Dweets awesomed by u/joeytwiddle

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: #Food

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dh7

function u(t) {

c.width+=0;for(i=-2;i<2;i+=.05)for(j=-4;j<4;j+=.05){
k=5*C(j/2)*C(j/2)+S(3.3*j-5.4*t)*C(4.2*i-4.1*t);x.fillRect(j*240+960,-i*240+540,k,k)}

Mar 4 2017 12:00 AM UTC

}// 140/140

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u/iverjo

Nice halftone smoke. This technique deserves more attention, in my opinion

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veubeke

function u(t) {

t?c.width^=0:a=b=e=f=1;a+=e,b+=f;b>>3||x[k=b*8+a]&&x[k]--?f=-f:a>>3?e=-e:0;for(i=64;i--;)t?x[i]|i==k&&x.fillRect(i-i%8,i%8*8,8,8):x[i]=i>>5

Mar 3 2017 5:33 PM UTC

}// 139/140

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Turns out you can’t fit Breakout into 140b :D

u/iverjo

+1 for good effort :D

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New_Core

function u(t) {

c.width=1920;for(i=16;i--;)x.ellipse(1e3+300*S(t+i*.1),500+50*C(t+i*.1),160*S(-i*.5)+160,50*S(i*.1)+5,1.6+.5*S(t*.5),9.5,0,6.3);x.stroke();

Mar 3 2017 3:31 PM UTC

}// 139/140

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Show more comments…
u/sfz

wow creative!
u/sfz

reduced it by about 15 bytes in case you want to try to do something else with the extra room: c.width|=0;for(i=16;i--;)x.ellipse(1e3+300*S(t+i/9),500+50*C(t+i/9),160*S(-i/2)+160,50*S(i/9)+5,1.6+S(t)/2,9,0,7);x.stroke()
u/iverjo

So good!
u/sigveseb

is that a pseudo-3D fish? super nice!
u/donbright

marvellous
u/magna

WAAAAT
u/SpecialAgent

Magnificent depth!
u/joseprio

Really impressive :)
u/Kalanchoe

Amazing!
u/ArtsyBiker1

WHOA
u/gautjac

beautiful
u/21medals

Reduced it ±20 bytes and added beginPath() without changing any values:
u/21medals

for(c.width|=i=16;a=i--/10;x.stroke())x.beginPath(),x.ellipse(1e3+300*S(t+a),500+50*C(t+a),160*S(-i/2)+160,50*S(a)+5,1.6+S(t/2)/2,9.5,0,6.3)
u/New_Core

#fish
u/joeytwiddle

#model
u/Cloud

https://www.dwitter.net/d/17352
u/vain

incredible 3d fish

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AaronGiles

function u(t) {

c.width|=0;s=200*(1-C(t%1));x.scale(s,s);x.globalAlpha=1-s/90;x.textAlign='center';x.font=`30pt Arial`;x.fillText(t|0,960/s,540/s+17)

Mar 3 2017 11:27 AM UTC

}// 133/140

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u/joeytwiddle

#numbers

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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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AaronGiles

function u(t) {

t||(x.translate(w=960,540),x.rotate(2));j=S(t);x.rotate(j/40);x.drawImage(c,0,-w);x.fillStyle=`hsl(${j*360},99%,50%)`;x.fillRect(w*j,0,9,w)

Mar 3 2017 9:21 AM UTC

}// 139/140

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SpecialAgent

remix of d/1755 by u/SpecialAgent

function u(t) {

c.width^=0;r=60;for(n=6;n--,q=r*[1,2,3,5,6,9][n],d=t/[1,2,3,4,5,6][n];)x.arc(r*9,r*9,q,1,9),x.stroke(),x.fillRect(r*9+q*C(d),r*9+q*S(d),9,9)

Mar 3 2017 7:50 AM UTC

}// 140/140

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The approximate orbits of the newly discovered Trappist-1 system, three of the seven planets lie in the habitable zone. The innermost planet is not shown here.

u/sfz

I love these space science ones!
u/SpecialAgent

The outermost planet circles the sun around every 20 Earth days, that is a very tight year!
u/donbright

outstanding!

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btc@codebro.com

function u(t) {

go=(i,j)=>{x.fillStyle=R(S(i)*255);x.fillRect(i*50+(S(t)*60),500+(S(t*i)*200), j, j)};c.width=1920;for(i=1;i<50;i++){go(i,25);go(i*1.5,50);}

Mar 3 2017 12:17 AM UTC

}// 140/140

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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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ClayCowgill

function u(t) {

f=frame;for(j=1080;j--;x.fillRect(f,j,1,S(k),x.fillStyle=R(f/9,99)))for(a=f/500-2,b=j/500-1,k=35;k--&&a*a+b*b<4;a=c)c=a*a-b*b-.7,b=2*a*b+.55

Mar 2 2017 10:45 PM UTC

}// 140/140

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I just can't get the color version down to size! i=frame;for(j=1080;j--;){a=i/500-2;b=j/500-1;for(k=75;k--&&a*a+b*b<4;)c=a*a-b*b-.7,b=2*a*b+.55,a=c;x.fillStyle=hsl(${C(k/9)*255},99%,50%);x.fillRect(i,j,1,1)}

Show more comments…
u/iverjo

Rad!
u/sigveseb

and yet the colors on this one are already beautiful!
u/sigveseb

btw you can do t*60 instead of frame
u/ClayCowgill

Thanks! That's one more saved! ;-)
u/ClayCowgill

(BTW, this is mostly based on a Mandelbrot set dweet that I can no longer find. (This is part of the Julia set instead.)
u/FireFly

Halfway there (150): for(j=2e3;j--;x.fillRect(t*60,j,1,1,x.fillStyle=hsl(${C(k/9)*255},99%,50%)))for(a=t*.12-2,b=j/500-1,k=75;k--&&a*a+b*b<4;a=c)c=a*a-b*b-.7,b=2*a*b+.55
u/FireFly

t*.12 is approx. t/8 if you're fine with it being somewhat off-centre.
u/ClayCowgill

Nice! Just six over now... for(j=2e3;j--;x.fillRect(t*60,j,1,1,x.fillStyle=hsl(${C(k/9)*99},99%,50%)))for(a=t/8-2,b=j/500-1,k=99;k--&&a*a+b*b<4;a=c)c=a*a-b*b-.7,b=2*a*b+.5
u/New_Core

the first 99 number can be put as k so still 5 to go
u/magna

You can omit the closing parenthesis of hsl() because browsers are resilient to bad CSS syntax
u/ClayCowgill

Good tips! Thanks!
u/ClayCowgill

Thanks for the help-- managed to get a high resolution/high color version going with the suggestions. :) https://www.dwitter.net/d/1896
u/katkip

Genius

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