New #rainbow dweets

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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Xen

remix of d/5798 by u/FrenchToast

function u(t) {

t?i=Z:Z=c.width=255
for(;i--;x.fill(x.arc(129-i*C(t+i),69+39*S(t+i/(S(t)+6)),i/9,0,9)))x.fillStyle=`hsla(${i+t*i},99%,50%,.1)`,x.beginPath()

Jan 10 2018 5:36 PM UTC

}// 140/140

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had to have a play

u/ETHproductions

I absolutely love this. Wish I could "Awesome!" multiple times, haha
u/Xen

one day there will be a "fav5" feature i bet ;-)
u/joeytwiddle

#rainbow #colors
u/katkip

#xweet

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ddoonn

function u(t) {

b=300
c.width=1920
t*=t
for(i=0;i<b * 9;i++){
x.fillStyle=`hsla(${i+t*90},90%,50%,.3)`
x.fillRect(960+i*C(r=i/b*t)-5,s=b+i*S(r)-5,100,50)
}

Jan 9 2018 11:35 PM UTC

}// 140/140

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u/iverjo

#rainbow

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Buckyballsack

function u(t) {

k=300;for(i=30;i--;)x.fillStyle=`hsl(${(t*80+i*10)},100%,50%)`,x.beginPath(),x.arc(k*S(t*3-i*.15)+960,k*S(t*.5-i*.05)+540,i*50,0,7),x.fill()

Dec 27 2017 2:57 AM UTC

}// 140/140

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u/joeytwiddle

#rainbow #tunnel

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Xen

remix of d/1791 by u/Run

function u(t) {

for(i=2e3;i--;x.fillStyle=`hsla(${t*X},80%,50%,.01)`)x.fillRect(X=i-S(t-i)*1e3,400+400*C(t+i)+400*S(X/400+t),90,90);

Nov 19 2017 6:23 PM UTC

}// 116/140

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Fixed for chrome users.

u/joeytwiddle

Chrome changed. I recommend 80%,64%,.01 #rainbow #plasma

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Xen

remix of d/1201 by u/bligglenuber

function u(t) {

x.fillStyle=`hsl(${(t*=5e2)/2},80%,50%)`
x.globalCompositeOperation='difference'
x.fillRect(t%1920,t%1080,9,9)
x.drawImage(c,0,9)

Nov 3 2017 8:09 PM UTC

}// 129/140

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it's raining rainbow sierpinski triangles!

u/zanella

I just did https://www.dwitter.net/d/4677, but yours kicked the hell out of mine. :D
u/Xen

thank you :-)
u/f8f82804

#rainbow #fractal

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joeytwiddle

remix of d/3116 by u/yokljo

function u(t) {

c.width|=k=150;for(j=k*6;j--;x.fillRect(300+i*9,180+b*k-i+(S(i**1.33/k-t*7))*i**.7,9,k))i=j/6|0,x.fillStyle=`hsl(${18*(b=j%6)**1.8},70%,55%`

Sep 5 2017 4:17 PM UTC

}// 140/140

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Pride Flag (unlit)

u/joeytwiddle

which coincidentally uses the exact same colours as the Mac spinner
u/joeytwiddle

This larger version has lighting and extra wobble: https://codegolf.tk/a/168
u/iverjo

#flag
u/f8f82804

#rainbow #pride

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joeytwiddle

remix of d/531 by u/BriSeven

function u(t) {

for(i=600;i--;x.fillRect(X=X+400+c*600>>1,Y=Y+1076*(1-c&1)>>1,4,4),H=H+400*(c+t)>>2)c=(i*t^i)%3,t?x.fillStyle=`hsl(${H},50%,50%)`:X=Y=H=0

Aug 21 2017 4:02 PM UTC

}// 137/140

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Sierpinksbow

Show more comments…
u/joeytwiddle

i*t^i is a poor but short PRNG
u/sigveseb

Upvote for the colors
u/BriSeven

fantastic
u/joeytwiddle

I forgot to brighten the dull colors. Try 90%,60%
u/donbright

my new favorite sierpinski
u/joeytwiddle

Big brother: https://www.dwitter.net/d/3458
u/joeytwiddle

Another with colour: d/2668
u/iverjo

#sierpinski
u/CocoMeister

#fractal
u/joeytwiddle

#rainbow

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puckipedia

function u(t) {

r=Math.random,v=w=t;for(i=2e3;i--;v=r()*240,w=r()*140)x.fillStyle=`hsl(${v+S(t+w/99)*70},99%,50%)`,x.fillRect(v*8,w*8,8,8)

Mar 3 2017 11:14 AM UTC

}// 122/140

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A weird rainbow-y thing that reminds me a bit of video compression

u/SpecialAgent

Reminds me of unicorn magic
u/joeytwiddle

#rainbow #plasma

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iverjo

remix of d/1791 by u/Run

function u(t) {

t*=4;c.width*=1;for(i=0;i<1550;i++)x.fillRect(X=i+S(t+i)*300,400+200*C(t+i)+200*S(X/300+t),50,50),x.fillStyle=`hsl(${X/7+t*90},80%,50%)`

Mar 2 2017 10:53 PM UTC

}// 136/140

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u/donbright

the happiest sandworm on dune
u/iverjo

#worm
u/iverjo

#colors #rainbow
u/iverjo

#sine

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FireFly

function u(t) {

t || x.translate(960, 540)
for (i=40; i--; x.rotate(S(t)))
 x.fillStyle = 'hsla('+i*t+',90%,50%,'+1/t+')',
 x.fillRect(v=i*20, v, i*t, i*t)

Mar 1 2017 8:05 PM UTC

}// 139/140

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Colour mania

u/iverjo

Nice!
u/Woodmouth

Ohh, if you wait long enough it goes grey, but then if you wait even longer, it quite suddenly goes back to color, and then suddenly even more grey
u/joeytwiddle

After that it ends up resting on a kind of shiny brushed metal pattern. Amazing!
u/joeytwiddle

#shiny
u/joeytwiddle

#color #rainbow (sorry for spamming the comments)

dwitter.net | #rainbow