Dweets awesomed by u/electric-skeptic

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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metamero

function u(t) {

</script>

Jul 1 2019 3:37 PM UTC

}// 9/140

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u/Xen

crafty
u/durian-favored-monster

very cheeky :)
u/katkip

#xss

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Xen

remix of d/14840 by u/pavel

function u(t) {

for(c.width=1e3,r=262,k=98;k--;)for(r*=k%2||C(d),n=j=t+k%6?8+k>>1:2;j--;x.arc(480+C(2*t+k),270,r,a=2*d*j+t/4,a))d=22/7/(n-1)
x.fill`evenodd`

Jun 30 2019 10:22 PM UTC

}// 140/140

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shimmer v.s.

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magna

function u(t) {

r=_=>Math.random()*10|0;eval('for(c.width|=i=9;i--;)x.fillRect(400+i*100+S(t)*300,400,50,200)'.replace(r(),r()))

Jun 27 2019 10:18 PM UTC

}// 112/140

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#default #glitch

u/donbright

cool idea
u/DataMeta

neat

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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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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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Xen

remix of d/1359 by u/sigveseb

function u(t) {

x.beginPath(Z=c.width=512);x.translate(256,128);(a=b=>{b&&a(b-1);x.rotate(1+S(t/99));x.lineTo(C((t-b)%1)*b/t,S(t%1)*b)})(Z*2);x.stroke()

Jun 20 2019 7:05 PM UTC

}// 136/140

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massive shoutz to sigveseb!

u/Xen

#trippy #spiral

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katkip

function u(t) {

c.style.background="#205";x.beginPath(x.strokeStyle='#fff1');for(i=9;i--;)x.lineTo(960+C(-(q=i*i*t)%3+5)*360,540+S(-q%3+5)*360);x.stroke()

Jun 20 2019 2:19 PM UTC

}// 138/140

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#moon #realistic A realistic moon with patterns on it.

u/Xen

love it!
u/KilledByAPixel

That's no moon...
u/katkip

It's a space station then

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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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magna

remix of d/14539 by u/KilledByAPixel

function u(t) {

with(x)font="70em impact",fillText("GLITCH",0,999,1920),(d=getImageData(0,0,2e3,2e3)).data.copyWithin(Math.random()*4e7),putImageData(d,0,0)

Jun 13 2019 2:47 AM UTC

}// 140/140

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GLITCH

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