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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taupelink

remix of d/21451 by u/taupelink

function u(t) {

for(i=k=240;i-=10;x.fillRect(k*X,k*Y,i/t,i/t))f=i*t,Y=f*f%5,X=Y*f%8,h=C(m=C(q=C(X|0)%S(Y)*i)%S(p=C(q&Y)*i)*i)*i,x.fillStyle=R(h*q,h*m,h*p)

Jan 26 2021 7:46 PM UTC

}// 138/140

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d/21461

u/russd

♥

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Qwitter

function u(t) {

x.fillStyle="#9351";x.fillRect(0,0,m=2e3,m);T=5.495;f=1+(t%(2*T)>T)^0;D=640;A=D/(1+(t%T)**3);x.clearRect(f*D+A*C(4*t),540+A*S(4*t),25,25);

Jan 26 2021 3:06 PM UTC

}// 138/140

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Exchanging Centers

u/smtsjhr

FILL then CLEAR instead of CLEAR then FILL! thats so neat! i never thought that and find it kinda *ZEN* in philosophy idk
u/Qwitter

Agreed @smtsjhr, I picked this technique up from post d/6548 by u/41407 and employ it frequently.

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Pascal

remix of d/21403 by u/danny@hille.dk

function u(t) {

c.width=w=70;for(i=2800;i--;)x.fillRect(X=i%w,Y=(i-X)/w,0<T(T(S(X/7+5*C(t))+S(Y/7-5*t))),1)

Jan 24 2021 2:39 PM UTC

}// 91/140

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noisy donuts

u/danny@hille.dk

Mmmmm donuts
u/Xen

nicely done

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erin

remix of d/21439 by u/erin

function u(t) {

c.width=w=70;for(i=2800;i--;)x.fillRect(X=i%w,Y=i/w,X/15+1*C(Y/6.5)+C(X/7-5*t),1),x.fillStyle=`hsla(${U=i/9+S(t+i)*9},5%,50%,${C(U+i)+1})`

Jan 25 2021 2:15 AM UTC

}// 138/140

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Pulsar v2

u/andrea270872

very cool. It makes me thing of some retro tv intro, like from Dr Who! Great

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rodrigo.siqueira

remix of d/21425 by u/Pascal

function u(t) {

for(j=9;j--&&t<2;)for(i=600;i--;x.fillRect(a=t*60+j*200+99,i+240,2,f(a/2400-.6,i/900+.2)))f=(X,Y,n=80)=>Y<n?f(X*X-Y*Y,2*X*Y+.7,--n):n/80

Jan 24 2021 11:20 PM UTC

}// 136/140

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#fractal flowers #default

u/Qwitter

Yes! - also, great way to keep general audiences interested in watching the longer calculations unfold, thanks.

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Xen

remix of d/21448 by u/Xen

function u(t) {

onmousemove=e=>x.lineTo(e.x/.3,e.y/.3,x.stroke())

Jan 25 2021 7:10 PM UTC

}// 49/140

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49 another slight golf

u/Xen

*3 save 2 more bytes but not too exact sorry

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taupelink

remix of d/21416 by u/taupelink

function u(t) {

for(i=k=120;i--;x.fillRect(k*X,k*Y,i/t,i/t))f=i*t,X=f*f%16,Y=X*f%9,h=i*C(m=C(q=C(X|0)%S(Y)*9)%C(p=C(Y|0)*X/9)*9),x.fillStyle=R(h*p,h*q,h*m)

Jan 26 2021 1:03 AM UTC

}// 139/140

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d/21451

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Pascal

function u(t) {

M=(a,r=0,i=0,n=40)=>Math.abs(r+i)<n&&1<n?M(a,r*r-i*i+a,2*r*i-t/600+.0149,--n):1-n/30;for(i=1920;i--;)x.fillRect(i,t*120,M(i/64e3-1.6)**.5,2)

Jan 23 2021 7:42 PM UTC

}// 140/140

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#mandelbrot forest

u/magna

Lovely!
u/smtsjhr

nice one!
u/Xen

nice
u/Qwitter

That's Awesome! Escape Time in the MandelBrot Forest for rest.

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Qwitter

remix of d/21364 by u/Qwitter

function u(t) {

eval(unescape(escape`𤤽𜔳𜄫𞔪𤴨𜴪𭄩𞵸𛥦𪕬𫅓𭅹𫅥🔢𘴲𜤴𜔢𞵸𛥦𪕬𫅒𩕣𭄨𜄬𜄬𫔽𜥥𜴬𫔩𞴊𩥯𬤨𪴽𜥥𜤻𪴭𛔻𚕌🔱𚵓𚅴𚤷𚔯𝔬𪄽𪴫𭄬𤔽𤤪𚄲𚵃𚅨𚔪𣄩𛅰🕒𚥓𚅨𚔪𣄬𮄮𨵬𩕡𬥒𩕣𭄨𫔯𜤫𤴨𭄩𚥑𛄵𝄰𛕃𚄱𚔪𬄫𤴨𜔩𚥃𚅴𚔪𤔬𥴽𤤯𚄱𛤳𚥒𛕰𚔪𚤮𜴬𥴩𞴊`.replace(/u../g,'')))

Jan 25 2021 5:26 PM UTC

}// 137/140

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Pressurized Peace

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rodrigo.siqueira

remix of d/21421 by u/rodrigo.siqueira

function u(t) {

M=(a,r=0,i=0,n=40)=>r*T(i*t)<n?M(a,r*r-i*i+a,2*r*i-t/5+1.2,n-=3):-n/9;for(i=2e3;i--;)x.fillRect(i,t*90,M(i/520-2.5)+1,2)

Jan 24 2021 5:12 PM UTC

}// 120/140

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Dramatic spider web effect inside the #mandelbrot set #noise

u/Qwitter

Its easy to like noises that sound like that
u/magna

Stylish!