Dweets awesomed by u/AssortedNonsense

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: #Opposites

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taupelink

remix of d/20118 by u/taupelink

function u(t) {

r=Math.random;for(i=k=128;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*9)*15,x.fillStyle=R(h=k*S((p=Y-Y*Y/9)+S(X-X*X/15)%Y*p%1*3),k+h,(k^=i)+h)

Sep 26 2020 8:47 PM UTC

}// 140/140

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d/20121

u/rep_movsd

Eyes of the totem

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Xen

remix of d/20067 by u/anotherkitten

function u(t) {

with(x)for(i=99;--i;fill(arc(S(i/(t%29))*2e3,540+C(t*i)*i*8,i+3,0,t)))beginPath(fillStyle=`hsla(${t*40},50%,${99-i}%,.04)`)

Sep 22 2020 7:52 PM UTC

}// 123/140

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nebulae

u/anotherkitten

niceee
u/smtsjhr

how lovely!

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jylikangas

remix of d/18597 by u/pavel

function u(t) {

for(i=999;i--;x.fillRect(~x.setTransform(s=2e4/i,T(a=i+60*t),9,3*s,1500-i+9*s*C(a),540+8*s*S(a)),0,2,1))x.fillStyle=R(v=99-S(i/99)*80,v,v*2)

May 7 2020 9:44 AM UTC

}// 140/140

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Ice #cavern - all credit to pavel!

u/KilledByAPixel

🧊👍
u/katkip

wow

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pavel

remix of d/18153 by u/Kirjava

function u(t) {

with(x)for(beginPath([X,Y=X,r=200,a=2]=u[T=-~T]||[999]),fillStyle=R(i=4,3e3/r);i--;fill())lineTo(...u[2*T+i]=[X-C(--a)*r,Y+S(a)*r,r*.8,a-9])

Apr 7 2020 3:38 AM UTC

}// 140/140

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#tree #waitforit #uncompressed

u/pavel

This is a breadth-first traversal of a binary tree, one frame at a time. The tree is maintained in a 1D array (2n+i notation) that I simply iterate left-to-right. The loop does double-duty for drawing the current node and inserting the children. The shape has four corners so the loop runs four times and inserts four children: 2n+0, 2n+1, 2n+2, 2n+3. My mind was blown when I realized no extra code was needed to prevent the adding of the extra children because the first two children of the next iteration will overwrite them!
u/joeytwiddle

#broccoli
u/katkip

interesting
u/pavel

https://i.imgur.com/FZ9Whj4.png

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KilledByAPixel

remix of d/16391 by u/KilledByAPixel

function u(t) {

for(i=340;--i;x.fillRect(960+S(m*m)*q,540+C(m*m)*q,50,50))m=i+120*t,q=1e5/i,x.fillStyle=R(i*i/99,i*i/340)

Oct 31 2019 6:28 AM UTC

}// 105/140

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Supernova ☀

u/katkip

i would like to see this on the sky
u/tomxor

wow!
u/yonatan

and so short!
u/lowtolerance

I don’t understand it at all but I love it

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KilledByAPixel

function u(t) {

r=n=>128+128*S((t|0)**n)|0
t?x.rotate(((r(6)>>4)+1)/9.55):x.translate(960,540)
x.fillStyle=R(r(1),r(2),r(3))
x.fillRect(0,r(5)*4,r(7),r(8))

Jul 2 2019 5:18 AM UTC

}// 139/140

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Mandala Generator

u/Xen

love it

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pavel

function u(t) {

c.width|=0;for(let i=4e3,X=Y=Z=w=960;i--;x.fillRect(w+w*X/z,w*Y/z,s=64/z/z,s))a=i**t%5/.64,b=!!a,X=X/2+b*S(a+t),Y=Y/2+b,Z=Z/2+b*C(a+t),z=4+Z

May 2 2019 7:40 PM UTC

}// 140/140

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#sierpinski #pyramid #waitforit #chaosgame

u/pavel

#d3 #perspective
u/Jezza

I really like this!
u/jylikangas

Great! And with performance optimization. :)
u/katkip

UFO :))

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KilledByAPixel

remix of d/13325 by u/KilledByAPixel

function u(t) {

for(i=0;i<2e3;x.fillRect(i?960+i*S(F=260*(t+9)/i+S(i*i)):0,i?500+.2*(2*i*C(F)+2e4/i):0,K=i++?S(i)*9:2e3,K))x.fillStyle=R(99*i,2*i,i,i?1:.4)

Apr 20 2019 7:07 PM UTC

}// 139/140

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#blackhole

Show more comments…
u/DataMeta

Quite cool!
u/katkip

wow
u/aleamb

epic!
u/donbright

#space #astronomy
u/KilledByAPixel

Full explanation on my blog: http://frankforce.com/?p=6378
u/chenliang

cool
u/katkip

top of the year

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username

remix of d/12929 by u/username

function u(t) {

for(c.width|=j=999,t*=.3;j--;x.font=`6em'`)r=t+9*j,x.fillText('.',1e3+r*S(j/10*C(t)),557+r*S(j/10*S(t)))

Mar 29 2019 6:49 PM UTC

}// 104/140

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vinca

function u(t) {

0==t&&(a=b=d=0),c.width|=0,T=0|t,A=3*(a=a-d+12*(T-b))/180,x.moveTo(960,540),x.lineTo(960+540*C(A),540+540*S(A)),x.stroke(),d=T-b>0?6:0,b=T

Mar 21 2019 3:34 AM UTC

}// 138/140

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u/joeytwiddle

Nice flicker :)

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