Top #c64 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.

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robbyg

function u(t) {

c=t?c+4:1;throw p=(t?p:0)+4/c-4/(c+2)

May 29 2019 5:22 PM UTC

}// 37/140

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Calculating #pi based on a formula I found in a Commodore 64 manual. Googling says it's the Gregory-Leibniz series.

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marc8

function u(t) {

c.width=w=360;i=0
r=_=>Math.random()*256
while(i<=w){x.fillStyle=i<w?R(r(),r(),r()):"#43A"
x.fillRect(0,i,w,i+=2)}x.fillRect(40,20,280,160)

Mar 4 2019 10:51 PM UTC

}// 139/140

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u/tomxor

Oh crap :D it all came flooding back, now i gota go play llamatron
u/tomxor

#retro #amiga
u/tomxor

I love this, we need more retro!
u/tomxor

I did the atari loading bee :P d/12717
u/Jezza

I love this!
u/marc8

#c64
u/UEZ

#decruncher

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neimad

function u(t) {

c.width=w=i=360
for(;i--;){x.fillStyle=`hsl(${w*Math.random()},100%,50%)`
x.fillRect(0,i,w,i)}x.fillStyle='#43a'
x.fillRect(20,20,320,160)

Jan 28 2023 7:24 AM UTC

}// 138/140

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UNPACKING...

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u/Xen

nice!
u/tomxor

Yes! #atari st
u/neimad

It's actually supposed to look like a C64
u/tomxor

Lots of AtariST games started this way too, I never had a C64
u/joeytwiddle

I saw a #C64 but Acorn Electron is still the best! #retro #tribute
u/lonestar108

Yep reminds me of my C64... ah memories

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danny@hille.dk

function u(t) {

eval(unescape(escape`景爨眽挮睩摴栽㘴ⱸ⹦楬汒散琨〬〬眬眩ⱋ㴵㭋ⴭ㬩景爨椽㤻椭ⴻ⥸⹦楬汓瑹汥㵠桳氨⑻䬪㔰紬㜰┬⑻㤹ⵍ慴栮慢猨⡩ⴴ⤪㈰⥽┩怬砮晩汬剥捴⠰ⰹ⭓⡃⡴⼹⤫匨琪㈭䬩⤪㤫椬眬ㄩ㭸⹦楬汔數琨❃㴶㐧ⰱ㠬ㄸ⤻`.replace(/u(..)/g,"$1%")))

Jul 14 2020 9:21 AM UTC

}// 140/140

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C64 style copperbars/rasterbars

u/Xen

love it
u/danny@hille.dk

much better version:for(w=c.width=200,x.fillRect(0,0,w,w),q=5;q--;)for(i=9;i--;)x.fillStyle=hsl(${q*50},70%,${99-Math.abs((i-4)*20)}%,x.fillRect(0,9+S(C(t/9)+S(t*2-q))*9+i,w,1);x.fillText('C64',94,18)
u/marc8

#c64

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New_Core

function u(t) {

for(j=9;j--;)for(i=(b=99-j*9);i--;)x.fillStyle=`hsl(${b*4},99%,${99*S(i/b*3.3)}%)`,x.fillRect(0,440+i*2+5*b*S(t-j/1.8),1920,3)

Jun 8 2020 3:10 PM UTC

}// 126/140

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u/sigveseb

Old school cool
u/UEZ

#raster #bars #c64

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loktar

function u(t) {

for(S=10,D=750,x.scale(3,3),i=0;i<D*D;i+=S)!t&&x.fillText(~~(2*Math.random())?"╱":"╲",i%D,~~(i/D)*S);

Jun 25 2019 12:54 AM UTC

}// 101/140

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#c64 10 PRINT CHR$(205.5+RND(1)); : GOTO 10

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u/loktar

Always a bit longer in JS than on the Commodore.
u/loktar

If not for having to scale to make it viewable it can actually be smaller, removing scale and doing 2e3, vs 750 produces a nice result fullscreen.
u/loktar

#maze wow, some amazing implementations I'm glad I didn't check prior lol.
u/andrea270872

I learned programming with a C64! Ah, the nostalgia :)
u/loktar

@andrea270872 same here actually, although I've accumulated many more Commodores and various models since then haha
u/joeytwiddle

I just learned about that book today, through a different channel
u/joeytwiddle

C64 lovers might like this: http://www.oneliner64.com/

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smilingfrog

remix of d/21734 by u/tomxor

function u(t) {

b='︀＀ﾀ￀￠῰࿰߰ϰǸǸǸǸǸϰ砀砀砀砀㠀᠀ࠀ';eval(unescape(escape`𩡯𬠨𪐽𝰳𝠻𪐭𛐻𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮰲𝀰𚠨𦀼𜐶𯁼嬈𙠱𝠩𯐠𜐰𜀥𝐰𙑠𚑢𛡣𪁡𬡃𫱤𩑁𭀨𦀽𪐾🠵𚐾🠨𦐽𪐦𜐵𚐦𜐦𙡸𛡦𪑬𫁒𩑣𭀨𞐹𚱘🀼𜰬𚁩𙠱𝠿𞀲𛑙𞠵𜠫𦐩🀼𜰬𞐬𞐩`.replace(/u../g,'')))

Feb 22 2021 4:50 AM UTC

}// 140/140

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#pixelart #retro #commodore #c64 logo

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