Dweets awesomed by u/jdmngo

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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jdmngo

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 */

Feb 25 2017 1:09 AM UTC

}// 122/140

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u/katkip

#delete

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dh7

function u(t) {

c.width=1920; /* Feel like I'm 11 now */
for(i=0;i<777;i++){
  r=S(t)*400+C(t+i*t/7777)*100
  x.fillRect(960+r*C(t+i), 520+r*S(t+i), 7, 7) }

Feb 24 2017 8:49 PM UTC

}// 140/140

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u/sigveseb

with comments :)

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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… 🕶

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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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iverjo

remix of d/89 by u/iverjo

function u(t) {

c.width^=0;for(i=5e3;i--;)p=3*t+S(t/2)*i/3e3+i%4/.637,d=C(p)-S(p),d>0&&x.fillRect(960+199*S(p)+249*S(t/.7+i/6e3),i/4-2,199*d,1/(d+1))

Feb 24 2017 6:50 PM UTC

}// 133/140

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u/SpecialAgent

nicely done!
u/Kalanchoe

Flawless!
u/donbright

oh wow, the shading!
u/sigveseb

Good twister! Can we add color?
u/iverjo

Color would be awesome :) Feel free to try to add it
u/sigveseb

https://www.dwitter.net/d/1267 red
u/iverjo

Here's a purple version. Had to make some compromises. https://www.dwitter.net/d/1278
u/donbright

i attempted a rainbow version https://www.dwitter.net/d/1282
u/iverjo

#twister
u/vain

nice twister

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iverjo

remix of d/104 by u/iverjo

function u(t) {

c.width^=0;for(i=9;i<2e3;i+=2)s=3/(9.1-(t+i/99)%9),x.beginPath(),j=i*7+S(i*4+t+S(t)),x.lineWidth=s*s,x.arc(960,540,s*49,j,j+.6),x.stroke()

Feb 24 2017 6:47 PM UTC

}// 138/140

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u/SpecialAgent

my hat goes off to you sir!
u/Kalanchoe

That's unbelievable
u/iverjo

Try this one in fullscreen for a more immersive experience
u/Niklas

impressive!
u/donbright

:)
u/aendrew

This is incredible.
u/vonzo

reminds me to Gescom <3
u/hvge

http://www.pouet.net/prod.php?which=3397 ❤️
u/badthai

How did you come up with this?
u/iverjo

@badthai: First I made a classic tunnel effect (like this: https://www.dwitter.net/d/205). Then I made several remixes of it by tweaking parameters. This was one of the results. See also https://www.dwitter.net/d/106
u/iverjo

#tunnel
u/vain

cool segmented tunnel fly

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bligglenuber

function u(t) {

w=600;c.width=w*2;a=60+10*S(t/3);b=200;d=150;e=a-b;for(var i=0;i<500;i++){m=i*e/b;x.lineTo(w+e*C(i)+d*C(m),w/1.8+e*S(i)-d*S(m))};x.stroke();

Feb 24 2017 4:56 PM UTC

}// 140/140

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u/dogspace

limacons are my fav polar shape!

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gormisdomai

remix of d/1192 by u/gormisdomai

function u(t) {

c.width=1920;
for(i=0;i<200;i++)
x.fillRect(950+T(t+i)*900, 0, 20, 2000)
for(i=0;i<200;i++)
x.fillRect(0, 350+T(t+i)*900, 2000, 20)

Feb 24 2017 2:33 PM UTC

}// 131/140

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"Dislocation #3"

u/katkip

#tagfail

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BNeutral

function u(t) {

w=t/1.4;s=100/t;v=80/t;x.fillStyle=R(255*S(w));x.fillRect(v*16*Math.pow(S(w),3)+960-s/2,540-s/2-v*(13*C(w)-5*C(2*w)-2*C(3*w)-C(4*w)),s,s);

Feb 24 2017 9:54 AM UTC

}// 138/140

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u/Kalanchoe

cute!
u/iverjo

#heart
u/ItzChimp

Do you have to use Math.pow here? Can't you use ** instead?

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Birdinadream

function u(t) {

q=255;b=540;x.fillStyle=R(9,9,9,.1);x.fillRect(0,0,1920,2*b);x.fillStyle=R(q,q,q,1);for(i=0;i<99;i++)x.fillRect(b+i+T(t)*99,b+C(t*i)*b,6,2)

Feb 24 2017 8:41 AM UTC

}// 139/140

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paberr

remix of d/1053 by u/paberr

function u(t) {

w=1920;h=1080;k=window;m=10;l=Math.random;x.fillRect(k.b=(((k.b||(w/2))+(l()>.5?m:-m))%w+w)%w,k.g=(((k.g||(h/2))+(l()>.5?m:-m))%h+h)%h,m,m)

Feb 23 2017 7:00 PM UTC

}// 139/140

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u/Kalanchoe

wow! here's a 103 byte version if you want to add color or something: w=1920;h=1080;f=()=>Math.random()>.5?10:-10;t?x.fillRect((b+=f()+w)%w,(g+=f()+h)%h,10,10):(b=w/2,g=h/2)
u/iverjo

Looks like this dweet is getting "awesomed" a lot due to an exploit in another dweet
u/lionleaf

#random #walk #random_walk
u/taupelink

#randomwalk

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