Dweets awesomed by u/Renaud___

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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danny@hille.dk

remix of d/20618 by u/danny@hille.dk

function u(t) {

for(c.width=433,p=1;p++<6;)for(i=400;i--;)x.fillStyle=`hsla(${p*t*5},99%,50%,.4`,x.fillRect(i,m=C(i/(9*p+96)+t)*p*S(+p+S(i/66))*9+57,1,m)

Nov 16 2020 9:55 PM UTC

}// 137/140

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u/ciaccodavide

Smooth!

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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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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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New_Core

remix of d/20460 by u/pavel

function u(t) {

with(x)for(c.width|=i=226;i--;beginPath(fill()),fillStyle=R(T,i),T=(65-65**S(t+i)))for(j=6;j--;)lineTo(T*S(q=j*1.05)+i%38*59,T*C(q)+i%12*99)

Nov 4 2020 7:02 PM UTC

}// 140/140

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well... almost

u/pavel

-12 chars with(x)for(c.width|=i=226;i--;beginPath(fill()),fillStyle=R(T,i))for(j=6;j--;)arc(i%38*59,i%12*99,T=65-65**S(t+i),q=j*1.05+11,q)

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pavel

function u(t) {

for(c.width|=i=266;i--;x.beginPath(x.fill()))for(r=74-T(S(i*i+t/4)*.6+t/2)**8,j=6;j--;)x.arc((i>>4)*2-i%2<<6,i%16*111,r>0&&r,a=j*1.047+11,a)

Nov 3 2020 8:04 PM UTC

}// 140/140

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Hexagons are the Bestagons

Show more comments…
u/pavel

Inspired by https://www.youtube.com/watch?v=thOifuHs6eY and https://twitter.com/Hau_kun/status/124501623…
u/danny@hille.dk

Amazing
u/pavel

This would look better with the colors inverted but I couldn't fit it.
u/tomxor

Neat!
u/joeytwiddle

Hexcellent
u/anotherkitten

so crisppp
u/Xen

so clean
u/DataMeta

hextra smooth
u/katkip

hexy
u/RamiSlicer

HEXAGONS ARE THE BESTAGONS!!!!!
u/erin

they are

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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

remix of d/20405 by u/tomxor

function u(t) {

A=S(t);B=C(t);for(c.width=X=128;X--;x.fillRect(X,36-1e3/Z,Z**.5/16,2e3/Z))for(Z=1,R=T(X/81-.8);(A*t+24+(R*B-A)*Z/8^64+(R*A+B)*Z/8)%15>1;)Z++

Oct 28 2020 6:12 PM UTC

}// 140/140

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Wolfendweet 3D #raycasting sans-bot no-clip

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u/pavel

The lack of x.fillStyle is amazing.
u/pavel

Save 3 chars by incrementing Z by .1 instead of doing the math every time: A=S(t);B=C(t);for(c.width=X=128;X--;x.fillRect(X,36-125/Z,Z**.5/7,250/Z))for(Z=0,R=T(X/81-.8);(A*t+24+(R*B-A)*Z^64+(R*A+B)*Z)%15>1;)Z+=.1
u/tomxor

Ah yes! thanks pavel :) I did try to get rid of Z/8 once but didn't go far enough with the constants as you did.
u/tomxor

Can also now play with the marching granularity more easily to get smoother results... although it's very slow without an SDF for the fractal for larger initial steps.
u/Xen

love it!
u/tomxor

#raymarching
u/13thptr

Nice dweet. Related: d/2961 d/7076
u/13thptr

#wolfenstein

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