Top dweets of all time

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.

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Current theme challenge: #Food

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tomxor

function u(t) {

for(w=c.width&=i=10368;X=--i%w,Y=i/w;x.fillRect(X+z*R,Y+z*T,Math.hypot(R=X/64-1-S(t),T=Y/64-.6-C(t/3))+!z/2,1))z=(w+X/3-Y/3^Y/3+X/3)%21>18

Jun 6 2023 5:58 PM UTC

}// 138/140

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#PCB #trace #bumpmap

u/tomxor

Getting on the bump train with a different method. This one displaces X and Y in proportion to distance from light source, which creates pixel gaps on one side (specular highlights), and overlapping pixels on the opposite (becoming shadows).
u/danny@hille.dk

wow thats chrisp!

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rodrigo.siqueira

remix of d/27925 by u/KilledByAPixel

function u(t) {

c.width=355
for(i=w=127;i--;)for(j=200;j--;)x.fillRect(i+114,j,1,((w*(C(a=Math.atan2(X=i/w-.5,Y=j/w-.8))/Y/6+t)^w*(S(X+Y)/Y/6))&w)/w*C(a/t))

Jun 6 2023 3:16 PM UTC

}// 140/140

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The Tunnel #tunnel

u/tomxor

For some reason this reminds me of those weird halfpipe levels on sonic2 on the megadrive https://youtu.be/8cr1rqVcIhA?t=484

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KilledByAPixel

remix of d/27866 by u/@noel

function u(t) {

for(c.width=i=w=255;i--;)for(j=142;j--;)x.fillRect(i,j,1,((w*(C(a=Math.atan2(X=2*i/w-1,Y=2*j/w-.6))/(d=(X*X+Y*Y)**.5)+t)^w*(S(a)/d+t))&w)/w)

Jun 6 2023 5:16 AM UTC

}// 140/140

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Projection Faster and Uncompressed

u/@noel

I love this one and I follow the logic, until the z & w performing. I know it's a bitwise AND operation on z and w, but I don't actually grasp it.
u/@noel

I mean on this one: x.fillRect(i, j, 1, (z & w) / w)
u/joeytwiddle

Here (z & w) / w is the height of the rectangle. If that height is less than 1, then the canvas anti-aliasing renders a grey pixel, instead of a black one.
u/@noel

Thanks u/joeytwiddle Now I think I get it. (z & w) ensures that the value of z remains within the range of the canvas width 'w', and the dividing by w normalizes the height value. Great trick!

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zola

function u(t) {

for(q=1e3,c.width=q,b=-(f=(20*t<<0)%8-3)*f/40,i=0;i<5;i++)m=2==i?4:1,x.fillRect(t%2*q+2*(i-2)*f*20-q/3,q/4*b+(q+b>>+i+2)+q/4/m+i,50*m,50*m)

Apr 26 2023 6:04 PM UTC

}// 139/140

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Bipedal Robot Run

u/Joachim

Lol this is really cool
u/joeytwiddle

#cute

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rodrigo.siqueira

remix of d/27379 by u/intrinsic

function u(t) {

c.style.filter=`invert(`
for(c.width&=i=1e4;i--;x.fillRect(i%2?S(i*i+t/70)*2e3:906+C(i*i+t)*r*S(i),i%2?i:500+S(i*i)*r,4,3))r=250+S(t+i)*99

Apr 17 2023 1:33 PM UTC

}// 138/140

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Alien Artifact #starfield

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rodrigo.siqueira

remix of d/27361 by u/PotatoImaginator

function u(t) {

c.width=950
for(k=j=128;j--;)for(i=k;i--;x.fillStyle=R(S(i/9-t*4)*k))i&j||x.fillRect(320+i*3+j+8*S(j/9+4*t),j*2+i*C(t+i/99)+k,3,3)

Apr 11 2023 8:14 PM UTC

}// 130/140

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Flying Sierpinski Wave

u/joeytwiddle

#sierpinski

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rodrigo.siqueira

remix of d/27082 by u/taupelink

function u(t) {

x.globalAlpha=.1
for(i=528;i--;x.fill())x.beginPath(x.fillStyle=R(i/3,i/2,i)),x.arc(X=i%22*89,Y=980-(i/22|0)%12*80,20/t+9,i,i+C(t+i*i)*7)

Feb 19 2023 1:40 AM UTC

}// 137/140

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22x12 Blue Circle Matrix

u/magna

Pretty!
u/jdspugh

Cool

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rodrigo.siqueira

remix of d/26978 by u/Mkac003

function u(t) {

for(c.width=a=352,h=99;a--;)for(b=h;b--;){for(m=n=0,i=19;n<1&&i--;)e=n*n-m*m+a/280-S(t-i/2)-1.2,m=n*m/h*b-1,n=e
x.fillRect(a,b*2,C(n),2)}

Feb 1 2023 6:04 PM UTC

}// 137/140

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Plasmatic chaos

u/lonestar108

Oh I love this one
u/Joachim

Pretty!
u/Xen

i love it!
u/SophiaCristina

Cool, looks like some 90's demo!

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tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𪐽𜐰𞱩𛐭𞱸𛡦𪑬𫁓𭁹𫁥👒𚁩𛐸𯁼𜠵𝐩𛁸𛡢𩑧𪑮𤁡𭁨𚁸𛡦𪑬𫀨𚐩𚑸𛡡𬡣𚀹𝠰𚱛𝀵𛀲𞐬𜐴𛀸𛀲𛀱𛠵𛀱𛀮𝠬𜀬𜁝𦱩𧐪𜑥𝐪𤰨𭀯𝑥𜰯𦰱𝠵𛀸𝀬𜠹𛀱𜠬𜠬𜐬𛠶𛀮𜠬𜐬𜑝𦱩𧐩𛀵𝀰𛁛𜠴𛀲𝐬𝐸𛀶𞐬𜰮𝀬𝠮𝀬𝠬𜠮𝀬𝠹𝠬𜡥𜱝𦱩𧐬𜀬𝰩`.replace(/u../g,'')))

Nov 26 2022 4:39 AM UTC

}// 139/140

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Accurate Relative Scale Solar System

u/tomxor

1000 kilometers per pixel, and 1000 seconds per second. Inspired by d/26463 An orthographic projection (i.e no perspective), imagine looking at our solar system through a telescope from a distant alien world. All scales are accurate relative to each other, radi, mean orbital distances, and sidereal orbital period. This is only possible by lining up the planets and looking through the orbital plane, but due to the massive orbital distances they all shoot off screen quickly.
u/jdspugh

Really cool
u/cantelope

madman

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rodrigo.siqueira

remix of d/26492 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,2e3,2e3)
for(Z=Y=i=-1;i<1;i=i+.001)
X=i*4.5+S(Z/52)/5,
Y=4*C(i*Y-2),
Z=(8+Y*S(3*i+t))*60,
x.clearRect(980+150*X,Z+Y,2,5)

Nov 21 2022 3:38 PM UTC

}// 135/140

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Liquid #bifurcation