Dweets awesomed by u/eftko

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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andrea270872

function u(t) {

c.width|=0
P=t?P.map(([i,j,z,v])=>[i,j,z?z-1:99,x.fillRect(1e3+1e3*i/z,500+500*j/z,z=500/z,z)]):[]
P[99]||P.push([t*97%11-5,t*79%11-6,99])

Mar 16 2019 2:22 PM UTC

}// 138/140

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asteroid shower (still working on getting the forLoop trick from #pavel :> )

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rrlyrae

function u(t) {

c.width|=0;x.translate(920,500);x.rotate(2*t);x.globalCompositeOperation='xor';for(i=0;i<15;i++)x.fillRect(-25,-25,50*i*C(i*t),50*i*S(i*t));

Feb 24 2019 7:45 AM UTC

}// 140/140

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Digital portal

u/rrlyrae

You can try replacing C with S there (or S with C) to make bouncing diamonds!

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rodrigo.siqueira

remix of d/12467 by u/rodrigo.siqueira

function u(t) {

t||(a=b=0)
for(i=3e3;i--;)x.fillStyle=`hsl(9,45%,${S(t*4)*50}%)`,x.fillRect(960+b*C(a)+(a&1?b:-b),540+b*S(a),1,2),a+=2*C(2.6*a)-t/2,b+=.001

Feb 22 2019 1:39 PM UTC

}// 139/140

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Symmetric bifurcations. The symmetry trick is ...+(a&1?b:-b), this will sometimes add a value ("b") and sometimes subtract. #bifurcation

u/iverjo

#scary #eyes
u/donbright

rodrigo these are amazing

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due

function u(t) {

eval(unescape(escape`琽〮〱Ⱳ㴲㔵㭣⹸㵣⹸籼琬挮礽挮祼簰Ᵽ⹺㵣⹺籼〻挮砫㴹⨨挮礭挮砩⩴㭣⹹⬽⡣⹸⨨㈸ⵣ⹺⤭挮礩⩴㭴㵣⹺⬽⡣⹹⩣⹸ⴳ⩣⹺⤪琻昽琯㐰⩲㭸⹦楬汓瑹汥㵒⡦⤻砮晩汬剥捴⠨挮砫㈹⤪㌰Ⱘ挮礫㈲⤪㈵ⱴⱴ⤻`.replace(/u(..)/g,"$1%")))

Feb 17 2019 9:31 PM UTC

}// 139/140

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Lazy Lorenz system with z colouring

u/katkip

#compressed
u/f8f82804

awesome #d3 effect

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katkip

function u(t) {

t||(a=b=1);for(i=999;i--;)a+=S(b*C(t)+1),b+=C(a-S(b-a)),x.fillRect(60+a*500,1340+b*500,2,2)

Feb 14 2019 6:30 PM UTC

}// 91/140

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Black hole and white hole #attractor and now the space-time tranfer is visible

u/katkip

b+=C(a-C(b+a)/2) is interesting too
u/tomxor

I've never played with attractors, they are so simple and pretty :)
u/katkip

Exactly

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pavel

function u(t) {

for(j=t?1e3:a=b=0;j--;x.fillRect(960+450*a,540+450*b,1,1))s=Math.random()<.5?-1:1,A=(Math.hypot(a,++b)+a)/2,b=(b<0?-s:s)*(A-a)**.5,a=s*A**.5

Feb 13 2019 9:09 PM UTC

}// 140/140

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IFS #julia attractor for c=i. Play with adding different constants to a and b in the Math.hypot call

u/pavel

a+=.123,b+=.745 is called Douady's rabbit fractal
u/katkip

How! Amazing
u/13thptr

#fractal

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21medals

function u(t) {

if(2>frame%(i=1e3))for(d=[];i--;)d[i]=i**9%540
for(c.width=i=999;i--;d[i]>(q=d[i+1])&&d.splice(i,2,q,d[i]))x.fillRect(i,0,1,d[i])

Feb 10 2019 1:36 PM UTC

}// 129/140

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Slowly sorting 1000 values using bubble #sort

u/21medals

if(2>frame%(i=1e3))for(d=[];i--;)d[i]=i**9%540 for(c.width=i;i-->0;v>(q=d[i+1])&&d.splice(i,2,q,v))x.fillStyle=hsl(${v=d[i]},99%,50%),x.fillRect(i,0,1,v)

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joeytwiddle

function u(t) {

c.width|=p=(X,Y,W,I,H=W/2)=>H>2?(p(X,Y,H,I*=Math.random()**.2),p(X+H,Y,H,I),p(X,Y+H,H,I),p(X+H,Y+H,H,I)):x.fillRect(X,Y,I,I),p(0,0,R=1024,9)

Jan 9 2019 3:15 PM UTC

}// 140/140

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a sort of rough #recursive #plasma #fractal

u/joeytwiddle

Ideally we would keep the edges smooth, by holding an intensity for each corner instead of the entire square
u/joeytwiddle

W=width, H=half width, I=intensity, p=plot/plasma/partition
u/joeytwiddle

p calls p four times for each sub-square, with a randomly smaller I

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rodrigo.siqueira

function u(t) {

c.width=600;
for(n=1;n<9;n++) {
 for(i=1;i<8;i=i+6.28/n) {
  x.lineTo(S(t)*C(i)*35+370+n*80-450,200+S(i)*80)
 }
 x.stroke()
}

Oct 25 2018 10:00 PM UTC

}// 126/140

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Polygon showcase

u/f8f82804

I love the 2-gon!

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tomxor

function u(t) {

x.fillRect(0,0,i=2e3,i)
for(t+=160;p=i&1,m=t/C(t/i)+p*(t/2+i%t),i--;)x.clearRect(
960+m*S(n=t/9+i*i)*C(!p*i/t),
540+m*C(n+p*2),s=3-C(n)*3,s)

Oct 17 2018 8:45 PM UTC

}// 140/140

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#space #planet #saturn

Show more comments…
u/joeytwiddle

Wow, beautiful! I am blown away. #dots #lighting #shading
u/lionleaf

Wow! That's amazing
u/magna

WOW!
u/sigveseb

no way!
u/yonatan

beautiful!
u/jellyedwards

That's incredible, well done!
u/jellyedwards

If you change this bit too use t it's like Saturn uses its ring as a hula hoop: 540+m*C(n+p*t)
u/katkip

woow... gj bro
u/keithclark

Nice!!!
u/aleamb

wow! superb!
u/iverjo

That's pretty rad
u/rnbw

my mind is officially boggled o_o
u/Purpzie

This is absolutely beautiful.
u/tomxor

Thanks for all the kind comments :) for those interested: the key is in the parity bit p=i&1 this allowed me to combine two different but similar functions by multiplying parts in an out on each iteration. You should be able to pull the two apart into something more intelligible.
u/magna

@tomxor are you on Twitter as @tomxor by any chance?
u/tomxor

I am not, nor am I on any other social network... unless you consider Github one :P but a different pseudonym..
u/jylikangas

Beautiful dweet!
u/aleamb

The Cosmos is all that is, or ever was, or ever will be. The contemplation of the this Cosmos stir us.
u/Renaud___

so Beautiful
u/ivylab

This is absolute badass
u/vain

OMG! This part blew me away!
u/jdspugh

Well done!

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