Dweets awesomed by u/BalintCsala

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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BalintCsala

function u(t) {

c.width^=0
for(i=2;i--;)for(j=20;j--;)(x.beginPath(),x.fillStyle=R(0,0,0,K=S(J=(i+t)*3+j/2)+1),x.arc(960+C(J)*25,j*60,K*3+15,0,7),x.fill())

Apr 6 2018 9:15 AM UTC

}// 139/140

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helix thing

u/BirdsTweetCodersDweet

#DNA #helix

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AnnanFay

remix of d/7492 by u/AnnanFay

function u(t) {

c.width|=0
P.push(1+P[2*(1<<Math.log2(f++))-f])
x.fill(new Path2D('M960,540'+P.map(v=>'hv'[v&1]+'-| '[v&2]).join(s=60/t**.5)+s))}{P=[f=1]

Mar 27 2018 9:42 PM UTC

}// 137/140

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Dragon Curve - filled version

u/Xen

love it!
u/joeytwiddle

novel presentation!
u/katkip

#julia #fractal
u/donbright

now thats a good way to draw a dragon

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BalintCsala

function u(t) {

c.width=500
for(i=3;i--;)for(j=99;j--;)(x.fillStyle=`hsl(${i*120},99%,${60+(H=S(t*2+(j/20))*9*(1-j/120))}%`,x.fillRect(50+j,50+i*20+H,1,23))

Mar 26 2018 4:14 PM UTC

}// 140/140

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Waving flag (of something) with shading

u/joeytwiddle

Nice work! I managed shading and colours before, but not both together. d/3161
u/iverjo

#flag

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jylikangas

function u(t) {

A=r=>x.fill(x.arc(960+R*C(t),540+R*S(t),r,0,7))
f%2&&(t+=3)
x.beginPath(A(R=180))
x.fillStyle='#'+(f++%2?999:111)
A(45)}{f=0

Mar 26 2018 5:01 AM UTC

}// 124/140

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Animated Yin Yang

u/jylikangas

t+=f%2*3 to save 3 more bytes
u/jylikangas

R=180+f%2*3 to add an outline
u/joeytwiddle

#yinyang

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BalintCsala

function u(t) {

[..."ᥐ㈼娼傴䯈䯡擡渼阼雈꿡좾꿈꼼휼휣㈣ᥐᜳ⌥〚㼐伈怃爀萀锂꜇뜎옗퐣沈濾훔짟뫩꫱駶蟹蟹痹擷勲䋫㏢◖᫉ႺࢪΙuɤݒโᜳ"].map((i,j)=>(x.lineTo((A=i.charCodeAt())>>8,A&255)))
x.stroke()

Mar 25 2018 1:21 PM UTC

}// 133/140

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π in a circle

u/lionleaf

Pi in a pie?

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New_Core

remix of d/7293 by u/New_Core

function u(t) {

c.width|=V=960,H=560
for(j=99;j--;x.beginPath())for(i=5;i--;x.stroke())Z=C(a=i*1.57+t+5*S(t+j/99))+8,x.lineTo(V+(S(a))/Z*V,H+(6-(j/8))/Z*H)

Mar 25 2018 11:00 AM UTC

}// 139/140

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u/Xen

very slick
u/joeytwiddle

#twister

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jylikangas

remix of d/7410 by u/fujimotos

function u(t) {

for(c.width=i=250;i--;x.fillStyle="#"+i*19)x.fillRect(0,0,6,-49,h=(H=i/9-t)<0&&H,x.setTransform(K=C(z=h>-1?h:-1),-S(z),S(z),K,99*(H+2),99))

Mar 25 2018 7:24 AM UTC

}// 139/140

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Fujimotos original now with colors as suggested

u/fujimotos

The use of x.fillStyle here is very very clever. I love it.
u/fujimotos

#dominoes

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BalintCsala

function u(t) {

for(X=99;X--+200;)for(Y=99;Y--+99;)((f=(n,x,y)=>n&&x<2&&y<2&&f(n-1,x*x-y*y+U,2*x*y+V))(99,U=X/99,V=Y/99)===0&&x.fillRect(X+200,Y+99,1,1))

Mar 24 2018 10:13 PM UTC

}// 137/140

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Mandelbrot set

u/iverjo

#mandelbrot #fractal

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alien

function u(t) {

c.width=w=320
for(i=30;i--;x.stroke())for(j=20;j--;x.fillRect(C(t)*i*5+w/2,S(.1*i*t)*j*5+w/4,2,2)){x.fillStyle=R(i**j,0,C(j*i)*w,w)}

Mar 24 2018 10:01 PM UTC

}// 138/140

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BalintCsala

remix of d/7404 by u/xem

function u(t) {

c.width=innerWidth;c.onmousemove=e=>B.push([e.x-X,e.y-Y,X=e.x,Y=e.y])
B.map(i=>x.fillText("⚫",i[2]+=i[0],i[3]+=(i[1]+=0.1)))};{B=[X=Y=0]

Mar 24 2018 9:12 PM UTC

}// 136/140

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u/iverjo

#interactive

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