Random dweets | Dwitter

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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Xen

remix of d/14741 by u/Kash

function u(t) {

for(c.width=i=2e3;i--;)x.fillRect(960+i*C(i*t),540+i*S(t*i),9,9)

Jun 24 2019 5:17 PM UTC

}// 64/140

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Golfed a bit for Kash

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katkip

remix of d/13246 by u/katkip

function u(t) {

c.width+=0;x.translate(960,540);x.globalAlpha=.03;for(r=4;r<999;r+=5)x.fillRect(-r/2,-390+r/2,10+r,r/4),x.rotate(C(t*2+r/150)/29)

Apr 15 2019 11:57 AM UTC

}// 129/140

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u/joeytwiddle

Mechanical but ghostly

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tomxor

remix of d/18733 by u/joeytwiddle

function u(t) {

D=[5,4,3]
for(i=1e3;i;E=i--%8?E+'X0123456789*/+-&|^~'[(i^i*t)%19]:'')try{D.every((Y,X)=>Y==eval(E))&&(S[E]=1)}catch{}throw Object.keys(S)+E

May 12 2020 11:17 AM UTC

}// 139/140

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Expression Miner #improved

Show more comments…
u/tomxor

1k tests per frame + variable length + deterministic + keeps solution set
u/tomxor

... +4 chars :P
u/tomxor

Struggling to get it to find anything non linear though e.g D=[0,1,2,4,8]
u/tomxor

#fuzzing
u/joeytwiddle

Great, usable! Off of dwitter, this one generates valid syntax from a grammar: https://github.com/joeytwiddle/dweets-dev/bl…
u/tomxor

Interesting. I once wrote an n-card "24 game" solver which is similar but far more limited in terms of operators - by far the most significant optimization i could find was to combinations based on subexpressions that are equivalent to one already traversed i.e nodes in your AST - maybe that could be applied to yours as well?
u/tomxor

* to prune combinations
u/tomxor

oh and the other fairly decent optimization was pruning combinations based on commutativity of binary operators... i.e another kind of equivalence
u/tomxor

I should clarify: to by pruning I mean not mearly skipping evaluation of individual permutations but to be able to skip entire subtrees of permutations by detecting equivalence at the root of that subtree.
u/joeytwiddle

Pruning does sound sensible, but I'm not sure how to approach it.
u/joeytwiddle

I am also having difficultly with >3 non-trivial outputs. I think the search space is too large. But at least I found some simplifications, such as: [1,3,5,7] => X-~X
u/tomxor

Finally got it to solve a non linear one: D=[2,3,6,11,18,27] (2+X*X), just need a bit more patience

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Xen

function u(t) {

for(i=73;i--;x.strokeStyle=`hsl(${t*73} 50%50%`)x.strokeRect(987,567,C(t*t)*2e3,S(t*7.3*t)*1e3)

Aug 8 2024 9:01 PM UTC

}// 95/140

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95 Art

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katkip

function u(t) {

c.width*=1;x.font='3cm"';for(i=9;i--;)x.fillText(document.head.innerHTML.substring(99+t,2e3),-Math.abs(C(t*i/9+i)+t)*1000,100+i*120);

May 22 2019 11:42 AM UTC

}// 133/140

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What does a programmer dream at night?

u/Xen

niice
u/joeytwiddle

#parallax #text

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KilledByAPixel

remix of d/15977 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󭌿󭼽󨼮󭽩󩍴󪍼󟜰󞭁󟝂󟜰󒭦󫽲󚍩󟜱󩜴󞽩󛜭󞽵󦽩󧜽󭌿󭝛󪝝󚬨󜜭󜜯󩌩󚽁󛽤󞬳󜌰󚝲󟝵󦽩󧜬󮌮󩭩󫍬󤭥󨽴󚍘󟜹󝬰󚽓󚍡󟝩󛼹󚽴󚜪󬬬󚍙󟜱󩜳󛝩󛼱󜬩󚽲󛼹󚭃󚍡󚜬󞜬󞜩󛍤󟜱󚼨󦜭󠬩󚬪󜬯󝜰󒭯󫭭󫽵󬽥󫝯󭭥󟝥󟜾󮽺󟝩󫭮󩝲󥽩󩍴󪌯󭼬󠜽󩜮󮌯󮬭󞜶󜌬󠬽󩜮󮜯󮭽`.replace(/u../g,'')))

Aug 22 2023 2:36 PM UTC

}// 140/140

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Pottery ⚱️ Use Mouse To Shape #interactive

u/rodrigo.siqueira

I enjoy making pottery using this app. The only thing it's missing is an option to export to a 3D printer.
u/cantelope

:D
u/jdspugh

Great idea!

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iznax

function u(t) {

for(x.beginPath(),i=60;i;x.fill(x[--i%3?'lineTo':'moveTo'](960+S(i*.13+t)*1e3,500+C(i*.2+t/.55)*500)))x.fillStyle=R(68+t*8%99,i,i*S(t)*8,.1)

Feb 1 2020 5:53 AM UTC

}// 140/140

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Dream Weaver

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space_hopper

function u(t) {

k=t
c.width+=0
for(i=-Math.PI;i<Math.PI;i+=0.01){
p=960*C(k*i)*C(i)
q=540*C(k*i)*S(i)
x.lineTo(p+960,q+540)
}x.stroke()
x.fill("evenodd")

Dec 28 2017 3:50 AM UTC

}// 138/140

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taupelink

remix of d/23277 by u/taupelink

function u(t) {

for(i=q=400;--i;x.fillRect(q*X,q*Y,-i/2**t,-i/t**t))f=997*i*t,X=f*f%16,Y=X*f%9,x.fillStyle=R(q+=S(q%Y)*i/8,q+=S(q/X)*i*Y/9,q%=3e4/i,q/i/3/t)

Jul 2 2021 6:11 PM UTC

}// 140/140

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d/23278

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yokiebob

function u(t) {

t?(w=T<100,C+=w,c.width|=0,x.font="99px Arial",x.fillStyle=w?0:"#f00"):T=C=0,document.onkeyup=a=>T++
x[l="fillText"](T,0,99)
x[l](C,0,200)

Apr 13 2025 12:20 AM UTC

}// 138/140

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hit 100 keys #interactive

u/cantelope

would be better with a brief countdown / intro... hard to race if you're not ready! fun