Dweets awesomed by u/Ghoust

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: #Food

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ciaccodavide

remix of d/21544 by u/ciaccodavide

function u(t) {

for(i=3e3;i--;)T=t*(i+t)*i%3,X=~~T%2==0?X/f:(W-X)/f+X,Y=T<2?Y/f:(W-Y)/f+Y,x.fillRect(X,Y,3,3)}{f=X=Y=3,W=1920

Feb 1 2021 3:02 PM UTC

}// 109/140

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#sierpinski

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DaSpider

remix of d/21497 by u/DaSpider

function u(t) {

eval(unescape(escape`𭀿𜐺𫠽𜐻𩡯𬠨𪠽𜐰𞱪𛐭𞱮𚰫𚑻𬀽𫠽🐱🰰𞠱𞱦𫱲𚁫🐲𞱫🀽𫠪𚠮𝐻𚐨𫠥𪰫𚰩𯁼𚁰🐰𚐻𮀮𩡩𫁬𤱴𮑬𩐽𤠨𫐽𜠵𝐪𘑰𛁭𛁭𚐻𮀮𩡩𫁬𤡥𨱴𚀱𞐰𜀬𚁮𙐱𜀩𚠱𜀰𛀵𛀹𜀩𯑸𛡤𬡡𭱉𫑡𩱥𚁣𛀭𝐬𜀩`.replace(/u../g,'')))

Jan 31 2021 9:33 PM UTC

}// 118/140

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Prime number distribution 0-9

u/DaSpider

#Prime
u/DaSpider

#primes

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katkip

function u(t) {

c.width*=1;
x.font='21cm"'
x[z="fillText"]("202",150,810)
t=frame/t+3.14/2;
x[z]("0",1340,810+T(-t)*200)
x[z]("1",1340,810+T(-t+3.14/2)*200)

Jan 1 2021 11:21 AM UTC

}// 140/140

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happy new year

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taupelink

remix of d/20654 by u/taupelink

function u(t) {

r=Math.random;for(i=k=214;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*5)*9,h=k*S(Y%S(m=X/6%S(p=C(q=Y*S(X/3))*2)*2)),x.fillStyle=R(h*p,h*m,h*q)

Dec 2 2020 4:43 AM UTC

}// 140/140

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d/20902

u/pavel

You can save 7 chars by doing f=i*t,X=f*f%9,Y=X*f%5 in these instead of Math.random. It seems random enough.
u/taupelink

Oh cool, thank you!! I like the way it changes the animation at the beginning too.

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ciaccodavide

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚐊𨰮𭱩𩁴𪁼🐱𒡰👸𛡣𬡥𨑴𩑐𨑴𭁥𬡮𚁤𫱣𭑭𩑮𭀮𬑵𩑲𮑓𩑬𩑣𭁯𬡁𫁬𚀧𨱡𫡶𨑳𙰩𦰱𧐬𙰧𚐊𮀮𩡩𫁬𤱴𮑬𩐽𬀊𮀮𬱨𨑤𫱷𠡬𭑲🐱𜀰𒡸𛡳𪁡𩁯𭱃𫱬𫱲👒𚀰𚐊𮀮𨑲𨰨𞐶𜀬𝐴𜀬𜰳𜰫𤰨𭀩𚠱𜀰𛀰𛀹𚐊𮀮𩡩𫁬𚀩`.replace(/u../g,'')))

Nov 20 2020 5:02 PM UTC

}// 128/140

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What lies behind the canvas

u/Xen

cool idea
u/ciaccodavide

Thanks :)
u/danny@hille.dk

nice trick
u/DataMeta

#fourthwall

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tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪀽𜐹𜠬𤠽𝀸𛁩🐸𜀶𝀻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚁓𚰹𝠬𥀫𝐴𛁃𚁍𨑴𪀮𨑴𨑮𜠨𤰽𪐥𞐷𛑒𛁔👩𛰹𝰭𤠬𬠽𚁓𚡓𚱔𚡔𚐪𚠮𝐩𚠹𚐪𜠰𛑲𙠴𝀦𙡲🠳𝠿𬠼𝀲🱔𛱒𞡓𛱒𞠱𛁲🠳𝠿𬠼𤠺𮠨𜰩𛰵𚐩𮠽𫠽🡮𛐭𙠦𠰨𥀯𜠫𤰪𥀯𤠫𭀪𞐩𚡃𚁔𛰴𛑺𚁮𚐪𜠩𛑲𛰶`.replace(/u../g,'')))

Nov 13 2020 1:17 AM UTC

}// 140/140

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#stargate

Show more comments…
u/DataMeta

wow WHAT
u/DataMeta

super rad combo of that fluid/smoke technique from a while back and the recent 2.5D Doom texture tricks!
u/chris@grimtech.net

Is this an incoming or outgoing wormhole? thanks
u/magna

WHAT.
u/sigveseb

Holy smokes!
u/tomxor

https://news.ycombinator.com/item?id=25088683
u/aleamb

brutal! amazing!!!
u/rep_movsd

This is one of the all time greats
u/Xen

Yess!
u/UEZ

Awesome. One rookie question: where are the color values saved?
u/red-lady

Stargate!!
u/tomxor

@UEZ the width and height of fillRect are used, when less than one pixel it will interpolate the alpha channel in proportion to the area. The same happens when an edge lies between two pixels (anti-aliasing).
u/UEZ

@tomxor: thanks for your fast reply. :-) That's what I thought but when will width used, when height? I'm trying to under JS by converting it to FB.
u/UEZ

*understand
u/tomxor

The following are equivalent when the values of w and h are between 0 and 1: fillRect(0,0,w,h) == fillRect(0,0,w*h,1). This is because the alpha channel of this pixel value is roughly proportional to the subpixel area (w*h). In terms of the patern we are trying to create, multiplication it's like the continuous version of AND, i.e the binary version is 1 IF w AND h. Additionally a lot of characters are saved when separating into w and h because we dont need to wrap the actual subexpression used to create w and h in parens and multiply them i.e fillRect(0,0,(.1+.2)*(.3+.4),1) becomes fillRect(0,0,.1+.2,.3+.4), that's -5 chars!
u/UEZ

@tomxor: thx.
u/nystrand

epic!
u/jelmo

Nice
u/vain

Wow! This seems to be your stargate... Seems you are not from this world! Incredible!!!

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jczimm

function u(t) {

w=(c.width+=0)/2-20
h=480
for(i=0;i<22;i++)
x.fillRect(w+S(t+i)*w*S(i),h+h*C(i)*S(t+i),40,60)

Oct 22 2020 6:42 PM UTC

}// 93/140

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KilledByAPixel

remix of d/20237 by u/Xen

function u(t) {

for(c.width|=i=512;i--;x.arc(z=960+C(i/19-t)*9,z-420,i,0,9))x.beginPath(x.stroke())

Oct 10 2020 2:09 AM UTC

}// 83/140

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Moiré Ripples

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New_Core

remix of d/19681 by u/danny@hille.dk

function u(t) {

c.width=99
a=[68,87,73,84,84,69,82]
for(i=7;i--;)x.fillText(String.fromCharCode(a[i]+19**S(t-i/9)),20+9*i,30)

Aug 16 2020 9:30 AM UTC

}// 109/140

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KilledByAPixel

function u(t) {

eval(unescape(escape`𩡯𬠨𭀿𨰮𫱵𭁥𬡈𥁍𣀽𫰺𪐽𫰽𙰧𞱩𚰫🀱𜀲𝀻𫰫👠🁣𫱤𩐠𫱮𨱬𪑣𪰽𭁨𪑳𛡩𫡮𩑲𢁔𣑌🐧𙁻𣐨𪐩🰧𚠧𞡮𯁼𙲷𙱽𙰾𘰼𛱣𫱤𩐾𙁻𪐥𝠴🰧𙰺𙰼𬀾𙱽𨀩𩡯𬠨𫠽𪠽𜀻𪠼𞐻𫠫👍𚁩𛐶𝐫𪠥𜰫𚁪𚰫𛰳𯀰𚐪𝠴𚐩𣐽𪐽🡩🠶𝀦𪐼𞐶𜀦𪐥𝠴🠱𙡃𚁩𚡩𚐾𛠹`.replace(/u../g,'')))

Jul 30 2020 6:37 AM UTC

}// 138/140

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Minesweeper 💣 #interactive #game

u/KilledByAPixel

hint - the sides are safe, there are 117 mines
u/Irratix

0_0
u/Xen

This is epic!!!
u/donbright

holy cow

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