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/20409 by u/taupelink

function u(t) {

r=Math.random;for(i=k=60;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*18)*32,x.fillStyle=R(h=k*C(S(Y*S(p=X/3-9)*S(q=Y/4-2))-9*Y/p)*q,h*q,h-h*p)

Oct 28 2020 1:31 AM UTC

}// 140/140

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d/20410

u/tomxor

Funky!

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Xen

function u(t) {

if(t<.1)a=new AudioContext,o=a.createOscillator(),o.connect(a.destination),o.start()
x.fill(x.arc(0,0,c.width=o.frequency.value=t*9%64,t,0))

Aug 27 2018 4:27 PM UTC

}// 140/140

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bit of a tweak

u/aleamb

lol! awesome!

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New_Core

remix of d/32070 by u/New_Core

function u(t) {

for(c.width|=j=105;j--;x.beginPath(x.fill()))for(i=6;i--;)x.lineTo(j%26*(b=140+40*S(t))+b*S(a=i*1.04)-t*b*2%b*2,j%8*(240+65*S(t))+b*C(a))

Jun 28 2024 10:30 PM UTC

}// 138/140

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Pjaerr

function u(t) {

c.style.background=R();x.fillStyle=R(...[S,C,T].map(_=>127*(_(t)+1)));a=137.5*frame;r=8*frame**.5;x.fillRect(r*C(a)+960,r*S(a)+540,8,8)

Dec 30 2017 7:50 PM UTC

}// 135/140

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A little bit of Phyllotaxis. http://algorithmicbotany.org/papers/abop/abo…

Show more comments…
u/Pjaerr

btw, changing the angle a from 137.5 to 137.3 or 137.6 produce different, albeit nice, patterns.
u/Bendoman

Second best thing on here by far.
u/dubistdu

WOW
u/trupples

Also.. shouldn't it be 137.5 * pi / 180 ~~ 2.39982772149 as the trigonometric functions take in radians?
u/trupples

137.5 also kind of "isolates" the spirals after a short while while 2.4 does not
u/Pjaerr

Yeah, that'll be it actually. I still thought it looked decent!
u/DiamondDrake

I was just working on a Phyllotaxis dweet, though i was trying to use ellipse that just needs way too many characters
u/@no_identd

Although the point about radians is fully correct, I'd like to point out that the most accurate IEEE single float approximation of this angle in degrees is 137.50777 (which internally becomes 137.5077667236328125)
u/lionleaf

#spiral #flower #plant #botany
u/fujimotos

This is amazingly beautiful.

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keithclark

remix of d/2671 by u/keithclark

function u(t) {

for(a=1e4,J=S(t/=2)/7,c.width=Z=127;a--;)x.fillRect(X=a&Z,Y=a>>7,1,'p}¶¼<¼¶}p'.charCodeAt(Z+Y*C(t)-X*J&15)>>(X*C(t)+Y*J+Z*t)%15&1)

May 3 2017 4:27 PM UTC

}// 132/140

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6 bytes shorter (thanks p01)

u/iverjo

So good!
u/keithclark

Add a ~ before 'p}¶¼<¼¶}p' to invert colours
u/Lazy1337

epic #rotozoom
u/vain

nice rotozommer

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vinca

function u(t) {

for(c.width|=a=.02,x[r='fillRect'](0,0,2e3,2e3),i=360;i--;)x.fillStyle='#C97',x[r](1e3+(500+9*T(.01*i*(t%20)))*C(a*i),530+500*S(a*i),99,2)

Apr 8 2019 1:24 PM UTC

}// 138/140

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SpecialAgent

function u(t) {

if(!t)x.translate(960,542),w=1e3,s=42;for(i=0;i<t%90;i++)X=i*s,W=w-X,x.fillStyle=`hsl(${i*t*64},99%,70%)`,x.rotate(1),x.fillRect(0,0,W,42)

Mar 4 2017 7:04 AM UTC

}// 138/140

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donbright

function u(t) {

限=199
for(m=-限;m<限;m+=(2+t))for(n=-限;n<限;n+=(3+t)){
g=2*m*n
b=m*m+n*n
r=m*m-n*n
x.fillRect(1920/2+frame*g/b,1080/2+frame*r/b,1,1)}

Nov 2 2021 3:12 PM UTC

}// 130/140

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As part of #circlechallenge I go back to the old rational parametrization of the circle from Wildberger's "chromogeometry", which has elements of Euclid. Each frame draws rational points on a circle, and each frame the radius gets bigger. All of the patterns are a kind of optical illusion.

u/donbright

changing '2' and '3' to different numbers will give different patterns

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KilledByAPixel

function u(t) {

for(c.width|=i=15,x.scale(29,29);i--;x.fillText('♩',3+(i-t%1)*10,9+(i+t|0)**3%11))x.fillRect(a=i<5?0:(i-t%4/4-5)*40,9+!a*i*2,a?1:99,a?8:.3)

Jan 27 2021 5:28 AM UTC

}// 139/140

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Sheet Music Generator 🎵 #music

u/ciaccodavide

wow!

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Kwandes

remix of d/12194 by u/23_Skidoo

function u(t) {

for(s=24,t/=8,d=19999,i=4e3;i--;f=C(X/d+t*8)*S(Y/d)+t,x.fillStyle=`hsla(${S(f/2)*d},66%,${40+S(f*f*9)*s}%`)x.fillRect(X=i%81*s,Y=i/81*s,s,s)

Mar 28 2021 3:13 PM UTC

}// 140/140

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