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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katkip

function u(t) {

f=(a,b,c)=>{if(c>3)x.fillRect(a,b,c,c),f(a+c,b+c,c/2,c/2),f(a-c/2,b+c,c/2,c/2),f(a-c/2,b-c/2,c/2,c/2),f(a+c,b-c/2,c/2,c/2)};f(635,215,650)

Dec 30 2018 9:53 AM UTC

}// 138/140

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#recursion #recursive microprocessor #fractal

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katkip

remix of d/11582 by u/katkip

function u(t) {

eval(unescape(escape`挮睩摴桞㴰㭺㴨堬夬猩㴾筩昨猾㄰⥸⹦楬汒散琨堪猬夬猪㐬猩ⱸ⹦楬汒散琨堬太猬猬猪㔩ⱺ⡘⵳⨲ⱙⱳ⼱⸷⤬稨堬夭猪㈬猯ㄮ㜩ⱺ⡘ⱙ⭳ⱳ⼱⸷⤬稨堫猪㈬夬猯ㄮ㜩紬稨㤶〬㔴〬㈸〫䌨琪㈩⨲〩`.replace(/u(..)/g,"$1%")))

Dec 30 2018 9:44 AM UTC

}// 133/140

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#default in traffic #recursion

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katkip

function u(t) {

c.width*=1;f=(X,s)=>{if(s>3)x.fillRect(960+S(X)*s,540+C(X)*s,9,9),f(X-0.02*C(t+X*5),s-2)}
f(520+t,500)

Feb 5 2019 8:29 AM UTC

}// 102/140

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Electrical lighting trajectory simulation #recursive #recursion

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katkip

function u(t) {

eval(unescape(escape`挮睩摴桞㴰㭣牯獳㴨堬夬猩㴾筩昨猾㄰⥸⹦楬汒散琨堭猬夬猪㈬猯㄰⤬砮晩汬剥捴⡘ⱙ⵳ⱳ⼱〬猪㈩Ᵽ牯獳⡘⵳ⱙⱳ⼲⤬捲潳猨堬夭猬猯㈩Ᵽ牯獳⡘ⱙ⭳ⱳ⼲⤬捲潳猨堫猬夬猯㈩紻捲潳猨㤶〬㔴〬㈸〫䌨琩⨹㤩`.replace(/u(..)/g,"$1%")))

Dec 30 2018 9:30 AM UTC

}// 140/140

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Quadric Cross #fractal #recursion

u/katkip

c.width^=0;cross=(X,Y,s)=>{if(s>10)x.fillRect(X-s,Y,s*2,s/10),x.fillRect(X,Y-s,s/10,s*2),cross(X-s,Y,s/2),cross(X,Y-s,s/2),cross(X,Y+s,s/2),cross(X+s,Y,s/2)};cross(960,540,280+C(t)*99)
u/katkip

It could be golfed more but, eh, I would still need compression

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katkip

remix of d/11861 by u/katkip

function u(t) {

id=1337
t||x.fillRect(0,0,2e3,2e3);f=n=>{if(n<800)x.clearRect(960+C(n)*n,540+S(n)*n,5,5),f(n*C(id)+n*2)};f(t*t/id)

Jan 17 2019 1:29 PM UTC

}// 114/140

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Replace id with a number and create your own seeded galaxy #recursive #recursion #interactive

u/katkip

Cool one: id=Math.asin(t*t)/100
u/katkip

Big bang: id=Math.PI-t/10

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katkip

function u(t) {

f=n=>{if(n<800)x.fillRect(960+C(n)*n,540+S(n)*n,5,5),f(n*2)}
f(t)

Jan 17 2019 1:24 PM UTC

}// 65/140

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#recursive #recursion

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katkip

function u(t) {

r=(X,Y,s)=>{if(s>1)x.beginPath(),x.arc(X,Y,s*2,0,7),x.stroke(),r(X-s,Y,s/2),r(X+s,Y,s/2)}
r(960,540,480)

Dec 31 2018 11:56 AM UTC

}// 104/140

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#recursive circles #recursion #circle #arc #fractal

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