Hot dweets by u/pavel

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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pavel

function u(t) {

for(c.width=480,x.rotate(X=Y=q=.785),r=6;r--;X+=f(0),Y+=f(2))R=1<<r,x.strokeRect(X+265-R,Y-74-R,2*R,2*R),f=n=>R*Math.atan(16*C(t+(n-r%2)*q))

Dec 23 2018 9:53 AM UTC

}// 140/140

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Squares #beesandbombs

u/katkip

So smooth!

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pavel

function u(t) {

eval(unescape(escape`睩瑨⡸⥦潲⡩㵣⹷楤瑨簽栽ㄮ㔷〸㭪㵩ⴭ㸾㔻獴牯步⠩⥳整呲慮獦潲洨㤬〬〬㤬⡩☳〩⨸ㄬⴭ横ㄶ㈩Ɫ敧楮偡瑨⡲潴慴攨栯⠱⬱改⨪匨琫⡩㸾ㄩ⨨樫ㄩ⤩⤩ⱡ牣⡰㵩┲⨱㠭㤬瀬㤬愽㈪株椬愫栩`.replace(/u(..)/g,"$1%")))

Dec 20 2018 12:45 AM UTC

}// 132/140

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u/katkip

Cool
u/magna

#truchet
u/pavel

with(x)for(i=c.width|=h=1.5708;j=i-->>5;stroke())setTransform(9,0,0,9,(i&30)*81,--j*162),beginPath(rotate(h/(1+1e9**S(t+(i>>1)*(j+1))))),arc(p=i%2*18-9,p,9,a=2*h*i,a+h)

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pavel

function u(t) {

for(c.width|=i=16,x.scale(2,2);i--;x.moveTo(480,0),x.arc(480-r*S(a=C(40*t/r**.5)),r*C(a),r/16,a-11/7,9))r=4e4/(9+i)**2;x.stroke();x.fill()

Dec 20 2018 7:18 AM UTC

}// 138/140

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#pendulum #waitforit

u/katkip

Nice
u/cantelope

can save a byte by nesting x.fill(x.stroke())
u/katkip

It's better than d/6440

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pavel

function u(t) {

for(w=i=c.width|=h=Math.PI/2;i--;x.fillRect(w/2+r*C(i+t),(i<w/3?w/3:i)/2+r/2*S(i+t)*S(t),4,10))r=(i<w/2?i:w-i)/2/C(i%h-h/4-(i%h>h/2)*h/2)

Dec 19 2018 10:57 PM UTC

}// 137/140

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Diamond

u/joeytwiddle

#model
u/f8f82804

#d3

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pavel

function u(t) {

eval(unescape(escape`睩瑨⡸⥦潲⡣⹷楤瑨簽椽㌸㐻樽椭ⴾ㸵㭳瑲潫攨⤩景爨獥瑔牡湳景牭⠹ⰰⰰⰹⰨ⡩☲㠩⵪┲⨲⤪㠰Ⱝ⵪⨱㘰⤬牯瑡瑥⡩⨳㔵⼲㈶⤬扥杩湐慴栨欽㌩㭫ⴭ㬩汩湥呯⠳ⴳ⩫ⰹ⬨㈭欥㈩⨨㌭㘯⠱⬳攲⨪匨㌪琩⤩⤻`.replace(/u(..)/g,"$1%")))

Dec 20 2018 12:41 AM UTC

}// 138/140

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u/katkip

Beautiful
u/katkip

Beautiful
u/pavel

with(x)for(c.width|=i=384;j=i-->>5;stroke())for(setTransform(9,0,0,9,((i&28)-j%2*2)*80,--j*160),rotate(i*355/226),beginPath(k=3);k--;)lineTo(3-3*k,9+(2-k%2)*(3-6/(1+3e2**S(3*t))))

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pavel

remix of d/11472 by u/cantelope

function u(t) {

for(k=c.width|=0;j=--k>>7;x.lineTo(960*(z+4*S(t)+.43*d*((k&120)-62)+S(a))/z,1e3/z))d=.5-(j+4*t&1),z=j+.6-4*t%1+C(a=k%8*d*2.1)*2/3;x.stroke()

Dec 18 2018 11:22 PM UTC

}// 140/140

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k=[4 bits for y][4 bits for x][3 bits for hexagon vertex]

Show more comments…
u/pavel

16*16*8=2048~=1920 so using width
u/pavel

.43~=3**.5/4, 2.1~=2*Math.PI/3
u/pavel

120=0b1111000 so k&120=x*8
u/pavel

I'm using a single stroke and no moveTo. This is a single curve, just lined everything up.
u/pavel

d is horizontal offset, even rows are offset from odd rows. Using +4*t&1 to explicitly cycle the animation every second instead of implicitly cycling every 2 seconds. Longer cycle leads to z<0 and glitches or hexagons that don't reach the camera.
u/magna

Wow!
u/aleamb

awesome!!!
u/pavel

#uncompressed with one plane

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pavel

remix of d/11455 by u/pavel

function u(t) {

for(r=c.width|=0;--r;)x.stroke(p=new Path2D,p.arc(960,540,r,a=(r+~~(99*t)-t/9)*5**.5/2%(2*Math.PI),a+(x.lineWidth=32)/r))

Dec 19 2018 1:13 AM UTC

}// 121/140

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Black Hole

u/pavel

Deleting %(2*Math.PI) works in Chrome but not in Safari.
u/pavel

Notice that the radius does not change with time. The inward motion is achieved by drawing a smaller radius square next to where the larger radius square was a frame ago.
u/pavel

If the squares were numbered you'd see that the numbers jump around every frame.
u/pavel

I've made an explanation dweet d/11488

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pavel

remix of d/11487 by u/pavel

function u(t) {

for(r=c.width|=0,x.font='30px"';--r;)x.fillText(r,960+r*C(a=(r+~~(99*t)-t/9)*5**.5/2),540+r*S(a))

Dec 19 2018 1:24 AM UTC

}// 97/140

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Explanation of d/11487

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pavel

remix of d/11463 by u/cantelope

function u(t) {

with(x)for(c.width|=i=6,scale(9,9),q=C(4*t);i--;stroke(),fill())moveTo(X=64+17*i,0),arc(X-60*S(a=(q>0?i:i-5)?0:q),60*C(a),8,a-Math.PI/2,9)

Dec 18 2018 12:32 AM UTC

}// 138/140

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u/cantelope

ah! of course. i knew there had to be an easier way ;P
u/katkip

Haha nice
u/iverjo

#newtonscradle
u/pavel

For a more realistic look replace (q>0?i:i-5)?0:q with (q>0?i:i-5)?q/50:q

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pavel

function u(t) {

with(x)for(j=512;j--;fill())for(beginPath(l=3);l--;arc(325*((j>>6)+j%2/3)+r*S(9*t),j%8*165,r*4,a=(l+j/2%1)*2.09,a))fillStyle=R(r=j&56,r*4)

Dec 17 2018 2:13 AM UTC

}// 138/140

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u/magna

Nice!
u/cantelope

supercool

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