Dweets awesomed by u/innovati

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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cantelope

function u(t) {

x.globalAlpha=.1
x.fillRect(0,0,(w=960)*2,w*2)
for(i=18;i--;p=.7*i+t,x.clearRect(w+1/(Z=3+C(p))*S(p)*w,540+(i<9?.4:-.5)/Z*w,s=199/(Z*Z),s));

Apr 9 2017 12:54 AM UTC

}// 140/140

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fixed a FF bug. apparently it doesn't like the syntax Z**2

u/donbright

this has a really cool look

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cantelope

remix of d/2394 by u/Jenky

function u(t) {

t||(w=c.width=568)
with(x)onmousemove=e=>lineTo(X=e.pageX,Y=e.pageY),fillStyle=R(Y,X,Y,.2),fillRect(0,0,w,w),beginPath(stroke()),moveTo(X,Y)

Apr 6 2017 2:13 AM UTC

}// 140/140

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If you set canvas.width to client.width, you can remove the bit that fixes the mouse position. This one only works at the default width (not fullscreen) because I had to hard-code the canvas width to make room for the fade effect. Nesting stroke inside beginPath saved 1 crucial byte. :)

u/cantelope

canvas.clientWidth rather
u/cantelope

i will give 3 gold stars to anyone who can fix the initial "Y is not defined" error :D
u/magna

Since your dweet doesn't use trig, we can hijack C and S as declared variables: https://www.dwitter.net/d/2429
u/magna

Can save another 2 bytes by: R(Y,X,fillRect(0,0,w,w),.2,beginPath(stroke()),moveTo(X,Y))

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cantelope

remix of d/2392 by u/nonce

function u(t) {

k=frame,p=q=0
for(s=1;s<32;s*=2){a=1&k/2;b=1&k^a
if(!b){if(a)p=s-1-p,q=s-1-q;[p,q]=[q,p]}p+=s*a;q+=s*b
k=k>>2}x.lineTo(p<<5,q<<5),x.stroke()

Apr 2 2017 8:13 PM UTC

}// 140/140

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looks best fullscreen

u/donbright

these are great!!!

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cantelope

remix of d/2359 by u/Jenky

function u(t) {

x.globalAlpha=.1
x.fillRect(0,0,i=w=2e3,w)
if(!t)for(p=[];w--;)p.push([w*9%i,w])
p.map(v=>{v[0]+=C(t+=.2),v[1]-=S(t),x.clearRect(...v,9,9)})

Apr 1 2017 7:36 AM UTC

}// 140/140

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Experimenting with map. Might need more practice heh.

u/sigveseb

Nice style
u/donbright

love the fade

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cantelope

function u(t) {

c.width^=f=1.06;for(i=10;p=2.093*i+f,i--;)x.lineTo(940+S(p)*(s=i<5?340:700),720+C(p)*s),i%5||(x.fill(),x.fillStyle="#fff",x.beginPath(),f=0)

Mar 31 2017 5:13 AM UTC

}// 140/140

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A triforce.

u/cantelope

I'd love to see someone else's attempt at this. Feel like I did it the hard way :s
u/sigveseb

Maybe there is a Unicode triangle you can use?
u/cantelope

@sigveseb, I would worry about subtle variations in display size/position across browsers. but that's a great idea.
u/donbright

im thinking maybe some kind of sierpinski style but it wont be easy

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cantelope

function u(t) {

x.fillRect(0,0,2e3,2e3);for(i=5e3;i--;Z=130-(t*40+i)%130,s=280/Z,x.clearRect(960+1/Z*(-99+i*6e72%199)*700,540+(-70+i*8e61%140)/Z*700,s,s));

Mar 29 2017 6:05 AM UTC

}// 139/140

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u/aemkei

Whaa, this is the best starfield here, so far! Good job!
u/cantelope

Thanks aemkei! I see a couple missed opportunities tho. might try again. :)
u/tapgiles

That takes me back to... around 1995. ^^
u/cantelope

#starfield #stars

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cantelope

function u(t) {

x.save(),x.translate(960,540);for(i=99;i--;a=i*10,x.fillStyle=`hsl(${i*4-t*99},99%,50%`,x.fillRect(-a,-a,a*2,a*2),x.rotate(.02));x.restore()

Mar 28 2017 4:27 AM UTC

}// 140/140

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some color to brighten up the place

u/nonce

love it, I have been playing with tunnels that you are backing out of all day it is refreshing to see on go the other way
u/sfz

Wow, you get some cool patterns if you change the .02 to .1 thru .9
u/donbright

beautiful

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Lappi

function u(t) {

c.width=1920;x.font='9em a';
for(i=0;i<300;i++)
x.fillRect(i*5,S(i*5+t*i/200)*400+600,30,30),
x.fillText('🌈',i*5,S(i*5+t*i/200)*400+600);

Mar 26 2017 8:43 AM UTC

}// 139/140

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u/donbright

красава!
u/donbright

oops i think i mean красива

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nonce

function u(t) {

Q=210+~~(t*9)*160
U=(''+u).replace(/[^Q]+/,'')
I=U.split('\n')
N=I[~~(t*9)]
E=x.font='111px monospace'
  x.fillText(N,20,Q)

Mar 26 2017 6:03 AM UTC

}// 124/140

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u/Lazy1337

#quine

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cantelope

function u(t) {

c.width=1920;x.fillStyle="red";g=540;for(i=0;i<g;p=i-t,l=S(p)*i,Z=g-l*C(t),s=g*9/Z,x.fillRect(960+18/(Z*18)*l*S(t)*g,g+C(p)*i/Z*g,s,s),++i);

Mar 26 2017 2:54 AM UTC

}// 140/140

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u/innovati

it's like a sunflower pattern :D

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