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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Current theme challenge: #Food

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alien

remix of d/2848 by u/alien

function u(t) {

w=c.width=200;f=frame
x.beginPath()
 for(i=0;i<167;i++)
 x.lineTo(45*S(1.84*i+i)+75,45*C(4.01*i+t*1.3)+60)
x.stroke()

Jul 13 2017 6:34 PM UTC

}// 118/140

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fuzzybunie

function u(t) {

Y=t*60%1080;for(X=1920;X--;)x.fillStyle=R(v=(v=((i=X-960)*i+(j=Y-540)*j-2e5)/9)<0?0:v>(m=Math.random()*2e2)?m:v,v,v),x.fillRect(X,Y,1,1)

Jul 14 2017 2:08 PM UTC

}// 136/140

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cantelope

function u(t) {

A=960,B=540,x.fillRect(0,0,2e3,2e3)
for(i=99;i--;)x.clearRect(A+1/(Z=2.5+C(p=i+t)*S(q=i/31))*(X=S(p)*S(q))*A,B+C(q)/Z*A,s=69/Z/Z,s)

Jul 10 2017 4:43 AM UTC

}// 132/140

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u/f8f82804

#sphere #perspective

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alien

remix of d/2851 by u/alien

function u(t) {

w=c.width=200;f=frame
c.style.background='#B28'
x.beginPath()
 for(i=0;i<w;i++){
 x.lineTo(45*S(23.0327*i+t)+99,45*C(t+i)+60)
 }x.stroke()

Jul 13 2017 6:39 PM UTC

}// 139/140

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alien

remix of d/2848 by u/alien

function u(t) {

w=c.width=200;f=frame
c.style.background='#B28'
x.beginPath()
 for(i=0;i<w;i++)
  x.lineTo(55*S(29.5*i**.02+t)+99,50*C(t+i)+60)
 x.stroke()

Jul 13 2017 6:12 PM UTC

}// 140/140

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alien

remix of d/2847 by u/alien

function u(t) {

w=c.width=200;f=frame
c.style.background='#B28'
x.beginPath()
 for(i=0;i<w;i++){
 x.lineTo(45*S(20.030*i+t)+99,45*C(t+i)+60)
 }x.stroke()

Jul 13 2017 5:58 PM UTC

}// 137/140

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donbright

remix of d/2839 by u/alien

function u(t) {

w=c.width=115
for(j=w;j--;)
for(i=w;i--;)q=2*i*j*S(t)+C(t)*(i**2+j**2),x.fillStyle=R(s=(q*q*frame>>t)%255,s,s*3),x.fillRect(i,j,1,1)

Jul 10 2017 3:22 AM UTC

}// 132/140

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remixing @alien color + code with some of my old binary quadratic forms stuff (aka circles and squares pseudo fractals)

u/cantelope

cool donbright
u/donbright

thx cantelope

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New_Core

function u(t) {

a=t*60
if(a<2e3){
for(b=1080;b--;){
A=a/400-3,B=b/400-1.4
d=A,e=B
for(i=20;i--;)D=d*d-e*e+A,E=2*d*e+B,d=D,e=E,d*e>5?x.fillRect(a,b,1,1):0
}}

Jul 9 2017 7:52 PM UTC

}// 140/140

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u/donbright

i ran this on firefox and i swear some of the little gray pixels are twinkling like little stars. it looks really cool in full screen too.
u/cantelope

amazing
u/New_Core

#fractal

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alien

remix of d/2841 by u/alien

function u(t) {

w=c.width=180
f=frame
for(j=0;j<w;j++)
for(i=0;i<w;i++){
q=(i*i+j*j)**(3)+f&200
s=i*C(q)
s%=255
x.fillStyle=R(s,s*2,s)
x.fillRect(i,j,1,1)}

Jul 7 2017 7:36 PM UTC

}// 140/140

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Wow much patterns such wow...

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New_Core

remix of d/2828 by u/New_Core

function u(t) {

for(i=602;i--;x.fillStyle=`hsla(${i+99*S(f+S(i/f))},99%,50%,.05`)i<217?x.fillRect(0,5*i,2e3,5,f=t):x.fillRect(5*i-1085,0,5,1080,f=t*.5)

Jul 6 2017 8:18 PM UTC

}// 135/140

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u/joeytwiddle

Very pretty!
u/alien

nice !
u/New_Core

#colorshock