Random dweets | Dwitter

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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taupelink

remix of d/31679 by u/taupelink

function u(t) {

f=u=>((u%6-3)**2-4-Y/6)**2/3|0;for(i=1e4;i--;x.fillRect((i>>2)%9*240+9*r*C(h),i%5*240-9*Y,t<8,f(r-Y)==f(r/4+22*h)))r=i*t%13,h=r*i%7,Y=r*S(h)

Jun 20 2024 9:46 PM UTC

}// 140/140

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d/32044

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taupelink

remix of d/36147 by u/taupelink

function u(t) {

eval(unescape(escape`昽甽㸨㐪䌨甯㐩⨪㈭㈩⨪㌭㠪䌨甯㌭眩㭦潲⡩㴱攴㭩ⴭ☦琼㠻砮晩汬剥捴⠹㘰⭲⩃⡩⤬㔴〫爪匨椩ⱷⱷ⤩爽琥㈪ㄸ〫ㄸ〬砮晩汬却祬攽刨漽ㄴ㐫㘪昨眽ㄫ㐪琪⨮㔩Ɐ⬽㠪昨眫㠪椩Ɐ⬽㘪昨眭㘪椩ⰲ⽯⽷⤠`.replace(/u([^D].)/g,'$1%')))

Sep 8 2026 9:15 PM UTC

}// 140/140

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d/36261

u/taupelink

Runtime approx 8 seconds

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katkip

function u(t) {

c.width=100;for(i=0;i<100;i++)for(j=0;j<100;j++)if(Math.cos(i*j*parseInt(t*2))<0)x.fillStyle=R(i,j,frame%256),x.fillRect(i,j,1,1)

Aug 18 2018 6:41 PM UTC

}// 129/140

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Amazing structures. Looks like a GOL. Visualizing: cos(x*y*{1,2,3...infinity})<0

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SpecialAgent

function u(t) {

a=1103515245,c=12345,m=0x7fffffff,z=t;for(i=111;i--;)z=((a*z+c)%m),g=z&0x3fffffff,z=((a*z+c)%m),h=z&0x3fffffff,x.fillRect(g%1e4,h%1e3,9,9)

Feb 24 2017 8:19 PM UTC

}// 138/140

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A pseudo-random number generator. The parameters you see is used in glibc, it gives a good visual on distribution. If you changed m=0x80000000 (m as used in IBM's C/C++) you will quickly see a bias in the randomness. Oh the irony! Here are some other popular parameters you can try: Borland C/C++: a=22695477,c=1,m=0x100000000 Turbo Pascal: a=134775813,c=1,m=0x100000000 Visual Basic 6: a=1140671485,c=12820163,m=0x1000000 Java: a=25214903917,c=11,m=0x1000000000000 Many more: https://en.wikipedia.org/wiki/Linear_congrue… 🕶

Show more comments…
u/iverjo

This is the probably the best PRNG dweet thus far
u/sigveseb

cool stuff
u/issafly

fullscreen it and stare into it like one of those stereograms for the extra special good.
u/SpecialAgent

thanks folks! also the speed is crippled for dramatic effect, change the loop to "for(i=1e3;i--;)" for turbo mode.
u/iverjo

Speaking of stereograms, it would be cool if anyone could create a stereogram dweet
u/SpecialAgent

Sorry for the malformed link to wikipedia, here is the corrected URL: https://en.wikipedia.org/wiki/Linear_congrue…

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rodrigo.siqueira

remix of d/19333 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(`
for(var i=4e3;i--;f(960,520,600,t*i))f=(X,Y,s,r)=>s>9?f(X+s*S(r),Y+s*C(r),s/2,C(t+i)-r*2):x.fillRect(X,Y,t<5,1)

Jul 6 2020 1:58 AM UTC

}// 135/140

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Hexa-Convergence II

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cantelope

remix of d/28379 by u/1

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪀽𜰰𜀬𪐽𝠻𪐭𛐻𮀮𬱴𬡯𪱥𚀩𚑦𫱲𚁸𛡢𩑧𪑮𤁡𭁨𚀩𛁪🐴𞱪𛐭𞰩𨐽𦱓𚁰🐱𛠵𝰪𪠫𛠷𞀵𚐬𠰨𬀩𛀮𝰪𚁩🀳🰱𞠭𜐩𧐬𬐽𭀫𣑡𭁨𛡡𭁡𫠲𚁘👡𦱩𙐳𧐬𨑛𚁩𚰲𚐥𜱝𚐬𮀮𫁩𫡥𥁯𚀱𝐰𚱓𚁱𚐯𚁚🐲𚱃𚁱𚐩𚠨𪀽𞐹𚐬𪀫𚁡𦰨𪐫𜐩𙐳𧐩𛱚𚡨𚐻`.replace(/u../g,'')))

Sep 2 2023 9:19 PM UTC

}// 140/140

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'er ya go :D

u/1

thanks! I can't tell how much of that is my code.. lol

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gpolonus

function u(t) {

r=Math.random
w=r()
h=r()
x.beginPath()
x.arc(w*1920,h*1080,50,0,2*Math.PI)
x.fillStyle=R(255*w,255*h,255,0.5)
x.fill()

Mar 5 2019 4:22 PM UTC

}// 119/140

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Raindrops

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fufuhaaa

function u(t) {

x.fillStyle='hsl('+(t*9/Math.PI)*350+',100%,'+(50+S(t/5)*40)+'%)';x.fillRect(c.width/2+C(t*9)*t*25,c.height/2+S(t*9)*t*25,9+t*2,9+t*2)

Feb 22 2017 12:17 AM UTC

}// 134/140

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u/lionleaf

Awesome colors!

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rodrigo.siqueira

remix of d/34073 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(i=4e4;i--;x.fillRect(680+680*S(i%2)+C(k=i*i*60)*800/Z,540-S(k)*800/Z,.1,t<2))r=S(w=i*i/t)-t,Z=(S(i*13))*6-.1/t

Jul 1 2025 2:09 PM UTC

}// 139/140

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Electrostatic charges

u/cantelope

no it's an owl

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farter

function u(t) {

c.width=16;c.height=9;s=n=>(S(n)+1)/2*255;for(i=16;i--;)for(j=9;j--;){x.fillStyle=R((s(t+i)),(s(t+j)),s(t));x.fillRect(i,j,1,1)}

Mar 4 2017 8:22 AM UTC

}// 128/140

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play with zooming artifact depending on browser canvas implementations