Dweets awesomed by u/erin

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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tomxor

remix of d/19748 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𭰽𨰮𭱩𩁴𪀦👩🐸𜰲𜀻𪐭𛐻𭑛𪑝👴🱰🁷🱲𙐨𛠶𚱓𚁴𚠸𚱙𛰸𧡘𛰴𚐯𞐩𚠨𬀫𭑛𪐭𭱝𚱵𦱩𛑷𚰱𧐩𙡷𛐱𞡰𞠨寿𛐱𝀦𜐶𚐼🁲𚠮𝠩𬀽𭑛𪑝𛁸𛡦𪑬𫁓𭁹𫁥👒𚁰🁷𙠦𬀪𞀬𬀼𭰦𙡰𚠲𚐬𮀮𩡩𫁬𤡥𨱴𚁘👩𙑷𛁙🐶𞀭𪐯𭰬𜐬𬀪𚠮𝀯𞀭𜐩𛁲👩𚡴𧡩𙡙`.replace(/u../g,'')))

Aug 20 2020 2:25 AM UTC

}// 139/140

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#castle #fire colour version

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u/jellyedwards

Amazing!
u/magna

DUDE!
u/DataMeta

this is c r a z y
u/sigveseb

One of the best dweets ever
u/KilledByAPixel

Epic dweet!
u/rep_movsd

How does this even work :O

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tomxor

remix of d/19550 by u/tomxor

function u(t) {

for(w=c.width&=i=8320;i--;u[i]=t?p<w?r%.7*(p+u[i-w]+u[i-w+1])&w-1:p:(~r-14&16)<<r*.6)p=u[i],x.fillRect(i%w,Y=68-i/w,1,p**.4/7-Y/w),r=i*t^i&Y

Aug 19 2020 11:53 PM UTC

}// 140/140

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#castle #fire

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u/tomxor

Took some hints from d/11257 for the fire, but made it more minimal. Thanks to u/KilledByAPixel for the c.width&= trick that allowed to fit some nicer gradient and fire effect.
u/jellyedwards

That's incredible! How does the c.width&= trick work?
u/KilledByAPixel

c.width is 1920, 1920 & 8320 is 128, this way you don't need to write 128 for the width
u/tomxor

This is a bit verbose, but I found it easier to understand in binary: 1920 == 0b0000011110000000; 8320 == (8192 | 128); 8320 == 0b0010000010000000; (1920 & 8320) == 0b0000000010000000. In other words i needs to be roughly 8e3 to fill the screen, 8192 (the 14th bit) is not in 1920 so we can use it without affecting w. w needs to be quite small, 128 (the 8th bit) is the lowest bit available in 1920, which is why it's produced with AND.
u/magna

This is nuts.
u/magna

Please do a write-up on this Dweet.
u/jellyedwards

Thanks for the explanation
u/aleamb

absolutly amazing
u/DataMeta

+1 to magna's request
u/joeytwiddle

Pretty great!
u/13thptr

What u/magna said.
u/Xen

Sexy business right here
u/tomxor

Ok why not, I will do writeup, but need to make blog first :P I will post here and discord when done.

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tomxor

remix of d/19279 by u/rodrigo.siqueira

function u(t) {

f=(X,Y,n=9)=>n>X*X?f(X*X-Y*Y+C(X)-C(t*n/4),X*Y+1,n+S):x.fillStyle=R(n,n/3);for(i=9e3;i--;f(X/250-4,i/2e3-2))x.fillRect(X=i%128*S,i/8,S,S=16)

Jun 30 2020 11:23 PM UTC

}// 140/140

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Hmm, #julia set #fractal

u/tomxor

C(t*n)? Strange how it doesn't perceptibly speed up.

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KilledByAPixel

remix of d/18748 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𩡯𬠨𪰽𪐽𞀱𜐻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚁢🰰𞡫𚱲𚠨𘑰𚡓𚁴𚱪𚐫𤰨𪠾🠽𝀩𚠴𞐩𛁲𚠶𝐭𪰬𬀿𪠥𝰪𬠫𜰪𬠫𨠺𬠯𜰬𬀿𨠭𪠥𜠱𚡲𞠭𬠩𚑪👩𚱴𚠱𜠰𯀰𛁢👩𙐲𚠱𩐴𛁸𛡦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𨠿𪰺𪡽𘀤𮱢🰶𞐺𜐹𯐥𙁻𬀽𪠥𝀿𪐯𜐲𛐨𪠥𜐶🀳𚐪𞐺𜁽𙑠𛁲🐱𩐴𛱩`.replace(/u../g,'')))

May 13 2020 10:36 PM UTC

}// 140/140

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Flight Over Tiny Town 🛩️

u/KilledByAPixel

#city #d3

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tomxor

function u(t) {

eval(unescape(escape`𫱮𫑯𭑳𩑭𫱶𩐽𩐽🡵𦱥𛡸🠾𝁝🐴𞱦𫱲𚁩🐨𨰮𭱩𩁴𪀽𜠵𝠩𚠴𞱩𛐭𞱘👩𙐳𜠬𦐽𪐯𜐶𛁸𛡦𪑬𫁓𭁹𫁥👒𚁚𚡘𛁚𚠲𝀭𦐪𜰬𜠵𝐩𛁸𛡦𪑬𫁒𩑣𭀨𜰲𚱘𚠴𚱙𛀱𜐲𚱘𛑙𛀴𛀭𦠪𜰩𚑚🐸𚰸𚠨𭑛𪑝👵𦱩𧐪𛠷𚰨𭑛𪐭𜰳𧐫𭑛𪐭𜰲𧐫𭑛𪐭𜰱𧐭𭑛𪐫𝠴𧐩𛰸𯁼𜀩`.replace(/u../g,'')))

May 11 2020 1:03 AM UTC

}// 140/140

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Mmm yeeah, Stick ya Fingas in it !

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u/Xen

nice!
u/joeytwiddle

Pretty #fluid
u/katkip

So beautiful
u/sigveseb

fantastic!
u/aleamb

amazing #interactive
u/PoweredByWill

It's like that lighter-than-air insulation material!

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HellMood

function u(t) {

z=256;t=z-z*t%73;t*=t/6e4;for(i=99;i--;)for(k=56;k--;)x.fillStyle=R(((i-k/2)*t&k*t)*z,z,z),x.fillRect(i*19,k*19,11,11)

May 8 2020 11:49 PM UTC

}// 118/140

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Zoompinski

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u/HellMood

Hard to trade resolution, speed, zoom smoothness and space against each other ;)
u/sigveseb

Nice!
u/HellMood

#sierpinski
u/bandaloo

how does a sierpinksi triangle come out of that expression in R? i do not understand
u/joeytwiddle

bandaloo, you can get a Sierpinski out of i&k binary and
u/bandaloo

thanks joeytwiddle. i did some research after this and learned a lot

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rodrigo.siqueira

remix of d/18458 by u/rodrigo.siqueira

function u(t) {

for(X=f=c=>S(S(9*c/d)*t),Y=t/8-1.1,i=2e3;i--;x.fillRect(i,t*60,(1+f(X=i/480-2)*f(Y))*(d/2+Y),3))x.fillStyle=R(C(r=X*X+Y*Y)*125),d=r>1||T(r)

Apr 23 2020 5:58 PM UTC

}// 139/140

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Red Sphere Reflection #raytracing (high resoluton)

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u/Xen

Tf Dude! top dweet right here 😍
u/lionleaf

That's amazing!
u/lionleaf

#glass #sphere
u/stiaje

#witchcraft
u/Ath0r

Impressive, great job!
u/katkip

genius script
u/PoweredByWill

wow. dwitter povray.
u/mole

I am shooketh. This is absolutely incredible.
u/katkip

#slowrender
u/cli

This is great.
u/Nascretis

Actually insane. #witchcraft

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pavel

function u(t) {

for(let i=2e3,f=(x,n,c=8-(t+6)*n)=>~n&(x*x*n*n+(8+(t-12)*n)**2+c*c-5)**2/16+c*c>1?f(x,n+=.002):c;i--;)x.fillRect(i,t*180,f(i/135-7,.7),3)

Apr 23 2020 7:27 AM UTC

}// 137/140

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Actually #raytracing a #torus using ray marching

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u/Xen

Sweeet!
u/tomxor

Yes! we need more explicit surfaces on dwitter :)
u/Odog8

which expression is the DFT?
u/tomxor

I'm confused... this isn't explicit? it recurses.
u/pavel

This recurses just to advance ray length.
u/pavel

The closed form expression is x*x*n*n+(8+(t-12)*n)**2+c*c-5)**2/16+c*c-1 where c=8-(t+6)*n and n is the free variable.
u/tomxor

Ah, so is this technically ray casting? I have to ask because I still don't intuitively get all of the math.
u/tomxor

Sorry I meant ray marching
u/pavel

Yes. The math constructs a ray from (0,8,8) looking at (0,0,0), varied a bit depending on the pixel being drawn, its length is a function of n. I plug this into the equation for a torus and increment n from .7 to -1 until I find a zero of the equation.
u/pavel

Here is a version without much golfing that makes things clearer for(let i=2e3,f=(o,n,x=o*n,y=t/3*n-n,z=4-n)=>z>-1&(x*x+y*y+z*z+3)**2>16*(x*x+y*y)?f(o,n+.01):z;i--;)x.fillRect(i,t*180,f(i/540-16/9,3),3)
u/pavel

(x*x+y*y+z*z+3)**2>16*(x*x+y*y) is directly from https://en.wikipedia.org/wiki/Torus
u/pavel

with R=2 and r=1
u/pavel

This example shoots rays from (0,0,4). In order to rotate the shape you have to move where the rays come from, the camera!
u/tomxor

Thanks for the explanation 👍

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Georges-Abitbol

remix of d/18350 by u/Georges-Abitbol

function u(t) {

c.width=1920
for(i=0;i<479;i++)
{b=S(i*0.013);for(j=3;j<35*(1+C(t))*(1-C(t));j+=2)
b+=S(i*0.013*j)/j;x.fillRect(4*i,540+b*300,9,9,0)}

Apr 20 2020 6:36 PM UTC

}// 133/140

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BriSeven

function u(t) {

c.width*=1
for(i=64;i--;)x.setTransform(C(n=t+C(t)*i/40)*2,S(n),-S(n)*2,C(n),950,400+i*5),x.font='5cm A',x.fillText([...'🤚'][i%1],-60,40)

Apr 6 2020 2:45 AM UTC

}// 137/140

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Jelly Hand

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