Hot dweets 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) {

π=Math.PI;h=540;q=S(t)
x.beginPath()
x.arc(960,h,q*q*h,1*π,3*π)
x.stroke()

Feb 28 2017 5:13 PM UTC

}// 74/140

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u/iverjo

Some interesting moirè patterns there
u/donbright

resembles 'circles and squares' fractal a little bit

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SpecialAgent

function u(t) {

w=200,c.width=w;x.C=x.C||x.getImageData(0,0,w,w);for(i=w*w*4;i--;)x.C.data[i]=S(frame*.1+i*(1+t>>0))*255;x.putImageData(x.C,0,0)

Mar 3 2017 9:42 AM UTC

}// 128/140

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SpecialAgent

function u(t) {

q=960;r=q/2;c.width^=0;x.font='9em a';for(i=50;i--;)x.arc(q,r,r,t,i),x.stroke(),x.fillText(String.fromCodePoint(i<<9),q+S(t+i)*q,r+C(t)*5*i)

Feb 28 2017 2:19 PM UTC

}// 140/140

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u/donbright

interesting

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SpecialAgent

function u(t) {

w=960,h=540,a=w+S(t*t)*99,b=h+C(t*t)*99
x.fillStyle=R(S(t)*255,0,128+C(t)*128)
x.fillRect(a,b,9,9)
x.drawImage(c,S(t)-2,C(t)-2,1924,1084)

Feb 26 2017 7:37 PM UTC

}// 137/140

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give it a minute to warm up :)

u/donbright

wow.. smooth and mysterious

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SpecialAgent

remix of d/1582 by u/sawaxon

function u(t) {

c.width=1920;x.font='9em a';
for(i=0;i<300;i++)
x.fillRect(i*5,S(i*5+t*i/200)*400+600,30,30),
x.fillText(':',i*5,S(i*5+t*i/200)*400+600);

Feb 28 2017 6:17 PM UTC

}// 137/140

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SpecialAgent

function u(t) {

w=200,c.width=w,x.C=x.C||x.getImageData(0,0,w,w),x.Q=x.Q||.5;x.Q+=1e-5
for(i=w*w*3;i--;)x.C.data[i]=255*S(t+i*x.Q);x.putImageData(x.C,0,0)

Feb 27 2017 6:09 AM UTC

}// 138/140

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SpecialAgent

function u(t) {

c.width=9;for(i=90;i--;)i%2==0?x.fillStyle=R(0,0,200*S(t+i)):x.fillStyle=R(128*S(t+i)),x.fillRect(i%10,Math.floor(i*.1),1,1)

Feb 26 2017 6:07 PM UTC

}// 124/140

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u/donbright

cooooooool

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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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SpecialAgent

remix of d/1482 by u/SpecialAgent

function u(t) {

w=200,c.width=w,x.C=x.C||x.getImageData(0,0,w,w)
for(i=w*w*3;i--;)x.C.data[i]=(i*i*(t+3000)*1e-7)%64;x.putImageData(x.C,0,0)

Feb 27 2017 9:55 AM UTC

}// 124/140

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SpecialAgent

remix of d/1482 by u/SpecialAgent

function u(t) {

w=200,c.width=w,x.C=x.C||x.getImageData(0,0,w,w)
for(i=w*w*3;i--;)x.C.data[i]=(i*i*(t+3000)*1e-7)%255;x.putImageData(x.C,0,0)

Feb 27 2017 9:55 AM UTC

}// 125/140

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