Dweets awesomed by u/tomxor

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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Pascal

remix of d/21699 by u/Xen

function u(t) {

for(c.width=i=1e3;i--;x.arc(500,281,260,i+T(i+t/5)*C(t/1.1)*S(t/2)+t,i-t))x.lineWidth=.07;x.stroke();c.style.filter=`contrast(1.7)invert(.3`

Feb 17 2021 6:57 PM UTC

}// 140/140

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Xen

remix of d/21698 by u/Qwitter

function u(t) {

c.style.filter="blur(5px)contrast(2)invert("
for(c.width=i=200;i--;x.arc(99,56,55,i*t/5^t,i))x.strokeStyle="#"+frame;x.stroke()

Feb 17 2021 4:02 PM UTC

}// 127/140

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Demonic Evolution

u/Xen

Fullscreen at night for 40seconds ;-)
u/Qwitter

(while chanting "we are Legion" of course )
u/Xen

Thats'a Gibbon
u/tomxor

Half expecting to see a monster from DooM teleport through it !

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Qwitter

remix of d/21697 by u/Pascal

function u(t) {

c.style.filter="blur(1vw)contrast(9)invert("
for(c.width=98,i=200;i--;x.arc(49,55,40+C(2*t)*15,i*7-3*t,i))x.strokeStyle="#e62";x.stroke();

Feb 17 2021 3:31 PM UTC

}// 138/140

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Bꜷbble's Breath

u/Xen

ooooo nice!

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rodrigo.siqueira

remix of d/21688 by u/Xen

function u(t) {

c.width|=c.style=`filter:invert(`;
for(var 𓁿=2e3;𓁿--;x.arc(960,540,400,11+4*S(𓁿*𓁿+t/15),30))
x.lineTo(960,540),x.lineWidth=.05;x.stroke()

Feb 16 2021 10:34 PM UTC

}// 137/140

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Illuminati eye (The All-Seeing Eye of providence) #pyramid #light 👁⃤

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Xen

remix of d/5538 by u/wackytman

function u(t) {

for(c.width=i=1e3;i--;x.arc(480,270,200,i*i,t*C(i*(t|0))))x.lineWidth=.1;x.stroke()

Feb 16 2021 5:35 PM UTC

}// 83/140

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slight golf and play (calming lines)

u/tomxor

ooh

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rodrigo.siqueira

remix of d/21681 by u/rodrigo.siqueira

function u(t) {

for(i=3e3;i--;x.fillStyle=`hsl(${99*t+i/59},99%,${30+99*S(i+t)}%,25%)`)x.fillRect(960+570*C(i)*C(K=i/4)*S(t),500*C(i)*S(i+t)+540,2,2)

Feb 16 2021 3:26 PM UTC

}// 133/140

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Changing colors #butterfly

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rodrigo.siqueira

remix of d/21669 by u/Pascal

function u(t) {

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

Feb 16 2021 1:39 AM UTC

}// 140/140

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Liquid dripping

u/tomxor

looks like #mud
u/joeytwiddle

#metaballs

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cantelope

function u(t) {

eval(unescape(escape`𤠽𬐽🠨𫐫𬐩𚠪𜰻𩡯𬠨𨰮𭱩𩁴𪁼🐰𛁭🐲𩐳𛁨🐱𩐳𛁸𛡲𫱴𨑴𩐨𛠵𚐻𫐭𛐻𮀮𩡩𫁬𤡥𨱴𚁨𚱘𛱚𛁙𛱚𛀹𛀹𚐩𩀽𦀽𜠫𤰨𬀽𤠨𜐩𚐬𦐽𠰨𬀩𛁘𚠽𤰨𬀽𤠨𜠩𚐬𦠽𠰨𬀩𚡤𛁙👓𚁰👍𨑴𪀮𨑴𨑮𜠨𦐬𦠩𛑓𚁴𚐪𝀩𚠨𩀽𣑡𭁨𛡨𮑰𫱴𚁙𛁚𚐩𛁚👃𚁰𚐪𩀯𪀫𛠰𜀸`.replace(/u../g,'')))

Feb 16 2021 12:43 AM UTC

}// 140/140

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u/384.cz

#donut

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Odog8

remix of d/21661 by u/Odog8

function u(t) {

t?x.fillRect(y%16+1,~~(y/16)+1,1,'ﰀꯀúʰΠ,฀೬㠀ೋೋ㌀ᄛᕛᕛ啬䑬㠀ʰຠꯀϪﰀ?'.charCodeAt(y/8).toString(4).split``.reverse()[y++%8]/3):(c.width=40,y=0)

Feb 15 2021 12:33 AM UTC

}// 140/140

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Boo Ghost! 4 colors!

u/tomxor

#pixelart #sprite
u/rodrigo.siqueira

~~(y/16)+1 can be changed to y/16 with almost no difference
u/Xen

slight golf t?x.fillRect(y%16,y/16,1,'ﰀꯀúʰΠ,฀೬㠀ೋೋ㌀ᄛᕛᕛ啬䑬㠀ʰຠꯀϪﰀ?'.charCodeAt(y/8).toString(4).split.reverse()[y++%8]/3):y=c.width=28

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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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