Dweets awesomed by u/aleamb

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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KilledByAPixel

remix of d/14750 by u/KilledByAPixel

function u(t) {

c.width|=0
with(x)for(i=182;i--;stroke())for(beginPath(lineWidth=j=7);j--;arc(960,540,i*7,a=j/.95+5*S(i/5+t*2)/29,a))strokeStyle=R(0,i/3,i)

Jun 25 2019 2:20 PM UTC

}// 139/140

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Twisted Spiral 2

u/katkip

nice
u/Xen

wow

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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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loktar

function u(t) {

eval(unescape(escape`𩡯𬠨𢐽𜡥𜰬𢠽𜐰𞀰𛁸𛡤𬡡𭱉𫑡𩱥𚁣𛀰𛀰𛁉𛁊𛀰𛀭𜐬𢐬𢠩𛁌🐡𭀦𙡛𜁝𯁼𣀬𥰽𭀬𪐽𜀻𪐼𢐻𪐫𚰩𣁛𪑝👴🱌𦱩𧐺𤰨𥰫🐮𜐩𛁸𛡦𪑬𫁓𭁹𫁥👠𪁳𫀨𜐹𜀬𞐰𙐬𙁻𞐰𚡌𦱩𧑽𙐩𨀬𮀮𩡩𫁬𤡥𨱴𚁩𚰱𜀪𤰨𜐰𚡴𚐬𢠬𜐬𛑌𦱩𧐩𞱌𛡰𭑳𪀨𣀮𬱨𪑦𭀨𚐩`.replace(/uD./g,'')))

Jun 25 2019 4:33 AM UTC

}// 138/140

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Scrolling waves, original https://codepen.io/loktar00/pen/pJRbOd wish I could have fit color cycling in

u/donbright

kawaii

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taupelink

remix of d/14682 by u/rodrigo.siqueira

function u(t) {

s=t%1*9;c.width=480;for(n=20*s|0+9;n--;){X=n/s;Y=99*S(n)/s;for(i=200;--i;){X=57+Y-Math.abs(Y=-X)/2;x.fillRect(242+(X+Y)*s,112+(X-Y)*s,1,2)}}

Jun 25 2019 2:12 AM UTC

}// 140/140

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Loop with zoom, in lower resolution, adding detail as it zooms in. Warning, it's CPU-intensive, also kinda creepy looking O_O

u/taupelink

67, not 57, to be more faithful to rodrigo's parameters
u/taupelink

ignore that last comment...57 is about right

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loktar

function u(t) {

for(S=10,D=750,x.scale(3,3),i=0;i<D*D;i+=S)!t&&x.fillText(~~(2*Math.random())?"╱":"╲",i%D,~~(i/D)*S);

Jun 25 2019 12:54 AM UTC

}// 101/140

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#c64 10 PRINT CHR$(205.5+RND(1)); : GOTO 10

Show more comments…
u/loktar

Always a bit longer in JS than on the Commodore.
u/loktar

If not for having to scale to make it viewable it can actually be smaller, removing scale and doing 2e3, vs 750 produces a nice result fullscreen.
u/loktar

#maze wow, some amazing implementations I'm glad I didn't check prior lol.
u/andrea270872

I learned programming with a C64! Ah, the nostalgia :)
u/loktar

@andrea270872 same here actually, although I've accumulated many more Commodores and various models since then haha
u/joeytwiddle

I just learned about that book today, through a different channel
u/joeytwiddle

C64 lovers might like this: http://www.oneliner64.com/

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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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New_Core

function u(t) {

for(i=500;i--;x.fillRect(960+400*S(i)*Z,540+i*C(i)*Z,a=i/2*Z,a))Z=2**T(i*8+t),x.fillStyle=`hsla(${i/2+t*5},99%,50%,.02)`

Jun 24 2019 8:36 AM UTC

}// 121/140

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u/katkip

hyperspace tunnel
u/donbright

my goodness this is rather profound
u/joeytwiddle

#tunnel #clouds

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KilledByAPixel

remix of d/14717 by u/rodrigo.siqueira

function u(t) {

c.width|=X=Y=Z=1
for(i=4010;i--;i<2e3&&x.lineTo(960+(X*C(t)-Y*S(t))*45,1160-Z*23))Z+=(X*Y-Z)/39,X+=(Y-X)/13,Y+=X*(28-Z)/99
x.fill('evenodd')

Jun 23 2019 6:49 PM UTC

}// 140/140

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3D Lorenz Attractor

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veubeke

function u(t) {

V=t?[Math.random()*48|0,...V.slice(0,c.width=480)]:[]
for(i=48;i--;x.fillRect(i*10,260,9,-S*9))S=0,V.map(v=>S+=v==i),x.fillStyle=R(99+S*9)

Jun 19 2019 8:30 PM UTC

}// 138/140

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Random number distribution

u/username

seems flawed
u/veubeke

Because it’s showing the last 480 numbers. If you accumulate more data it eventually evens out.
u/joeytwiddle

#random numbers are more likely to coincide than fall evenly. Coincidences are almost guaranteed! https://en.wikipedia.org/wiki/Birthday_probl…

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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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