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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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rodrigo.siqueira

remix of d/11965 by u/pavel

function u(t) {

for(x.fillRect(0,0,i=3e3,i);Q=S(--i*i);x.clearRect(960+150*(S(b)*4+S(i+t)*Q),540+150*(C(i*i)-(t%4>2?T(b+t):S(b+t))),4,4))b=i%6+t+(t%2>1?0:i)

Jan 28 2019 2:40 PM UTC

}// 140/140

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Torus, spheres, flow and bubbles

Show more comments…
u/rnbw

now THIS is a demo!
u/katkip

Yeah he win
u/13thptr

woah
u/joeytwiddle

Superb! Golf the end with i*(t%2>1) or i*!(t&1)
u/rodrigo.siqueira

Thanks @joeytwiddle for the golf trick. i*(t&1) also works and it's even shorter. And I found that t%4>2?... can be converted to t&2?... It works as a counter to change the function each 2 seconds.
u/yonatan

Also, since T and S take the same arguments (t%4>2?T(b+t):S(b+t)) can be (t&2?T:S)(b+t)
u/lionleaf

Wow! Now we're talking
u/vain

Wow, three fx in this tiny code? Great!

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katkip

remix of d/11979 by u/katkip

function u(t) {

c.width*=1;for(i=900;i--;)k=i*2+t,l=250-S(i+S(C(i))*C(k*(3+t/2|0)))*250,x.fillRect(960+C(k)*l,540+S(k)*l,10,10)

Jan 28 2019 1:06 PM UTC

}// 111/140

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Void organic thing inside another thing. It gets powerful every 2 seconds

u/joeytwiddle

Curious. Also #smokedweeteveryday

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katkip

remix of d/11978 by u/katkip

function u(t) {

c.width*=1;for(i=900;i--;)k=S(t+i)*t-i,l=500-C(i+C(i*t/9999)/9)*500,x.fillRect(960+C(k)*l,540+S(k)*l,10,10)

Jan 28 2019 12:53 PM UTC

}// 107/140

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Weird hypocycloids

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katkip

remix of d/11977 by u/katkip

function u(t) {

c.width*=1;for(i=900;i--;)k=S(t+i)*t,l=500-C(k-i)*500,x.fillRect(960+C(k)*l,540+S(k)*l,10,10)

Jan 28 2019 12:50 PM UTC

}// 93/140

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White hole. I rarely wash myself because I'm lazy :(

u/katkip

Haha you guys liked this dweet only to be the first comment more visible lmao?

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katkip

function u(t) {

k=S(t)*t;l=C(k)/6;x.fillRect(960+C(k-l)*400,540+S(k+l)*500,10,10)

Jan 28 2019 12:46 PM UTC

}// 65/140

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stellartux

remix of d/11975 by u/stellartux

function u(t) {

c.width=w=1920;x.scale(.5,.3);for(i=v=88.11;i<w;i+=v)for(j=v;j<w;j+=v){x.fillStyle=`#${i*839+j}`;x.fillRect(w+C(q=i+t)*j,w+T(q)*i,v,v+S(t))}

Jan 28 2019 3:41 AM UTC

}// 140/140

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stellartux

function u(t) {

c.width=w=1920;x.scale(.5,.3);for(i=v=91.01;i<w;i+=v)for(j=v;j<w;j+=v){x.fillStyle=`#${i*839+j}`;x.fillRect(w+C(q=j+t)*j,w+T(q)*i,v,v+S(t))}

Jan 28 2019 3:39 AM UTC

}// 140/140

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There's some interesting variations on this one by changing v slightly or setting v near 88.11. q=i+t has some interesting patterns too. I like the #purple one.

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f8f82804

remix of d/11962 by u/f8f82804

function u(t) {

c.width=32;d=new Date/1e3%86400;j=120;do{"縿Ϡ庽纵粇皷皿簡线粧碾⪿䘮㨿嚿ᒿ".charCodeAt(d&15)&1<<--j%20&&x.fillRect(2+j/5|0,j%5+7,1,1)}while(j%20|0||(d>>=4))

Jan 27 2019 11:04 PM UTC

}// 140/140

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#hex #clock -- shows count of seconds since #UTC midnight (ignoring leap second corrections since epoch)

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katkip

function u(t) {

t||(j=0);for(i=100;i--;)x.fillStyle=`hsl(${(50-i)**3+j**3} 99%${50+S((50-i)**2+j**2)*j/2}%)`,x.fillRect(j*10,10*i,10,10);j++

Jan 27 2019 8:37 PM UTC

}// 124/140

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From color to grayscale

u/katkip

#abstract #art

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Koi

function u(t) {

24ad6e39162ae5020ac533164f42411c

Jan 27 2019 5:48 PM UTC

}// 32/140

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Time is a picture in motion

u/katkip

you just shared a hash of Time is a picture in motion
u/katkip

?
u/joeytwiddle

No result found on https://md5hashing.net/hash or https://isc.sans.edu/tools/reversehash.html #puzzle
u/Koi

https://md5hashing.net/hash