Dweets awesomed by u/rsrsrs

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: #Opposites

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dragon7076

function u(t) {

o=127
p=Math.PI*2/3
x.fillStyle=R(o+o*S(t),o+o*S(t-p),o+o*S(t+p))
x.fillRect(0,0,1920,1080)

Mar 12 2019 2:11 PM UTC

}// 91/140

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mathematically correct sine rainbow, replace p with 2 for approximate, but more compact, sine rainbow

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u/dragon7076

dang I forgot the 0.5 on 127
u/dragon7076

it's mathematically correct ¯\_(ツ)_/¯
u/dragon7076

it's not*
u/katkip

?
u/Undefined

o=127.5 p=Math.PI*2/3 c.style.background=R(o+o*S(t),o+o*S(t-p),o+o*S(t+p)) - you don't need to fill the entire screen to set a background ;)
u/katkip

Oh I understand now what's this

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katkip

function u(t) {

c.width*=1;t||(Y=0);f=p=>S(p*S(p+t/9))<0;for(i=200;i--;)for(j=200;j--;)if(f(i|j))x.fillRect(560+i*4,100+j*4,4,4)

Mar 9 2019 6:37 PM UTC

}// 112/140

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katkip

function u(t) {

eval(unescape(escape`砮杬潢慬䅬灨愽⸱㭸⹦楬汒散琨〬〬㉥㌬㉥㌩㭲㵍慴栮牡湤潭㭦㵰㴾匨⵰⼴㈫琪㈩㱓⡴⤻景爨椽㠹㤻椭ⴻ⥻堽爨⤪ㄹ㄰ⱙ㵲⠩⨱〷〻楦⡦⡙⼴幘⼴⤩砮捬敡牒散琨堬夬㄰ⰱ〩紻`.replace(/u(..)/g,"$1%")))

Mar 9 2019 8:58 AM UTC

}// 125/140

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Electricity. Sadly, #compressed x.globalAlpha=.1;x.fillRect(0,0,2e3,2e3);r=Math.random;f=p=>S(-p/42+t*2)<S(t);for(i=899;i--;){X=r()*1910,Y=r()*1070;if(f(Y/4^X/4))x.clearRect(X,Y,10,10)};

u/magna

Lovely aesthetic
u/corporateanon

Sometimes i see something like this before i fall asleep
u/mcdxn

or after sneezing!

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pavel

remix of d/12693 by u/danny@hille.dk

function u(t) {

for(i=c.width|=p=240;i--;e>0&&x.fillRect(q+i%5*500,i-p,e,20))q=S(a=3*S(t/2)+i*.3146)*p,e=C(a)*p-q,x.fillStyle=`hsl(${i*90},99%,${8*e**.3}%`

Mar 9 2019 3:54 AM UTC

}// 139/140

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u/katkip

This looks so much like a WebGL dweet but it isn't.
u/joeytwiddle

#twister

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rnbw

function u(t) {

c.width=700
x.fillStyle=`#d94`
for(i=-4;i++<53;)for(j=(i+S(t/3+i/3)*10-30);j++<13;)x.fillRect(i*30-30+S(t/3+j)*50,j*30,40,16)

Mar 8 2019 7:29 PM UTC

}// 125/140

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odd... stripes? can i CALL them that??

u/Xen

nicely done
u/katkip

So smooth! :D

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Xen

function u(t) {

for(c.width=800,i=199;i--;x.rotate(C(i*S(t/i*9))/i))x.rect(0,0,i*4,i*3);x.fill(`evenodd`)

Mar 8 2019 4:53 PM UTC

}// 89/140

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u/katkip

Pretty #massive

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danny@hille.dk

remix of d/12686 by u/danny@hille.dk

function u(t) {

for(c.width|=i=0;i<66;)x.fillRect(960+S(t+(i*3))*99,i++*17,99,17)

Mar 7 2019 11:31 PM UTC

}// 65/140

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andrea270872

remix of d/12677 by u/andrea270872

function u(t) {

I=(t*3350)%2e3;J=(t*94)%1e3
A=I/900-1;B=J/500-1
i=0;while(((A*A+B*B)<4)&&(i<25))[A,B]=[A*A-B*B-.8,2*A*B+.2,i++]
x.fillRect(I,J,i*=2,i)

Mar 7 2019 5:38 PM UTC

}// 134/140

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Ghost of Julia ver3

u/f8f82804

#dither #halftone #fractal

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oddgoo

function u(t) {

c.width=1e3;l=255
for(i=470;i>S(t);i--)for(j=0;j<3;j++){x.fillStyle=R(j*l/2,l-j*l,j*l/4);x.fillRect(i*2,S((i+t*59)/30)%(S(t))*l+l+j*9,20,9)}

Mar 6 2019 9:51 PM UTC

}// 140/140

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Sour Waves

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katkip

function u(t) {

t||(X=y=1)
f=x=>C(x)*S(x)*x/92+S(x*3.1416)/6
for(i=999;i--;)x.fillRect(960+X*20,540+y*20,10,10),y+=f(X),X+=f(y)

Mar 6 2019 4:35 PM UTC

}// 111/140

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Create your own chaotic #attractor curves #application modify f=x=

u/katkip

Beautiful #math
u/tomxor

I found a moose! :P f=x=>C(x)*T(x)*x/24+S(x/4)+C(x/8)
u/rep_movsd

#underrated

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