Hot 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/15085 by u/taupelink

function u(t) {

t||(A=[e=512,e+1],r=i=n=2);i--?(z=A[i],N=z%e,D=z>>9,x.fillText(N+'/'+D,N/D*1900,D*9),n-i-1&&A.splice(i+1,0,w+z),w=z):(i=n+=n-1)

Jul 22 2019 12:55 AM UTC

}// 127/140

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Farey sequence #math #numbertheory

u/donbright

awesome
u/IV

called Farey because wings? :)

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taupelink

function u(t) {

t||(A=[e=1<<9,e+1],r=i=n=2,q=s="");i--?(z=A[i],s=`${z%e}/${z>>9} `+s,n-i-1&&A.splice(i+1,0,w+z),w=z):r++<12&&(q=s,i=n+=n-1,s="")
throw q

Jul 22 2019 12:30 AM UTC

}// 136/140

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Farey sequence of rational numbers. #math #numbertheory https://en.wikipedia.org/wiki/Farey_sequence

u/taupelink

a/b+c/d is NOT equal to (a+b)/(c+d), but the latter quantity is known as the "mediant" and is of interest. https://en.wikipedia.org/wiki/Mediant_(mathe…
u/taupelink

See also https://www.dwitter.net/d/14451 by u/KilledByAPixel
u/KilledByAPixel

👍
u/donbright

I did a Ford's Circles dweet a while back, https://www.dwitter.net/d/1951 ... love this stuff

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taupelink

remix of d/14655 by u/taupelink

function u(t) {

t||(a=[],s=r=k=0,c.width=500)
a[s+k]=k%r?a[s-r+k-1]+a[s-r+k]:1
r<16&&x.fillText(a[s+k],250-15*r+30*k,15*r+15)
++k>r&&(s+=++r,k=0)

Jul 21 2019 1:19 AM UTC

}// 129/140

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Golfed with 1-dimensional array

u/donbright

woah
u/donbright

thats awesome

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taupelink

remix of d/15042 by u/taupelink

function u(t) {

r={valueOf:Math.random};h=256
x.globalCompositeOperation='xor';x.fillStyle=R(r*h,r*h,r*h)
x.fillRect(r*1920,r*1080,r*h,r*h)

Jul 19 2019 9:44 PM UTC

}// 123/140

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#xor

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taupelink

remix of d/15074 by u/taupelink

function u(t) {

t||(A=[0,0,0],B=[0,0,0],h=c.width=256);for(j=99;j--;)x.strokeStyle=R(...A),x.strokeRect(...B,h),A=A.map(f=n=>(n+Math.random())%h),B=B.map(f)

Jul 21 2019 7:52 PM UTC

}// 140/140

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rectangle borders instead of alpha'd solid rectangles

u/taupelink

#waitforit because it can be slow to fill the screen and show different colors :)

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taupelink

remix of d/15043 by u/taupelink

function u(t) {

t||(A=[0,0,0],B=[0,0,0,0],h=c.width=256);for(j=99;j--;)x.fillStyle=R(...A,.01),x.fillRect(...B),A=A.map(f=n=>(n+Math.random())%h),B=B.map(f)

Jul 21 2019 7:43 PM UTC

}// 140/140

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flickering rectangular slide show

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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/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

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/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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