How to reproduce:

• use tline3d with "w" parameters
• draw a tline where the starting point crosses the screen border
• notice that result gets skewed

demo cart:

• arrows to move square
• see what happens when moving left :)

unrelated: tline3d doc needs some carriage returns!

 

wowogomewe

by freds72

Cart #wowogomewe-0 | 2024-03-24 | Embed ▽ | No License

3

string

by Hessery

Cart #string-0 | 2024-03-24 | Embed ▽ | License: CC4-BY-NC-SA

String

Picotron is currently missing many basic string handling functions. I've created this library to fill in some of the functions that I've come across. If you want to contribute please comment below your code and I'll add it.

Installing

Use load #string and then press ctrl+R to install.

Functions

string.upper(str)

Converts a-z characters to their A-Z counter parts.

string.lower(str)

Converts A-Z characters to their a-z counter parts.

string.explode(str, delimiter)

Converts a string into an array, splitting it at the delimiter.

dyninclude

by PyroChiliarch

Cart #dyninclude-3 | 2024-03-28 | Embed ▽ | License: CC4-BY-NC-SA

3

Script to dynamically include libraries, use dynInclude() instead of include()
You only need to specify the library name and it will be auto downloaded and installed if not currently installed then included automatically.

A simple and easy way to include libraries in your cart without the hassle.

Will try to load libaries from the following locations in this order:
1 - ./lib
2 - /appdata/system/lib
3 - /system/lib
4 - The BBS system (Will attempt to download and install the library to /appdata/system/lib

Usage:
The below code will include the basexx library, automatically downloading and installing it if necessary

include("./dynInclude.lua")

[ [size=16][color=#ffaabb] [ Continue Reading.. ] [/color][/size] ](/bbs/?pid=144273#p)

The bug this cart fixes was patched in v0.1.0c, no longer needed unless you still use an old version

Use?
load #patch_load and press ctrl+r
This only needs to be done once and is persistent over reboots

Why?
There is currently a bug where you can only load #<cart> once per reboot
This is because of a typo on line 27 that doesn't properly delete the current cart
Patching isn't as simple as fixing the line as /system will refresh itself on every reboot
Run this cart to permanently fix this bug (Persistent over reboots)

How?
When run, store a patched load.lua in /appdata/system/util and append some lines to startup.lua
that will copy this patched load.lua to the /system/util folder on each reboot

Will it overwrite my startup.lua?
This cart will append to /appdata/system/startup.lua, so your current startup config will still work.

Src?
https://github.com/PyroChiliarch/picoPatchLoad

Versions:

version 1: main.lua was empty, fixed it.

[ Continue Reading.. ]

newcarts

by EZEN

Cart #newcarts-3 | 2024-03-24 | Embed ▽ | License: CC4-BY-NC-SA

15

A program that displays all new Picotron cartridges on the BBS and downloads them into RAM with a click. An easy way to find new programs from within Picotron itself.

new

by PyroChiliarch

Cart #new-1 | 2024-03-25 | Embed ▽ | License: CC4-BY-NC-SA

5

What are you doing to clear /ram/cart at the moment?
Deleting files manually?
Rebooting Picotron?

Try using the brand new fancy empty cart!
Simply type load #new to clear out /ram/cart

That's it!

Hi, I was experimenting with a way of making a multiplayer game on Pico-8 (on different cartriges to have more screen space).
So I was looking for a way to communicate from the cart to the host OS, I know it's possible to inject and retreive data on the web exports with javascript but I'm trying to find a way to do it localy .

I have tried that code:

cls()
i_channel=0x804
o_channel=0x805
input=''
output=''

function _update()
	local nb=0
	repeat
		nb=serial(i_channel,0x8000,0x1000)
		for i=0,nb do
			input..=chr(peek(0x8000+i))
		end
	until nb==0

	if (btnp(⬅️)) output..='⬅️' stdout('left ')
	if (btnp(➡️)) output..='➡️'	stdout('right ')
	if (btnp(⬆️)) output..='⬆️'	stdout('up ')
	if (btnp(⬇️)) output..='⬇️'	stdout('down ')
	if (btnp(🅾️)) output..='🅾️'	stdout('𝘰 ')
	if (btnp(❎)) output..='❎'	stdout('𝘹 ')
end

function _draw()
	print('\^rf'..output,2,2,7)
	print('\^rw'..input,66,2,13)
end

function stdout(str)
	for i,c in pairs(split(str,'')) do
		poke(0x9000+i-1,ord(c))
	end
	serial(o_channel,0x9000,#str) 
end

it uses the stdin and stdout of the cart to read and write into files when called like this:
> pico8 < input_file.txt > output_file.txt -run mycart.p8
The problem I ran into is that I can't use the same file for the input and output.

My best attempt was to use a pipeline to redirect the stdout of a cart to the stdin of another one like this:
> pico8 -run mycart.p8 | pico8 -run mycart.p8
The problem here is that a strange thing is happening, the first cart boots and works fine but the second one freezes until the first one is shutdown. Then it works as intended, I get the output from the first cart. But I am not able to make the to instances of the cart run at the same time and communicate.

Any idea how to pull it of ?

basexx

by PyroChiliarch

Cart #basexx-1 | 2024-03-25 | Embed ▽ | No License

1

Install from BBS with load load #basexx and run it with crtl+r

A file will be created at /appdata/system/lib/basexx.lua

Usage:

include("/appdata/system/lib/basexx.lua")

string = "hello world"
print("Raw: " .. string)
print("Bit (Base2)" .. basexx.to_bit(string))
print("Hex (Base16) " .. basexx.to_hex(string))
print("Base32 " .. basexx.to_base32(string))
print("Base64 " .. basexx.to_base64(string))
print("Crockford " .. basexx.to_crockford(string))

[ [size=16][color=#ffaabb] [ Continue Reading.. ] [/color][/size] ](/bbs/?pid=144252#p)

If you use the command line to set the value of a variable and then attempt to select a pause menu option where menuitem's callback function returns true (that is, an option that's supposed to keep the menu open after selecting), the game crashes with the message "attempt to call upvalue '_superyield' (a nil value)"

Calcifer

by donswelt

Cart #calcifer-2 | 2024-03-27 | Embed ▽ | License: CC4-BY-NC-SA

14

Just a calculator, but with a fiery twist. My wife came up with the name, so I had to add a little mascot :) It's a fully functional calculator. At least I hope it is. Better not do your homework or taxes with it ^^;

Update: Fixed some odd behaviour and added a button to make numbers negative or positive.
Update 2: Fixed the behaviour of the % key, added partial keyboard support (at least the numbers are working), a custom icon and meta date.

Things to do:

• Button feedback

I cannot edit after ID8 in the instrument edit.

https://www.lexaloffle.com/dl/docs/picotron_synth.html#Instruments

There are 128 global instruments defined at 0x40000 by default, each 512 bytes.

Are the 128 instruments mentioned in the specifications scheduled to be available in the editor? Currently there are up to 25.

Also, when multiple envelopes are set to "DATA" mode, the window extends outside of the screen.
Scrolling is required in the same way as for the waveform configuration windows.

The picotron version at the time of this posting is at least 0.1.0d or earlier.

base64

by PyroChiliarch

Cart #base64-2 | 2024-03-25 | Embed ▽ | No License

6

base64.lua library for use with Picotron, (very) slightly modified version of https://github.com/iskolbin/lbase64

Install with load #base64 and run it with crtl+r
A new file will be created /appdata/system/lib/base64.lua

Basic usage:

include("/appdata/system/lib/base64.lua")
print("Plain: abcdefg")
print("Base64: " .. base64.encode("abcdefg"))

Basic functions:

base64.encode(string)
base64.decode(string)

Visit https://github.com/iskolbin/lbase64 for advanced usage

Source: https://github.com/PyroChiliarch/picoBase64

dynInclude compatible: https://www.lexaloffle.com/bbs/?tid=141042

Captain Mario

by Steven()#6

Cart #cmtn-0 | 2024-03-23 | Code ▽ | Embed ▽ | No License

6

This is a retexturing of Captain Neat-O in the Time Nexus by @paranoidcactus, done by my little brother. He wanted to show it off. Get to the final boss to see who it is! :)

A tool to help with print debugging based on the Python package IceCream. There's already a Lua version of IceCream but it won't work with Pico-8/Picotron as far as I know. I've called it db for debug rather than ic but it's very similar in concept.

You can download the code here or copy/paste below:

db.lua [hidden]

----------------------------------------------------------------------------
-- print debugging based on IceCream for python
-- pico-8 lua version by jason delaat
do
   local ignore = {}
   local lookup = _ENV
   for k,_ in pairs(_ENV) do
      ignore[k] = true
   end
   local function format_arg(value, env)
      for k,v in pairs(lookup) do
         if v == value and not ignore[k] then
            return 'db: '..k..'='..tostr(v)
         end
      end
      return 'db: '..tostr(value)
   end

   local db_meta = {
      __call=function(self, value, log)
         if db.display and log then
            print(log)
         elseif db.display then
            print(format_arg(value))
         end
         return value
      end
   }
   db = {
      display = true,
      local_env = function(t)
         lookup = setmetatable(t or {}, {__index=_ENV})
         return lookup
      end,
      reset_env = function()
         lookup = _ENV
      end,
      wrap = function(f)
         local fn = sub(split(format_arg(f), '=')[1], 5)
         _ENV[fn] = function(...)
            local log = 'db: '..fn..'('
            local result = f(...)
            for a in all({...}) do
               log ..= tostr(a)..','
            end
            log = sub(log, 1, -2)
            log ..= ') --> '..tostr(result)
            return result, log
         end
      end
   }
   setmetatable(db, db_meta)
end
----------------------------------------------------------------------------

\

[ Continue Reading.. ]

how to reproduce:

• create a lua file in a long path
  say:
  /apps/mygame/program.p64/library/maths/matrix/code.lua
• see how syntax errors message get truncated:

how to reproduce:

• select "dizzy.p64" as screensaver
• let it run for some minutes
• rotation/effect speed increases over time

I get occasional crashes when using the new feature to remap the spritesheet to the extended memory. Can't reproduce reliably. But documented in this video at 15:38. No error message. Just a clean crash to the desktop. Using Windows 11 Pro.

In version 0.2.6B merge_joysticks 2 doesn't work as described.

Expected behavior: Gamepad 0 and 1 would control one player (P0)

Actual behavior: Gamepad 0 controls two players (P0 and P1)

Documented in this video at timecode 32:11

calc

by Dir3kt

Cart #calc-2 | 2024-03-23 | Embed ▽ | License: CC4-BY-NC-SA

7

A tiny calculator that even makes sounds.

Type load #calc to make maths great again!

I don't have an image but been consistently using the mac zip 0.1.b zip version.

Randomly Picotron will crash. Doesn't seem to say anything or have any alerts/messages, just closes.

Have to reopen Picotron and reload my saved cart to begin work again.

Picotron is awesome btw! Thank you for making it.