Dwitter - javascript demos in 140 characters

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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Foldster

function u(t) {

t*=500
c.width+=0
for(i=1;i<80;i++)
for(j=0;j<100;j++)
(((j+(s=i+t))^(s-j))**2)%51<2?x.fillRect(7*i+1.5*j*(130-i)/10,10*(110-i),10,10):1

May 18 2020 3:55 PM UTC

}// 136/140

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Bitfield Road

u/tomxor

O_o i recognise this pattern... shameless plug, here's the interactive gamified version: d/15502
u/ntsutae

This feels good.
u/sigveseb

Almost looks like guitar hero

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magna

function u(t) {

eval(unescape(escape`睩瑨⡸⥦楬汓瑹汥㵒⠰⤬晩汬剥捴⠰ⰰⰲ攳ⰲ攳⤬晩汬却祬攽✣晦昧ⱦ潮琽✱㝥洠浯湯獰慣攧ⱴ數瑁汩杮㴧捥湴敲✬晩汬呥硴⡮敷⁄慴攨⤮瑯䱯捡汥呩浥却物湧⠩ⰹ㘰ⰵ㠰⤻`.replace(/u(..)/g,"$1%")))

May 20 2020 3:27 AM UTC

}// 124/140

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Big clock

u/magna

Needed a clock as a reference while shooting a video. Who uses CodePen, jsFiddle et al when you have Dwitter amirite?
u/magna

#clock
u/sigveseb

Haha :D
u/magna

#app

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bandaloo

remix of d/18913 by u/bandaloo

function u(t) {

i=~~(t*60);x.fillStyle=R(t*9,C(t)*99);x.font="24px'";x.fillText(S(t)*t/9&1?'╱':'╲',(i%80)*24,~~(i/80)*24)

May 21 2020 10:12 PM UTC

}// 105/140

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bandaloo

function u(t) {

i=~~(t*60);x.font="48px'";x.fillText(Math.random()<0.5?'╱':'╲',(i%40)*48,~~(i/40)*48)

May 21 2020 10:01 PM UTC

}// 85/140

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10 PRINT CHR$(205.5+RND(1)); : GOTO 10

u/bandaloo

considered golfing the Math.random()<0.5 part but it seemed not in the spirit of the source material

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smtsjhr

remix of d/18861 by u/smtsjhr

function u(t) {

c.width|=0,s=355,x.font='450px serif'
for(i=1;i<4;i++)for(j=1;j<4;j++){
x.fillText('▩',i*s-s,j*s)
x.fillText('▩',s*(1+i+2*C(t/5)),j*s)}

May 21 2020 7:10 AM UTC

}// 136/140

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Figure 1: A simulation of a sliding chain-link fence

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tomxor

remix of d/18851 by u/Foldster

function u(t) {

for(c.width=128,i=1e4;X=i&127,Y=i>>7,i--;)
x.fillRect(X+Y*(X/64-1),Y-Y**2/48+48,2,R),
Y-=t*90,R=(X+Y^Y-X)%(48+t)<6

May 19 2020 1:17 PM UTC

}// 114/140

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Different code but same basic (X+Y^Y-X) and theme

u/sigveseb

neat

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rodrigo.siqueira

function u(t) {

if(!t){
document.write("<font size=1>")
for(n=84;n-=r=i=1/32;document.write(n%3?k:" "))for(k=21;--k/r;i=t)t=2*r*i+1-n/42,r=r*r-i*i+1-n%3
}

May 19 2020 5:49 PM UTC

}// 138/140

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Mandelbrot Tracer ASCII Art #ascii #mandelbrot using p01 and xen ideas

Show more comments…
u/rodrigo.siqueira

Code from "Mandelbrot Tracer - Possibly the smallest Mandelbrot tracer ever in JavaScript": http://www.p01.org/128b_mandelbrot/ (Mathieu 'p01' Henri page), u/p01 citing u/xen
u/Xen

😍 My very first golf
u/andrea270872

Cool. I love text rendering... I actually tried something like that... but less golfed and more primitive... if you'd like to comment on it: http://andval.net/julia_v2_4.html
u/rodrigo.siqueira

I like your page and code u/andrea270872, it's nice to see the parameter changes and ASCII ART rendering. Please see mine ASCII ART Mandelbrot and Julia Sets, color, including "POETRY" option, clickable, zoom, and other control options: http://www.fractarte.com.br/cgi-bin/ascii-fr… (it was made 19 years ago, I only updated the link to my Dwitter profile!) It's made in PERL, if you want I can send the source code if you want to convert it to JavaScript.
u/andrea270872

Wow. I have to play with it! Terrific use of text and colors. The dithering with the Xs looks like stitching... very nice.
u/rodrigo.siqueira

I updated the code to remove the "stitching" effect. It's here (color ascii art mandelbrot and Julia Set): https://bit.do/ascii-fractal

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rodrigo.siqueira

remix of d/18850 by u/rodrigo.siqueira

function u(t) {

for(i=2e3,f=(X,Y,n=10)=>Y<9?f(X*X-Y*Y-.75,2*X*Y+.3,n-.12):x.fillStyle=`hsl(${i/6},75%,${n*n}%`;i--;x.fillRect(i,t*60,1,999))f(i/480-2,1-t/9)

May 18 2020 3:58 PM UTC

}// 140/140

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Light colors #Fractal #Julia for c = −0.75 + 0.3i

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KilledByAPixel

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁩👴🠲🰴𞐺𜐹𞐻𪐭𛐻𪰿𩡩𫁬𚀩𞡳𭁲𫱫𩐨𚐩𨡥𩱩𫡐𨑴𪀨𚐬𪰽𭀼🀱🐽𜠿𜀺𪐪𞐭𝐰𜀬𩡩𫁬𤱴𮑬𩐽𬱴𬡯𪱥𤱴𮑬𩐽𤠨𭠽𪐪𚠹𙐨𪰿𜐴𞐺𜠹𞐩𛁶𛁶𚐬𩑬𫁩𬁳𩐨𞐶𜀬𝐴𜀫𪰬𬠽𭀿𪰿𚀲𩐵𛑫𚡫𚐪𚠮𝐺𝰴𜀫𤰨𪐪𪐩𚠱𞐹𞠴𩐴𛁲𛰳𛀰𛀰𛀷𚐻`.replace(/u../g,'')))

May 18 2020 9:43 PM UTC

}// 140/140

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Saturn 🪐 #planet #space

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remix of d/17743 by u/rodrigo.siqueira

function u(t) {

c.width|=0
for(k=0;k<1;k+=.07)
for(X=-5;X<5;X+=.01)
ψ=(1-X**2)*3**-(X**2/2)*S(k*8),x.fillRect((X+5)*140+k*650*S(t),k*800+400-ψ*300*S(t),2,4)

May 19 2020 1:06 AM UTC

}// 140/140

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u/sigveseb

reminds me of a music video I saw once