Top dweets of all time

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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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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FireFly

function u(t) {

f = (c, y, s) => x.fillRect(t*120, 540 + y*120, s, s, x.fillStyle = c)
f('#999', 0, 2)
f('#F00', S(T(S(T(S(t))))), 4)
f('#00F', T(C(t)), 4)

Mar 1 2017 3:02 PM UTC

}// 139/140

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Two interesting functions. T(C(x)) in particular looks a lot like a rounded triangle wave, which is pretty handy… mostly posting this as a meta-dweet/for reference. :)

u/sigveseb

perfect stuff for putting a community wiki!

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Bombo

function u(t) {

w=c.width=1920;for(i=25;i--;){k=i*i;x.fillRect(w/2+k*S(t*4)/4,w/3-i*15+S(t*4)*k/4,9+i,9+i);x.fillRect(w/2+k*S(t*4)/4,w/3+S(t*4)*k/8,4,4);}

Feb 28 2017 9:47 PM UTC

}// 138/140

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u/lionleaf

That is one tall tower

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Tosmatobeef

remix of d/1525 by u/lionleaf

function u(t) {

c.width=2e3;v='Thanks for making Dwitter!';for(i=v.length;i--;)x.font=100+'px Arial',x.fillText(v[i],i*81,540+S(t*10+i)*10)

Feb 28 2017 6:26 AM UTC

}// 123/140

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u/lionleaf

You're welcome! Fun to see activity here :)
u/sigveseb

:D

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spbyrne

function u(t) {

w=c.width=1e3;f=50;for(s=1;s<f;s++){n=t/4%1*f*s;for(i=0;i<f*2;i++)x.quadraticCurveTo(i*f-25-n,s*f*1.1,i*f-n,s*f);x.stroke();x.beginPath()}

Feb 27 2017 9:13 PM UTC

}// 138/140

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u/katkip

#waves

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irregularshed

function u(t) {

for(var h=0; h<1920; h++) {
var v=(t*60)%1080;var l=((h*h+v*v)/17)%256;x.fillStyle=R(l,l,0,1);x.fillRect(h,v,1,1);}

Feb 26 2017 6:36 PM UTC

}// 115/140

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Threw this together on my phone :)

u/SpecialAgent

beautiful!
u/sigveseb

very nice in fullscreen!
u/Tekmap

#moire

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donbright

remix of d/1399 by u/Kalanchoe

function u(t) {

r=Math.random
c.width^=0
t?o.push({X:1920*r(),Y:0,ẋ:0,ẏ:0}):o=[]
o.map(a=>(x.fillRect(a.X+=a.ẋ+=r()-0.5+S(t)/15,a.Y+=a.ẏ+=r(),15,15)))

Feb 26 2017 3:27 PM UTC

}// 135/140

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snowflakes

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u/Kalanchoe

oh, this is pretty!
u/Kalanchoe

Try setting initial y to y:-15 :)
u/iverjo

Speaking of snowflakes: https://www.dwitter.net/d/338
u/donbright

thanks. iverjo that is super cool! i wish i could figure out how to combine that with this.
u/sfz

Did it, but at 150 chars, will share remix if I can get it down to limit.
u/sfz

Eh, not the same subtlety, but this is what I've got https://www.dwitter.net/d/1479
u/sfz

New version where larger snowflaskes fall faster than smaller ones, but had to remove the random wind. https://www.dwitter.net/d/1520
u/donbright

nice
u/sfacci

confetti!
u/donbright

#particles

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Jenky

function u(t) {

n=512;r=6.28;for(i=t;i<t+r;i+=r/30){z=i+t;a=-S(i);b=-C(i);x.fillStyle=R(C(z)*n,C(z+r/3)*n,C(z+4.18)*n);x.fillRect(960+S(t)*a*n,n+b*n,9,9)}

Feb 26 2017 8:17 AM UTC

}// 138/140

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Rainbow experiment without 'hsv()'

u/donbright

this is really nice
u/sfz

purdy

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sfz

function u(t) {

for(i=1,l=255;i<l;i++)j=t%9*i,k=i*t%l,m=S(t+j),x.font=j+'px a',x.fillStyle=R(i,k,l-i,m/i),x.fillText('❖',900+j*m*S(i*j),540+j*C(t+i)*S(t-j))

Feb 26 2017 7:38 AM UTC

}// 140/140

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u/sigveseb

watch this for a while, worth the wait!
u/iverjo

Fascinating

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donbright

remix of d/1232 by u/iverjo

function u(t) {

a=2e3;c.width=a;for(i=2*a;i--;)p=S(t)*i/a+i%4/.637,d=C(p)-S(p),d>0&&x.fillRect(a/2+99*(S(p)+S(t)),i/4,99*d,1/(d+1)),x.fillStyle=R(i/9,d*a/8)

Feb 25 2017 1:54 AM UTC

}// 140/140

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u/iverjo

Nice :) Better colors than mine
u/iverjo

By saving golfing 2 characters I managed to make the twister bigger:
u/iverjo

c.width=a=2e3;for(i=2*a;i--;)p=S(t)*i/a+i%4/.637,d=C(p)-S(p),d>0&&x.fillRect(a/2+199*(S(p)+S(t)),i/4,199*d,1/(d+1)),x.fillStyle=R(i/9,d*a/8)
u/iverjo

A little more movement: c.width=a=2e3;for(i=2*a;i--;)d=C(p=S(t)*i/a+i%4/.637)-S(p),d>0&&x.fillRect(a/2+199*S(p)+399*C(t),i/4,199*d,1/(d+1)),x.fillStyle=R(i/9,d*a/8)
u/donbright

wow that is awesome!!! i really do miss how yours spins all the way around.
u/donbright

#twister