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.

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13thptr

function u(t) {

s=~~t+"";throw s.split``.map((e,i)=>(r="IXC",d="VLD"[i=s.length-1-i],b=r[i],e<4?b.repeat(e):e-4?e-9?e>4&e<9?d+b.repeat(e-5):0:b+r[i+1]:b+d))

May 30 2019 10:47 AM UTC

}// 140/140

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Counts up to 899

u/13thptr

Thanks to u/KilledByAPixel for the golfing help :)
u/joeytwiddle

optimvm laborvs!
u/13thptr

turns out someone made a more elegant and "general" implementation. The function is 136c long but it's not callable without compression inside Dwitter: https://codegolf.stackexchange.com/a/77961

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Joachim

function u(t) {

for(i=z=c.width=300;i--;x.fillRect(140+a*i+C(t*9)*30,90+i*(S(t*9%3.1)/9+.3),i,i/z))a=T(z^z/i+t*4),x.fillStyle=R(b=a*z,S(b)*z,T(b)*z)

Apr 13 2022 9:23 AM UTC

}// 132/140

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Infinite hopscotch

u/Odog8

Thats nuts
u/Joachim

This 3D-like technique is useful for making single-direction ground textures. This is roughly how it works: A rectangle with a height of ~1px is drawn for every row of pixels on the screen. The width of every rectangle depends on how far down it is (their index). The x position of every rectangle is defined by this bit of code: T(z^z/i+t*9). This is then multiplied by their index to achieve a 3D look, as everything gets bigger & faster near the bottom of the screen. Without the animation or colours, the entire thing can get as small as 64 char: for(i=z=c.width=300;i--;)x.fillRect(140+T(z^z/i+t*9)*i,90+i,i,1). Feel free to get it even smaller!
u/vain

@u/Joachim: Thanks a lot for the litte explanation and example. =)
u/Joachim

#d3 #perspective #mist #colors
u/lineburgb

for(i=z=c.width=300;i--;)x.fillRect(140+T(z^z/i+t*9)*i,90+i,i,1)

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tomxor

remix of d/25365 by u/pavel

function u(t) {

for(c.width&=i=10386;i--;x.fillRect(X=i&127,Y=i>>7,1,!f(64)|!f(32,Y=X,X=i>>7)))f=s=>Math.round(((X&120)-s)/(1+1e4**S(t)**7))+Y&7

Apr 27 2022 12:24 AM UTC

}// 128/140

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Bit smoler, reverse rendering

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PoweredByWill

remix of d/20542 by u/KilledByAPixel

function u(t) {

with(x)for(c.width|=i=2;i--;clearRect(0,0,2e3,2e3))scale(i?30:1,i?30:-1),fillText('X88B88',2,(i?20:-16)-1.7*C(t)),clip(rect(0,18,2e3,18))

Nov 10 2020 3:05 PM UTC

}// 137/140

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voodoo

u/donbright

woah!

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vinca

function u(t) {

for(!t&&(c.width=1e3),x.font="460px'",i=100;i--;)x.shadowBlur=150+99*S(t),x.shadowColor=`hsl(${9*i*t},99%,50%`,x.fillText("🍄",200,440)

Mar 31 2019 9:13 AM UTC

}// 134/140

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#mushroom

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katur

function u(t) {

c.width|=0
k=.003
for(i=2e3;i--;){s=S(i/250-t*4),f=-20+s*250
x.fillStyle=R(f,f,f)
x.fillRect(957+s*i*.1,i*.45,6-i*k,6-i*k)}

Jul 12 2023 10:11 AM UTC

}// 123/140

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Andie

u/rodrigo.siqueira

"The Mouse's Tale" is a poem from Alice in Wonderland that has this shape of a mouse's tail.
u/katur

Nice association!! Love it <3

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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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baon

remix of d/28908 by u/baon

function u(t) {

if (t>0) return
for(i=0;i<256;i++) for(j=0;j<256;j++)
a = S(i-j^i+j)>0 ,x.fillStyle=R(0,0,0,1-a), x.fillRect(i*4+450, j*4, 4, 4)

Nov 22 2023 1:05 PM UTC

}// 128/140

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jbl

function u(t) {

c.width|=0;for(i=2e3;--i;){p=t-i;d=i/9;x.fillStyle=R(d,0,0,S(p));x.fillRect((C(p)*850)%2e3+S(t)*500+990,(i*11+t*99)%2e3-99,S(p)*90,90)}

Dec 28 2017 12:13 PM UTC

}// 135/140

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u/sigveseb

Nice sense of scale
u/Xen

love it
u/Xen

done you a remix: #4403
u/jbl

thanks!
u/Xen

very welcome ;-)
u/vain

Looks like some bumpmapped tower. Very impressive! Great work!

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SockTaters

remix of d/29667 by u/DaSpider

function u(t) {

t|=0
throw(t%3?'':'Fizz')+(t%5?'':'Buzz')||t

Nov 11 2024 8:22 AM UTC

}// 44/140

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#FizzBuzz in 44

u/SockTaters

This is a little refactored, but u/DaSpider's solution also works in 44 characters with just the t|=0 trick. A slicing solution is also very close at 45 char: t|=0;throw'FizzBuzz'.slice(t%3&&4,t%5?4:8)||t