Dweets awesomed by u/Piggo

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: #Opposites

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tomxor

remix of d/28051 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𭰽𨰮𭱩𩁴𪀦👩🐱𜀳𝠸𞱩𞱔🐨𜠪𦀦𦠩𙐷🀳𙡙𚡙🀲🱒𛑔🱔𚰮𜀵𞡒𚰽𛠰𝐺𤠡👔🱒𙠽𮀮𩡩𫁬𤡥𨱴𚀭𛑩𙑷𛁩🠾𝰬𜐭𝁥𝐯𚁘𚱙𚰱𞀩𚠪𝐬𜐫𭐥𝠯𝠯𤠩𞠨𭐽𦐼𛠳🱙𚡙𧠲𞡙🀮𝠿𝐺𭰫𦀪𞑞𦐪𝑞𦠪𞐬𥀫𛠱𚐩𦀽𪐥𭰯𝠴𚡒𛑔𛁙👩𛰴𩐳𚡒𛑔𛁚👴𚠳𚱔`.replace(/u../g,'')))

Jun 28 2023 4:47 AM UTC

}// 140/140

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Pseudo Global Illumination

Show more comments…
u/KilledByAPixel

wow!
u/UEZ

brutal
u/Joachim

:O
u/vain

OMFG!!! Absolutly incredible. A "making of" or "how is it done" would be really nice. Awesome work you did!
u/tomxor

Thanks guys :) I have time to outline the pseudo radiance/GI concept at least: Each pixel's ray reflects once after the 1st intersection with the scene. All rays reflect in the same pre-defined direction, in parallel with each other, and roughly towards the light source but not collinear with it i.e not directly in line. The distance between the 2nd intersection (reflected ray end position) and the light source position, is used to estimate luminance.
u/tomxor

This is not physically accurate or intuitive, but is similar in concept to ambient occlusion where single bounce rays are used to estimate luminance based on "exposure" to ambient light. However unlike AC we can only afford a single ray, so we take that single ray and bounce it in a *similar* direction to the light source and see what we hit (what occludes the ray in that direction, which is why we get directional shading). The closer the 2nd intersection is to the light source the greater the luminance should be as a kind of bad proxy of "is exposed to a (probably?) bright surface".
u/tomxor

The reason we don't simply use the length of the reflected portion of the ray, is because although it does yield occlusion effects, the light position is inconsistent and parallel surfaces are flat and unconvincing because the reflected ray lengths are the same. So by making the light source and reflection ray not quite collinear, the distance between those 2nd intersections and the light source follows a gradient for parallel surfaces, causing more convincing shading... At least that's what I think is happening! I doubt this has good scene adaptability though, probably just a demo algorithm :D
u/tomxor

Also for some reason I'm quite happy with /R, super short poor mans anisotropic texture filter :P just fading out and letting lighting take over the further away the surface.
u/vain

Thanks u/tomxor - you really rock 😎
u/lionleaf

Ok, wow that's amazing!
u/iverjo

Incredible
u/jellyedwards

Unbelievable!!
u/cantelope

wat
u/jdspugh

Stunning
u/ugurkilci

I'm not understand! 𩡯𬠨𭰽𨰮𭱩𩁴𪀦👩🐱𜀳𝠸𞱩𞱔🐨𜠪𦀦𦠩𙐷🀳𙡙𚡙🀲🱒𛑔🱔𚰮𜀵𞡒𚰽𛠰𝐺𤠡👔🱒𙠽𮀮𩡩𫁬𤡥𨱴𚀭𛑩𙑷𛁩🠾𝰬𜐭𝁥𝐯𚁘𚱙𚰱𞀩𚠪𝐬𜐫𭐥𝠯𝠯𤠩𞠨𭐽𦐼𛠳🱙𚡙𧠲𞡙🀮𝠿𝐺𭰫𦀪𞑞𦐪𝑞𦠪𞐬𥀫𛠱𚐩𦀽𪐥𭰯𝠴𚡒𛑔𛁙👩𛰴𩐳𚡒𛑔𛁚👴𚠳𚱔 How? Your have unicode generator?
u/majorh5

You can use https://beta.dwitter.net for compressing your code to get it even smaller.

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KilledByAPixel

remix of d/28043 by u/KilledByAPixel

function u(t) {

t?c.width=99:V=W=X=Y=1
onmousemove=e=>(V=e.x/56-X/9,W=e.y/50-Y/9)
x.fillText('⬤',X+=V*=(X+V-45)**2<2e3?1:-.8,Y+=W*=Y+W<54?1+.1/W:-.8)

Jun 26 2023 10:37 PM UTC

}// 133/140

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Bounce the Ball ⬤ #interactive #uncompressed

u/lewdev

OMG, it works with your mouse too!

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rodrigo.siqueira

remix of d/10399 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(0,0,m=9e3,2e3);m--;x.fillStyle=R(m*S(m*m+t*3),m%210,Y/2))Y=m/9,x.fillRect(960+C(k=m/2-t/6)*Y*2,540+S(k)*Y+S(Y/99+t)*99,Y/9,9)

Feb 25 2022 9:51 PM UTC

}// 140/140

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Waving surface. Remix of my first dweet (3D Sombrero Equation).

Show more comments…
u/magna

WHOAAAAAA
u/magna

so pretty!
u/tomxor

I hear a mexican wave when looking at this, peaking in the middle :D
u/vain

great code, great colors, great execution !
u/aleamb

brutal
u/pavel

Very nice; sparing chars for the black background adds a lot
u/Renaud___

beautiful
u/cristea

So great!

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪀽𭰽𝀰𜀬𪐽𜀻𪐼𜑥𜰻𚰫𪐩𮱩𩠨𘐨𪐥𝀰𚐩𮀮𨡥𩱩𫡐𨑴𪀨𚐻𦀽𚁩𙐴𜀩𚠨𭰯𝀰𚐬𦐽𚁩𛰸𜁼𜀩𚠱𞀬𦐫🐨𤰨𭀪𚁘𚱙𚡴𚐯𜐶𚰨𪐯𝀰𯀰𚐪𜰮𜐴𚐪𜰩𚠪𝰯𜐷𜀫𜐰𛁸𛡬𪑮𩑔𫰨𦀬𦐩𞱩𩠨𪐥𝀰🐽𜰹𚑸𛡳𭁲𫱫𩐨𚑽`.replace(/u../g,'')))

Nov 13 2021 12:57 AM UTC

}// 129/140

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u/Xen

love it!

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cantelope

function u(t) {

for(x.fillRect(0,0,w=2e3,w),h=i=540;i--;)x.clearRect(960+(S(p=i/35+S(t/2)*60)*S(q=(i/57|0)*h))/(Z=C(p)*S(q)+2+S(t))*h,h+C(q)/Z*h,s=20/Z,s)

Nov 12 2021 8:04 PM UTC

}// 138/140

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#spherechallenge

u/taupelink

nice!
u/sigveseb

awesome indeed!
u/vain

very cool and smooth

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ciaccodavide

remix of d/24050 by u/ciaccodavide

function u(t) {

for(m=Math,w=1920,h=1080,i=3e4;i--;)r=m.random,X=r(),Y=r(),d=m.hypot(j=.5-X,k=.3-Y),x.fillRect(w*X,w*Y,(9+m.atan2(j,k))%.1<.04|d<.1?d:1,t<4)

Oct 8 2021 12:35 PM UTC

}// 140/140

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pale sun

u/primo

#japan

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ciaccodavide

function u(t) {

for(w=1920,h=1080,i=3e4;i--;)r=Math.random,X=r(),Y=r(),
x.fillRect(w*X,h*Y,Math.hypot(S(.5-X)*1.5, S(.5-Y)*2),t<7)

Oct 8 2021 11:58 AM UTC

}// 114/140

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Elliptical galaxy (filling the void)

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tomxor

remix of d/23968 by u/KilledByAPixel

function u(t) {

for(X=t?X+r*50:0,i=h=11+6*C(t*4+X%1)<<5;--i;x.fillRect(...t?[X-r*i/4,600+(r*8&3?i-h:h-i),i/4,2]:[i*8,r*999,h,r]))r=Math.random()

Oct 2 2021 12:56 PM UTC

}// 128/140

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Smolr Tree Lake

Show more comments…
u/tomxor

A nice round 2**7 chars. A bit of bitwise, ternary trimming and coefficient concessions
u/KilledByAPixel

nice! I'm surprised you didn't get rid of the Math.random()!
u/yonatan

nice golf, r=(t+i)**3.9%1 works too
u/tomxor

Yeah I was surprised to, I think this one is a bit more sensitive to bad distributions. Yonatan's is pretty good though.
u/pavel

X=t?X+r*50:0 -> X=t&&X+r*50
u/pavel

r=++t**3.9%1 saves 3 chars
u/pavel

Ah, no, it kills the sky/water.
u/KilledByAPixel

i feel it is possible to somehow golf the random part by at least a byte but I still haven't found a way without major issues
u/pavel

for(X=t&&X+r*25,i=h=11+6*C(t*4+X%1)<<5;--i;x.fillRect(...t?[X-r*i/8,600+(r*8&3?i-h:h-i),i/4,2]:[i*8,r*600,h,r]))r=1+S(i^X)
u/pavel

122
u/KilledByAPixel

I knew you could do it pavel!
u/aleamb

beautiful!!

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firegodjr

remix of d/23960 by u/firegodjr

function u(t) {

x.globalCompositeOperation="difference"
x.fillStyle="#fff"
x.fillRect(0,0,2,2)
x.drawImage(c,2,0)
x.drawImage(c,1,2)

Sep 29 2021 7:22 PM UTC

}// 116/140

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Recurrence (more triangular)

u/magna

Awesome!
u/magna

This could be combined with a gradual zoom to create a perfect loop
u/rodrigo.siqueira

Mesmerizing
u/astucky21

Something ominous about this, but love it.
u/aleamb

#sierpinski

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firegodjr

function u(t) {

x.globalCompositeOperation="difference"
x.fillStyle="#f00"
x.fillRect(0,0,1,1)
x.drawImage(c,1,0)
x.drawImage(c,0,1)

Sep 29 2021 6:57 PM UTC

}// 116/140

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Recurrence

u/aleamb

#recursion #sierpinski

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