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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Current theme challenge: #Food

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Hypixel

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300+ 2,300,50,200)
 // draw 50x200 rects

Mar 3 2018 8:01 PM UTC

}// 116/140

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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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Xen

remix of d/14887 by u/Blacklink

function u(t) {

for(c.width|=i=111;i--;x.stroke())x.beginPath(x.lineWidth=(q=(t*5*(i+t))%1e3)/8),x.arc(980,540,q,i+t/i,i+t/i+1)

Jul 2 2019 7:27 PM UTC

}// 111/140

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had to have a play with this one

u/Xen

#spiral

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anotherkitten

function u(t) {

x.fill(p = new Path2D(),p.arc(960,540,270,0,8))

Sep 16 2020 3:02 PM UTC

}// 47/140

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Comment with something for me to add to this, will remix with one suggestion per iteration (until its too complex to continue)

u/danny@hille.dk

a tail
u/anotherkitten

tail added! d/19979

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KilledByAPixel

remix of d/15051 by u/KilledByAPixel

function u(t) {

r=Math.random(A=[])*256|0
for(f=960;f--;)for(a=i=0;i++<32;A[i]=r&2**(4*a+2*(a=!!A[i])+!!A[i+1]))x.fillRect(i*4+r*r%2e3,f*4+t*600+99,z=a*4,z)

Mar 17 2022 4:16 AM UTC

}// 140/140

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Automaton Towers

u/Joachim

nice #city

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rodrigo.siqueira

remix of d/29690 by u/Joaozin003

function u(t) {

with(x){fillStyle=R(t*499,t*250,0,t*t)
fillRect(0,0,1920,1080)
translate(192,108)
rotate(.1)
scale(0.9,0.9)
translate(-60,-140)}

Mar 25 2024 11:50 PM UTC

}// 128/140

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A light at the end of the spiral

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magna

function u(t) {

c.width=1920
x.globalCompositeOperation='xor'
for(i=18;i--;)x.fillRect(400+i*50+S(t)*300,400+i*S(t/9)**9*200,2e3,200)

Apr 19 2021 12:25 AM UTC

}// 117/140

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#default xor #glitch

u/magna

#waitforit
u/DataMeta

whoa! nice one

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BuRRak

function u(t) {

t||(A=S=K=L=G=0);onkeydown=e=>self[e.code[3]]+=10;x.fillRect(S-A,L-K,10,10);G==0||(c.width|=G=0)

Feb 24 2018 5:08 PM UTC

}// 96/140

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Etch a Sketch, AS - left knob CCW and CW, KL - right knob CCW and CW, G - shake

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u/snydej

I haven't figured out why yet but once I press "[" or "]", G stops working but A, S,K, and L still work.
u/BuRRak

Yeah, i have that issue too. Very weird
u/zanella

It's because, when you hit [ or ], e.code[3] evals to c (fourth letter in BracketLeft and BracketRight). Then, self[c] overrides the c variable, which is the reference to the canvas, and because of that c.width|= stops working. The other keys still work because x still points to the canvas context, which is what draws the rectangles. ;)
u/zanella

You can fix this and also code golf 4 characters:
u/zanella

t||(a=s=k=l=g=0);onkeydown=e=>self[e.key]+=10;x.fillRect(s-a,l-k,10,10);g==0||(c.width|=g=0)
u/snydej

zanella: I'll give you the golf, but it's not a fix. It'll break if you press x or c. Not that I care too much; this dweet is quite clever even if no one should ever do this in practice.
u/snydej

Btw thanks for the explanation :) Also I golfed 9 more characters off it: t?g?c.width|=g=0:onkeydown=e=>self[e.key]+=10:a=s=k=l=g=0;x.fillRect(s-a,l-k,10,10)
u/zanella

u/snydej You're right, it's not a fix if it breaks something else. :D And I agree, this dweet is totally ingenious!
u/zanella

The unavoidable remix: https://www.dwitter.net/d/7102

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magna

remix of d/28532 by u/magna

function u(t) {

eval(unescape(escape`󭍼󯌨󨼮󭽩󩍴󪌽󜜲󞌩󞽦󫽲󚍩󟜳󩜳󞽩󛜭󞽸󛭦󪝬󫍒󩝣󭌨󦌬󦜬󜜬󛬳󚜩󢜽󪜪󝼫󩭲󨝭󩜥󝼬󦌽󢜦󜜲󝼬󦜽󢜾󟬸󛍸󛭦󪝬󫍓󭍹󫍥󟝠󪍳󫌨󙍻󣝡󭍨󛭨󮝰󫽴󚍘󛜶󝌭󠼨󭌯󝜩󚬶󝌬󦜭󜼶󛜨󤼨󭌯󜼩󚬳󝬩󚜯󜬪󦽓󚍘󧭙󚜪󝼬󦌦󦜬󝜹󛍘󧭙󛍘󛍩󛼹󛍙󛍘󚭙󧝛󭌦󝽝󯜠󞜹󙜵󜌥󨌻`.replace(/u../g,'')))

Sep 22 2023 2:40 AM UTC

}// 140/140

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Never get boring

u/cantelope

wow
u/_louis

so cool *o*
u/andrea270872

Tron-ish... cool!
u/Joachim

#magic

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dweetbleep

function u(t) {

w=2e3;for(c.width=i=w;i>=0;i-=100)for(j=0;j<2e3;j+=10){i2=i-w/2;j2=j-540
d=Math.sqrt(i2*i2*+j2*j2*j)/6
o=9+C(d-t*6)*6
x.fillRect(i,j,o,o)}

Aug 18 2020 12:11 AM UTC

}// 138/140

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