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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pat

remix of d/461 by u/pat

function u(t) {

p=Math.random()*3;a=t>1?p<1?(a+400)/2:p<2?(a+1400)/2:(a+900)/2:900;b=t>1?p>=2?(b+140)/2:(b+1e3)/2:570;x.fillRect(a,b,5,5);

Aug 2 2018 5:21 PM UTC

}// 122/140

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katkip

function u(t) {

_=["\x77\x69\x64\x74\x68","\x66\x69\x6C\x6C\x52\x65\x63\x74"];c[_[0]]=1920;for(i=0;i<9;i++){x[_[1]](400+i*100+S(t)*300,400,50,200)}

Aug 1 2018 4:53 PM UTC

}// 131/140

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#default #compressed

u/katkip

#obfuscated

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katkip

remix of d/5324 by u/Zolden

function u(t) {

c.width|=0;for(k=0;k++<1999;){j=k%56;q=j*j;
i=k/60;p=255-q*j/30;x.fillStyle=R(p,p+69,p,1);x.fillRect((q+75)*i-q*(t+8)*3,q*2,q/2,j*40)}

Aug 1 2018 4:45 PM UTC

}// 134/140

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**The army**

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wbbradley

remix of d/9021 by u/wbbradley

function u(t) {

c.width=1920
for(i=0;i<15;i++){
j=i/19.
x.font=178+i*39+'px s'
r=150
x.fillText('⚜',780+r*C(t)*j-i*20,590+r*S(t)*j+i*20)}

Aug 1 2018 2:29 AM UTC

}// 121/140

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d0n.key

function u(t) {

c.width*=1
for(i=0;i<10;i++)x.beginPath(),x.fillStyle=R(b=55+((8*t+10-i)%10)*20,b,b),x.arc(960+C(a=i*0.63)*100,540+S(a)*100,20,0,9),x.fill()

Jul 31 2018 2:40 PM UTC

}// 140/140

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YouTube suicide motivator (as it's displayed on YT I guess)

u/joeytwiddle

#loading

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bradleybdua

function u(t) {

z=(s,p)=>s+C(t*p/10)*s;c=255;x.fillStyle=R(z(230,3),z(230,5),z(230,7));x.fillRect(z(960,11),z(540,13),z(100,17),z(100,19));

Jul 31 2018 11:14 PM UTC

}// 123/140

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katkip

function u(t) {

for(c.width=i=1e3;i>1;i-=8)x.beginPath(),s=1+C(1+S(i)-t),x.ellipse(200+99*s*s*1.3,(s*200)+t,h=99*(1-C((S(t/i)+i))),h,s*10,+s+i,9),x.stroke()

Jul 30 2018 10:42 PM UTC

}// 140/140

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u/joeytwiddle

Amoeba

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katkip

function u(t) {

if(!t)x.translate(960,540)
r=y=>Math.random()*y
if(!t)x.fillStyle=R(123,0,0);
x.fill()
x.lineTo(r(25%t*20),0)
x.rotate(S(t/3))
x.stroke()

Aug 1 2018 12:38 PM UTC

}// 137/140

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Evolving crystal

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Agnes

function u(t) {

for(c.width|=l=20;l--;)for(s=189;s--;x.stroke())x.beginPath(P=S(l+5*t)),x.lineWidth=15-5*P+3*S(s+P*15+t),x.arc(960,540,25*l,s/30,(s+1)/30);

Jul 31 2018 10:48 AM UTC

}// 139/140

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You can probably re-create BeesAndBombs's latest (https://twitter.com/beesandbombs/status/1024…) with this but it runs so poorly I didn't feel like doing the last part.

u/Agnes

#beesandbombs #kinda
u/Agnes

Runs perfectly fine at 60 fps in the iPhone browser, but a choppy 10-15 FPS in Chrome on my superpowered work laptop. What a time to be alive.

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katkip

remix of d/6210 by u/Qwitter

function u(t) {

for(s=490,i=s;i;)for(j=6;--j;)q=t%256,x.fillStyle=R(s*T(q+i),i/T(j-i),s/C(i),1/j),x.fillRect(970+s/S(i--)*C(t/j+j),s+s*T(i+t),35,35);FPS++;

Aug 1 2018 9:08 AM UTC

}// 139/140

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