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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wwickedwicked

function u(t) {

a=960
for(Y=0;Y<135;Y++){x.fillStyle=R(0,C(t)*99)
x.fillRect(a,Y*8,a*S(t+Y/8),99)
x.fillStyle=R(C(t+Y)*256)
x.fillRect(a,Y*8,a*S(t-Y/8),99)}

Oct 1 2021 5:29 PM UTC

}// 140/140

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Nam-Shub

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tactical_retard

function u(t) {

if(!t){
s=256
for(i=s*s;i--;){X=0|i/s
Y=i%s
A=X-s/2
B=Y-s/2
d=(A*A+B*B)**.5&X%Y
x.fillStyle=R(b=d*100,b,b)
x.fillRect(X*7.5,Y*4.2,7.5,4.2)}}

Sep 29 2021 3:45 PM UTC

}// 140/140

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#sierpinski

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taupelink

remix of d/23737 by u/taupelink

function u(t) {

for(i=480;--i;x.fillRect(t*f-i*X,480-q/Y,-5*q/t,i))f=i*t,X=f*f%4-2,Y=f**5%4-2,x.fillStyle=R(q=i,q*=1+S((i/6^i/2+t**X)/t),q+=i*Y,i/(q+600)/t)

Sep 30 2021 1:06 AM UTC

}// 140/140

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d/23963

u/cantelope

my wife likes this one so much she asked me to print it so i did. she says she's going to frame it. :)

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mmednik

function u(t) {

c.width=1920
for(i=-100;i<100;i++){
x.fillRect(i*40+T(t*i)*300,0,i*S(t),1100)
x.fillStyle=R(i*2,t*i/2,t*20,1)
}

Oct 1 2021 2:50 AM UTC

}// 112/140

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firegodjr

function u(t) {

x.globalCompositeOperation="difference"
x.fillStyle="#f00"
x.fillRect(0,0,1,1)
x.drawImage(c,1,0)
x.drawImage(c,0,1)

Sep 29 2021 6:57 PM UTC

}// 116/140

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Recurrence

u/aleamb

#recursion #sierpinski

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sigveseb

remix of d/23948 by u/rodrigo.siqueira

function u(t) {

for(i=k=680;--i;x.fillRect(k-i*Y,k-v*i,10*q*X*v,Y*i*v))f=i*t,X=f*f%3-1,Y=X*f%4-2,x.fillStyle=R(q=i*X*X*k,q*=X*X,q*=t*Y*q/i/X,i/q/q),v=.7**t

Sep 29 2021 10:40 AM UTC

}// 139/140

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Red and white

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wwickedwicked

function u(t) {

c.width=1920;A=S(t)*256;for(X=-1;X<1;X+=0.1)for(Y=-1;Y<1;Y+=0.1){Z=X*X-Y*Y;x.fillRect(960+256*X+(Y*A),540+Z*A,8,8)}

Sep 27 2021 4:44 PM UTC

}// 115/140

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u/rodrigo.siqueira

The Hyperbolic Paraboloid (z=x²-y²) is the Pringles Equation. I made a salty, rotating one d/14780

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firegodjr

remix of d/8508 by u/firegodjr

function u(t) {

v=c.width=400
with(x)for(i=40;i--;globalAlpha=i/40,fillRect(v/2-i*2*(1+S(t)),90-i*5,b=shadowBlur=i*10,b))shadowColor=R(g=S(t)*10+20,g,g)

Sep 29 2021 6:07 AM UTC

}// 136/140

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You take a peek inside. The square-hewn tunnel stretches endlessly. Enter the depths? Y/N #cavern

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wwickedwicked

remix of d/23943 by u/wwickedwicked

function u(t) {

c.width=1920;A=T(t)*256;for(X=-1;X<1;X+=0.1)for(Y=-1;Y<1;Y+=0.1){Z=X*X-Y*Y;x.fillRect(960+256*X+(Y*A),540+Z*256+-64*Y,8,8)}

Sep 28 2021 1:09 PM UTC

}// 123/140

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Magic pringle

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mmfun

function u(t) {

t?c.width=-1:a=1
a+=(t%6)-3
x.arc(300+a,119-68*S(2*t%3.16),50,0,7)
x.stroke()
x.clip()
x.font="6cm B"
x.fillText("Dwitter",200*S(t)-200,160)

Sep 26 2021 9:28 PM UTC

}// 140/140

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t?c.width=-1:a=1 a+=(t%6)-3 x.arc(300+a,119-68*S(2*t%3.16),50,0,7) x.stroke() x.clip() x.font="6cm A" x.fillText("Dwitter",200*S(t)-200,160)

u/New_Core

its a copy of old one... https://www.dwitter.net/d/8085