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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Current theme challenge: #Food

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gabrielsroka

remix of d/39 by u/sigveseb

function u(t) {

c.width=1920
with(x)for(translate(960,540),rotate(t/2),i=s=99;a=s*s/(s-i-t%s),i--;)rotate(S(t)/s),fillStyle=R(a/9),fillRect(b=-a/2,b,a,a)

Mar 5 2017 12:46 AM UTC

}// 137/140

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a few bytes shorter, and fullscreen looks better with c.width=1920

u/iverjo

#tunnel

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shoguning

function u(t) {

c.width=1920;
for(i=0;i<10;i++)
x.fillRect(800+C(2*t-i/5)*600, 400+400*S(4*t-i/3.), 50/i**0.5, 50/i**0.5)

Mar 4 2017 7:05 PM UTC

}// 105/140

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u/recursive

nice
u/joeytwiddle

This reminds me of a certain arcade game dragon
u/lionleaf

#organic

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donbright

remix of d/1857 by u/donbright

function u(t) {

w=128,c.width=2*w;for(i=w;i--;)for(j=w;j--;)c=S(t/3)*i*i+S(t/4)*j*j+S(t/5)*2*i*j,c=(c%w+w)%w,x.fillStyle=R(c,c,c),x.fillRect(64+i,8+j,1,1)

Mar 4 2017 8:07 AM UTC

}// 139/140

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As with 1857 this is an attempt to show the relation between Binary Quadratic Forms and the Circles and Squares pseudo fractal and Moiré pattern. This takes the basic ingredients of the Quadratic Form, x*x, y*y, and 2*x*y, and mixes them together, but slowly varies the amount of each ingredient over time with the Sine function. It is possible to see how all variations of the Quadratic Form result in similar patterns, transitioning from crcles to ovals to hyperbola patterns. Inspiration from this site and NJ Wildberger's rational geometr, Paul Bourke's http://paulbourke.net/fractals/circlesquares/ and Santiago Zubeta

u/donbright

https://twitter.com/zubie7a
u/SpecialAgent

wow! fascinating and purty :)

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Memis

function u(t) {

for(i=0;i<8;i++){x.fillStyle=`hsl(${S(t/1.5)*255},100%,50%)`;x.fillRect(S(t*3.1415/4)*500+950,S(i*t/2)*500+500,5,5)}

Mar 4 2017 12:56 AM UTC

}// 116/140

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sfacci

remix of d/1093 by u/sfacci

function u(t) {

c.width=1920;
for(i=0;i<400;i++)for(j=0;j<6;j++){
x.fillRect(300*(j-S(t-i/j)),
150*(j-C(j-i))*j/i*t,
10,10)}

Mar 3 2017 9:49 PM UTC

}// 108/140

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sfz

remix of d/1839 by u/sawaxon

function u(t) {

A=p=>p>0?p:-p
m=49
l=40
for(j=l;j--;)for(i=l;i--;)x.fillStyle=R(l*A(S(t-j)+i/6),S(t/j)*l*j/(i/9+1),m*S(i)*C(t)+9*j),x.fillRect(i*m,j*m,m,m)

Mar 3 2017 7:25 PM UTC

}// 139/140

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u/donbright

very chilled out

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ClayCowgill

function u(t) {

for(j=2e3;j--;x.fillRect(t*60,j,1,1,x.fillStyle=`hsl(${C(k)*78},99%,50%)`))for(a=t/8-2,b=j/540-1,k=9;k--&&a*a+b*b<4;a=c)c=a*a-b*b-.7,b=2*a*b

Mar 3 2017 5:28 AM UTC

}// 140/140

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Really wants ~4 more chars... for(j=2e3;j--;x.fillRect(t*60,j,1,1,x.fillStyle=hsl(${C(k/12)*99},99%,50%)))for(a=t/8-2,b=j/540-1,k=49;k--&&a*a+b*b<4;a=c)c=a*a-b*b-.7,b=2*a*b

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mihte

function u(t) {

c.width=1920
x.font='170px Impact'
for(s=0;s<5;s++)x.fillText("Dweet ❤️️",t*500%1920,240+s*180),x.fillStyle=R(C(t)*128+128,1+s*80,20+s*20)

Mar 3 2017 4:46 AM UTC

}// 138/140

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iverjo

remix of d/1763 by u/New_Core

function u(t) {

if(!t)a=new(window.AudioContext)(),o=a.createOscillator(),o.type='square',o.connect(a.destination),o.start(a);o.frequency.value=800*S(t)

Mar 2 2017 6:43 PM UTC

}// 136/140

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Remove the a in o.start(a) to start the anoying thing xD

u/iverjo

#bartjs
u/iverjo

Warning: The sound may be louder than you expect
u/iverjo

Looks like it doesn't work in Firefox
u/iverjo

#audio
u/joeytwiddle

#police

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FireFly

function u(t) {

t || x.translate(X=960, 540)
x.fillStyle = 'hsl('+t*80+',80%,50%)'
x.drawImage(c,9,9)
x.fillRect(t*70%X, 1, 32, 24)
x.rotate(4)

Mar 2 2017 1:53 PM UTC

}// 127/140

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Fast-paced kaleidoscope