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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: #Opposites

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pavel

remix of d/3599 by u/Xen

function u(t) {

t*=2;x.fillStyle=`hsl(${~~t*45},69%,50%`
x.fillRect(w=640,h=360,w,h);o='00012221'
x.drawImage(c,0,0,3*w,3*h,w*o[t+2&7],h*o[t&7],w,h)

May 4 2019 2:08 AM UTC

}// 132/140

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Magic #carpet ride #sierpinski #fractal

u/Xen

much better :)

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rodrigo.siqueira

remix of d/13569 by u/rodrigo.siqueira

function u(t) {

x.globalAlpha=.2;x.beginPath()
if(t<31.41)for(i=9,j=.1,X=960,k=Y=580;k/=1.9,i--;j*=-2)
X+=S(f=2*t*j)*k,Y-=C(f)*k,x.lineTo(X,99+Y);x.stroke()

May 1 2019 10:53 PM UTC

}// 140/140

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Tricircle #epicycles #fractal #spirograph

u/DataMeta

Very neat!
u/pavel

beginPath does not have any arguments so you can golf like x.beginPath(x.globalAlpha=.2)
u/13thptr

smooth

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katkip

remix of d/4509 by u/ben

function u(t) {

function v(a,b,g,r){if(r>2){x.fillRect(a+=r*S(g),b-=r*C(g),C(t),2)
v(a,b,g+t+S(t+r),r*=.7)
v(a,b,g-t+S(t-r),r)}}c.width=500
v(250,220,0,80)

Aug 10 2018 4:36 PM UTC

}// 139/140

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Changed the #fractal, optimized and played a lot with this kewl project!

u/katkip

"Fidget Spinners Heaven" lol

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rodrigo.siqueira

remix of d/29136 by u/rodrigo.siqueira

function u(t) {

for(t?Y++:Y=0,X=3e3;X--;x.fillRect(X,Y-1,1,f(X/874-1.1,Y/500-1.1)))
f=(a,b,n=0)=>a?f(a*a-b*b+.28,S(a*b)*3,n+1):(x.fillStyle=R(n/2,n,n*2),Y)

Dec 16 2023 3:33 PM UTC

}// 139/140

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Fractal Brain, dark blue #fractal

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rodrigo.siqueira

remix of d/25324 by u/rodrigo.siqueira

function u(t) {

f=(x,y,n=9)=>x<4*S(x**2)?f(x*x-y*y-.8,2*x*S(S(y))+.2,n+1):C(n/70)
for(i=2e4;i--;x.fillRect(X=u&2047,u>>11,f(X/4e3+.28,u/8e6-.24),1))u=-~u

Apr 13 2022 5:40 PM UTC

}// 137/140

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The Dark Spiral #fractal #spiral

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rep_movsd

function u(t) {

t||(X=Y=.1)
G=_=>-.38*X+1.38*X*X*Math.exp((1-X*X)/4)
for(I=D=1e3;I--;x.fillRect(D+X*70,540+Y*50,.2,.2))Z=X,X=Y+.01*Y*(1-.1*Y*Y)+G(),Y=G()-Z

Jan 20 2022 8:46 AM UTC

}// 139/140

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Gumowski-Mira attractor

u/rep_movsd

#fractal #attractor #chaos #waitforit

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rodrigo.siqueira

remix of d/20439 by u/rodrigo.siqueira

function u(t) {

for(i=2e3,f=(X,Y,n=120)=>T(X)<9?f(X*X-Y*Y-.8,2*X*Y+.2,n-3):x.fillStyle=`hsl(${i/8},80%,${C(n)*n}%`;i--;x.fillRect(i,t*60,1,1))f(i/3e3,t/50)

Jan 26 2021 1:52 PM UTC

}// 139/140

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Loopy spirals #fractal #julia (same fractal from previous remix, but with new coloring method)

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Pascal

function u(t) {

f=(X,Y,n=80)=>X*X+Y*Y<n?f(X*X-Y*Y-.8,2*X*Y-.2,--n):n/80
for(X=1920;X--;)x.fillRect(1920-X,Y=t*60,a=1-f(X/600-1.6,Y/600-.9)**2,a)

Jan 23 2021 9:03 PM UTC

}// 128/140

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#julia #fractal for c = -0.8 - 0.2i

u/Qwitter

Cool.

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danny@hille.dk

remix of d/19818 by u/rodrigo.siqueira

function u(t) {

f=(X,Y,n=97)=>Y*Y>n?n:f(2*X*Y-.7,Y*Y-X*X,n+9);for(m=i=960;i--;x.fillRect(i*2,1,2,2))x.fillStyle=R(k=f(i/m,(t%45)/30),k/2);x.drawImage(c,0,2)

Oct 23 2020 2:07 PM UTC

}// 140/140

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#julia scroll (repeats after 45 seconds)

u/danny@hille.dk

#fractal

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katkip

function u(t) {

f=(X,Y,s,r)=>{if(s>.3)f(X+s*S(r%2?r:-r),Y+s*C(r%2?r:-r),s/2,r*4)
else x.fillRect(X,Y,1,1)}
for(i=9999;i--;)f(960,540,666,t*i)

Jul 1 2020 11:15 AM UTC

}// 125/140

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#fractal

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