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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AnnanFay

function u(t) {

c.width|=0
P.push(1+P[2*(1<<Math.log2(f++))-f])
x.stroke(new Path2D('M960,540'+P.map(v=>'hv'[v&1]+'-| '[v&2]).join(s=60/t**.5)+s))}{P=[f=1]

Mar 27 2018 9:41 PM UTC

}// 139/140

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Dragon Curve

u/AnnanFay

This looks great when full screen otherwise the filled version will look much better d/7493

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jylikangas

remix of d/7410 by u/fujimotos

function u(t) {

for(c.width=i=250;i--;x.fillStyle="#"+i*19)x.fillRect(0,0,6,-49,h=(H=i/9-t)<0&&H,x.setTransform(K=C(z=h>-1?h:-1),-S(z),S(z),K,99*(H+2),99))

Mar 25 2018 7:24 AM UTC

}// 139/140

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Fujimotos original now with colors as suggested

u/fujimotos

The use of x.fillStyle here is very very clever. I love it.
u/fujimotos

#dominoes

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robbyg

function u(t) {

for(i=3e3,s=75+C(t)/9,z=30;i--;)x.fillStyle=R(z,s+z,200+C(i/3)*z,.6),x.fillRect(C(t+i/7)*z+z*(i%s)-s,S(t*4+i/9)*z+z*(i/s)-s,s,s)

Mar 26 2018 8:53 PM UTC

}// 128/140

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Afternoon on the lake.

u/robbyg

#water

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xem

remix of d/7471 by u/jylikangas

function u(t) {

A=r=>x.fill(x.arc(960+R*C(t),540+R*S(t),r,0,7))
f%2&&(t+=3)
x.beginPath(A(R=f%2?190:187))
x.fillStyle='#'+(f++%2?"fff":111)
A(50)}{f=0

Mar 26 2018 6:52 AM UTC

}// 134/140

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u/username

ah it is just shy from actual yin yang

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jylikangas

function u(t) {

for(c.width=i=608;i--;i%320<64&&i&2||i>447&i%32<5||x.fillRect(99+S(A)*(60+9*(i>255)),(i>>5)*11+Q*9,9+i%5,9))x.globalAlpha=Q=C(A=i/5.09+S(t))

Mar 23 2018 5:38 AM UTC

}// 140/140

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Spooky medieval tower

Show more comments…
u/Pjaerr

That's cool!
u/p01

I see what you did with the globalAlpha. Same trick as in https://www.dwitter.net/d/5747
u/aleamb

great!
u/sigveseb

A+++
u/joeytwiddle

coool
u/tomxor

This reminds me of the old game 'Nebulus": https://youtu.be/aI2UHTT18bs?t=28
u/KilledByAPixel

#castle
u/katkip

i bet you are the winner
u/vain

oh my god. absolutely unbelievable! as tomxor said - it reminds of the great Nebulus game

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p01

remix of d/7393 by u/yonatan

function u(t) {

for(c.width=i=210;i-=1/8;x.fillRect(99+(i-99)*C(t)+S(i)*r,S(i/67+S(t)/2)*75+C(i)*r,9,9))r=33*S(i/70-6),x.fillStyle=R(a=r*(7-S(i*2)**8),a*.8)

Mar 23 2018 3:33 PM UTC

}// 140/140

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💫 SPINNING BANANA 🍌

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u/p01

Now in centered glory with horizontal and vertical tilt
u/yonatan

Nice!!!
u/magna

Awesome!
u/iverjo

Wow!
u/zanella

Decades from now, we'll all be telling our grandchildren about the Dwitter Banana Frenzy of 2018 .
u/joeytwiddle

#banana

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BirdsTweetCodersDweet

remix of d/7446 by u/prplz

function u(t) {

c.width=w=800
t||(x.fillText(x[f='font']=1+x[f],0,90),d=x.getImageData(0,0,w,w))
for(i=w;i--;)x.putImageData(d,0,T(i/2+t*9)*9+200,i,0,1,w)

Mar 25 2018 2:49 PM UTC

}// 138/140

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A E S T H E T I C C

u/joeytwiddle

#text
u/PiggyClone205

Neat.

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DirtyDan

function u(t) {

for(c.width+=i=0;i++<99;x.globalCompositeOperation='xor')x.beginPath(x.fill()),x.arc(960+i*T(a=3*S(t)),540+3*C(T(i/120+(a<0?t:-t))),i*5,0,7)

Mar 25 2018 6:22 PM UTC

}// 140/140

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If you want to remix, for extra space delete "a=" and replace "(a<0?t:-t)" with t. That stuff just reverses the direction of the ripple depending on what side it's on.

u/magna

Awesome!
u/DirtyDan

check out d/6724
u/DirtyDan

* d/6812

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robbyg

remix of d/7491 by u/xem

function u(t) {

c.width^=0;x.font="5em a";for(i=66;i--;)for(j=36;j--;)x.fillText([..."◜◝◟◞"][~~(Math.random()*4)],i*30,j*30)

Mar 28 2018 9:41 PM UTC

}// 108/140

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Agnes

function u(t) {

with(x)for(w=c.width=1920,i=100,translate(w/2,540);i--;r=w/i,rotate(T(t/30)),strokeRect(m=-r/2,m,r,r));

Mar 25 2018 4:46 PM UTC

}// 103/140

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(Looks way better in full screen.)

u/joeytwiddle

#tunnel #spiral #mercury #timeless #doctor_strange