New #dithering dweets

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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Agnes

remix of d/32040 by u/Agnes

function u(t) {

M=()=>(Math.random()-.5)*(a-960+99*T(t/5))
for(c.width|=i=9;i--;)for(j=1e3;j--;x.fillRect(a+M(),400+j/5+M(),5,2))a=5*(j%10)+100*(i+4+3*S(t))

Jun 21 2024 9:08 AM UTC

}// 140/140

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#default sandblaster

u/joeytwiddle

Very cool #focus effect with #dithering

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tomxor

remix of d/20405 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪀦👩🐸𜰲𜀻𪐻𠰽𠰭𝠴𚱓𯀰𚐨𤰯𝠴𚡒𛑒𚱃𛰳𩐶𧡒𚰳𚡴𚐥𝰿𤠪🐱𛠰𜠺𮀮𩡩𫁬𤡥𨱴𚁓👩🠾𝠬𦐽𪐦𝠳𛁱🐰𯀨𬀽𚁸𦰭𛑩𧐫🐷𚡔𚐫𚁙𛰳𜠪𤠭𤡼𜀿𦐯𜐲𞀺𜐭𜐯𤠩𚐬𦐿𜐺𤠽𜐬𥀽𚁰𛑱𯁼𜀩𛰱𝠬𮁛𭑝𚰽𜰪𥀬𮁛𭐽𪐭𝠴𧐫🐵𚡔𛁸𦱵𛐱𧐽𥀩`.replace(/u../g,'')))

Jun 11 2023 2:56 AM UTC

}// 140/140

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Return to Castle Floyd Wolfensteinberg

u/tomxor

Also used d/24142 #wolfenstein #dithering
u/magna

LOL
u/KilledByAPixel

haha, nice!
u/donbright

#3d
u/donbright

holy smokes

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f8f82804

remix of d/24681 by u/f8f82804

function u(t) {

for(i=c.width=1760,e=0,s=32;a=i>>5,b=(i&s?i:~i)&31,i--;x.fillRect(a<<5,b<<5,s,s))p=s+(2+S(t))*a*b/9,x.fillStyle=R(q=s*((p+e)>>5)),e+=p-q

Jan 3 2022 12:38 AM UTC

}// 136/140

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Single color 1D #dithering using #boustrophedon to propogate error

u/f8f82804

d/24683

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f8f82804

remix of d/9495 by u/f8f82804

function u(t) {

eval(unescape(escape`攽孝㭦潲⡡㴶〻愭ⴻ⥦潲⡢㵳㴳㐬䔽敛戭ㅝ簰㭢ⴭ㭸⹦楬汒散琨猪愬截猬猬猩⥰㴹㤫匨琩⩡⩢⼹ⱸ⹦楬汓瑹汥㵒⡱㵳⨨⡰⭅⴨⡡幢⤦㌩⤯獼〩⤬䔽敛戭ㅝ簰Ᵽ㵰⵱ⱥ孢崫㴵⨨敛戭ㅝ㵣⼽ㄶ⤬敛戫ㅝ⬽挪㌬䔫㵣⨷`.replace(/u(..)/g,'$1%')))

Jan 3 2022 12:38 AM UTC

}// 140/140

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Floyd-Steinberg #dithering with spatial coherence

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stephanegeorget

function u(t) {

for(i=(j=c.width=1920/4)*(k=1080/4);i--;)

x.fillRect(

m=i%j,l=i/j|0,

!!(i%(

((S((m)/30)+C(l/30+10*t))+0+S(10*t))*

(
S(3*t)+2
)

)|0),1)

Jan 2 2022 12:11 PM UTC

}// 140/140

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Learning dithering…

u/f8f82804

#dithering

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tomxor

remix of d/24141 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𩠽𧰽🡓𛰶𞀭𜐮𞀸𯁃𛰱𝠭𝀮𜑼𤰫𝀦𞀬𭰽𨰮𭱩𩁴𪀦👩🐳𜰰𜠴𞱩𛐭𞱸𛡦𪑬𫁒𩑣𭀨𤰽𪐦𜠵𝐬𠰽𪐾🠸𛀱𛁱🐲𚡰𯀰𚐬𤠽𚁰𛑱𚐯𜐶𛁵𦱔𧐫🐳𚡒𛁵𦱔👩𛑷𧐫🐵𚡒𛁵𦱔𛐱𧐽𤠩𬀽𚁵𦱩𧐫🐷𚡒𚐫𚁦𚀩🱦𚁓𛐽𝀬𠰭🐴𚐿𚁓𚡓𚱃𚡃𚐯𞑥𝀫𛠱𞠱𞠰𚑼𯀰`.replace(/u../g,'')))

Oct 16 2021 12:50 AM UTC

}// 140/140

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#default Floyd–Steinberg #dithering

u/ciaccodavide

oooooh, I love dithering! Nice one!
u/tomxor

me too :) I didn't realise how simple the algorithm was before no, and it can be done in a single pass because it's only half a 2d kernel. Tweaking the coefficients (*R) can be fun, e.g 7*R=>5*R, 3*R=>5*R better preserves the dark and light areas in this image.
u/magna

Wow
u/sigveseb

Very nice!

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tomxor

function u(t) {

for(w=c.width&=i=8320;i--;x.fillRect(S=i&127,C=i>>7,1,q=2*p|0),R=(p-q)/16,u[T]+=3*R,u[T=i-w]+=5*R,u[T-1]=R)p=(u[i]+=7*R)+(S*S+C*C)/8e3-1||0

Oct 15 2021 11:21 PM UTC

}// 139/140

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Floyd–Steinberg #dithering

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Xor

function u(t) {

for(i=w=1920;i-->0;)d=t*60*w+i,a=d%w,b=(d-a)/w,(Math.random()>a/w)?x.fillRect(a,b,1,1):0

Apr 28 2021 3:40 PM UTC

}// 88/140

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Gradient

u/UEZ

#dithering

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f8f82804

remix of d/9542 by u/f8f82804

function u(t) {

for(U=V=0,z=i=64;i--;)for(j=z;j--;x.fillRect(16*i+448,16*j,16,16))U+=i+S(t),V+=j+C(t)/9,x.fillStyle=R(U>z?(U-=z,255):0,V>z?(V-=z,255):0,255)

Aug 31 2018 5:05 PM UTC

}// 140/140

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#outrun #palette #dithering #animated

u/f8f82804

the palette that's being rendered in 4 colors: for(z=i=64;i--;)for(j=z;j--;x.fillRect(16*i+448,16*j,16,16))x.fillStyle=R(i*4,j*4,255)

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f8f82804

remix of d/9570 by u/f8f82804

function u(t) {

z=32;for(i=z*z;i--;x.fillRect(i%z*z+448,j*z,z,z))U=i%z*S(t)**2,V=(j=i/z%z|0)*S(t)**2,x.fillStyle=R((i+t|0)%7*U+U>z?255:0,0,i%7*V+V>z?255:0)

Aug 30 2018 11:41 PM UTC

}// 139/140

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ordered #dithering #animated

u/joeytwiddle

Very clever mini dithers! How about dithering a sphere?
u/f8f82804

A sphere is a good idea! I'm still trying to work on spatial coherence though; see my earlier Floyd-Steinberg demo to get an idea of what's possible with 2d error diffusion. This dweet is a start at using a mask instead of diffusing errors.

dwitter.net | #dithering