New #crt 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: #ScaryMovies

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KilledByAPixel

remix of d/5737 by u/magna

function u(t) {

for(c.width=64,j=i=2304;i--;x.fillRect(i%64,i>>6,1,1))x.fillStyle=R(S(S=_=>i%T(j++%(q=t+4|0)*q+T(t/1e3))*255),S(),S())

Apr 25 2020 8:22 PM UTC

}// 118/140

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Light Show #glitch

u/tomxor

#crt ? I don't even see the code any more... all I see is trinitron, triad, inline mask...

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denzen

function u(t) {

a=150,x.font='1in s',(u=a=>x.fillStyle=R(0,a))(~t%2?a:80)
x.fillText('▌',80,a)
u(a+S(t)*30)
x.fillRect(0,t*720%2e3,2e3,t<.1?2e3:1)

Jan 21 2020 5:07 AM UTC

}// 130/140

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u/tomxor

#crt

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larzuk

function u(t) {

k=24,g=80|0;for(i=0;i<g*45;i++){j=i%g,h=i/g|0,m=Math.sqrt((j-40)**2+(h-k)**2)/2+S(h-t*k);x.fillStyle=R(m,k-m<<3,);x.fillRect(j*k,h*k,k,k);}

Oct 10 2019 2:56 PM UTC

}// 139/140

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VintageTerminal

u/aleamb

love it!
u/metamero

ultra cool
u/aleamb

I have no idea what tags can i put
u/metamero

#retro #crt
u/larzuk

:D

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vinca

remix of d/13321 by u/vinca

function u(t) {

for(c.width=150,x[r="fillRect"](0,0,150,75),i=11250;i--;)x.fillStyle=`hsl(${a=t&((X=9*S(t)+i/75)&(Y=i%75))*t,99*a},90%,50%`,x[r](X,Y,1,S(a))

May 1 2019 3:13 AM UTC

}// 140/140

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u/joeytwiddle

It has a nice fuzzy #tv effect
u/DataMeta

Keeps on giving! #waitforit
u/MAxSaL

I love watching this!
u/magna

#retro #crt

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tomxor

function u(t) {

eval(unescape(escape`眽㤰Ⱪ㵬㵷⩷⼵ⱴ㴱⭴⩴⼱㈻景爨砮晩汬剥捴⠰ⰰⱣ⹷楤瑨㵷⨲ⱷ⨲⤻椭ⴻ砮晩汬剥捴⡘⨶ⱙ⨶ⰱ⭋ⰵ⤩堽椥眯㌬夽椯眬䘽琭椯氬䬽ㄭ䘥ㄬ䬪㴨奞堭繆⤯㈷┱⭋⨪㠬砮晩汬却祬攽恨獬⠤筩⨱㈰紬㤹┬⑻䬪㤹紥⥠`.replace(/u(..)/g,"$1%")))

Feb 14 2019 12:46 AM UTC

}// 140/140

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Trinitron #crt #scanline #fractal

u/tomxor

Finally resorted to UTF8. This is a reasonably accurate slow motion aperture grille scanline animation... Although if run very slow you will see it's not simulating 3 electron beams. t=fps (scanline) w=width (subpixels) the later must be a multiple of 3 and 5. Use X, Y and floored F to plugin your own fractal!
u/tomxor

Uncompressed: w=90,i=l=w*w/5,t=1+t*t/12; for(x.fillRect(0,0,c.width=w*2,w*2);i--;x.fillRect(X*6,Y*6,1+K,5)) X=i%w/3,Y=i/w|0,F=t-i/l,K=1-F%1,K*=(Y^X-~F)/27%1+K**8, x.fillStyle=hsl(${i*120},99%,${K*99}%)
u/sigveseb

Kick-ass!
u/C010011012

bypassing the character limit I see using unicode escapements and regex u r very clever

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magna

remix of d/7512 by u/magna

function u(t) {

c.width=960
for(j=60;j--;)for(i=240;i--;x.fillRect(i*4,j*9,4,9))f=i+t*60,n=T(0|(j+f^f-j)/(t/2+6)),x.fillStyle=`hsl(${120*i},99%,${n*9%50}%`

Nov 4 2018 5:42 AM UTC

}// 139/140

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u/tomxor

Hah, it fits! awesome
u/tomxor

#crt #fractal
u/magna

It's monochrome, unfortunately. I couldn't find a quick way to add color (i.e. adjust the intensity based on R/G/B cells.)
u/tomxor

I can sort of fudge the colour with some kind of mod3 to selectively modulate the intensity in lum: (2+i%3)*n*10%50 duno how to fit it though.
u/magna

Nice! I used the dweet compressor (d/9207) to compress it: d/10843

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tomxor

function u(t) {

c.width=w=120
for(i=w*33;i--;x.fillRect(i%w,i/w*2,1,2))f=i%w+t*60,n=T(0|(i/w+f^f-i/w)/(t**.7+6)),x.fillStyle=R((n&1)*i/n/8,n**n,(n&3)*i/n/4)

Nov 3 2018 5:53 PM UTC

}// 140/140

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#retro #fractal #game

Show more comments…
u/tomxor

For the lazy game designer... Just add chip tunes and a player :D
u/tomxor

#crt #degauss #sidescroller
u/magna

Awesome!
u/magna

I had a RGB CRT setup, but I hadn't been able to fit any interesting patterns: d/7512
u/tomxor

I had a look at yours magna, they are true crt, much more realistic i think. The scan lines on this are just a sideeffect I exploited and it was easy to add colour distortion in the R().
u/magna

Here we go: d/10843
u/C010011012

is it a cellular automata?
u/tomxor

Yes and no, it's a fractal n=T(0|(i/w+f^f-i/w)/(t**.7+6)) which is just a more elaborate variation of serpinsky triangles to produce more interesting patterns. Some fractals are automata, but not all automata are fractals, see here: https://en.wikipedia.org/wiki/Rule_90
u/tomxor

The implication is serpinsky triangles are computationally reducable, meaning it does not have to be computed in the same way as a cellular automata i.e state can be computed at step t directly without traversing intermidiate steps.

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magna

remix of d/7512 by u/magna

function u(t) {

c.width=960
for(j=60;j--;)for(i=240;i--;x.fillRect(i*4,j*9,4,9))x.fillStyle=`hsl(${120*i},99%,${S(Math.atan(40-(i/3|0))*t*6)**2*50}%)`

Mar 29 2018 5:55 AM UTC

}// 134/140

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#crt

u/magna

#rgb

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magna

remix of d/7511 by u/magna

function u(t) {

c.width=960
for(j=60;j--;)for(i=240;i--;x.fillRect(i*4,j*9,4,9))x.fillStyle=`hsl(${120*i},99%,${S(Math.atan2(40-i/3|0,j-30)+C(t*3)*9)*50}%)`

Mar 29 2018 5:09 AM UTC

}// 140/140

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#crt

u/magna

#rgb

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magna

remix of d/7510 by u/magna

function u(t) {

c.width=960
for(j=60;j--;)for(i=240;i--;x.fillRect(i*4,j*9,4,9))x.fillStyle=`hsl(${120*i},99%,${S(Math.atan2(40-i/3|0,j-30)+i/3*t)*50}%)`

Mar 29 2018 5:03 AM UTC

}// 137/140

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#crt

u/magna

#rgb

dwitter.net | #crt