙ⼷ⱙ⼴㤭⸳⥽Ⱓ〰〩怩夽㐸⬲㘪䌨焽椫琩㭳⹢慣歧牯畮搽戻`.replace(/u(..)/g,"$1%")))

Jan 15 2020 6:33 PM UTC

}// 140/140

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u/KilledByAPixel

nice, what did you change?
u/Leodude123

Nothing!
u/lionleaf

Looks like the previous one is missing a )

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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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yonatan

function u(t) {

for(i=c.width=300;i--;x.strokeRect(-300,i-50,600,9))x.setLineDash([i*(S(t)+1.5)])

Jan 13 2020 2:54 AM UTC

}// 81/140

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sigveseb

function u(t) {

eval(unescape(escape`圽琥㌼⸲㼶㐫匨䌨琪㤩⤪㤺圻景爨椽㈵㘻椭ⴻ砮晩汬剥捴⡩⨸ⰰⰸⰸ⤩砮晩汬却祬攽椼⠱㈸ⵗⵔ⡍㵴⼲┱⸵⤩籼椾吨䴩⬶㐫圿∣㑡攢㩠桳氨〬〥Ⱔ答⡴⨳⤫⡍㸮〵⤪㈵⨨ㄫ⡩㸶㐫圯㌩⥽┩总砮摲慷䥭慧攨挬〬㐩`.replace(/u(..)/g,"$1%")))

Jan 13 2020 12:46 AM UTC

}// 140/140

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Infinite #castle tower

u/sigveseb

#compressed
u/KilledByAPixel

👍
u/sigveseb

I really wanted to add some windows as well, but couldn't fit it in
u/denzen

I love it!
u/astronaut

Impressive. Like almost all your posts.

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