Top #recursive 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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ciaccodavide

remix of d/21560 by u/ciaccodavide

function u(t) {

c.width|=1
f=(X,Y,s)=>(h=s/2,x.fillRect(X-h,Y-h,s,s),s>3&&(f(X-s*S(t),Y-s,h,f(X+s,Y+s,h,f(X+s,Y-s,h,f(X-s,Y+s,h))))))
f(960,540,199+S(t)*99)

Feb 2 2021 1:54 PM UTC

}// 140/140

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#recursive squares to #sierpinski

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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) {

f=(a,b,c)=>{if(c>10)x.lineTo(a-c/2+S(a*a+t+c)*300,b-c/2+C(b*b+t+c)*300),x.stroke(),f(a-c*C(b),b-c*S(a),c/3)}
f(1260,540,900),x.lineWidth=.2

Jan 17 2019 1:18 PM UTC

}// 139/140

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#recursive

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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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katkip

function u(t) {

c.width^=0
f=(X,Y,d,a=C(d)*d,b=d/2)=>{if(d>20)x.strokeRect(X-b,Y-b,d,d),f(X+a,Y,b),f(X,Y+a,b),f(X-a,Y,b),f(X,Y-a,b)};f(960,540,700-t)

Dec 30 2018 1:06 PM UTC

}// 133/140

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#recursive squares. Thanks to u/BirdsTweetCodersDweet for golfing

u/katkip

It's better on fullscreen, there are different patterns

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