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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taupelink

remix of d/19699 by u/taupelink

function u(t) {

r=Math.random;for(i=z=1e3;t*i<i--;x.fillRect(z/X-z,2*Y*z,W,H))W=S(X=r(Y=r()))*S(Y-3)*50,H=4*W,x.fillStyle='#'+'369CFFC963'.substr(W*X/Y&7,3)

Aug 18 2020 3:57 AM UTC

}// 140/140

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d/19720

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dweetbleep

function u(t) {

for(t||(Y=0),X=2e3;X--;)x.fillStyle=R(r=255*C(t/C(X/t)+t/S(Y/t)+t),r*T(X/t),T(t),1-r),x.fillRect(X,0,1,5);x.drawImage(c,0,5),Y++

Aug 17 2020 11:51 PM UTC

}// 129/140

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dweetbleep

function u(t) {

for(x.fillRect(0,0,i=2e3,i);i--;x.fillStyle=R(255*S(i),0,255*S(i*i+2*t),.1))x.clearRect(960+C(i+3*t)*1e3*C(t+i),540+S(i+t)*1e3*S(t+i),9,9)

Aug 17 2020 11:33 PM UTC

}// 140/140

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hauntedg

function u(t) {

w=c.width=1920
for(i=0;i<20;i++){
k=(i*145+t*1000)%(w+1000)
x.beginPath()
x.moveTo(0,k)
x.lineTo(k-S(5*t)*200,0)
x.lineWidth=i
x.stroke()
}

Aug 16 2020 8:28 PM UTC

}// 140/140

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Learning the trade

u/Xen

nice
u/Xen

for(w=c.width|=i=20;i--;x.stroke())x.moveTo(!x.beginPath(x.lineWidth=i),k=(i*145+t*1e3)%(w+1e3)),x.lineTo(k-S(5*t)*200,0)
u/hauntedg

Thanks, as the title implies, this was my first dwit, still new at this

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Xen

remix of d/19709 by u/dweetbleep

function u(t) {

for(c.width|=i=z=1e3;i--;x.lineTo(z+z*C(Z=i*t),500+z*S(Z)));x.stroke()

Aug 18 2020 6:23 PM UTC

}// 70/140

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quick play

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New_Core

remix of d/19681 by u/danny@hille.dk

function u(t) {

c.width=99
a=[68,87,73,84,84,69,82]
for(i=7;i--;)x.fillText(String.fromCharCode(a[i]+19**S(t-i/9)),20+9*i,30)

Aug 16 2020 9:30 AM UTC

}// 109/140

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hauntedg

function u(t) {

c.width=1920
for(i=20;i--;)x.fillStyle=`hsl(${99*S(2*t+i)},90%,50%)`,j=.31*i,r=400*C(t),x.fillRect(940+r*C(j),520+r*S(j),10*i,10*i)

Aug 17 2020 10:39 AM UTC

}// 132/140

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Still having fun

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jellyedwards

remix of d/19684 by u/jgobi

function u(t) {

for(c.width|=i=400;i--;x.fillRect(960-6+C($)*_,540-6+S($)*_,12,12))$=i/999*Math.PI*t,_=500*S(t+i/4),x.fillStyle=`hsl(${_},99%,50%)`

Aug 15 2020 9:26 PM UTC

}// 131/140

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Kinda looks like sand on speaker resonance

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tomxor

remix of d/19655 by u/tomxor

function u(t) {

eval(unescape(escape`𭑛𭁼𮀮𩡩𫁬𤡥𨱴𚁸𛡧𫁯𨡡𫁁𫁰𪁡🐱𛱴𛀰𛀲𩐳𛀲𩐳𚑝👛𞐶𜀬𝐴𜀬𜰬𜰯𭁝𞱵👴🱵𛡭𨑰𚀨𦱏𛁯𛁡𛁢𧐩🐾𚁵𛡭𨑰𚀨𦱒𛁍𧐩🐾𚁔👯𛑍𛁘👏𛑒𛁦🐨𦀪𦀯𜰫𥀪𥀯𜰩𚠪𜐮𝐯𝀸𚰲𛁡𛐽𦀯𩠬𨠭👔𛱦𚐩𛁸𛡣𫁥𨑲𤡥𨱴𚁏𛁯𛀹𛀹𚐬𦱏𚱡𛁯𚱢𛁡𛁢𧐩𚐺𦱝`.replace(/u../g,'')))

Aug 13 2020 7:52 PM UTC

}// 140/140

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#nbody #gravity

u/tomxor

... #waitforit initialising chaos quickly is hard
u/tomxor

This is not very accurate of course, in particular it has quite bad iteration bias - and it's possible my math is wrong. It kinda looks right though I think.
u/Xen

sexy!
u/DataMeta

wow, cool! #physics #simulation

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Xen

remix of d/19684 by u/jgobi

function u(t) {

for(i=c.width|=0;i--;x.fillRect(960-6+C($=i/_*t)*_,540-6+S($)*_,29,9))x.fillStyle=`hsl(${_=500*S(t+i)} 99%50%)`

Aug 15 2020 5:27 PM UTC

}// 111/140

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quick test