Dweets awesomed by u/iverjo

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: #Opposites

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KilledByAPixel

remix of d/14751 by u/KilledByAPixel

function u(t) {

with(x)for(i=219;i--;fill())for(beginPath(j=3);j--;arc(960,540,i*9,a=j/.477+S(i/2+t)/2+.52,a))fillStyle=`hsl(${i-t*19} 99%${30+S(i)*30}%`

Jun 25 2019 4:39 PM UTC

}// 137/140

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▲Triangle Twister▼

u/loktar

Love it!
u/magna

Pretty!
u/aleamb

love it!

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KilledByAPixel

function u(t) {

with(x)for(fillRect(0,0,2e3,2e3),i=149;i--;stroke())for(beginPath(j=9);j--;arc(960,540,i*8,a=j*.785+5*S(i/7+t*4)/19,a))strokeStyle=R(i*9,i)

Jun 25 2019 2:19 PM UTC

}// 139/140

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Twisted Spiral

u/Xen

love it!
u/loktar

Oh this is badass
u/aleamb

wow
u/donbright

this looks amazing in full screen

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KilledByAPixel

function u(t) {

with(x)beginPath(save(restore(font="9em'"))),translate(960,540),rotate(-t),moveTo(0,0),clip(arc(0,0,3e3,1.56,1.58)),fillText(u,-t*12*t,t*20)

Jun 24 2019 7:42 PM UTC

}// 140/140

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Spiral #quine #slowdraw

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u/Xen

very clever!
u/jylikangas

And creative!
u/katkip

#genius
u/KilledByAPixel

Thank you, this one came to me in a dream.
u/katkip

#slowrender
u/iverjo

#waitforit
u/KilledByAPixel

Full explanation on my blog: http://frankforce.com/?p=6232
u/magna

This is great!

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rodrigo.siqueira

remix of d/13412 by u/rodrigo.siqueira

function u(t) {

if(t<1)with(x)fillStyle=R(9,20,70),fillRect(0,0,42,99),rotate(Math.PI*.8),translate(-420,-800),drawImage(c,0,0,1e3,1e3),translate(-920,-450)

Jun 23 2019 10:23 PM UTC

}// 140/140

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Blue Starfield - color version

u/donbright

rodrigo you are a legend. if you wrote a book i would buy it

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rodrigo.siqueira

remix of d/12640 by u/rodrigo.siqueira

function u(t) {

if(!t){X=Y=Z=1;for(i=2.3e5;i--;x.fillStyle=R(i/270,i/1e3,Z*2))Z+=(X*Y-Z)/59.1,X+=(Y-X)/11,Y+=X*(28-Z)/99,x.fillRect(960+X*48,1200-Z*24,3,4)}

Jun 23 2019 1:01 AM UTC

}// 140/140

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Lorenz Attractor in color - this will be printed and framed. #lorenz #attractor

u/katkip

you really like #chaos math and attractors
u/taupelink

With good reason, I think :) They are beautiful and, well, strange
u/KilledByAPixel

You should frame the code along with the image ;) Awesome work.
u/rodrigo.siqueira

The prints are ready! Yes, source code is printed with images. https://twitter.com/rsiqueira/status/1143629…

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rodrigo.siqueira

remix of d/14654 by u/rodrigo.siqueira

function u(t) {

if(t<14)for(X=Y=S(t*3)*950,x.fillStyle=R(C(Y)*220,Y/9,S(Y)*Y/4),i=1e4;--i;x.fillRect(960+X+Y,380-Y+X,1,1))X=10+Y+Math.abs(Y=-X)/1.08

Jun 19 2019 7:35 PM UTC

}// 132/140

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The Gingerbreadman map is a discrete-timedynamical system. #gingerbreadman

u/joeytwiddle

Vitruvian man 🤚 Gingerbrad man ☝

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pavel

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼👦👧🐾𚁫𙐱𝠦𙠱𚱫𙐲𚠮𝀱𝀩𚡧𚁡🐮𝰸𝐴𚠨𪰫𜠯𚀱𚰱𩐳𚠪𚁴𙐱𚠴𛑩𚐩𚐩𛁫🐵𝰻𪐽𛐭𪰾🠴𞱸𛡦𪑬𫁒𩑣𭀨𞐶𜀫𝰰𜀪𦀯𮠭𬰬𝐴𜀫𝰰𜀪𦐯𮠭𬰬𬰪🐲𛁳𚐩𦱘𛁙𛁚𧐽𦱘👦𚁃𚐬𪐭𜠬𩠨𤰩𛁘𛁩𛐲𧐮𬱬𪑣𩐨𭀥𜰩𛁺🐳𚱚𛁳🐹𞐯𮠯𮠻`.replace(/u../g,'')))

Jun 19 2019 3:43 AM UTC

}// 139/140

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Rubik's Cube Movement

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u/pavel

191 for(c.width|=f=g=>(k%16&&1+k%2*.414)*g(a=.7854*(k+2/(1+1e3**(t%1*4-i)))),k=57;i=--k>>4;x.fillRect(960+700*X/z-s,540+700*Y/z-s,s*=2,s))[X,Y,Z]=[X=f(C),i-2,f(S),X,i-2].slice(t%3),z=3+Z,s=99/z/z
u/katkip

too good.
u/username

Rubik's Cubes cannot move the middle layer
u/pavel

If you hold the sides the middle moves, no? How could it not!
u/pavel

Here are notation-only moves for(c.width|=f=g=>(k%16&&1+k%2*.414)*g(a=.7854*(k+y*2/(1+1e3**(t%1*4-i)))),k=57;i=--k>>4;x.fillRect(960+700*X/z-s,540+700*Y/z-s,s*=2,s))[X,Y,Z]=[y=i-2,X=f(C),f(S),y,X].slice(t%3),z=3+Z,s=99/z/z
u/username

Technically you are moving both sides at the same time in that case instead of moving the middle layer.
u/katkip

^
u/pavel

That's not what technically means. You have a mental model that only permits sides to move, and you have that model because adding middle rotations would be notationally redundant in that model. This does not mean middle rotations are somehow impossible or that they definitely consists of two side rotations.
u/username

Erm, the middle layer is attached to the core, that is what I mean. It is about the construction of a Rubik's Cube.
u/username

http://www.madehow.com/images/hpm_0000_0007_…
u/pavel

Still seems like this is a matter of perspective. You are chosing a perspective in which the core is always fixed, even though the motion I am describing specifically involves holding the two sides fixed and rotating the core... In my reference frame the core is rotating. So what if the core contains more parts than the side pieces when you take the cube apart?
u/13thptr

that escalated quickly
u/donbright

maybe they dont actually move like this... but they should!

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rodrigo.siqueira

remix of d/14641 by u/rodrigo.siqueira

function u(t) {

X=Y=t*400
for(i=3e4;--i;x.fillRect(800+X,350+Y,1,1))X=80-Y+Math.abs(Y=X/1.0001)

Jun 18 2019 9:14 PM UTC

}// 79/140

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Gingerbreadman, golfed and clean code. I just added "/1.0001" to get some spirals. #gingerbreadman

u/katkip

this one is super cool but i got bored of this man
u/joeytwiddle

Shuriken

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rodrigo.siqueira

remix of d/14642 by u/rodrigo.siqueira

function u(t) {

A=Z=a=b=t-3;s=180
for(i=1e4;--i;)x.fillStyle=R(a*55,b*20,S(b-a)*99),x.fillRect(850+a*s,350+b*s,.7,.8),
a=1-b+Math.abs(a-S(a+2))/2,
b=A,A=a

Jun 17 2019 3:04 PM UTC

}// 138/140

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Patterns from the Gingerbread Man #attractor

u/Xen

sexy!
u/katkip

Nice #chaos
u/rodrigo.siqueira

#gingerbreadman
u/iverjo

Fascinating!
u/Qwitter

Wow, islands, everywhere

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rodrigo.siqueira

remix of d/14639 by u/rodrigo.siqueira

function u(t) {

if(t<2){A=Z=a=b=-.1+t/15;s=90
for(i=1e4;--i;)x.fillStyle=R(a*50,b*30,S(b)*s),x.fillRect(800+a*s,310+b*s,.7,.6),
a=1-b+Math.abs(a),
b=A,A=a}

Jun 17 2019 1:59 PM UTC

}// 139/140

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The Gingerbread Man #attractor from dynamical systems theory. "The Gingerbreadman Map is chaotic in the filled region and stable in the six hexagonal regions."

u/katkip

#chaos
u/rodrigo.siqueira

"Even the simplest mathe-matical expressions, when interpreted as dynamical systems, yield fractals." (Robert L. Devaney) #gingerbreadman

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