Dweets awesomed by u/Tangil

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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erin

remix of d/13665 by u/rodrigo.siqueira

function u(t) {

c.width|=0,w=960
for(i=4000;i--;x.fillRect(w+w*X/Z,w-Y/Z*w,s=500/Z/Z/Z,s))
X=2*C(U=i+t)+C(V=t+i*i),
Y=T(U)+C(V)*T(V)-2,
Z=S(U)-5

Feb 11 2021 3:41 AM UTC

}// 128/140

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flow

u/erin

#d3
u/rodrigo.siqueira

Change from T(U) to S(U) and it will become a #torus
u/erin

check out my remix of this one, it turns into a torus and back into this shape

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rodrigo.siqueira

remix of d/21631 by u/rodrigo.siqueira

function u(t) {

c.width|=V=X=Y=Z=28
for(i=999;i--;x.lineTo(a*75,Z*V-i/t*3+1,6,6))Z+=(X*Y-Z)/V,Y+=X*(V-Z)/80,X+=Y/8-X/5,a=C(X+t)+Y*2
x.lineWidth=5
x.stroke()

Feb 10 2021 11:09 PM UTC

}// 140/140

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Flattening a #lorenz #spiral

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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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ciaccodavide

function u(t) {

c.width|=p=playing
x.font=`3em monospace`
x.fillText((p?'Playing ':' Paused ')+u,0,540+S(t)*99,1920)
document.onclick=p?pauseDemo:playDemo

Nov 4 2020 10:53 AM UTC

}// 138/140

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Play and pause demo on click

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DataMeta

remix of d/14521 by u/DataMeta

function u(t) {

with(x)for(j=768;j--;beginPath(fill()))fillStyle=R(o=C(t*12^j)*255,o,o,.5),arc(64*(j%31),64*(j/31|0),Math.abs(S(t)*32),0,7)

Nov 1 2020 4:05 AM UTC

}// 123/140

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u/tomxor

Noice!
u/joeytwiddle

Yes! http://www.pouet.net/prod.php?which=564

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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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ciaccodavide

function u(t) {

c.width=64
f=v=>824429291091531969149021958635251057546132335n&1n<<BigInt(~~t%10*15+v)
for(p=15;p--;)f(p)&&x.fillRect(30+p%3,15+~~(p/3),1,1)

Oct 28 2020 2:46 PM UTC

}// 140/140

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Decimal Counter without text

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u/ciaccodavide

For the crisp edges just add:
u/ciaccodavide

c.style.imageRendering='crisp-edges' [on Firefox]
u/ciaccodavide

c.style.imageRendering='pixelated' [on Chrome]
u/Xen

nice!
u/ciaccodavide

Thanks!
u/tomxor

Interesting, didn't know about the bigint n postfix
u/tomxor

Wow wait a sec... does this mean we can finally sue bitwise beyond 32bits in JS? 4503599627370496n>>52n
u/tomxor

oh this is cool 2n**64n there will be dwitterquences for this :)
u/ciaccodavide

yeeep ;)
u/Tesseract

0x24f7fbef924fef3fce7c9edf3cfcf9e4927b6fn makes it a little shorter, If you have any use for 5 more characters.
u/ciaccodavide

thanks u/Tesseract !!! I managed to get a compressed hd version thanks to your tip! d/20426
u/ciaccodavide

from 141 to 138 (compressed) :D

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New_Core

remix of d/20400 by u/ciaccodavide

function u(t) {

for(w=c.width|=i=9;i--;x.fill())s=25*S(t+i)+50,q=w-s*2,x.beginPath(),x.arc(s+Math.abs(q-(t*300-i*i*99)%q*2),900-800*S((i*6+t)%3.14),s,0,7)

Oct 26 2020 3:55 PM UTC

}// 138/140

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crazy balls if you wait for it.. =)

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ciaccodavide

function u(t) {

v=1337/3
r=33
w=(c.width=1920)-2*r
h=1080-2*r
m=l=>r+Math.abs(l-t*v%l*2)
x.arc(m(w),m(h),r,0,9)
x.fill()
x.rect(0,0,w+r*2,h+r*2)
x.stroke()

Oct 26 2020 2:25 PM UTC

}// 139/140

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Bounded Bouncing Ball

u/ciaccodavide

v // speed
u/ciaccodavide

r // ball radius
u/ciaccodavide

w // bounding box width
u/ciaccodavide

h // bounding box height

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ciaccodavide

remix of d/20391 by u/ciaccodavide

function u(t) {

P=9
for(K=0;K<960/P;K++)x.fillStyle=R(g=66+111*Math.random()*.02*K,g*.7,g*2),
x.fillRect(K*P,0,1920-P*K*2,P)
x.drawImage(c,0,P)

Oct 26 2020 12:54 PM UTC

}// 127/140

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Infinite Procedural Symmetry Optimized (edit P to change Pixel Size)

u/ciaccodavide

#symmetry

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