Dweets awesomed by u/Odog8

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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Tesseract

remix of d/20438 by u/Odog8

function u(t) {

n=c.width=133
z=t?z+C(n*z):25
d=(b,a)=>[b-b/(k=(o=a-z)*o+b*b),a+o/k]
for(l=1e4;l--;)x.fillRect(...p=[l%n,l/n],1,(C[l]=t?d(...C[l]):p)[0]/4)

Oct 30 2020 6:18 PM UTC

}// 139/140

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SLE with a better RNG

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u/Odog8

What are these even used for?
u/Tesseract

It's very interesting mathematically - it corresponds to certain kinds of random walk that are hard to analyse otherwise. Some physicists also care about it.
u/Odog8

huh.
u/joeytwiddle

https://en.wikipedia.org/wiki/Schramm%E2%80%…
u/Odog8

Hey, could you explain how you made this further? The wikipedia doesnt do as good of a job as i would have liked :(
u/Tesseract

I can't explain conformal mappings in a comment, but the central part is the function d, which sends z=a+bi to z+delta*dg_t(z)/dt (dg/dt is defined on Wikipedia). For brevity, I've set delta=1/2, so it's approximating d(g_t(z))=g_{t+1/2}(z). The complex number division is golfed. Brightness corresponds to the imaginary part of g_t(z). The javascript variable z is not a+bi, but is brownian motion - zeta(t) according to Wikipedia.
u/Tesseract

I made a non-golfed version in Python a while ago which might be easier to read: https://github.com/penteract/sle/blob/master…

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Odog8

remix of d/20437 by u/Tesseract

function u(t) {

eval(a=unescape(escape`琿瀫㵃⠷⩰⤺瀽《渽挮睩摴栽ㄳ㌊搽⡡Ɫ⤽㹛愫⡯㵡ⴷ⵰⼱〩⨨欽⸱⼨漪漫截戩⤬戭截歝੦潲⡬㴱攴㭬ⴭ㬩砮晩汬剥捴⡪㵬╮Ⱪ㵬⽮ⰱⰨ䍛汝㵴㽤⠮⸮䍛汝⤺孩⼵ⱪ⼵崩嬱崩`.replace(/u(..)/g,"$1%")));throw a

Oct 30 2020 3:17 PM UTC

}// 134/140

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i made a cute little pseudo-random brownian noise, but it was still too big :/

u/Tesseract

I found a few ways to save space - your RNG now fits nicely, thanks :)
u/Odog8

No problem!

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Tesseract

function u(t) {

n=c.width=133
d=(a,b)=>[a+(o=a-7-C(t))*(k=.1/(o*o+b*b)),b-b*k]
for(l=1e4;l--;)x.fillRect(j=l%n,i=l/n,1,(C[l]=t?d(...C[l]):[i/5,j/5])[1])

Oct 30 2020 12:38 PM UTC

}// 136/140

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Schramm–Loewner evolution

u/Tesseract

If anyone knows how to get something that looks like brownian motion as a function of t in around 10 bytes, I'd like to know (it should replace C(t)).
u/rodrigo.siqueira

maybe C(t*i**8) is more random
u/rodrigo.siqueira

I see a very beautiful orange SLE (Schramm-Loewner Evolutions) here: http://www.statslab.cam.ac.uk/~jpmiller/teac… I wish this could be reproduced in javascript.
u/rodrigo.siqueira

I asked jpmiller about how he did that incredible beautiful orange SLE and got his answer, if you want to reproduce it The way that the image was made is using the following steps: "1) Sample an instance of the Gaussian free field (GFF) — see Page 24 of this paper for Mathematica code which produces it https://arxiv.org/pdf/math/0312099.pdf 2) The GFF is a function h defined on the grid {1,...,n}^2. If you consider its exponential exp(i c h), where i = sqrt(-1), c > 0 is a constant, then you get a vector field. 3) Then you can consider flow lines of this vector field by solving the equation eta’(t) = exp(i c h(eta (t)). The image essentially shows flow lines with angles +/- pi/2 starting from every point in the square where c = 1 / (2/Sqrt(128) + Sqrt(128)/2) — this is the value of c so that what you will see will be related to SLE with kappa = 128. Best wishes, Jason"

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tomxor

remix of d/20416 by u/tomxor

function u(t) {

eval(unescape(escape`𠐽𤰨𭀩𞱂👃𚁴𚐻𩡯𬠨𨰮𭱩𩁴𪀽𦀽𜐲𞀻𦀭𛐻𚑻𩡯𬠨𦠽𜐬𤠽𥀨𦀯𞀱𛐮𞀩𞱡🐲𜀫𚁒𚡂𛑁𚐪𦠬𨠽𜐳𜠫𚁒𚡁𚱂𚐪𦠬𚁡𧡢𚐥𝰾𜐻𚑚𚰽𛠱𞱦𫱲𚁙🐭𝀸𞱙𚰫🀴𞀻𮀮𩡩𫁬𤡥𨱴𚁘𛀳𝠭𦐯𦠬𮠥𝰼𝠿𦠯𞀺𮠫𭀪𝠦𨐦𙠭𜐬𜐩𚑺🐨𨐫𨠩𚠸🀼𨐥𜠬𮠽𮠭𦑞𦐫𮡽`.replace(/u../g,'')))

Oct 30 2020 12:00 AM UTC

}// 140/140

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Doom? #raycasting

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u/tomxor

UAC something something Zombies... something something Mars
u/tomxor

Z+=.03 for smoother sampling if your CPU can take it.
u/yonatan

nice one!
u/DataMeta

super cool
u/Xen

love it!
u/sigveseb

waaa with texturing! awesome!
u/tomxor

Thanks :) I just realised I missclassified these. Although it is 2.5D with 3D texturing as Wolfenstien/Doom pioneered, the 2D distance is found using #raymarching rather than casting, which is necessary for size and implicit surfaces.
u/DataMeta

#d2.5
u/DataMeta

heheh tag gaffe
u/bandaloo

oh my god dude
u/vain

Uffff... O.o

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Xen

remix of d/2984 by u/Xen

function u(t) {

for(X=c.width=98;X--;x.fillRect(X,D,1-D/8,59-D*6))for(D=0;'*'<(u+9)[D*C(T=X/99-C(t))|(7-D*S(T))<<3]&&D<6;)D+=.1

Oct 27 2020 6:22 PM UTC

}// 111/140

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Dweetenstein111 #d3

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tomxor

function u(t) {

eval(unescape(escape`𭁼𯀨𬠽𨐽𨠽𝠴𚐻𠐽𤰨𬠩𞱂👃𚁲𚐻𩡯𬠨𨰮𭱩𩁴𪀽𦀽𜐲𞀻𦀭𛐻𨐭👫𚡁𛁢𚰽𪰪𠠬𬠭👃𚁘𛰴𜀫𤰨𭁞𦠩𚐯𦠯𦠬𮀮𩡩𫁬𤡥𨱴𚁘𛀳𝠭𜑥𜰯𦠬𪰪𬠬𜡥𜰯𦠩𚑦𫱲𚁚🐱𛁒👔𚁘𛰸𜐭𛠸𚐻𚁡𚰨𤠪𠠭𠐩𚡚𛰸𧡢𚰨𤠪𠐫𠠩𚡚𛰸𚐥𜐵🠱𞰩𪰽𚁚𚰫𚠪𛠵𛐳𚐯𝁥𜰻`.replace(/u../g,'')))

Oct 26 2020 9:45 PM UTC

}// 140/140

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Wolfendweet 3D #raycasting

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u/KilledByAPixel

🤯
u/DataMeta

🤩 #d3
u/magna

Wowstein!
u/neimad

You won Dwitter
u/tomxor

#raymarching
u/13thptr

#wolfenstein
u/xyper

this is my favourite dweet

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ntsutae

remix of d/20301 by u/rodrigo.siqueira

function u(t) {

関=(横,縦,数=0)=>縦*縦>9?数:関(3/4-3*S(横)*S(縦),Math.abs(縦*縦-横*横),数+1)
for(時=t*60,場=幅=1920;場--;)関(場/幅,時/幅)<33&&x.fillRect(場,時,1,1)

Oct 26 2020 1:18 PM UTC

}// 121/140

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Math.abs Chains

u/ntsutae

#fractal
u/rodrigo.siqueira

This has patterns similar to Nero Marquina Marble
u/joeytwiddle

This reminded me of the Hopalong and Gingerbread man fractals
u/pavel

Wow, this is nice

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ciaccodavide

remix of d/9083 by u/katkip

function u(t) {

F=n=>((T(n/11.17))%6-1<3);x.drawImage(c,0,l=t);for(j=1214;j--;)x.fillStyle=F(j^t*60)?"#000":"#fff",x.fillRect(j*l,0,l,l)

Oct 21 2020 9:56 AM UTC

}// 120/140

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Time-bent Square Universe

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Tangil

function u(t) {

for(c.width|=i=0;i<400;i++)x.fillStyle=`hsl(${30*C(i)} 99%${S(i*t/99)*99}%`,x.fillRect(960+99*C(i*t/99),540+500*C(i),12,12)

Oct 16 2020 3:07 PM UTC

}// 123/140

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My first dweet :D

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rep_movsd

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁣𛡷𪑤𭁨𯀽𢰽𞐹𛁥🐨𡀬𠠬𠰩🐾𩑬𫁩𬁳𩐨𢰪𞐫𡀪𢰪𛐨𠐥𝠼𜰿𜐺𛐱𚐬𝐴𜀬𡐽𥰭𛐪𢰬𡐭𢰬𜀬𠐫𠠬𠐫𠰬𠠩𛁚🐮𜰬𠐽𚁴𙐽𦠩𞱁🀶𚱴𞱁𚰽𦠬𬱴𬡯𪱥𚀩𚑢𩑧𪑮𤁡𭁨𚁗🐴𚐬𩐨𜐬𦠬𜀬𩐨𜀬𜀬𦠬𨱬𫱳𩑐𨑴𪀨𩐨𜐬𜀬𦠩𛁥𚀰𛁚𛀰𚐬𥰽𝐩𚐩`.replace(/u../g,'')))

Oct 15 2020 11:09 AM UTC

}// 140/140

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#tesseract #torus

u/Xen

Nice!
u/magna

canvas.getContext('4d')
u/jellyedwards

Better than my attempt! https://www.dwitter.net/d/19690

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