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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myro

remix of d/18534 by u/myro

function u(t) {

c.style.filter=`blur(.5vw)contrast(49`
c.width=1920
for(i=0;i<400;i++){
u=(t+i)%24-2
v=5*S(t+i)+i-u*9
x.fillRect(u*99,v*7,v,v*2)
}

Dec 1 2021 6:44 AM UTC

}// 130/140

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u/andrea270872

very nice effect!

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Pizza

remix of d/24430 by u/noodle

function u(t) {

c.width=w=500+(1+C(t+S(t/3)))*200
for(r=0;r<w;r++){a=(r+t*60)%6.2
x.rotate(.003),x.fillText('i dont know js',r*C(a**a)+w/2,r*1/S(-a)+w/3.5)}

Dec 3 2021 10:13 PM UTC

}// 140/140

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rodrigo.siqueira

remix of d/24391 by u/taupelink

function u(t) {

for(m=1e4;m--;x.fillRect(960*X,540*Y,i,-m/960/Y))X=1+S(m+t/16),Y=1+S(m*m+X),x.fillStyle=R(i=m%99,i*=Y*X/5+Y,i*=Y,a=1-Y/2)

Nov 29 2021 6:05 PM UTC

}// 121/140

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Liquid interactions

u/taupelink

wow!
u/nerkraof

uau, muito bom

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rickyrobot

function u(t) {

w=960;q=540
l=169*S(t/2)
x.fillStyle=R(l,l,255,1)
p=Math.PI/3
for(i=0;i<6;i++){z=w+9*t*(2*S(p*i))
y=q+9*t*(2*C(p*i))
x.fillRect(z,y,9,9)}

Dec 1 2021 8:58 PM UTC

}// 137/140

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Inspired by Veritasium #snowflake the six pointed star

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unknown81311

function u(t) {

test

Dec 3 2021 4:11 AM UTC

}// 4/140

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eval(unescape(escape󩭯󬬨󨼮󭽩󩍴󪍼󟝳󟝧󟝪󟜰󞼫󚽪󟌸󞼩󩭯󬬨󭼽󪜽󝍥󜼬󬜽󪬭󜬬󮌮󩭩󫍬󤽴󮝬󩜽󤬨󭬽󬜿󞜹󛝪󚬱󝜺󭼬󭬬󭬩󛍤󟝪󚬹󞜫󭌪󜬰󚭱󚬪󜭼󜌻󪜭󛜻󮌮󩭩󫍬󤭥󨽴󚍩󚭪󛍱󟽪󟬱󟼲󝜰󚽧󚬲󚽪󚭪󚬱󝬺󜌺󬬪󜜵󛍪󛍱󟽷󞬲󚜩󩼫󟝳󟜨󬬽󚼫󩌪󚬱󛬳󚬱󩜹󙜴󜌩󟌴󟽲󛜲󞭳󛝧󛼲󩜳.replace(/u../g,'')))

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tomxor

remix of d/24387 by u/pavel

function u(t) {

for(i=128;i--;x.fillRect(704+X-s*4.5,Y+s*3.5,s,s))s=t?16:(X=i%4<<8,Y=i/4<<8,b=32),b&1?X+=b%4-2:Y+=b%4-1;b+=468199>>t*60%21&1

Nov 28 2021 6:23 PM UTC

}// 124/140

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Smolr Fastr Pen Pattern

Show more comments…
u/tomxor

... but less satisfying
u/cantelope

first time, ever, i've seen an improvement on any of pavel's designs :)
u/tomxor

True, Pavel's dweets are pretty tight. Usually the most I can hope for is -1 char :P
u/tomxor

d/24387 restored the slow draw, and removed the for loop for only +1 char
u/tomxor

Sorely missing an edit button: I mean d/24396
u/vain

amazing code and algo!

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rodrigo.siqueira

remix of d/24405 by u/rodrigo.siqueira

function u(t) {

for(m=1e4;m--;x.fillRect(960*X,540*Y,i/4,-m/144/Y))X=1-S(m+t/9),Y=1+C(m*m+t/8),x.fillStyle=R(i=m%(200),i*=Y*X/m+Y,i-=Y+C(t+X)*99,a=S(Y)**2)

Nov 29 2021 9:13 PM UTC

}// 139/140

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Dancing fragments

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myro

function u(t) {

x.font = '5vw x' ;
x.translate(10, 4)
for (i=63; i--; x.fillText('.', i, t))x.rotate(C(t/2))

Dec 1 2021 9:22 AM UTC

}// 92/140

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Computer lab ms paint

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anotherkitten

function u(t) {

c.width|=0
x.translate(960,540)
for(i=0;i++<99;x.rotate(Math.PI/4))for(j=4;j--;x.rotate(Math.PI/2))x.fillRect(0,N=1.413**(i-t%4),j&1?-N:N,N)

Nov 29 2021 5:38 PM UTC

}// 140/140

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pentagon spiral

u/magna

#perfectloop

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taupelink

remix of d/24339 by u/taupelink

function u(t) {

for(m=t?0:1e4;X=1+S(m),Y=6*S(m*m--);x.fillRect(960*X,90*(6+Y),q,-i/8))i=m%256,x.fillStyle=R(q=i*(1-C(Y>0?m:Y)),q*=.5+X/4,i-=q*Y,.5/(8-Y))

Nov 28 2021 4:20 PM UTC

}// 137/140

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d/24392