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.

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jprctr

function u(t) {

d=12
for(i=1;i<161;i++){
for(j=1;j<91;j++){
v=255-T(t+S(i+80)*t+C(j+45)*t)*125
x.fillStyle=R(v,v,v,0.1) 
x.fillRect(i*d,j*d,d,d);
}
}

Mar 14 2017 3:32 PM UTC

}// 133/140

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u/lionleaf

Hypnotic in fullscreen

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sfz

function u(t) {

c.width|=h=540
z=S(t)
for(j=3;j>0;j-=.1)for(i=44;i--;)x.fillText(0,h*(2+S(j)**.3*(S(i)*C(t)+C(i)*z)),h*(.3+j/2+(C(i)*C(t)-S(i)*z)/(9+5*z)))

Mar 15 2017 6:10 AM UTC

}// 139/140

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u/donbright

love the three d. i changed 'filltext(0 to filltext(i and went cross-eyed trying to figure out the pattern
u/sfz

Haha probably easier to figure out if you reduce the initial i to 6 and bump it up by 6 til you hit 44

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pangolin

function u(t) {

c.width=1920;f=(y,z)=>{x.lineTo(y*70+980,z*70+540)}
for(i=C(t);++i<25;){for(j=~~t-t;++j<20;){
f(i,0);f(0,-j);f(-i,0);f(0,j);}}
x.stroke();

Mar 14 2017 2:02 AM UTC

}// 138/140

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mxfh

remix of d/2113 by u/mxfh

function u(t) {

x.setTransform(f=60,0,0,f,9*f,9*f);i=~~t%8;r=i<4;x.rotate(Math.PI/2*i);x.fillStyle=r?'#D22630':'#003087';x.fillRect(l=r?-1:2,l,r?2:f,f)

Mar 14 2017 3:13 AM UTC

}// 135/140

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http://www.norden.org/en/fakta-om-norden-1/t…

u/iverjo

#flag

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mxfh

remix of d/2118 by u/mxfh

function u(t) {

x.setTransform(f=90,0,0,f,7*f,6*f);x.fillStyle='#EF3340';x.ellipse(0,0,4,4,0,0,2*Math.PI);x.rect(-7,0,f,f);x.fill("evenodd")

Mar 14 2017 3:23 AM UTC

}// 124/140

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http://www.norden.org/en/fakta-om-norden-1/t…

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nick

function u(t) {

e=200
for(i=0;i<88;i++)for(j=0;j<50;j++)x.fillRect(e*T(i*t)+800,e*T(j*t)+550,3,3)
x.fillStyle=R(e*T(t*i),e*T(t),e*C(t*i))

Mar 14 2017 5:53 AM UTC

}// 121/140

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Disclaimer: If you stare too long, it could result in mild hypnosis and spontaneous clucking.

u/sigveseb

must. resist. temptation. to. cluck.

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sfz

remix of d/2131 by u/recursive

function u(t) {

for(i=63;i--;)z=t/7%1,x.fillRect(X=z*2e3-99,Y=S(t)*540+540,80/z,80*z),t+=99/13,x.fillStyle=R((i&48)<<3,(i&12)<<5,(i&3)<<7,S(t/X)*C(-t/Y)/9)

Mar 14 2017 9:09 PM UTC

}// 140/140

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No room to spare.

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recursive

function u(t) {

x.fillRect(C(t/5)*960+960,S(t)*270+270,9,9)
x.clearRect(0,h=540,2e3,h)
for(i=544;i-=8;)x.drawImage(c,0,h-i,2e3,8,0,h+i*(S(i+t)/9+1),2e3,8)

Mar 12 2017 11:00 PM UTC

}// 138/140

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Reflections

u/Renaud___

Nice idea
u/codeslaw

love this
u/FireFly

Lovely reflections :D

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msamuelberg

function u(t) {

  for(i=0;i<1;i++)
  x.fillRect(800+i*100+S(t*5)*20*t,540+i*100+C(t*5)*20*t,4*(S(t)+2),4*(S(t)+2))
  x.fillStyle=R(S(t/4)*255,S(t/8)*255,1)

Mar 15 2017 5:30 PM UTC

}// 139/140

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u/donbright

i like this design a lot
u/sfz

Very pretty

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recursive

function u(t) {

t||(g=h=[])
for(n=i=960;--i+n;x.fillRect(i/d+n,(4-g)*99/d,9,99))h[i]=g=(g+h[i-1]+S(n*g)/9)/2||1,x.fillStyle=R(q=3*(t+9)*g,q,q*q>>7),d=1-t/30

Mar 13 2017 4:23 AM UTC

}// 140/140

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Rough surface

u/IV

It's like watching Bob Ross: 'happy little trees; anywhere you feel like...'