Dweets awesomed by u/argarak

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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dnmc

function u(t) {

if(!window.p)p=0;
p=++p%150;
c.width=1920
for(q=0;q<192;q++)
for(w=0;w<108;w++)
if((q&w)%p==0){x.fillRect(q*10,w*10,10,10)}

Nov 15 2020 8:39 PM UTC

}// 124/140

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Sierpinski

u/tomxor

Sierpinski rain! :P

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rep_movsd

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁲𩑳𩑴𥁲𨑮𬱦𫱲𫐨𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮱴𚠹𝰥𜰶𜁽𛀹𞐥𛀵𜀥𛀮𜀵𚑠𚐬𭁲𨑮𬱬𨑴𩐨𞐶𜀬𝐴𜀩𛁍🐲𜀰𚡍𨑴𪀮𬡡𫡤𫱭𚀩𛁡🐱𜠻𨐭𛐻𩡩𫁬𤡥𨱴𚁍𛁍𛁍𛁍𚐬𬡯𭁡𭁥𚀮𝐲𜰩𚐻`.replace(/u../g,'')))

Nov 15 2020 4:05 PM UTC

}// 117/140

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Mandala #symmetry

u/tomxor

🍄
u/smtsjhr

v pretty

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rep_movsd

function u(t) {

eval(unescape(escape`𭁼𯀨𦀽𦐽𤐽𜰵𝐩𛁢👤🐾𩀪𭀥𤐊𭱩𭁨𚁸𚑦𫱲𚁺👫🐾𩡩𫁬𤱴𮑬𩐽𪰬𮀮𩠽𩡩𫁬𤡥𨱴𛁺𨀣𜀰𜀱𨀬𩠨𜀬𜀬𡠽𜡥𜰬𜡥𜰩𛁋👢𚁑𚐬𢰼𜠹𙠦𚁘👘𚠷𙑆𛁙👙𚠳𙐱𩐳𚐬𮠨𤠨𢰬𦀥𤐬𦐥𤐩𚐬𦠽𞐻𦠭𛐻𚑦𫱲𚁡🐱𞱡🀷𞰩𩠨𦀫𢰪𠰨𨐫🐮𜰩𛁙𚱋𚡓𚁡𚐬𞀬𞀩`.replace(/u../g,'')))

Nov 14 2020 6:48 PM UTC

}// 139/140

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#deepavali #fireworks #festival

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femto113

function u(t) {

c.width=1920
X=960,Y=540,P=Math.PI,N=t/P%32,p=P/N
for(i=0;i<P;i+=p)x.fillRect(X+Y*(S(i+P)-S(i))/2*S(t+i),Y+Y*(C(i+P)-C(i))/2*S(t+i),19,19)

Nov 14 2020 8:31 AM UTC

}// 138/140

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linear motion rolling circle illusion

u/katkip

#illusion
u/DataMeta

nicely done
u/pavel

If you delete c.width=1920 you can see only the first dot move linearly
u/femto113

curves are a side effect of changing N with t, if you use a fixed value like N=16 you get straight lines

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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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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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geb

remix of d/20574 by u/Xen

function u(t) {

for(i=2e3,c.width|=f=g=>(i*t/99)|g(a=i)-420*C(i/3+t)*g(a);i--;)x.strokeRect(1e3+f(C),502+f(S),s=9*S(i/1e3),s)

Nov 11 2020 6:14 PM UTC

}// 109/140

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found some fractals while golfing

u/Xen

i noticed but was far too giddy messing, probs a few decimals from something smooth and defined
u/katkip

beautiful
u/geb

thanks!

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argarak

function u(t) {

c.width=1920
for(a=0;a<40;a++){for(i=0;i<40*a/3;i++) x.fillRect(880+t/a+(400)*S(180-(i*4/t/20)),400*a+(t*a*200)*S(270-(i/t/200)),10,10)}

May 15 2020 3:03 AM UTC

}// 136/140

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quick flame

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rafroller

remix of d/18780 by u/rafroller

function u(t) {

u=t;
c.style.filter='invert()';for(i=0;i<10;){for(j=0;j<6;)x.fillRect(60*C(u*j)+211*i-99,60*S(u*i*1.01)+212*j-99,2,2),j++;i++}

May 14 2020 7:30 PM UTC

}// 126/140

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I really like this variation

dwitter.net | argarak (6620)