Top dweets by u/farter

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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farter

function u(t) {

t||(f=s=1);s<<8&f||s>>24&255?(f|=s,s=1<<new Date,f>>24==-1&&(f<<=8)):s<<=8;c.width=63;for(i=32;i--;)(f|s)&1<<i&&x.fillRect((i&7)*8,i&~7,7,7)

Mar 4 2017 11:43 AM UTC

}// 140/140

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Show more comments…
u/parabola

Awesome!
u/iverjo

Tetris! Any way we could slow it down?
u/FireFly

Very nice! (i&7)*8 → i%8*8 should save you two bytes, btw
u/farter

@iverjo in fact at first i tried, but if it's slowed down, you'll see some wrong but minor behavior, due to saving bytes. and @FireFly thx, and the two bytes allowed me to solve one of them!
u/Renaud___

I am trying to do anything like that since 4 days ... with 180 char, cant golf it... full respect farter :)
u/joeytwiddle

#game #tribute
u/Cloud

#tetris

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farter

function u(t) {

P=(a,b,c,d)=>(x.fillStyle=R(c,c,c),x.fillRect(a*d,b*d,-d,-d));for(i=26;i--;)for(j=16;j--;)P(i+C(t),j+S(t),C(S(i+C(t)*2)+S(j+S(t)*2))*255,80)

Mar 19 2017 6:21 PM UTC

}// 140/140

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u/magna

Nice!

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farter

remix of d/1862 by u/farter

function u(t) {

t||(f=0,s=1);s<<8&f||s>>24&255?(f|=s,s=1<<new Date,f>>24==-1&&(f<<=8)):s<<=8;c.width=63;for(i=32;i--;)(f|s)&1<<i&&x.fillRect(i%8*8,i&~7,7,7)

Mar 4 2017 6:09 PM UTC

}// 140/140

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fixed initial field f=0, and saved 2 bytes according to FireFly's suggestion!

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farter

function u(t) {

c.width=16;c.height=9;s=n=>(S(n)+1)/2*255;for(i=16;i--;)for(j=9;j--;){x.fillStyle=R((s(t+i)),(s(t+j)),s(t));x.fillRect(i,j,1,1)}

Mar 4 2017 8:22 AM UTC

}// 128/140

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play with zooming artifact depending on browser canvas implementations

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farter

remix of d/24461 by u/farter

function u(t) {

eval(unescape(escape`琿渽琫㉼〺氽〻楦⡬㱮⥻氽渻景爨椽氻ⴭ椻⥦潲⡪㵬㬭⵪㬩甽䵡瑨⹐䤯氬欽氭椭樬款〦☨稽㤶〯⠱⽔⡵⩩⤫ㄯ吨甪権⤬爽㐸⽬ⱸ⹦楬汒散琨稭爬㘰⭺⽔⡵⩩⤭爬爫爬爫爩⥽`.replace(/u(..)/g,"$1%")))

Dec 8 2021 7:02 AM UTC

}// 123/140

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does this diagram have a name? #waitforit

u/farter

finally with compressor from d/17775 , now draws incrementally non-repeating, just nicer! go fullscreen for more details.

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farter

function u(t) {

c[p="parentNode"][p].style.overflowY="scroll";c.width=150;a=b=1;for(i=0;i++<108;)x.fillText(a,8,i*10),a=(b+=a)-a;x.fillRect(1,t*99%1080,4,4)

Mar 9 2017 12:03 PM UTC

}// 140/140

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playing with DOM (no

u/hg

Nice DOM tricks.

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farter

function u(t) {

W=(a,w,d)=>(r=S(t/4)/2.1+.5,w>99&&W(a,w*r,d*.95)&W(a+w*r,w-w*r,d*.95),x.fillStyle=R(d),x.fillRect(a,0,4,d*4)),c.width|=0;W(-4,1924,255);

Mar 10 2017 1:29 PM UTC

}// 136/140

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u/donbright

fascinating

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farter

function u(t) {

t||(a=[],c.onmousemove=e=>(a.push([e.pageX*3.37,e.pageY*3.37,100])));c.width+=0;a=a.filter(o=>(x.fillRect(o[0],o[1],o[2],o[2]--),o[2]>0));

Mar 4 2017 2:26 PM UTC

}// 138/140

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hover your mouse

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farter

function u(t) {

l=t|0;for(i=1;i<l;i++)for(j=1;j<l;j++){u=Math.PI/l;k=l-i-j;k>0&&(
z=960/(1/T(u*i)+1/T(u*j)),r=48/l,x.fillRect(z-r,60+z/T(u*i)-r,r+r,r+r)
)}

Dec 7 2021 5:40 PM UTC

}// 139/140

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some math diagram about triangles with rational angles.

Show more comments…
u/farter

don't stare at it for too long cuz the amount of drawing grows quadratically.
u/farter

adjust viewport to get more complete view of its beauty~
u/farter

better performance & smoother graphic but can't golf.... t?n=t+2|0:l=0;if(l<n){l=n;for(i=l;--i;)for(j=l;--j;)u=Math.PI/l,k=n-i-j,k>0&&(z=960/(1/T(u*i)+1/T(u*j)),r=48/l,x.fillRect(z-r,60+z/T(u*i)-r,r+r,r+r))}
u/farter

this needs 3 secs wait. updated version at d/24464
u/farter

for really nonrepeating drawing, only draw when i,j,k are coprime.
u/joeytwiddle

l=60*t|0 can speed it up (but don't leave it running too long)

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farter

function u(t) {

t?(p=a[a[0]++],o=p>>6&255,p&1&&(o=a[o]),d=p>>4&3,p&2&&(d=a[d]),n=a[d],a[d]=[o,n+o,n-o][p>>2&3]):a=[4,0,1,0,101,177,121,209,256]//watch a[1]

Mar 10 2017 11:53 AM UTC

}// 139/140

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console.log(a[1]), something is running inside this "little computer"

u/farter

but sorry for no use of canvas lol
u/farter

console doesn't work now, instead, append this: ;c.width=150;x.fillText(a[1],0,10)

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