Dweets awesomed by u/parabola

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: #Opposites

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parabola

remix of d/24461 by u/farter

function u(t) {

for(i=1,l=t<<4,u=3.1416/l;i<l;i++)for(j=1;j<l;j++)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 5:51 PM UTC

}// 137/140

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u/magna

Awesome!

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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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KilledByAPixel

remix of d/16862 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𪐽𞐹𝠻𭱩𭁨𚁸𚑦𫱲𚁳𩑴𥁲𨑮𬱦𫱲𫐨𜐬𜀬𜀬𜐬𚁴𚠽𝰲𝰰𚐥𜡥𜰬𭀯𜐶𚐻𪐭𛐻𬡥𬱴𫱲𩐨𩡩𫁬𤡥𨱴𚀰𛁓𚁪𚡪𚱴𚐪𜰹𛁪𛁪𛰲𞐩𚐩𬱡𭡥𚀩𛁳𨱡𫁥𚀡𬡯𭁡𭁥𚀨𜐫𪐫𪐥𜠩𚠮𝐲𜰶𚐬𪐥𜠪𜠭𜐩𛁲𫱴𨑴𩐨𪠽𪐯𜐲𯁣𫁩𬀨𫡥𭰠𤁡𭁨𜡄𚀧𫐰𘀰𭠵𜁨𜠹𙰩𚐩`.replace(/u../g,'')))

Dec 6 2020 4:02 AM UTC

}// 140/140

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#snowflake designs

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trupples

function u(t) {

c.width|=0
c.style.background=R()
x.fillStyle="#fff"
for(i=1e3;i--;p=1e5*S(i),r=9/(9-(p+t)%9),x.fillRect(C(i)*99*r+960,540+r*C(p)*99,r,r));

Dec 27 2017 11:51 PM UTC

}// 139/140

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u/sigveseb

Good starfield
u/trupples

<3
u/iverjo

#stars #starfield
u/jdspugh

Perfect

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parabola

function u(t) {

t*=99;i=~~(t/999)*9;j=t%999;r=i*i+j*j;a=k=0;for(;k<6.28;k+=.01)p=C(k)*i-S(k)*j,x.fillStyle=R(0,0,0,(p*p*r<99*r+99)*.01),x.fillRect(i,j,9,9)

Nov 23 2017 12:36 PM UTC

}// 139/140

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-> https://github.com/miloyip/light2d/blob/mast…

u/donbright

i let this run for a super long time and i loved it
u/parabola

@donbright sorry it's too slow, trying to improve it :P

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FireFly

function u(t) {

for(c.width|=A=16,i=9e3;i--;(X&8?B&2:"<fnvff<Ā~``x```".charCodeAt((B/A&3)*8+Y%8)>>7-X%8&1)&&x.fillRect(A*X,A*Y,A,A))X=i&127,Y=i>>7,B=X+Y+t*8

Mar 6 2017 8:36 PM UTC

}// 140/140

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00FF. More embedded bitmap fun :)

u/iverjo

Cool!
u/sfz

Going to take a three month sabbatical and figure out how this works.
u/FireFly

Anything in particular that I should explain? It might help to draw the bits of the codepoints in the string literal on a piece of paper, as an 8×15 grid (15 chars, 8 bits per char). Ā is U+100, used to encode 0x00.
u/sfz

Neat trick!

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parabola

remix of d/1868 by u/farter

function u(t) {

t||(a=[],c.onmousemove=e=>a.push([e.pageX,e.pageY,35,35]));c.width=568;a=a.filter(o=>(x.fillStyle=R(...o),x.fillRect(...o),o[2]=o[3]--))

Mar 4 2017 7:00 PM UTC

}// 136/140

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u/iverjo

What does R(...o) do?
u/iverjo

Found it :) It's the rest operator in ES6. Cool! https://github.com/lukehoban/es6features#def…
u/iverjo

I meant the spread operator
u/fujimotos

#interactive

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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) {

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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icecuber

function u(t) {

c.width=192;A=Math.abs;Y=A(t*99%176-88);X=A(t*139%376-188);x.F=x.fillRect;x.F(X,Y+7,3,3);x.F(187,Y+C(X/39)*29,5,20);x.F(0,Y-S(X/29)*22,5,20)

Apr 24 2016 12:39 PM UTC

}// 140/140

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Show more comments…
u/lionleaf

I'd love a blog post explaining how you approached creating this one!
u/iverjo

+1
u/SpecialAgent

+1
u/FireFly

I love this one—the movement doesn't really feel all that artificial despite being so. Hats off for figuring out how to get the pads to that :)
u/dh7

+1 very well done !!!
u/joeytwiddle

Amazing. Looks so real. Some handy techniques in here too :)
u/donbright

genius
u/TheGreatRambler

How do you do that under 140 chars?
u/lionleaf

#pong
u/lionleaf

#game
u/joeytwiddle

#tribute
u/Lazy1337

#witchcraft
u/vain

incredible - great work

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