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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KilledByAPixel

remix of d/14822 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𬠽𦀽🡓𚀨𦁼𜀩𚠪𚁙𯀰𚐩𞱬👟🐾𬠨𦀩𚠨𜐭𦀥𜐩𚱘𙐱𚡲𚁘𚰱𚐻𮀮𩁲𨑷𢑭𨑧𩐨𨰬𜀬𛐱𚐻𩡯𬠨𪐽𜡥𜰻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚁩𛀱𜀷𞀬𜐬𬐪𜰩𚑘👩𛰳𜀰𚰹𛁙👴𛁱🐴𞐪𚀨𜐭𦐥𜐩𚡬𚀩𚱙𙐱𚡬𚁙𚰫𚐩𛁸𛡦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𬐭𜐸𜁽𘀤𮱱𯐥𙁻𝐰𛑱𯐥𨀻`.replace(/u../g,'')))

Jun 28 2019 11:43 PM UTC

}// 140/140

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Antarctica

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robbyg

function u(t) {

c.width=192
x.arc(76,28,3,0,7)
x.arc(116,28,3,0,7)
x.fill()
x.fill(new Path2D(`M86 44 Q96 ${34-C(t)*10},106 44T106 64T86 64T86 44`))

Jun 27 2019 6:41 PM UTC

}// 133/140

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Comedy/Tragedy

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Xen

function u(t) {

for(i=1e3;i--;)x.fillText(i,i|t*i,i)

Jun 27 2019 6:15 PM UTC

}// 36/140

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36byte #sierpinski triangle

u/KilledByAPixel

Nice! You can also use & instead of | for a slightly different style. i&i/t is also good
u/Xen

i'd say the last is my fav i&i/t
u/donbright

ugh i dont understand how it works.

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taupelink

function u(t) {

c.width|=0;f=X=>{for(i=2;i*i<=X;i++)if(X%i==0)return i+'*'+f(X/i);return X};k=frame/6|0;x.font='5em"';x.fillText(k+'='+f(k),0,540)

Jun 28 2019 1:01 AM UTC

}// 130/140

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factorization into #prime products. #math

u/taupelink

simple #recursion #recursive
u/Xen

very clever
u/katkip

wow
u/donbright

#numbertheory

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magna

function u(t) {

t||(p=performance.now())
x.fillRect(t*9,540-(m=Math.log(t-(performance.now()-p)/1000)*10),1,m*2)

Jun 30 2019 5:20 PM UTC

}// 97/140

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Dwitter runtime t versus performance.now()

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username

remix of d/14792 by u/Xen

function u(t) {

for(i=1e3;i--;)x.fillText(i,i&i/t,i)

Jun 29 2019 8:35 AM UTC

}// 36/140

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u/katkip

u/KilledByAPixel

;) https://www.dwitter.net/d/13314

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KilledByAPixel

function u(t) {

c.width|=0
for(j=2093;j--;x.lineTo(j+(.1+q)*19*S(X=j/9+y/9+t*9),y+540))y=C(j/9)*540,q=(j-960)**2+y**2<2e5
x.fill()

Jun 27 2019 5:14 PM UTC

}// 114/140

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Circle in Waves

u/joeytwiddle

Nice. Novel!
u/magna

Great!
u/katkip

wow
u/katkip

#waves

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username

remix of d/14830 by u/pavel

function u(t) {

for(w=j=c.width|=f=o=>500*C(q=22/7/(3+-~o*5%8))/C((a+t)%(2*q)-q);a=44/7*--j/w;x.arc(960,540,f(t+1)*e+f(t)*(1-e),a,a))e=(t%1)**9
x.fill()

Jun 29 2019 7:01 PM UTC

}// 136/140

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find out what I changed. I mean you could use some diff software , but that is lame

u/username

here is the difference (if you can resist checking it out, you are a real ninja): https://jsfiddle.net/xbg7duzn/
u/joeytwiddle

I see it! Thanks to paste (undo redo) x N
u/username

wow, I tried to do it as well, but without knowing what it is, seems tricky

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katkip

remix of d/14792 by u/Xen

function u(t) {

t*=2;for(i=999;i--;)x.fillStyle=R(256-i%t*i),x.fillRect(i,i^i*t,6,6)

Jun 28 2019 6:00 PM UTC

}// 68/140

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katkip

function u(t) {

for(c.width|=k=9;k--;)for(j=11;j--;){x.beginPath();for(i=4;i--;)x.fill(x.arc(160*j*1.2+C(i*1.6)*99,140*k+S(i*1.6)*99*C(j+t*3+k*1.6),0,0,0))}

Jun 29 2019 7:34 AM UTC

}// 140/140

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change all 1.6 to 1.57 for perfect squares #square #arc