Dweets awesomed by u/systemwizard

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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yokljo

remix of d/8774 by u/Feiro

function u(t) {

with(x)for(k=2e3;k--;beginPath(fillStyle="#0001"))arc(960,540,k/4,v=k%4*1.57+S(t*3-k/280)+t,v+.2),strokeStyle=R((S(t)+2)*50),stroke()

Jun 28 2018 12:55 PM UTC

}// 133/140

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u/firegodjr

Excellent gradients!

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Bugsy

function u(t) {

for(c.width|=r=999;--r;x.lineTo(960+C(r+t)*a,540+S(r+t)*a))a=r/2
x.stroke()

Jun 16 2018 4:32 PM UTC

}// 75/140

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The graph r=theta spinning around the origin. 65 characters to play with, so there's lots of remixing potential. Try messing around with the trig functions, it leads to some fun results

u/iverjo

Go fullscreen, stare at the center for 30 seconds, then look away from your screen (e.g. look at your keyboard). #opticalillusion
u/iverjo

#short

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vincent

function u(t) {

r=Math.random
for(a=2e3;a--;x.fillRect(a,b,1,1))_=r(b=r()*1000)*200>Math.hypot(a-1960,b-40)-23,x.fillStyle=R(s=(_?7:r()+2)*4,s,220+_*r()*20)

Jun 7 2018 2:20 PM UTC

}// 140/140

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Xen

remix of d/8252 by u/prplz

function u(t) {

r=Math.random
for(i=1e3;i--;x[S(((22-y)**2+(13-z)**2)**.2-t*C(t/i))**5>.2?'clearRect':'strokeRect'](y*T,z*T,9,T=44))y=r()*T,z=r()*T

May 28 2018 12:38 PM UTC

}// 131/140

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little test

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DataMeta

remix of d/8233 by u/DataMeta

function u(t) {

c.width|=0;p=Math.PI;x.lineWidth=60;for(i=1;i<24;i++){x.beginPath();x.arc(960,540,50+(i*60)+S(t/p*i)*60,t+(i*p)+S(t-i),t+i**i);x.stroke()}

May 28 2018 5:04 AM UTC

}// 138/140

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u/iverjo

The innermost part looks like a bit of the Revision logo some of the time
u/DataMeta

Had to look up what that logo looks like, but yeah you're right

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prplz

remix of d/8154 by u/Xen

function u(t) {

r=Math.random
for(i=666;i--;x[S(((22-y)**2+(13-z)**2)**.35+t)**2>.8?'clearRect':'strokeRect'](y*T,z*T,T=44,T))y=r()*T,z=r()*T

May 26 2018 12:52 PM UTC

}// 125/140

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Thanks Xen for the strokerect, it makes really cool textures

u/firegodjr

Looks like pencil crosshatching!

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kcsongor

function u(t) {

c.width=1920;i=48;while(i-->0)for(j=0;j<27;j++){r=i|j+t*80;d=40;x.fillStyle=R(S(r*(S(t)+1)/10)*200,C(r)*100,100);x.fillRect(i*40,j*40,d,d)}

May 20 2018 10:06 PM UTC

}// 139/140

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u/Xen

lots'a style
u/DataMeta

Looks like what going hot sim into the matrix feels like. Ultra cool

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Xen

remix of d/8153 by u/prplz

function u(t) {

r=Math.random
for(i=1e3;i--;x[y+C(t)*T&8^z+S(t)*T&8?'fillRect':'strokeRect'](y*T,z*T,T=44,T))y=r()*T,x.fillStyle=`hsl(${z=r()*T},70%,39%)`

May 20 2018 5:41 PM UTC

}// 138/140

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Shoutz 2 prplz

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cagr30

function u(t) {

for(x.fillRect(0,0,2e3,2e3),W=960,j=99;--j;)for(i=16;i--;x.clearRect(W+S(p=.39*i+j/4-6.03*V)/Z*W,540+C(p)/Z*W,s=99/Z,s))Z=j-t*6+(V=(t*6)|0)

Apr 21 2018 7:32 PM UTC

}// 139/140

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u/iverjo

#tunnel

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p01

remix of d/7215 by u/jylikangas

function u(t) {

for(c.width=i=W=99;i--;)for(j=0;j++<W;x.fillRect(i,j,1,~z))x.fillStyle=R(z=((d=700/j)*i/W+C(t)&d+t&7)*W/d,z*4,W);x.fillText('🐑',-9*C(t),40)

Mar 14 2018 10:10 PM UTC

}// 139/140

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Tuulian Minecraft: Sheep edition

u/jylikangas

Tuulia approves! :) Thanks!
u/sigveseb

:D:D:D
u/iverjo

#minecraft
u/alien

How does this work omg!!
u/Conjuror

love it and it is cool

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