Dweets awesomed by u/dragon7076

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

Show more comments…
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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dragon7076

function u(t) {

for(i=120;i--;){x.fillStyle=R(200+55*S(i+t),0,99+99*S(i+t+2));x.fillRect(811+999*S(t+i),i*9-99,910,99)}

Mar 12 2019 1:58 PM UTC

}// 103/140

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pythech

remix of d/8300 by u/pythech

function u(t) {

with(x)for(c.width|=i=16;--i;)for(j=9;--j;beginPath(),m=T(t/128*i*j)*64,fillStyle=`hsl(${j*t},65%,50%)`,arc(i*120+m,m+120*j,64,0,9),fill());

May 29 2018 5:56 PM UTC

}// 140/140

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joeytwiddle

function u(t) {

for(c.width|=k=511;k--;x.fillRect(960-W-500*S(j/41)*C(a),960-j*(i+S(a)),2*W,9))i=k>>5,j=k%32,x.fillStyle='#f7f'+j/5,W=99*S(j/10)*S(a=t+i*17)

May 29 2018 10:12 AM UTC

}// 140/140

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Happy Vesak! https://en.wikipedia.org/wiki/Vesak

u/joeytwiddle

Here is the colourful 3d version: https://codegolf.tk/a/270
u/fujimotos

Lotus!
u/hollo47

This is absolutely beautiful!
u/lionleaf

Amazing! #vesak #flower
u/aleamb

great!!

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S.T.L.K.R.

function u(t) {

c.width=-1
c.onmousemove=d=>a=d.x
for(i=9;i--;){p=i*30
x.moveTo(0,p)
x.arcTo(3e2,a*i,0,p,9)
x.moveTo(p,0)
x.arcTo(a*i,3e2,p,0,9)
x.stroke()}

May 28 2018 10:59 PM UTC

}// 140/140

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move your mouse over for grid i guess

u/lionleaf

Awesome #interactive

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jylikangas

remix of d/7978 by u/BuRRak

function u(t) {

for(X=120,Y=99,c.width=i=-1;++i-3;x.font=2.5-i+"em a",x.fillText([...'🌞🌍🌑'][i],X+=r/2+C(a=t*i**2)*r,Y+=S(a)*r)-r/2)r=i*(90-i*40)

May 4 2018 9:00 PM UTC

}// 128/140

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Different implementation. Arc version in the comments below.

u/jylikangas

with(x)for(X=150,Y=90,c.width=i=-1;++i-3;arc(X+=C(a=t*i*i)*r,Y+=S(a)*r,k/4,0,7),beginPath(fill()))r=i*(k=80-i*35),fillStyle=R(v=!i*X,v,r*4)
u/prplz

Is it flat?
u/BuRRak

You guys are crazy :D
u/micahcowan

#emoji

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jylikangas

function u(t) {

for(c.width=i=-1;i++<125;)for(j=75;j--;x.fillRect(99+i-j,(i+j)/(2+T(t)/2)+!h,h|1,~h))h=t+j/13&i/9-t*6,h*=(h<5)*5,x.fillStyle=R(0,i+j,!h*200)

Apr 14 2018 4:56 PM UTC

}// 140/140

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Isometric Islands

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dragon7076

function u(t) {

P=Math.PI*2/3
x.fillStyle = R(S(t)*255,S(t-P)*255,(S(t+P))*255);
for(i=1;i<10;i++)
x.fillRect(960+i*99*C(t),10*t+i*99*S(2*t),10,10)

Apr 10 2018 1:20 PM UTC

}// 131/140

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Colour version

u/Galaxtone

... colour lines!
u/Galaxtone

btw Math.PI*2/3 is about 2.094 so you can just remove the P line and replace P with 2 and get the same effect, saving 14 bytes.

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dragon7076

function u(t) {

for(i=1;i<10;i++)
x.fillRect(960+i*99*C(t),10*t+i*99*S(2*t),10,10)

Apr 10 2018 11:34 AM UTC

}// 66/140

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dragon7076

function u(t) {

P=Math.PI*2/3;x.fillStyle = R(S(t)*255,S(t-P)*255,(S(t+P))*255);for(i=99;i--;)x.fillRect(16000*Math.random()/t,9000*Math.random()/t, 20,20)

Apr 4 2018 3:13 PM UTC

}// 140/140

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