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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rodrigo.siqueira

remix of d/21665 by u/rodrigo.siqueira

function u(t) {

for(i=3e3;i--;x.fillStyle=`hsl(${99*t+i/99},99%,${30+S(i+t)*99}%,25%)`)x.fillRect(138*(7+5*S(i/2)*C(K=i*i+t/2)),99*(3*S(i)+S(K)*C(K)+5),2,2)

Feb 13 2021 4:39 PM UTC

}// 140/140

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Iridiscent colors on a parametric surface

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Pascal

remix of d/21666 by u/katkip

function u(t) {

c.style.filter=`blur(2vw)contrast(99`
for(c.width|=i=244;i--;x.fill(x.arc((X=i%18)*120,(i-X)*8,z=99+99*S(t/6+i/2),4+z/9,z/9)))x.beginPath()

Feb 13 2021 4:30 PM UTC

}// 139/140

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ferrofluid

u/DaSpider

Psychedelic cows!

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rodrigo.siqueira

remix of d/21666 by u/katkip

function u(t) {

c.style.filter=`invert(`
for(c.width|=0,i=244;i--;x.fill(x.arc((X=i%48)*99,T(t/2)*i*9-X*i,z=80+S(t+S(i)*i)*52,5+z/7,7+z/7)))x.beginPath()

Feb 14 2021 1:18 AM UTC

}// 137/140

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Falling moons

u/erin

Bad Apple vibes
u/joeytwiddle

Could be leaves or petals

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Pascal

remix of d/21637 by u/erin

function u(t) {

c.width|=0,w=960
for(i=w*2;i--;x.fillRect(w+w*X/Z,w-Y/Z*w,s=(8/Z)**5,s))
X=3*C(U=i+t)+C(V=t+i/2),Y=C(U)*S((i*3)+t)+C(V)*T(V)-2,Z=S(U)-5

Feb 11 2021 7:39 PM UTC

}// 135/140

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wavy lines

u/Xen

smooth

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tomxor

function u(t) {

// Xorshift 32
R ^= R << 13
R ^= R >>> 17
R ^= R << 5

// U(0,1)
f = (R>>>0)*2**-32
// Plot
x.fillRect(f*2e6%2e3,f*1e3,9,9)
// Seed
R = R||1

Feb 13 2021 12:31 PM UTC

}// 140/140

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#Xorshift 32 #PRNG

u/tomxor

I felt that there are too many extremely unecessarily long examples of xorshift32 implementations out there, with lots of fluff around the outside. It's a very nice and simple little PRNG and this is all the code you need to turn it into a unit interval (i.e the type and range you get from Math.random()): (x>>>0) * 2**-32. This conversion method is far from perfect and results in some bias, but so does the PRNG itself...

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gamseb

function u(t) {

c.width=900
x.font=50+"px sans"
x.fillStyle=R(255,0,0) 
x.fillText("Děkuju!! <3", 200, 200)

Feb 14 2021 11:23 PM UTC

}// 91/140

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reply :)

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rodrigo.siqueira

remix of d/21657 by u/rodrigo.siqueira

function u(t) {

for(c.width=i=2e3;i--;x.fillStyle=`hsl(0,70%,${S(9*t-i)*99}%)`)x.fillRect(136*(7+5*S(i/2)*C(K=i*i+t)),99*(3*S(i)+C(K)*T(K)+5),40,40)

Feb 12 2021 11:12 PM UTC

}// 132/140

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Red laser flow on a #torus surface

u/erin

why do my dweets always spawn these huge movements lol
u/rodrigo.siqueira

Because parametric torus with laser lights can be good source of inspiration :-)

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Kapicka

function u(t) {

c.width=900
x.font=35+"px Terminus"
for(i=27;i--;)
x.fillText('Všchno nejlepší Sebastiane!'.split('')[i],S(t%3.3)*33*i,270)

Feb 14 2021 11:06 PM UTC

}// 124/140

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Greeting to Sebas

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erin

remix of d/21651 by u/erin

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪁼👷🐹𝠰𒡦𫱲𚁩🐲𩐳𞱩𛐭𞰩𮰊𦀽𜠪𠰨𥐽𪐫𭀩𚱃𚁖👴𚱩𚡩𚐬𒡙🐱𚠨𤰨𭀪𜠩𚰰𛠹𚐪𤰨𥐩𚱃𚁖𚐪𥀨𥠩𛐲𛠵𛀊𦠽𤰨𥐩𛐵𒡸𛡦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𤰨𭀩𚠹𞑽𛀶𞐥𛀤𮱓𚀱𜀪𭀫𥐩𚠹𞑽𙐩𨀊𮀮𩡩𫁬𤡥𨱴𚁷𚱷𚡘𛱚𛁷𛑙𛱚𚡷𛁳👷𛱚𛱚𛱚𛁳𚑽`.replace(/u../g,'')))

Feb 12 2021 1:18 AM UTC

}// 140/140

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LASER DONUT #donut #laser #d3

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Pascal

function u(t) {

eval(unescape(escape`⡦ꑯ⡲ꐨ⡣ꐮ⡷ꑩ⡤ꑴ⡨ꑼ⠽ꑩ⠽ꐰ⠻ꑩ⠫ꐫ⠼ꐹ⠻ꐩ⡸ꐮ⡦ꑩ⡬ꑬ⡒ꑥ⡣ꑴ⠨ꐴ⠰ꐰ⠫ꑩ⠪ꐹ⠹ꐫ⡓ꐨ⡴ꐩ⠪ꐳ⠰ꐰ⠬ꐴ⠰ꐰ⠬ꐵ⠰ꐬ⠲ꐰ⠰ꐩ`.replace(/u../g,'')))

Feb 12 2021 10:22 PM UTC

}// 107/140

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cool obfuscation characters