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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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taupelink

remix of d/14603 by u/taupelink

function u(t) {

r={valueOf:Math.random}
x.globalCompositeOperation=['xor','xor','lighten','darken'][r*4|0]
x.fillRect(r*1920,r*1080,r*200,r*200)

Jul 19 2019 9:41 PM UTC

}// 128/140

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#xor

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taupelink

function u(t) {

f=X=>{throw X};v=t|0
v?(s+=v+" ",v-1?u(v%2?3*v+1:v/2):(r=s,s="",f(r))):(s="",u(1))

Jul 19 2019 5:07 AM UTC

}// 82/140

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#collatz #recursive #recursion using u(t)

u/NumbersTada

3x+1

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taupelink

remix of d/14990 by u/taupelink

function u(t) {

t||x.translate(960,b=540,A=[b,d=e=0,-b,0,b,0]);for(i=b;i--;)l=.5+S(i)/10,d+=(A[r=Math.random()*4|0]-d)*l,e+=(A[r+1]-e)*l,x.fillRect(d,e,1,1)

Jul 14 2019 1:25 PM UTC

}// 140/140

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Remix with four points

u/taupelink

some pattern details are just an artifact of the "S(i)" (sine of i radians) in the golfed code
u/donbright

nice

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taupelink

remix of d/14810 by u/Fime

function u(t) {

t||x.translate(960,b=540,A=[d=e=0,-b,b,b]);for(i=b;i--;)l=.5+S(i*b)/10,d+=(A[r=Math.random()*3|0]-d)*l,e+=(A[r+1]-e)*l,x.fillRect(d*2,e,1,1)

Jul 14 2019 4:41 AM UTC

}// 140/140

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Variant where the distance scale factor is 1/2 plus-or-minus a little bit. Also some code golfing

u/taupelink

I think some of the pattern details are an artifact of the way I golfed the code...of whatever the values of sin(i*540 radians) are, for integers i=0,...,539
u/Xen

sexy

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taupelink

remix of d/14925 by u/taupelink

function u(t) {

t||(a=[]);c.width=160
for(i=a.length;i--;)x.fillText(a[i],i%8*20,8+i|7)
r=Math.random()*64|0;a.lastIndexOf(r)+1||a.push(r)

Jul 11 2019 4:06 PM UTC

}// 122/140

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An alternative #shuffle. Takes a little longer to find those last values. H/t to u/joeytwiddle for a golf tip using binary arithmetic

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taupelink

function u(t) {

j=t?j+!(frame%30):0;for(i=32;i--;)x.fillStyle=`hsl(${99*i%360},99%,${(i%8+2*(i>>3)+t%7|0)&j?5:50}%)`,x.fillRect(i%8*240,(i>>3)*270,235,266)

Jul 7 2019 1:50 AM UTC

}// 139/140

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Colored squares, just modular arithmetic

u/donbright

mona lisa was just paint

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taupelink

remix of d/14855 by u/taupelink

function u(t) {

c.width=500;p=37;a=(t|0)%(p-1)+1;for(n=0,m=a;++n<=p;m*=a,m%=p)x.fillStyle=R((n-1)%(p-1)?0:255,0,(n-p+1)?0:255),x.fillText(n,12+m*12,7+n*7)

Jul 6 2019 6:29 PM UTC

}// 138/140

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Powers of a=1, 2, 3, ..., 36 modulo 37, arranged in rows. The 36th power is always 1; the 37th is a.

u/taupelink

#math #numbertheory Fermat's little theorem https://en.wikipedia.org/wiki/Fermat's_l…
u/DataMeta

Cool!

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taupelink

remix of d/14619 by u/taupelink

function u(t) {

for(i=w=2e3;i--;){X=(r=Math.random)()*w,Y=i*i/w/4
x.strokeStyle=`hsl(${X/40-60*C(t/3)+240},90%,${Y/8}%)`
x.strokeRect(X,w/2-2*Y,s=r()*99,4)}

Jul 6 2019 2:48 AM UTC

}// 140/140

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color oscillation thing

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taupelink

function u(t) {

t||(a=[J=64]);c.width=160
for(i=64;i--;)t||(a[i]=i),x.fillText(a[i],i%8*20,9+(i>>3)*9)
J&&(K=Math.random()*(J--)|0,[a[K],a[J]]=[a[J],a[K]])

Jul 5 2019 3:29 AM UTC

}// 139/140

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Fisher-Yates shuffle aka Knuth shuffle. #math https://en.wikipedia.org/wiki/Fisher%E2%80%9…

u/taupelink

I'd be curious to see how much space can be saved by golfing on this one!
u/Xen

killed 8bytes for you
u/taupelink

#shuffle

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taupelink

function u(t) {

t||(c.width=162,r=X=4567,s=Y=89,h=l=n=1,i=k=0)
r&&x.fillText(h+`x${X}+(${k})x${Y}=`+r,0,n++*9),q=r/s|0,[h,k,r,i,l,s]=[i,l,s,h-q*i,k-q*l,r%s]

Jul 1 2019 4:45 AM UTC

}// 140/140

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Extended Euclidean algorithm, to find h, k such that hX+kY=gcd(X,Y) #math #numbertheory

u/durian-favored-monster

i remember this in high school it was very cool! good job! this is the best text one i've seen
u/geb

EEA is so cool!

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