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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robbyg

function u(t) {

for(Y=i=45;Y--;)for(X=80;X--;x.fillRect(X*24,Y*24,24,24))x.fillStyle=X&Y&t*3?R(++i%200):'#fff'

Oct 21 2020 9:29 PM UTC

}// 94/140

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Just playing.

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ciaccodavide

remix of d/20323 by u/ciaccodavide

function u(t) {

g=c.width=1920
n=19
for(i=0;i<g/3.17;i+=n){
z=S(t)*100*S(i)
a=i
b=1080-a*2
x.fillStyle=i%2.0>.8?'#ffa':'#aaf'
x.fillRect(a+z,a+z,b,b)
}

Oct 20 2020 9:25 PM UTC

}// 135/140

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Pyramidic Corridor

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WasifBoomz

remix of d/20329 by u/bandaloo

function u(t) {

i=t*60;x.font=t*100+"px'";x.fillStyle=`hsl(${t*99},40%,80%`;x.fillText(T(i)&1?'╱':'╲',i%20*96,i*5);x.drawImage(c,t,C(t))

Oct 21 2020 7:48 PM UTC

}// 120/140

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#waitforit

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WasifBoomz

remix of d/20306 by u/dethe

function u(t) {

c.width=1920 // clear the canvas
p=Math.PI*3
h=(n,f)=>n+f(i*p/180)*n/2+f(t+i)*n/3
for(i=0;i<t*9;i++)
x.fillRect(h(960,S,C),h(540,C,S),25,25)

Oct 21 2020 7:45 PM UTC

}// 140/140

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#waitforit

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Xen

remix of d/20310 by u/andrea270872

function u(t) {

x.fillRect(a=t%1*2e3,b=(20*~~t)%1e3,35,99)
x.fillStyle=`hsl(${a^b},70%,50%,.3)`

Oct 20 2020 4:06 PM UTC

}// 79/140

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test and golf

u/Xen

#noloop

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andrea270872

function u(t) {

a=t%1*2e3
b=(20*~~t)%1e3
x.fillStyle=R(C(a)*S(b)*80+80,160,0)
x.fillRect(a,b,35,20)

Oct 20 2020 2:49 PM UTC

}// 83/140

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just testing some ideas on the theme "what can I do without loops?"

u/solendil

#noloop

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DataMeta

remix of d/20288 by u/KilledByAPixel

function u(t) {

c.width|=i=490
for(x.translate(1013,577);i--;x.rotate(.9999**t))x.rect(-1e3,i%1*64,2e3,80-C(i%1+t)*64)
x.fill`evenodd`

Oct 19 2020 6:56 AM UTC

}// 118/140

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#hypnotic #tunnel

u/DaSpider

It has a retro demo vibe

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danny@hille.dk

function u(t) {

for(m=Math,c.width=X=99;X--;)for(Y=66;Y--;)a=m.atan2(X-50,Y-30),x.fillStyle=R(X,S((a+S(m.hypot(X-50,Y-30)/-13+t))*5)*99),x.fillRect(X,Y,1,1)

Oct 20 2020 11:36 PM UTC

}// 140/140

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wonky spiral

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dethe

function u(t) {

c.width=1920 // clear the canvas
p=Math.PI
h=(n,f)=>n+f(i*p/180)*n/2+f(t+i)*n/3
for(i=0;i<360;i++)
x.fillRect(h(960,S,C),h(540,C,S),25,25)

Oct 20 2020 5:06 AM UTC

}// 138/140

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First dweet in ages, but I like it

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ciaccodavide

function u(t) {

j=100
while(j-->0){k=100
while(k-->0){x.fillStyle=R((1-j)*S(t)+k*C(t+3),k*S(t),j*C(t)+k*S(t))
x.fillRect(j*19.2,k*10.8,19.2,10.8)}}

Oct 20 2020 10:23 PM UTC

}// 131/140

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From Dusk Till Down