Dweets awesomed by u/magna

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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Xen

function u(t) {

c.width=99;for(i=2e2;i--;x.fillStyle=R(i))x.fillRect(50+T(i+t)*8,30+S(i+t)*8,X=C(t+i)*4,X/2),x.fillText('EN    Shoutz 2 CodeGolfTeam',74,33)

Aug 8 2017 10:33 PM UTC

}// 140/140

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u/sigveseb

This one is pretty cool!
u/magna

You can shave a lot of bytes by removing the shoutz. :P
u/Xen

my fillstyle and filltext did make use of 'X' but there just wasn't enough shoutz ;)

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xiho

remix of d/3036 by u/artfarnaa

function u(t) {

 for (c.width|=a=100;--a;x.arc(960-S(G+t)*200,
 540+C(t+G)*400,Math.abs(S(t))+50,0,
 1))x.moveTo(G=a/5|960,540)
 x.fill('evenodd')

Aug 8 2017 10:01 AM UTC

}// 130/140

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artfarnaa

function u(t) {

 for (c.width|=a=200;--a;x.arc(960+S(G+t)*400,
 540+C(t+G*1)*400,a%2*137*Math.abs(S(t))*4,0,
 6.2832))x.moveTo(G=a/2|0,0)
 x.fill('evenodd')

Aug 8 2017 1:52 AM UTC

}// 140/140

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Show more comments…
u/kchplr

Great !
u/sigveseb

Awesome!
u/ninerdelta

stupid question, but why c.width|=a=200? I was tinkering with this code and just made it a=200 and the fps drops significantly.
u/kchplr

ninerdelta: I think that the reason is that c.width|=something is not only clearing the canvas but also the 2d context. Without it each iterations keeps adding arcs to the current path, by the 10th frames there are 2000 arcs to redraw, by the 50th frames there are 10000, etc. In a, err, "non-cold golfing codebase" you could avoid this by using beginPath and closePath.
u/kchplr

"cold golfing", superb. I meant code golfing...
u/ninerdelta

ah that makes sense, thanks!
u/donbright

now this is fine work

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artfarnaa

function u(t) {

 for (c.width|=a=12;--a;x.arc(960+S(G+t)*400,
 540+C(t+G*1)*400,a%2*137*Math.abs(S(t))*4,0,
 6.2832))x.moveTo(G=a/2|0,0)
 x.fill('evenodd')

Aug 8 2017 1:22 AM UTC

}// 139/140

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u/donbright

great use of evenodd

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yokljo

function u(t) {

x.globalAlpha=.05
x.fillRect(0,0,2e3,2e3)
x.save()
x.rotate(S(t*2)*.2)
x.clearRect(S(t)*700+900,C(t*5.2)*100+400,200,200)
x.restore()

Aug 7 2017 1:00 PM UTC

}// 133/140

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u/joeytwiddle

Cute motion!
u/danni

The ghost of Windows past
u/PiggyClone205

Very reminiscent of the PS2 browser.

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New_Core

remix of d/3029 by u/cantelope

function u(t) {

x.globalAlpha=.2;for(x.fillRect(0,0,2e3,2e3),W=j=980;--j;x.clearRect(W+S(p=t+j-5.3*V)/Z*W-Z*-9,540+C(p)/Z*W,s=60/Z,s))Z=j%98-t*6+(V=t*6|0)

Aug 7 2017 10:55 AM UTC

}// 138/140

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in the j%98 try also %83.1,%88,%104

u/cantelope

nice!
u/sigveseb

pretty sweet tunnel!
u/New_Core

#tunnel

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cantelope

remix of d/3028 by u/cantelope

function u(t) {

for(x.fillRect(0,0,2e3,2e3),W=960,j=99;--j;)for(i=9;i--;x.clearRect(W+S(p=.7*i+j/4-6.03*V)/Z*W-Z*9,540+C(p)/Z*W,s=99/Z,s))Z=j-t*6+(V=t*6|0)

Aug 7 2017 3:56 AM UTC

}// 139/140

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change C(p) to C(i) for kicks

u/New_Core

try this... for(x.fillRect(0,0,2e3,2e3),Z=V=W=960,j=950;--j;Z=j%98-t*6+(V=t*6|0))x.clearRect(W+S(p=t+j/4-6.03*V)/Z*W-Z*9,540+C(p)/Z*W,s=99/Z,s)

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cantelope

function u(t) {

for(V=(c.width=1e3)/2,H=j=99;j--;x.stroke())for(x.beginPath(),i=H,Z=i-j;i--;x.lineTo(V+X/Z*V,(S(i/5+C(t)*4)*C(j/9-t*7)*j/9+30)/Z*V))X=H-i*2

Aug 6 2017 6:10 AM UTC

}// 139/140

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mostly what i was going for... not exactly.

u/joeytwiddle

smooth

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Xen

remix of d/3017 by u/kchplr

function u(t) {

for(i=0;i<99;Y=S(i*2+t),X=(C(3*i)+C(t+i+Y)),x.fillRect(960+X*450,536+Y*500,i,i))i+=.5,x.fillStyle=`hsla(${i*i},99%,50%,.01`

Aug 5 2017 3:19 PM UTC

}// 123/140

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An lsd inkblot inspired by Kchplr inspired by Cantelope

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kchplr

function u(t) {

x.fillStyle='#0001';for(x.fillRect(0,0,2e3,2e3),i=0;i<6.29;Y=S(i*2+t),X=(C(2*i)+C(t+i+Y)),x.clearRect(960+X*450,536+Y*500,20,9))i+=.002

Aug 5 2017 2:42 PM UTC

}// 135/140

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A glowy curve, inspired by the inverted colors of https://www.dwitter.net/d/3015 by Cantelope

u/kchplr

Noticed it is very slow in firefox, has lot of artefact on Safari and doesn't even render properly in stable Chrome. The only browser rendering it correctly is Chrome Canary. Oh, well.
u/kchplr

Here is a version which renders correctly on stable Chrome : for(x.fillStyle='rgba(0,0,0,.1)',x.fillRect(0,i=0,2e3,2e3);i<7;Y=S(i*2+t),X=(C(2*i)+C(t+i+Y)),x.clearRect(960+X*450,536+Y*500,20,9))i+=.002

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