Dweets awesomed by u/prplz

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: #ScaryMovies

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pavel

function u(t) {

for(c.width=i=960;--i;x.ellipse(480,270-56*(j%2-.5)*y,r=32*(64-y*y)**.5,r/2,0,a=(j+t%1)/7,a+!j*7))j=i>>4,y=i%16-8;x.stroke()

Apr 10 2019 8:35 AM UTC

}// 124/140

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#wireframe #sphere

u/f8f82804

#d3
u/Xen

Nice!
u/lionleaf

Nice one! #globe
u/pavel

I use 44 longitude lines so the arc angle between adjacent two is 2*pi/44 which is approximated by 1/7 to 4 decimal places.
u/pavel

Using the famous pi ~ 22/7 approximation.

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Jezza

function u(t) {

c.width|=0;for(i=0;i<9;i++)x.fillRect(400+i*100+S(t)*300,400,50,200);x.globalAlpha=0.3;for(X=12;X--;)x.drawImage(c,T(X+t)*200,T(X-t)*200);

Apr 10 2019 7:55 AM UTC

}// 138/140

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#default

u/magna

Awesome! I'm a fan of defaults!

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pavel

function u(t) {

for(a=b=u=c.width|=i=0;i++<99*t;x.fillRect(960+800*C(a+t)*S(b)/z,540+800*C(b)/z,s=20/z/z,s))a+=C(u+=i**.9%1-.5)/69,z=2+S(a+t)*S(b+=S(u)/69)

Apr 10 2019 1:23 AM UTC

}// 139/140

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Wiggly boy

Show more comments…
u/magna

Awesome!
u/DataMeta

Cool!!
u/joeytwiddle

Bloody brilliant #sphere #perspective
u/katkip

this will get to the top
u/katkip

#d3
u/iverjo

Wow!
u/donbright

#randomwalk

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katkip

function u(t) {

s=10;for(i=499;i--;)x.fillStyle=`hsl(${i*t*t},99%,50%)`,x.beginPath(),x.arc(960+C(i*t/18)*t*99,540+S(i*t/18)*t*99,9+i/5,0,7),x.fill()

Apr 2 2019 5:07 PM UTC

}// 133/140

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rodrigo.siqueira

remix of d/12952 by u/rodrigo.siqueira

function u(t) {

c.width+=0
for(i=3e3;i--;){
 K=(i&2)-3*C(t)
 X=S(i)*2+S(2*i+t)*K
 Y=C(i)*2-C(2*i+t)*K
 x.fillRect(960+X*80,500+Y*80,5,5)
}

Apr 2 2019 11:54 AM UTC

}// 123/140

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Smooth transitions on the Trefoil endless knot

u/katkip

WOW

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robbyg

remix of d/12870 by u/vinca

function u(t) {

c.width|=0,Z=16
for(Y=V=34,A=.2;V>-Y;V--)for(H=X=60;H>-X;H--)T(A*H)*T(A*V)>S(A*H*A*V*S(t))&&x.fillRect(H*Z+X*Z,V*Z+Y*Z,Z,Z)

Mar 28 2019 3:00 AM UTC

}// 123/140

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u/katkip

Wow

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New_Core

function u(t) {

for(c.width|=i=12;i--;x.fillText('🚮',960-300*S(a=(S(t+j/2)+9%v)%v+i%2*v)/2+120*C(a),j*254+99*S(t),300*S(a)))j=~~(i/2),x.font="6cm'",v=1.58

Mar 27 2019 9:22 PM UTC

}// 138/140

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u/prplz

~~(i/2) can be i>>1
u/jylikangas

Clever use of maxWidth!
u/katkip

Wow
u/user0

n

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vinca

function u(t) {

for(0==t&&(c.width=960,x.translate(480,270),A=.03),X=480,Y=(0|50*t)%540-270;X>=-480;--X)T(A*X)*T(A*Y)>S(A*A*X*Y)&&x.fillRect(X,Y,1,1)

Mar 24 2019 8:00 AM UTC

}// 133/140

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Show more comments…
u/katkip

This is #beautiful! How did you discover this?
u/Xen

Love it!
u/magna

WOW!
u/aleamb

dude!
u/vinca

I found a formula using this tool https://imgur.com/GKPVSJd
u/aleamb

#math #inecuation
u/robbyg

Awesome stuff, and thanks for sharing the tool! 111 bytes (but with no slow reveal): if(!t)for(Y=V=270,A=.03;V>-Y;V--)for(H=X=480;H>-X;H--)T(A*H)*T(A*V)>S(A*A*H*V)&&x.fillRect(H*2+X*2,V*2+Y*2,2,2)

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tomxor

function u(t) {

c.width=384;for(i=800;i--;)"߿蠀￱衁	衂	衂	蠂ŉ蠂蠂䅉蠂␉蠂⠉蠂⠉蠂␉蠂 衂䅉衂䂉衂腉衂	衂	衂	衂￱蠁蠀߿".charCodeAt(i>>4)>>i%16&1&&x.fillRect(180+(i>>5),96|i&31,1,1)

Mar 18 2019 12:51 AM UTC

}// 140/140

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128k Sad Mac #mac #retro

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Jezza

remix of d/12736 by u/Jezza

function u(t) {

x.fillRect(0,0,1920,1080);X=C(t/2)*6+16;Y=S(t/2.1)*6+9;x.globalAlpha=.05;for(i=99;i--;)Z=S(Y),Y+=C(X),X+=Z,x.clearRect(X*60,Y*60,5,5)

Mar 15 2019 12:30 AM UTC

}// 133/140

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Shoutout to @katkip for #attractor rabbit hole.

Show more comments…
u/tomxor

wow
u/katkip

Nice
u/aleamb

yeah!
u/jick

Wow!
u/lionleaf

That's amazing!
u/lionleaf

#grid
u/sigveseb

Rad
u/vain

How? So beautiful and impressive

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