Dweets by u/taupelink

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: #Food

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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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taupelink

function u(t) {

w=1920;h=1080;for(i=99;i--;){X=(r=Math.random)()*w,Y=r()*h
x.fillStyle=`hsl(${X/6-99*t%360},90%,${Y/12}%,.1)`
x.fillRect(X,h-Y,s=r()*99,s)}

Jun 15 2019 6:11 PM UTC

}// 139/140

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hsl color rotation with random rectangles

u/joeytwiddle

Stains: w=1920;h=1080;r=Math.random;for(i=99;i--;)X=r()*w,Y=r()*h,x.fillStyle=hsl(${X/6+999*t},90%,${Y/21+20}%,.013),x.fillRect(X,h-Y,s=r()*300,s)

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taupelink

function u(t) {

x.strokeStyle=`hsl(${(r=Math.random)()*360},90%,50%,.1)`
x.lineWidth=3
x.strokeRect(r()*1920,r()*1080,s=r()*300,s)

Jun 14 2019 10:18 PM UTC

}// 114/140

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Just a bunch of rectangles

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taupelink

function u(t) {

x.fillRect(0,0,w=2e3,w);f=A=>x.clearRect(...A);f([0,0,w,400]);for(i=52;i--;){f([i*50-300+S(t)*300,i+1&1&&i<31&&i>13?600:400,50,680])}

Jun 13 2019 4:00 AM UTC

}// 133/140

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all negative space #default

u/taupelink

If you're seeing artifacts, you can insert "|0" to the right of S(t)*300

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taupelink

function u(t) {

f=(a,b,n)=>b?(a>=b?
(x.fillStyle=R(25*n),
x.fillRect(X,Y,b,b),X+=d?0:b,Y+=d?b:0,f(a-b,b,n+1))
:(d=!d,f(b,a,n+1))
):0
d=X=Y=0;f(1920,1080,0)

Jun 13 2019 1:58 AM UTC

}// 139/140

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GCD(1920,1080)=120, the size of the smallest reddest square. Demonstration of Euclidean algorithm by subtraction, cf. https://en.wikipedia.org/wiki/Euclidean_algo… #math

u/taupelink

#recursive #recursion
u/taupelink

(120 is the side length, not the size)
u/donbright

#numbertheory
u/donbright

this is super interesting

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taupelink

remix of d/14533 by u/rodrigo.siqueira

function u(t) {

m=1e3;n=100;R=Math.random()*3;X=R*C(v=t*n);Y=R*S(v);Q=R*R*S(3/R);x.moveTo(A=960+m*X,B=540+m*Y);x.lineTo(A+(-Y+X*Q)*n,B+(X+Y*Q)*n);x.stroke()

Jun 12 2019 9:29 PM UTC

}// 140/140

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Slow-building remix with polar coordinates and random r #math

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taupelink

function u(t) {

C=100
c.width|=0
for(i=9;i--;)x.fill(new Path2D(`M${C*(4+i+3*S(t))} 400 h50 v${2*C} h-50 v${-2*C}`))

Jun 9 2019 9:57 PM UTC

}// 101/140

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#default with #path2D

u/katkip

nice
u/taupelink

Notes: The v${-2*C} at the end can be omitted. I regret my choice of "C" for a variable name--that's cosine :)

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taupelink

remix of d/11655 by u/Undefined

function u(t) {

l=(n,a)=>(a.push(n),n-1?l(n%2?n*3+1:n/2,a):a)
c.width|=0,k=0,b=l(~~t+2,[]),m=(Math.max(...b)/99)|1
b.forEach(X=>x.fillRect(k++*20,0,20,X/m))

Jun 7 2019 2:21 AM UTC

}// 140/140

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Mini #collatz, adapted for column graphs #math

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taupelink

remix of d/14386 by u/katkip

function u(t) {

c.width*=1
t||(a="Sort by new".split(""),i=m=0)
a[++i]>(q=a[m])||(a[m]=a[i],a[i]=q)
i%11||(i=++m)
x.font='9cm"';x.fillText(a.join(""),0,560)

Jun 4 2019 10:44 PM UTC

}// 140/140

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Amplifying the signal. I like "Sort by new" too! #sort

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taupelink

remix of d/14398 by u/taupelink

function u(t) {

t?(a=f(n++),N<1e15?(c=N/D,[N,M,D,E]=[a*N+M,N,a*D+E,D]):0):(c=n=M=D=0,N=E=1,f=X=>[1,2*X/3|0,1][X%3])
throw N+' / '+D+' = '+c

Jun 3 2019 12:49 AM UTC

}// 123/140

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Remix with numerator / denominator

u/taupelink

#math

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