Dweets awesomed by u/rep_movsd

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: #Food

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erin

remix of d/21805 by u/erin

function u(t) {

c.width=w=130;for(i=1e4;i--;)x.fillRect(X=i%w,Y=i/w,e=S(i/1e7*i+t)*5,2),x.fillStyle=`hsla(${185+e*1.5},40%,40%,${S(i*i)}`

Mar 4 2021 4:09 AM UTC

}// 121/140

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ocean waves #water #sea #tides #waves

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u/tomxor

Nice!
u/tomxor

I can hear this :)
u/erin

haha thank you!
u/darrinm

Beautiful!
u/erin

thank you!!!
u/magna

Whoa!
u/DataMeta

woww

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tomxor

remix of d/21783 by u/tomxor

function u(t) {

A=t?A.map(a=>(s=u[a>>4]^=1,x[s?'fillRect':'clearRect'](a>>6,a&1008,16,16),a=a+2*s+1&~4,a+=a&1?a%4-2<<10:a%4-1<<4)):[54675,69010,69233,54896]

Mar 2 2021 11:27 PM UTC

}// 140/140

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Multi #langton's #ant

u/tomxor

Squashed each ant into a 16bit bit field, [X,Y,D] = 0b 111111 111111 0111. These ants were generated with: X=7,Y=7,D=0,[[-X,-Y,3+D],[+Y,-X,2+D],[+X,+Y,1+D],[-Y,+X,0+D]].map(([X,Y,D])=>X+60<<10|Y+32<<4|D%4<<0)
u/mark1626

This is incredible. Just one question, how does s = u[a >> 4] ^= 1 work?
u/tomxor

Thanks :) a>>4 is the cell index of a 64x64 grid. the lower 4 bits are for the ant's direction so shifting them off to the right leaves only the 12 X and Y bits (see above). u is just an object, so all of these indicies will be undefined initially, but undefined is falsey and bitwise operators coerce falsey into 0, i.e undefined ^ 1 == 0 ^ 1 == 1, in otherwords XOR just treats all of the initial cell values as 0. Using the assignment version ^= means we toggle each cell between 0 and 1 each time an ant passes through it (which is part of the langton ant rules).

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erin

remix of d/21475 by u/erin

function u(t) {

c.width=w=70;for(i=4e3;i--;)x.fillRect(X=i%w,Y=i/w,5*S(i+t)-4,1),x.fillStyle=`hsla(200,40%,40%,${T(i*i)}`

Mar 2 2021 3:26 PM UTC

}// 105/140

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golfed, made water blue, etc. room for fun, if anyone wants to try anything

u/erin

#water #sea #tides
u/erin

#waves

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erin

remix of d/21796 by u/erin

function u(t) {

for(d=i=540;i--;)x.fillRect(25*S(t*2.6)+i*100+(2.6*t&3)*25,t/9*d,45,1)

Mar 2 2021 2:15 PM UTC

}// 71/140

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barbed wire pattern

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anotherkitten

function u(t) {

for(i=99;i--;)x.fillStyle=R(255,180+S(t-i/4)*20,220+C(i/4+t*6.73)*30),x.fill(p=new Path2D(),p.arc(960+S(t)*5*(99-i),540,i*15,i/4+t,i/4+t+2))

Feb 20 2021 7:05 AM UTC

}// 140/140

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spiraling walls

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erin

function u(t) {

x.font = "450px Arial";
x.fillText(`👁👁`, 365,600)
x.fillText(`👃`, 650,900)
throw`\n`.repeat(S(9*t)*15+15)

Feb 19 2021 11:14 PM UTC

}// 105/140

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talking man

u/aleamb

lol
u/EliteDaMyth

101 chars - throw x.font="450px Arial",x.fillText("👁👁",365,600),x.fillText("👃",650,900),"\n".repeat(15*S(9*t)+15)
u/erin

does someone want to attempt to give him a tongue/teeth?
u/DataMeta

some quick teeth :) x.font="450px Arial"; x.fillText(👁👁,365,600) x.fillText(👃,650,900) throw'■'.repeat(28)+\n.repeat(S(9*t)*9+9)+'■'.repeat(28)

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erin

remix of d/21688 by u/Xen

function u(t) {

for(c.width=i=1e3;i--;x.arc(480,270,200,i*i*i+t,t))x.lineWidth=.1;x.stroke()

Feb 17 2021 4:37 AM UTC

}// 76/140

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meeting

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katkip

remix of d/21662 by u/Pascal

function u(t) {

c.style.filter=`invert(`
for(c.width|=0,i=244;i--;x.fill(x.arc((X=i%18)*120,(i-X)*7.5+60,z=80+S(t+i*19+t)*50,3.9+z/7,7+z/7)))x.beginPath()

Feb 13 2021 11:12 AM UTC

}// 138/140

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d/21666

u/joeytwiddle

I see scurrying insects

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Odog8

function u(t) {

t?0:c.width=40
y=frame
x.fillRect(y%16+1,~~(y/16)+1,1,'êᠵ珔ᇠ팈龏㯡ꅰ骃ᛈȷ赇缴䱬꽌࠘駂蝫ᛢࡒ'.charCodeAt(y/10).toString(3).split``.reverse()[y%10]/2)

Feb 12 2021 7:19 PM UTC

}// 137/140

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Mario! Took forever to golf

u/Odog8

#pixelart #mario
u/Odog8

If you change some of the parameters, you could set it to 4 colors, but i didnt need to lol
u/rodrigo.siqueira

You can save 2 characters if you remove 2 first lines of code and start with: t?x.fillRect(y++%16..... and end with: .../2):(y=0,c.width=40)
u/Odog8

oh sick, i didnt think of that! thanks man

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erin

remix of d/21637 by u/erin

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪁼👷🐹𝠰𒡦𫱲𚁩🐴𩐳𞱩𛐭𞰩𮰊𦀽𜠪𠰨𥐽𪐩𚱃𚁖👴𚱩𚡩𚐬𒡙👓𚁕𚱴𚐪𠰨𥠩𛐲𛀊𦠽𤰨𥐩𛐵𒡸𛡦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𤰨𭀩𚠹𞑽𛀶𞐥𛀤𮱓𚀱𜀪𭀫𥠯𥐩𚠹𞑽𙐩𨀊𮀮𩡩𫁬𤡥𨱴𚁷𚱷𚡘𛱚𛁷𛑙𛱚𚡷𛁳👷𛱚𛱚𛱚𛁳𚑽`.replace(/u../g,'')))

Feb 11 2021 10:29 PM UTC

}// 130/140

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intertwined circles

u/erin

this is by far my best dweet
u/erin

#laser #circle #d3

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