Dweets awesomed by u/DataMeta

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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DataMeta

remix of d/20446 by u/DataMeta

function u(t) {

for(c.width=134,i=682;i--;)x.fillRect(4*(i%36),4*(i/36|0),C(i)/T(t-i)/2,S(i)/T(t+i)/2)

Nov 14 2020 5:53 AM UTC

}// 87/140

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u/katkip

beautiful
u/DataMeta

thnx!

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pavel

function u(t) {

with(x)for(c.width|=i=78,translate(960,540);j=i*i--/5;rotate(!fillRect(j+=(S(t-j/99)-1)*1e5/j,j*=j>0,j*=-2,j)))fillStyle=R(89,a=222-j/4,2*a)

Nov 14 2020 4:47 AM UTC

}// 140/140

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Generative art by Alexander Tabakov

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donbright

remix of d/14974 by u/donbright

function u(t) {

宽=999
for(i=-宽;i<宽;i+=9)for(j=-宽;j<宽;j+=9){
b=i*i+j*j
r=i*i-j*j
g=2*i*j
n=frame+99
x.fillStyle=R(r*r%n,g*g%n,b*b%n)
x.fillRect(i+宽,j+宽,9,9)}

Nov 13 2020 7:18 AM UTC

}// 140/140

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#symmetry

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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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yonatan

function u(t) {

for(i=c.width|=u=v=0;i--;)x.fillRect(960+u*2,540+v,99,9),u+=b=S(m=i/99*S(i*i/1e6+t)),v+=a=C(m),x.fillStyle=`hsl(${q=a*b*50} 50%${q+50}%`

Nov 12 2020 10:26 PM UTC

}// 136/140

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u/donbright

really clean, smooth

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pavel

function u(t) {

for(c.width|=i=8;--i;)for(w=j=3<<i-1;j--;x.fillRect(-!x.rotate(6.283/w*(j+i/(1+5**(4+i-t%3*5)))),-25*i,2,25))x.setTransform(3,0,0,3,960,540)

Nov 11 2020 8:56 PM UTC

}// 140/140

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#beesandbombs

u/pavel

https://twitter.com/beesandbombs/status/1326…
u/pavel

#symmetry
u/donbright

nnnnnnice

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Xen

remix of d/20573 by u/New_Core

function u(t) {

for(i=137;i--;x.fill(x.arc(960+a*S(v=S(t+i/t)+i*.9),540+a*C(v),a/3+19,0,t)))x.beginPath(x.fillStyle=`hsla(${(a=i*9)+t*1e3},99%,40%,.02)`)

Nov 11 2020 6:17 PM UTC

}// 137/140

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Psychedelic Microscope

u/donbright

wild

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New_Core

function u(t) {

for(i=66;i--;x.fill(x.arc(960+a*S(v=S(t-i/50)+i*1.57),540+a*C(v),a,0,7)))x.beginPath(x.fillStyle=`hsla(${i*4+t*9},99%,40%,.1)`),a=~~(i/4)*50

Nov 11 2020 5:07 PM UTC

}// 140/140

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u/Xen

sexy :-o

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geb

remix of d/20544 by u/geb

function u(t) {

eval(unescape(escape`𦀽𜑥𜰬𦐽𦀯𜠊𩡯𬠨𨰮𭱩𩁴𪁼👩🐲𩐳𞱩𛐭𞱸𛡦𪑬𫁒𩑣𭀨𦀫👃𚁤𚠽𛠸𚐬𦐫👤𛀶𜀬𞐩𛁸𛡦𪑬𫁒𩑣𭀨𜡥𜰭𦀬𜑥𜰭𦐬𝠰𛀹𚐬𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮱩🠾𜑽𛀹𞐥𛀵𞐥𛀱𚑠𚑤👓𚁓𚁓𚁓𚁓𚁩𛰴𝐫𭀭𪐯𦀩𚐩𚐩𚠶`.replace(/u../g,'')))

Nov 10 2020 10:44 AM UTC

}// 125/140

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u/ciaccodavide

wow
u/aleamb

highly satisfying
u/donbright

great shading

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pavel

function u(t) {

for(c.width=960,j=8;j--;)for(i=20;i--;)x.arc(480,270,2**((i>>1)+i%2/2-j%2/2+t/3%1),a=(j+i%2)*Math.PI/4,a);x.fill()

Nov 10 2020 12:47 AM UTC

}// 114/140

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Infinite Triangles by MDWoolls

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