Dweets awesomed by u/iverjo

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

remix of d/3056 by u/Xen

function u(t) {

x.fillText(x.drawImage(c,480*(t%3|0),540*(t%3%2|0),960,540),9,9)

Aug 10 2017 11:59 PM UTC

}// 64/140

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64b Sierpinski Triangle

u/kchplr

60bytes: x.fillText(x.drawImage(c,480*(V=t%3|0),V%2*540,960,540),9,9)
u/magna

Oh yeah? How about EXACTLY 140 bytes: 'use strict';function renderSierpinskyTriangle() { x.fillText(x.drawImage(c,480*(V=t%3|0),V%2*540,960,540),9,9) }renderSierpinskyTriangle();
u/Xen

58bytes: x.fillText(x.drawImage(c,(V=t%3|0)*99,V%2*99,960,540),9,9)
u/iverjo

#sierpinski

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Xen

function u(t) {

x.fillText(x.drawImage(c,480*(t*9%3|0),540*((t*9%3|0)%2),960,540),9,9)

Aug 10 2017 11:13 PM UTC

}// 70/140

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-70Byte-Refix-

u/Xen

another 4 bytes can be shaved but it will take longer to draw ;-)
u/kchplr

62 bytes, same speed : x.fillText(x.drawImage(c,(V=t*9%3|0)*480,V%2*540,960,540),9,9)
u/kchplr

62 bytes and faster, but less interesting fade in: x.fillText(x.drawImage(c,(V=frame%3)*480,V%2*540,960,540),9,9)
u/iverjo

#sierpinski

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rybar

function u(t) {

for(i=2e3;i>-1;i--)x.fillStyle=R(255*C(i/5-t),255*S(i%8+t),255*C(i%8+t),1),x.fillRect(i%90*90,i/90*90,90,90)

Aug 9 2017 5:15 PM UTC

}// 108/140

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u/jick

I like this a lot.
u/kimber

Very nice
u/Cindya

Try different pallets good start

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yokljo

remix of d/3040 by u/Xen

function u(t) {

c.width=99;for(i=2e2;i--;x.fillStyle=R(i*S(t)*5,i))x.fillRect(40+T(i+t*5)*10,30+S(i+t*5)*8,X=C(t*2+i)*4,X/2),x.fillText('ylophone',55,33)

Aug 9 2017 2:52 PM UTC

}// 137/140

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u/Xen

I approve! :D lol

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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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