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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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donbright

remix of d/6294 by u/nickd3000

function u(t) {

Q=(x,y)=>x*x+y*y
for(i=N=128;i--;)for(j=N;j--;)B=Q((半=64)-i,半-j-S(t/3)*半),G=Q(半-i-C(t)*半,半-j),x.fillStyle=R(B%G,G%B),x.fillRect(i*8,j*8,8,8)

Jan 23 2018 4:35 AM UTC

}// 140/140

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note to future self... this is some kind of weird combination of interference patterns between waves, and circle-squares fractals ....to see whats going on, start out with fillstyle=R(B%256,0,0) then work from there.

u/donbright

note to future self... this is some kind of weird combination of interference patterns between waves, and circle-squares fractals ....to see whats going on, start out with fillstyle=R(B%256,0,0) then work from there.
u/donbright

in other words, it's not drawing the "lines of force", those lines are an artefact of the remainders of the 'quadrance' (squared distance) between the two black balls

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ellisk1

function u(t) {

c.width|=z=4+C(t);r=89;f=a=>x.lineTo(250*z+r*C(q=a-S(t+a)/3)*z,99*S(2*t)+r*z*(1+S(q)));f(0);f(1.3);f(2);f(2.5);f(0);f(2);r=99;f(2);x.fill()

Jan 23 2018 4:09 AM UTC

}// 139/140

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Flying Paper Airplane

Show more comments…
u/donbright

:)
u/sigveseb

Nice idea
u/trupples

Woah
u/aleamb

Great idea. Very nice dweet.
u/Qwitter

Cool
u/Xen

but is it flying towards or away?
u/ellisk1

Good question! It's up to the viewer haha
u/mrbhawk

This is my favourite dweet ever.
u/aleamb

the most elegant dweet ever seen
u/hollo47

#paperplane #elegant
u/joeytwiddle

#model

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sj_

function u(t) {

c.width=1920;for(j=6;j<8;j++){for(i=1;i<11;i++){x.fillStyle=R(241,219,20,1-.1*i);x.fillRect(1180+S(t*j)*50*i,90+400/(i*3),i*7,100+i*i*10)}}

Jan 23 2018 2:35 AM UTC

}// 139/140

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Butterfly 2

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aleamb

function u(t) {

w=c.width=127;for(a=w*w;a--;)e=a&w,g=a/w,r=3e3/(f=Math.sqrt((p=e-62)*p+(s=g-32)*s)),x.fillStyle=(f-t*w%w>0?R(r-20):R(r)),x.fillRect(e,g,2,2)

Jan 23 2018 1:47 AM UTC

}// 140/140

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u/joeytwiddle

Spooky

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mr_daemon

function u(t) {

c.width=1080;for(i=0;i<10;i++){for(j=0;j<40*(2+S(i+8*t)*C(i+t))*i;j+=10){x.fillStyle=R(j,850-j,0,1),x.fillRect(1000-i*99,500-j/2,75,35)}}

Jan 23 2018 12:05 AM UTC

}// 137/140

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gurke

remix of d/5777 by u/sigveseb

function u(t) {

t&&a<1920||(a=b=q=0,p=t*77%23+4,h+=20)
x.font='9em"'
x.fillText('🅱',a+=p,b)
b+=q++
b>930&q>0?q*=t%1/9-.9:0};{h=0

Jan 22 2018 11:55 PM UTC

}// 112/140

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FrenchToast

remix of d/6330 by u/FrenchToast

function u(t) {

c.width^=0
x.globalCompositeOperation='xor'
for(i=200;i--;){x.fillRect(1920*S(i/600)+1920/3,1080*(i/200),600*C(i/50+10*t),200*S(i/70))}

Jan 22 2018 11:54 PM UTC

}// 135/140

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ruminativeperson

function u(t) {

c.width=1922 //clear the canvas
 for(i=0;i<17;i++)
x.fillRect(i*S(t)*240+i,20+i*C(t)*23+i,50*i*T(t+4e6),281*i*T(i*2*t)) // draw 50x10 rects

Jan 22 2018 11:32 PM UTC

}// 139/140

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tmcw

function u(t) {

for(i=0;i<200;i++) {
  x.fillText('╲╱'[Math.round(Math.random())],0,0);
  x.translate(10,0)
}
x.translate(-2000, 10)

Jan 22 2018 11:16 PM UTC

}// 116/140

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u/sigveseb

Classic maze, nice!
u/Qwitter

Zoom to play!
u/firegodjr

#charmatrix

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@no_identd

remix of d/6364 by u/@no_identd

function u(t) {

_=48
for(i=0;i<_;i++)for(j=0;j<_;j++){r=t+(i-_)*(j-_/2)/_
$=S(r)
x.fillStyle=R($*255,t+S(r^5)*255*$,j**$^7)
x.fillRect(i*_,j*_-$*_,_*2,_*2)}

Jan 22 2018 10:59 PM UTC

}// 140/140

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u/joeytwiddle

Waves look good for surfing ... in a lava-proof wetsuit