Dweets awesomed by u/SpecialAgent

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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SpecialAgent

function u(t) {

w=960,h=540,x.strokeStyle=R(255*T(t*t),255*S(t),255*C(t),0.03)
x.strokeRect(w+S(t)*w,h+C(t)*h,10,10)
x.drawImage(c,S(t),-C(t>>10),w*2,h*2)

Feb 25 2017 9:50 AM UTC

}// 138/140

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Just messing around

u/5Mixer

Nice, looks super smooth, like paint. I need to mess around with not clearing the screen more :)

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walsh9

function u(t) {

T=t*60|0,d=T%64*33,e=(T>>6)*36,s=d<1||Math.random()>.5&&e>1,f=s?8:33,g=s?36:8,x.fillRect(d,e,f,g),x.lineWidth=16,x.strokeRect(0,0,1920,1080)

Feb 25 2017 8:04 AM UTC

}// 140/140

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u/donbright

hey that is super cool
u/sigveseb

reminds me of the old C64 BASIC maze: http://www.slate.com/content/dam/slate/artic…
u/walsh9

I'm using this 'binary tree' maze algorithm: http://weblog.jamisbuck.org/2011/2/1/maze-ge…

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SpecialAgent

function u(t) {

π=Math.PI;r=960;a=r+r*C(2*π*t/6);b=r+r*S(2*π*t/6);p=new Path2D('M960 540 L '+a+' '+b+'Z');x.stroke(p)

Feb 25 2017 7:26 AM UTC

}// 101/140

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5Mixer

function u(t) {

w=c.width=2e3
o=0
while(o++<9){l=r=o
x.fillStyle="#"+o*22
q=t*o
while(l<w+q){r=(r*9e2)%23e4
s=r/(w*99)*70
x.fillRect(l-q,w/2-s*9,s,r)
l+=s}}

Feb 25 2017 5:26 AM UTC

}// 140/140

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Cityscape! At 170 chars I had it moving quickly, and with much, much better randomisation. To see the paralax work, multiply q=t*o by 10. I would have loved to have had a little car emoji too, but oh well, I'm still new. I've spent way too long trying to shorten this lol.

u/SpecialAgent

You can remove the brackets around r=(r*9e2) to gain an extra two characters, since both * and % fall in the same operator precedence group, then q=t*9 works. Good dwit!
u/Renaud___

s=r/(w*99)*70 can be replaced by s=.7*r/w too it seem
u/SpecialAgent

correction, q=t*o*9 works
u/lionleaf

If you change the dweet itself you can post directly and it becomes a remix. Post the moving one!
u/5Mixer

Woah, thanks for the replies guys. I looked for ages and didn't spot those chars :) Remixed it moving faster.

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hamptonio

remix of d/134 by u/icecuber

function u(t) {

r=Math.random;q=1;for(i=36;i--;)for(j=12;j--;)q+=.5-r()/2,x.setTransform(C(t+j),S(t+i),-S(t+j),C(t+i),i*66,j*99),x.fillRect(-9,-30,q/2,10)

Feb 25 2017 4:06 AM UTC

}// 138/140

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u/magna

I want a curtain like this in my living room!
u/joeytwiddle

That took me to http://www.pouet.net/prod.php?which=564#fukw…

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gormisdomai

function u(t) {

c.width=999
w=20
for(X=-6;X<7;X++)
for(Y=-6;Y<7;Y++){
x.beginPath();x.arc((X+S(t)*Y%7)*w+450,(Y+C(t)*X%7)*w+260,w,0,7,0);x.stroke()}

Feb 25 2017 1:05 AM UTC

}// 133/140

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u/iverjo

Cool, it almost looks like 3D
u/gormisdomai

You're right, maybe I should not try to make one which actually does the 3D rotation calculations

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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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spbyrne

function u(t) {

λ=1920;Ω=1080;x.fillStyle=R(Ω/4,0,0,.01);x.fillRect(0,0,λ,Ω);for(i=0;i<35;i++){x.beginPath();x.arc(λ/2,Ω/2,(t/4)%1*i*i,t,-t);x.stroke()}

Feb 24 2017 7:01 PM UTC

}// 136/140

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u/katkip

dweet 1234

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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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Show more comments…
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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Show more comments…
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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