Top #recursion dweets

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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geb

function u(t) {

f=(X,Y,r,d)=>{if(d>9)x.fillRect(X,Y,9,9),f(X+=C(r)*d,Y+=S(r)*d,t/2+r,d*.95)}
for(c.width|=r=0;r<5;r++){f(960,540,r*446/71/5,550)}

Jun 28 2020 1:16 PM UTC

}// 130/140

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here comes the sun #recursion

u/katkip

O_O

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katkip

function u(t) {

f=(X,Y,s)=>{if(s>6)x.fillStyle=R(C(t+s)*256),x.fillRect(X-s/2,Y,s,s),f(X-s,Y,s/2),f(X,Y-s*t,s/2),f(X+s,Y,s/2),f(X,Y+s/t,s/2)};f(960,540,750)

Jan 19 2019 5:53 PM UTC

}// 140/140

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Hell #satan. #red #recursive #recursion. I still love god and hate satan

u/metamero

i loved this

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taupelink

function u(t) {

t||(a=[[]],r=k=0);x.font=`3em"`
a[r][k]=k%r?a[r-1][k-1]+a[r-1][k]:1
r<16&&x.fillText(a[r][k],960-60*r+120*k,60*r+60)
++k>r&&(a[++r]=[],k=0)

Jun 18 2019 1:17 AM UTC

}// 139/140

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Pascal's Triangle #math #recursive #recursion

u/katkip

Awesome!
u/donbright

#numbertheory

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katkip

function u(t) {

eval(unescape(escape`挮睩摴桞㴰㭴⼽㈻昽⡘ⱙⱳ⤽㹻砮扥杩湐慴栨⤻楦⡳㸲〩砮慲挨堬夬猬〬㜩ⱸ⹳瑲潫攨⤬昨堫䌨猫琩⩳ⱙⱳ⼲⤬昨堭䌨猫琩⩳ⱙⱳ⼲⤬昨堬夫䌨猫琩⩳ⱳ⼲⤬昨堬夭䌨猫琩⩳ⱳ⼲⥽㭦⠹㘰ⰵ㐰ⰷ〰⤻`.replace(/u(..)/g,"$1%")))

Dec 30 2018 10:15 AM UTC

}// 135/140

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#circles #fractal #recursion #recursive I'm just like a gifted autistic kid who finally discovered recursion c.width^=0;t/=2;f=(X,Y,s)=>{x.beginPath();if(s>20)x.arc(X,Y,s,0,7),x.stroke(),f(X+C(s+t)*s,Y,s/2),f(X-C(s+t)*s,Y,s/2),f(X,Y+C(s+t)*s,s/2),f(X,Y-C(s+t)*s,s/2)};f(960,540,700)

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taupelink

function u(t) {

c.width|=0;f=X=>{for(i=2;i*i<=X;i++)if(X%i==0)return i+'*'+f(X/i);return X};k=frame/6|0;x.font='5em"';x.fillText(k+'='+f(k),0,540)

Jun 28 2019 1:01 AM UTC

}// 130/140

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factorization into #prime products. #math

u/taupelink

simple #recursion #recursive
u/Xen

very clever
u/katkip

wow
u/donbright

#numbertheory

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jonathan-potter

function u(t) {

c.width=960
f=(o,l,X=480,Y=270)=>{if(l>1){
x.fillRect(X,Y,2,2)
f(o+t*.1,l*.6,X+=l*C(o),Y+=l*S(o))
f(o-t,l*.75,X,Y)}}
f(t,99)
f(t+3,60)

Nov 12 2018 10:57 PM UTC

}// 134/140

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felt like doing some #selfsimilarity #recursion

u/katkip

cute #fractal

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katkip

function u(t) {

f=(X,Y,S)=>{if(S>10)x.beginPath(),x.arc(X,Y,S,3.2,6.2),x.stroke(),f(X+S,Y+S/2,S/2),f(X-S,Y+S/2,S/2)}
x.lineWidth=9;f(960,540,450)

Feb 5 2019 8:04 AM UTC

}// 129/140

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#recursive #recursion

u/cantelope

awesome!
u/katkip

thx

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katkip

remix of d/17018 by u/katkip

function u(t) {

f=(a,b)=>S(b)+C(a)<0?f(-a-b,-b+a):S(a+b)<0
for(i=19999;i--;){a=(r=Math.random)()*1920,b=r()*1080;if(f(a/299+1,b/299-3))x.fillRect(a,b,3,3)}

Dec 30 2019 7:49 PM UTC

}// 139/140

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#fractal #recursion #abstract

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katkip

function u(t) {

z=(a,b)=>C(a*a+b)<0?S(a*b/5):z(1.5*b-a,.4-a);t||(w=0);for(v=9;v--;++w)for(i=1080;i--;)x.fillStyle=R(z(i/990,w/999)*500),x.fillRect(w,i,1,1)

Dec 29 2019 3:49 PM UTC

}// 139/140

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I would like to understand how this works. I made just a random recursive formula and the result is too beautiful! #recursion is awesome

u/katkip

#slow #scanline #fractal
u/poetaster

a rose by any other name is still a rose by any other name is

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katkip

function u(t) {

t||(q=0);f=(X,Y,s,A)=>{if(s>0.001)f(X+S(A)*s,N=Y+C(A)*s,s/2,A*4);else x.fillRect(X,Y,1,1)};for(i=399;i--;)f(960,540,270,q+=4/1e5)

Dec 13 2019 6:19 PM UTC

}// 129/140

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a very beautiful #fractal #spirograph #curve #recursion #recursive

u/katkip

benice's equation

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