Dweets awesomed by u/danny@hille.dk

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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DazeWare

function u(t) {

for (i=0;i<9;i++){
x.fillRect(25*t*S(t)+960,25*t*C(t)+540,r=10*Math.random(),r*i)}

Mar 3 2023 2:26 PM UTC

}// 83/140

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taupelink

remix of d/27124 by u/taupelink

function u(t) {

eval(unescape(escape`景爨洽㈲〻堽匨津㐪㈪洫洩ⱙ㵓⡭⩭ⴭ⤻砮晩汬剥捴⠹㘰⬴㠰⩘ⰷ㘵⵶⩺⩭⭩⩙Ⱪ⩃⡭⭩⩤⤯稬⵭⽤⨪⸵⤩瘽⸶⨪琬搽⡺㴱⬨ㄭ瘩⩴⨪㌩⨪稬砮晩汬却祬攽刨洭洪瘬椽津⠳⵶⩙⤪㘰ⱭⰨㄫ䌨洩⤯⠲⭤⼲⤩`.replace(/u([^D].)/g,'$1%')))

Mar 3 2023 2:59 AM UTC

}// 140/140

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d/27143

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rodrigo.siqueira

remix of d/27141 by u/rodrigo.siqueira

function u(t) {

for(i=4e4;i--;x.fillRect(145*X,275*Y,t<5,X*X-f&3))X=i*i/t%14,Y=3*T(i+t),f=((6-Y-S(X*C(Y)))**2+T(X-2)**3)

Mar 2 2023 9:29 PM UTC

}// 104/140

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Pattern strips

u/_louis

very nice!

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rodrigo.siqueira

remix of d/27140 by u/taupelink

function u(t) {

for(i=4e4;i--;x.fillRect(170*X,275*Y,t<7,X*X-f&3))X=i*i/t%12,Y=3*T(i+t),f=((6-Y-S(X*C(Y)))**2+(X-5)**3)

Mar 2 2023 9:25 PM UTC

}// 103/140

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Pattern ripples

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taupelink

remix of d/27134 by u/taupelink

function u(t) {

eval(unescape(escape`景爨椽ㅥ㐻椭ⴻ砮晩汬剥捴⠱㘰⩘ⰱ㠰⩙ⱙ⨶⬲⩦☳ⱘ⨲⭦☳⤩堽椯㤪琥㄰⬱ⱙ㴳⬲⩃⡩⭴⤬昽⠨㘭夭匨堪䌨天⤩⨪㈭⡘ⴶ⤪⨲⤯㘬砮晩汬却祬攽恨獬⠤笱㤵ⵦ紬⑻㔰ⵦ⩦┱⨳ぽ┬⑻㜰⬱㔪䌨春㈩紥⥠`.replace(/u([^D].)/g,'$1%')))

Mar 2 2023 5:54 PM UTC

}// 139/140

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d/27140

u/Joachim

Coool

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rodrigo.siqueira

remix of d/27135 by u/danny@hille.dk

function u(t) {

for(x.fillRect(0,0,i=2e3,i*!t);i--;x.fillStyle=R(235-k*62))I=i%2e3,X=I/28|0,k=S(i*i+t)*2+2|0,x.fillRect(X*37,I%28*39,30,30)

Mar 2 2023 12:25 PM UTC

}// 123/140

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Red pixel interaction

u/rodrigo.siqueira

Two code golf tricks here: x.fillRect(0,0,i=2e3,i*!t)
u/danny@hille.dk

nice trick i*!t!!!! - slight golf: 111b for(x.fillRect(0,0,i=2e3,i*!t);i--;x.fillStyle=R(235-(S(i*i+t)*2+2|0)*62))x.fillRect(37*(i/28|0),i%28*39,30,30)

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shubshub

function u(t) {

r=()=>{return 400*Math.random()};
p=R(r(),r(),r(),1),
x.fillStyle=p,x.fillRect(960+S(r())*400,500+C(t*3)*r(),1,5)

Mar 2 2023 10:40 AM UTC

}// 113/140

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The Patient Square

u/danny@hille.dk

Arrow functions can be simplified, if you only have one argument you don't need parentheses, and if your result can be expressed as a a single line you don't need curly brackets and return
u/danny@hille.dk

so r can be simplified to: r=_=>Math.random()*400
u/danny@hille.dk

Since you are using the custom random function more than four times, you can go even further with the golf. You can use a trick where you override the valueOf on an object; normally, you need to create an object, but since you don't use the trigonometric function T, you can use it like this: T.valueOf=_=>400*Math.random() x.fillStyle=R(T,T,T) x.fillRect(960+S(T)*400,500+C(t*3)*T,1,5)
u/danny@hille.dk

u/magna used this trick in d/22152
u/_louis

Thank you for the advice, Danny! ;-)

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danny@hille.dk

function u(t) {

t?c.width*=1:A=[]
for(m=frame,i=0;i<100;i++)i%m===m-1&&(A[i]=!A[i]),A[i]&&x.fillRect(i%10*64,(i/10|0)*64,60,60)

Mar 1 2023 11:04 PM UTC

}// 111/140

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The Light Switch Problem - Numberphile

u/danny@hille.dk

https://youtu.be/-UBDRX6bk-A
u/magna

Jumping straight to the solution: d/27161

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danny@hille.dk

remix of d/27126 by u/magna

function u(t) {

c.width=730;for(i=336;i--;x.fillRect(I/14<<5,I%14*30,28,28))I=i%364,k=(C(i*i+t)+1),x.fillStyle=R(265-k*120,280-k*90,150-k*60)

Mar 1 2023 8:07 PM UTC

}// 126/140

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golf & play

Show more comments…
u/danny@hille.dk

btw u/magna nice metaballs github trick :-)
u/danny@hille.dk

117b c.width=730;for(i=336;i--;x.fillRect(i/14<<5,i%14*30,28,28))k=(C(i*i+t)+1),x.fillStyle=R(265-k*120,280-k*90,150-k*60)
u/danny@hille.dk

113b for(i=c.width=730;i--;x.fillRect(i/14<<5,i%14*30,28,28))k=(C(i*i+t)+1),x.fillStyle=R(265-k*120,280-k*90,150-k*60)
u/rodrigo.siqueira

103b for(i=2e3;i--;x.fillRect(i/14<<4,i%84*84,88,78))k=S(i*i+t)+1,x.fillStyle=R(265-k*120,280-k*90,150-k*60)
u/rodrigo.siqueira

97b for(i=2e3;i--;x.fillRect(i,i%84*84,78,78))k=S(i*i+t)+1,x.fillStyle=R(265-k*120,280-k*90,150-k*60)
u/danny@hille.dk

Nice golfing u/rodrigo.siqueira

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rodrigo.siqueira

remix of d/27130 by u/taupelink

function u(t) {

for(i=1e4;i--;x.fillRect(60*X,60*Y,k=f&1,t<7))
X=i/356+2,Y=C(i*t)*8+9,f=(Y/3%(X%4+1|2)-2)-3/T(i*t+6)+(X/2%(Y%5|2)-2)**2+X

Mar 1 2023 2:50 PM UTC

}// 121/140

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Subtractive fragmentation

u/taupelink

Whoa

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