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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danny@hille.dk

function u(t) {

for(c.width|=i=0;i<99;i+=.09)
{ 
  X=S(i*t)*i*9+540
  Y=C(i*t)*i*9+960
  x.lineTo(Y,X)
}
x.stroke()

Sep 6 2020 1:58 PM UTC

}// 99/140

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Spiral

u/danny@hille.dk

I just found out that this is almost identical to https://www.dwitter.net/d/739 :-(

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dull_pixel

function u(t) {

t?c.width|=0:C=W=0;C;onkeydown=e=>C+=1;x.font='99px"';x.fillText(+~~C+'',9,90)
onclick=e=>C=0

Sep 7 2020 2:43 AM UTC

}// 93/140

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- press any key to increase it, and click to reset it -

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katkip

function u(t) {

c.width*=1;c.style.filter='invert()'
for(i=1999;i--;)x.beginPath(),x.fill(x.arc(960+S(z=i*55+t/9)*i**1.1,3e3+C(z)*i**1.1,99-i/29,0,t))

Sep 5 2020 12:21 PM UTC

}// 134/140

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u/DataMeta

cool, like a planetarium of sorts
u/Xen

nice!

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smtsjhr

remix of d/19851 by u/smtsjhr

function u(t) {

c.width|=0
for(i=300;x.beginPath(),i--;x.fill())x.arc(960+120*C(a=.15*i+t/5)*(k=1.01**i),600+60*S(a)*k,10*k*(1+S(i/10-3*t)),0,7)

Sep 6 2020 5:39 AM UTC

}// 129/140

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POV treading half-toned water at the Eye of the #storm

u/Qwitter

wow!

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taupelink

remix of d/19843 by u/taupelink

function u(t) {

r=Math.random;for(i=z=1200;i--;x.fillRect(960+X*C(Y),540-X*S(Y),w=60/t,w))X=r(Y=r()*6.3)*z,x.fillStyle='#'+'3CFFC3'.substr(9*S(Y+X/9%t)&3,3)

Sep 4 2020 2:29 AM UTC

}// 140/140

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d/19845

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Xen

function u(t) {

x.fillStyle=`hsl(${z=t*2e3} 50%50%)`
x.fillRect(z%2e3,z/1e3*4,39,5)

Sep 6 2020 5:20 PM UTC

}// 67/140

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smtsjhr

function u(t) {

for(i=99;x.beginPath(),i--;x.fillStyle=R(w=200+(20*t-i)%55,w,w,.04),x.fill())x.arc(960+150*C(a=2.4*i)*(k=1.01**i),540+150*S(a)*k,40*k,0,7)

Sep 5 2020 7:18 AM UTC

}// 140/140

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In the Spirit World the Ghost Flower exists in a state of perpetual bloom.

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rep_movsd

function u(t) {

eval(unescape(escape`𪑦𚀡𭀩𭱩𭁨𚁸𚑻𮠽𬐽🡦𪑬𫁓𭁹𫁥👱𛁸𛡦👦𪑬𫁒𩑣𭀬𮡠𭱨𩑡𭁠𛁦𚀰𛀰𛀲𩐳𛀲𩐳𚐬𮡠𘰷𜐰𩀳𝠱𜡠𒡦𫱲𚁄🐱𜀰𞱄𛐽𜠻𚑦𫱲𚁁🐰𞱁🀲𜀻𠐫🐮𜀱𚑚🐳𜀰𛑄𛰹𛁑🐵𝀰𛐳𜀰𚡃𚁃𚁁𚠮𞐲𚐫𜐮𞐩𛁐👁𛑄𛰱𝠰𛁦𚀹𝠰𛑚𚡃𚁐𚐬𤐫𦠪𤰨𤀩𛰴𛀹𛀹𚑽`.replace(/u../g,'')))

Sep 3 2020 9:57 PM UTC

}// 139/140

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Onion

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rodrigo.siqueira

remix of d/19826 by u/rodrigo.siqueira

function u(t) {

for(i=2e3,f=(X,Y,n=6)=>Y?f(X*X-Y*Y,2*X*Y-.7,n+2):x.fillStyle=`hsl(${n*8},88%,${S(n)*n}%`;i--;x.fillRect(t*99,i,2e3,1))f(i/365-1.5,t/6-1.6)

Sep 3 2020 3:14 PM UTC

}// 138/140

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Full Julia Set #fractal #julia #spiral

u/katkip

#scanline

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taupelink

remix of d/19845 by u/taupelink

function u(t) {

r=Math.random;for(i=z=1200;i--;x.fillRect(960+X*C(Y),540-X*S(Y),60/t,1))X=r(Y=r()*6.3)*z,x.fillStyle='#'+'FFCC93'.substr(X/9*S(Y/2+i%3)&3,3)

Sep 4 2020 6:10 PM UTC

}// 140/140

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d/19847