Dweets awesomed by u/recoder

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: #Opposites

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smtsjhr

remix of d/20615 by u/smtsjhr

function u(t) {

for(c.width|=n=2;n<8;n++)for(i=0|S(t*n/9)*30+30;k=(150+75*C(t*i/99)),i--;)x.lineTo(480*n-1200+k*S(j=i*6.28/n),540-k*C(j+t*n/5));;x.stroke()

Nov 14 2020 10:47 PM UTC

}// 139/140

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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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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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tomxor

remix of d/20416 by u/tomxor

function u(t) {

eval(unescape(escape`𠐽𤰨𭀩𞱂👃𚁴𚐻𩡯𬠨𨰮𭱩𩁴𪀽𦀽𜐲𞀻𦀭𛐻𚑻𩡯𬠨𦠽𜐬𤠽𥀨𦀯𞀱𛐮𞀩𞱡🐲𜀫𚁒𚡂𛑁𚐪𦠬𨠽𜐳𜠫𚁒𚡁𚱂𚐪𦠬𚁡𧡢𚐥𝰾𜐻𚑚𚰽𛠱𞱦𫱲𚁙🐭𝀸𞱙𚰫🀴𞀻𮀮𩡩𫁬𤡥𨱴𚁘𛀳𝠭𦐯𦠬𮠥𝰼𝠿𦠯𞀺𮠫𭀪𝠦𨐦𙠭𜐬𜐩𚑺🐨𨐫𨠩𚠸🀼𨐥𜠬𮠽𮠭𦑞𦐫𮡽`.replace(/u../g,'')))

Oct 30 2020 12:00 AM UTC

}// 140/140

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Doom? #raycasting

Show more comments…
u/tomxor

UAC something something Zombies... something something Mars
u/tomxor

Z+=.03 for smoother sampling if your CPU can take it.
u/yonatan

nice one!
u/DataMeta

super cool
u/Xen

love it!
u/sigveseb

waaa with texturing! awesome!
u/tomxor

Thanks :) I just realised I missclassified these. Although it is 2.5D with 3D texturing as Wolfenstien/Doom pioneered, the 2D distance is found using #raymarching rather than casting, which is necessary for size and implicit surfaces.
u/DataMeta

#d2.5
u/DataMeta

heheh tag gaffe
u/bandaloo

oh my god dude
u/vain

Uffff... O.o

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tomxor

function u(t) {

eval(unescape(escape`𭁼𯀨𬠽𨐽𨠽𝠴𚐻𠐽𤰨𬠩𞱂👃𚁲𚐻𩡯𬠨𨰮𭱩𩁴𪀽𦀽𜐲𞀻𦀭𛐻𨐭👫𚡁𛁢𚰽𪰪𠠬𬠭👃𚁘𛰴𜀫𤰨𭁞𦠩𚐯𦠯𦠬𮀮𩡩𫁬𤡥𨱴𚁘𛀳𝠭𜑥𜰯𦠬𪰪𬠬𜡥𜰯𦠩𚑦𫱲𚁚🐱𛁒👔𚁘𛰸𜐭𛠸𚐻𚁡𚰨𤠪𠠭𠐩𚡚𛰸𧡢𚰨𤠪𠐫𠠩𚡚𛰸𚐥𜐵🠱𞰩𪰽𚁚𚰫𚠪𛠵𛐳𚐯𝁥𜰻`.replace(/u../g,'')))

Oct 26 2020 9:45 PM UTC

}// 140/140

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Wolfendweet 3D #raycasting

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u/KilledByAPixel

🤯
u/DataMeta

🤩 #d3
u/magna

Wowstein!
u/neimad

You won Dwitter
u/tomxor

#raymarching
u/13thptr

#wolfenstein
u/xyper

this is my favourite dweet

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jellyedwards

function u(t) {

h=32
with(x)for(k=c.width=512;k--;beginPath(fill(ellipse(a,b,99,h,0,2-j,1+j))))fillStyle=`hsl(${i=h+k%h} 99%50%`,moveTo(a=256,b=i+(j=k<a)*t)

Oct 18 2020 9:38 PM UTC

}// 140/140

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a poltergeist steals a slice of #pumpkin pie extremely slowly

u/jellyedwards

the journey from ~300 chars to 140 is tough!
u/jellyedwards

could've shaved off a couple more bytes and have it work in Safari too:
u/jellyedwards

h=32 with(x)for(k=c.width=512;k--;beginPath(fill(ellipse(a,b,99,h,0,2,1,j))))fillStyle=hsl(${i=h+k%h},99%,50%,moveTo(a=256,b=i+(j=k<a)*t)
u/jellyedwards

h=32,with(x)for(k=c.width=512;k--;beginPath(fill(ellipse(a,b,99,h,0,2,1,j))))fillStyle=`hsl(${i=h+k%h},99%,50%`,moveTo(a=256,b=i+(j=k<a)*t)
u/Xen

slowly is how they always steal it :-(

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KilledByAPixel

function u(t) {

c.width|=i=490
for(x.translate(979,550);i--;x.rotate(Math.PI/5))x.rect(-1e3,(j=i%98)*80,2e3,80-C(j/9+t)*80)
x.fill`evenodd`

Oct 17 2020 6:21 AM UTC

}// 123/140

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u/BlueSkyTech

Amazing!

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KilledByAPixel

function u(t) {

for(b=i=800;i--;x.fillRect(b+S(i)*W+(a?59:t*99),Y*.7+650,9,9))Y=b*t-b,W=(a=Y>-549)?(3e5-Y*Y)**.3*14:39,x.fillStyle=R(v=S(i*19)*99+289*a,v/3)

Oct 2 2020 3:54 AM UTC

}// 140/140

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🎃 #pumpkin

u/sigveseb

looks tasty

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danny@hille.dk

function u(t) {

eval(unescape(escape`景爨呗㵉㴾匨琪㌫爫䤪ㄮ㘩⨶〬挮睩摴栽礽㜰〻搽呗⡲㵹⼲㔵⤬礭㴲㬩景爨椽㐻渽呗⡩⤬洽呗⡩⬱⤬戽㈵㔪⡭⵮⤯㜰ⱸ⹦楬汓瑹汥㵒⡩┲㼰㩢ⰰⱩ┲☦戩Ⱪⴭ㬩渼洦♸⹦楬汒散琨渫搫㌵〬礬洭測㈩`.replace(/u(..)/g,"$1%")))

Sep 29 2020 2:59 PM UTC

}// 134/140

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Nothing new, it has all been done before. I just had to try again :-) #twister for(TW=I=>S(t*3+r+I*1.6)*60,c.width=y=700;d=TW(r=y/255),y-=2;)for(i=4;n=TW(i),m=TW(i+1),b=255*(m-n)/70,x.fillStyle=R(i%2?0:b,0,i%2&&b),i--;)n<m&&x.fillRect(n+d+350,y,m-n,2)

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