How do i learn lua, (what are good places to learn)

i tried learning c# first but quit, python is decent but i want this one, what are good websites or videos to learn it. im tryna help my friends on making a game (not roblox)

https://redd.it/1dve2nw
@r_lua

Optional function annotation?

I can't seem to figure out how to mark a function as optional, here is a short example:

---@meta
---@class FrameContainer
---@field Frame table the container frame.
---@field Type number the type of frames this container holds.
---@field LayoutType number the layout type to use when arranging frames.
---@field FramesOffset fun(self: table): Offset? any offset to apply for frames within the container.
---@field GroupFramesOffset fun(self: table): Offset? any offset to apply for frames within a group.

I wish to make the FramesOffset and GroupFramesOffset functions nullable/optional but unsure how. I've tried adding a "?" in various locations but it results in a syntax error.

https://redd.it/1dvlquc
@r_lua

Resetting system state in between luaunit tests

I have a bunch of automated tests that end up modifying system state. I'm manually unwinding state changes inside my `teardown()` function however it's very bothersome to do this and I have a feeling not all changes are being reset.

My question is: is there a nicer way to reset state during tests? I suppose I could run a separate lua process for every single test but hoping there is a cleaner solution?

Here is the source code: https://github.com/Verubato/framesort/blob/main/tests/Test.lua

https://redd.it/1dvq92x
@r_lua

please help with my orientation issue on a roblox lua game
https://redd.it/1dx6uda
@r_lua

Phase angle Vs Torque for IPM Motor in FEMM

I have a IPM motor modeled in FEMM and I am trying to get a graph of phase angle Vs torque.

I have been unable to find any sample code for this, does anyone have any suggestions on where to start?

https://redd.it/1dyeonx
@r_lua

how to find libssl.so in lua?

i try http lib in a luarocks project，

but occurred a problem with libssl.so not found

❯ bfs -type f -name *libssl* /usr/
bfs: warning: Failed to set locale: No such file or directory

/usr/lib/x86_64-linux-gnu/libssl.so.1.1
/usr/lib/x86_64-linux-gnu/libssl3.so
/usr/lib/x86_64-linux-gnu/libssl.so.3
/usr/lib/x86_64-linux-gnu/libssl.a
/usr/lib/x86_64-linux-gnu/pkgconfig/libssl.pc

❯ lua -l src/setup src/main.lua
lua: error loading module '_cqueues' from file 'lua_modules/lib/lua/5.4/_cqueues.so':
        libssl.so.3: cannot open shared object file: No such file or directory
stack traceback:
        [C]: in ?
        [C]: in function 'require'
        lua_modules/share/lua/5.4/cqueues/auxlib.lua:2: in function <lua_modules/share/lua/5.4/cqueues/auxlib.lua:1>
        (...tail calls...)
        [C]: in function 'require'
        lua_modules/share/lua/5.4/http/client.lua:1: in main chunk
        [C]: in function 'require'
        lua_modules/share/lua/5.4/http/request.lua:5: in main chunk
        [C]: in function 'require'
        src/main.lua:1: in main chunk
        [C]: in ?

https://redd.it/1dytgdv
@r_lua

can somepone help me fix this noscript local tool = noscript.Parent
local debounce = false -- To prevent rapid clicking

tool.Activated:Connect(function()
if not debounce then
debounce = true

-- Create a clone of the tool
local clone = tool:Clone()
clone.Pare



https://redd.it/1dyx5xd
@r_lua

Problem generating consistent heightmaps using simplex noise

Example images:

https://preview.redd.it/0rq64777ogbd1.png?width=777&format=png&auto=webp&s=21c7696b6e65289f55ac7227c699880a18133f6d

https://preview.redd.it/1swmq0jcogbd1.png?width=777&format=png&auto=webp&s=d89921594d376ebd5a44ff244321081e4b956e8e

https://preview.redd.it/y5fbmybdogbd1.png?width=777&format=png&auto=webp&s=a3e84ed077815bceada1c78a2897ff295b6c6fc8

I'm trying to generate a 2d terrain from a heightmap created by simplex noise.

The use case is a map that is endlessly traversable in all directions,

so I have copied the source code from this tutorial project [https://www.youtube.com/watch?v=Z6m7tFztEvw&t=48s](https://www.youtube.com/watch?v=Z6m7tFztEvw&t=48s)

and altered it to run in the Solar2d SDK ( don't think my problem is API related )

Currently my project is set up to create 4 chunks, my problem is they have incosistencies. When generating the heightmaps with 1 octave they are consistent, so the problem is caused by having multiple octaves, but I can't figure out why or how to work around it.

I know this is quite an extensive ask, but I'm hoping someone here has experience working with noise and could offer some suggestions. Any pointers are greatly appreciated.



simplex.lua:

[https://github.com/weswigham/simplex/blob/master/lua/src/simplex.lua](https://github.com/weswigham/simplex/blob/master/lua/src/simplex.lua)



tilemap.lua:

local M = {}

local inspect = require("libs.inspect")
local simplex = require("simplex")
local util = require("util")

-- grid
local chunkSize = 50
local width = chunkSize
local height = chunkSize
local seed
local grid

-- vars
local height_max = 20
local height_min = 1
local amplitude_max = height_max / 2
local frequency_max = 0.030
local octaves = 3
local lacunarity = 2.0
local persistence = 0.5
local ini_offset_x
local ini_offset_y

-- aesthetic
local rectSize = 10
local blackDensity = 17
local greyDensity = 10

-- draw chunk from grid
local function draw(iniX, iniY)
for i = 1, height do
for j = 1, width do
local rect = display.newRect(iniX+rectSize*(j-1), iniY+rectSize*(i-1), rectSize, rectSize)
if grid[i][j] > blackDensity then
rect:setFillColor(0)
elseif grid[i][j] > greyDensity and grid[i][j] <= blackDensity then
rect:setFillColor(0.5)
end
end
end
end

-- fill grid with height values
local function fractal_noise(pos_x, pos_y)

math.randomseed(seed)

local offset_x = ini_offset_x+pos_x
local offset_y = ini_offset_x+pos_y

for i = 1, height do
for j = 1, width do
local noise = height_max / 2
local frequency = frequency_max
local amplitude = amplitude_max
for k = 1, octaves do
local sample_x = j * frequency + offset_x
local sample_y = i * frequency + offset_y

noise = noise + simplex.Noise2D(sample_x, sample_y) * amplitude
frequency = frequency * lacunarity
amplitude = amplitude * persistence
end
noise = util.clamp(height_min, height_max, util.round(noise))
grid[i][j] = noise
end
end
end

local function iniSeed()
seed = 10000
ini_offset_x = math.random(-999999, 999999)
ini_offset_y = math.random(-999999, 999999)
end

local function init()
iniSeed()
grid = util.get_table(height, width, 0)

-- dist= frequency_max * 50
local dist = frequency_max * chunkSize

-- generate 4 chunks
fractal_noise(0, 0)
draw(0, 0)
fractal_noise(dist, 0)
draw(rectSize*chunkSize, 0)
fractal_noise(0, dist)
draw(0,

rectSize*chunkSize)
fractal_noise(dist, dist)
draw(rectSize*chunkSize, rectSize*chunkSize)

end

init()


return M


util.lua:

local util = {}

function util.get_table(rows, columns, value)
local result = {}
for i = 1, rows do
table.insert(result, {})
for j = 1, columns do
table.insert(result[i], value)
end
end
return result
end

function util.round(value)
local ceil = math.ceil(value)
local floor = math.floor(value)
if math.abs(ceil - value) > math.abs(value - floor) then
return floor
end
return ceil
end

function util.clamp(min, max, value)
if value < min then
return min
end
if value > max then
return max
end
return value
end

function util.is_within_bounds(width, height, x, y)
return 0 < x and x <= width and 0 < y and y <= height
end

util.deque = {}

function util.deque.new()
return { front = 0, back = -1 }
end

function util.deque.is_empty(deque)
return deque.front > deque.back
end

function util.deque.front(deque)
return deque[deque.front]
end

function util.deque.back(deque)
return deque[deque.back]
end

function util.deque.push_front(deque, value)
deque.front = deque.front - 1
deque[deque.front] = value
end

function util.deque.pop_front(deque)
if deque.front <= deque.back then
local result = deque[deque.front]
deque[deque.front] = nil
deque.front = deque.front + 1
return result
end
end

function util.deque.push_back(deque, value)
deque.back = deque.back + 1
deque[deque.back] = value
end

function util.deque.pop_back(deque)
if deque.front <= deque.back then
local result = deque[deque.back]
deque[deque.back] = nil
deque.back = deque.back - 1
return result
end
end

return util

https://redd.it/1dyy3xd
@r_lua

Is is possible to test if value is boolean while using only what is thought in chapter 1 of "Programming in Lua, 4th edition"

Exercise 1.6 of the book "Programming in Lua, 4th edition" asks how to check if value is a Boolean without using type. I came out with (value == true or value == false) and it works, but it uses == which has not been introduced so far.

When I learn (or relearn/revise) something in a book and do the exercises, I am very careful to only use what has been covered so far but I don't think that's possible in this case, am I missing something?



https://redd.it/1dz389o
@r_lua

Intercept and count JMS package size

Hi there, how would u guys count the packet size of a JMS TextMessage object.

I am intercepting a JMS message over TCP and I’d like to count the bytes of the message stream. Such that once it hits 10 bytes, I want to fire an if clause to break the loop and only forward the 10 bytes up to JMS.

Any ideas how I could count the bytes?

https://redd.it/1dzwo0f
@r_lua

Table size

How do I find the size of lua table in versioin 5.4.x? table.getn, setn and maxn seem to be gone. Is there a way to find the end without counting until nil is found?

Tnx

https://redd.it/1e04ll3
@r_lua

What is the proper way to run lua in VScode?

I'm just starting, and have already downloaded and installed lua. Currently, I type in the terminal lua54 and then the name of the file I want to run. Is there a way to run code dirctly from the text in the editor without first saving it to a file and running the file?

Any help would be appriciated

https://redd.it/1e05mqg
@r_lua

Can someone help me to decrypt the lua file?

Hello I need to decrypt the lua file. It is made for tibia noscript but its coded and i dont know what is inside. Please help me Download lua file here

https://redd.it/1e0c9h1
@r_lua

I need help with a bit of code, I'm using G Hub to get a noscript down and I just cannot seem for the life of me, to get this to work.

EnablePrimaryMouseButtonEvents(true);

function OnEvent(event, arg)

if (event == "PROFILE_ACTIVATED") then

profile = 1

numberOfProfiles = 8

up = 5

down = 4

end

if (IsKeyLockOn("capslock") == true) then

if (IsMouseButtonPressed(down) and profile > 1) then

profile = profile - 1;

end

if (IsMouseButtonPressed(up) and profile < numberOfProfiles) then

profile = profile + 1;

end

/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /

I'm not sure how much of it you'll need to see to get a grasp on it here, but I'm trying to get the buttons changed off of my mouse onto 'rshift' and 'rctrl'. I've tried to change it over to IsModifierPressed but I just cant figure it out. Please get back to me if you can help, I've been up trying to solve this on my own for 4 hours and no research is paying off. Thanks.

( P.S. If you need the whole code let me know and ill send the rest. )

https://redd.it/1e1bexu
@r_lua

psxlua -- Lua for PlayStation 1
https://github.com/grumpycoders/psxlua

https://redd.it/1e1uoqx
@r_lua

Help

I really want to learn lua for coding in Gmod but I don't really know where to start. Any help?

https://redd.it/1e25eao
@r_lua

the nothing language server

a small language server I made in 2 and a half hours or so that does nothing
https://gist.github.com/thacuber2a03/7285effd7ad6cec17e24a70fd30be467

https://redd.it/1e3ka4d
@r_lua

I want to learn how to code in lua.

I play a lot of Yu-Gi-Oh especially on EDOpro. That program allows you to make custom cards. The code for the cards is done in lua. I have no background in coding at all. I want to try to learn it so I can make my own cards. What is the best way for me to learn about coding in lua. Is lua a good start or should I learn a different programming language first?

https://redd.it/1e3oqwa
@r_lua

I get there's a lot of these but I need help to get an IDE for lua

ok so I used to code in python but I didn't really like it, in python I was using sublime text, so now I'm switching to Lua, but I'm basically still a newbie to coding, the reason why I'm switching to Lua specifically is just to mod tboi. I've looked online for information on how to code and I'll look more in depth about that later, but for now I need an IDE to program in lua so could anyone help me?

https://redd.it/1e3tuzv
@r_lua

Decryption / FXAP

Hi! I have obtained a FiveM Script which I need urgently to work but I'm scared to try it because it might be malicious. The problem: I can't check the code because it is encrypted. Pretty sure it has something to do with with FXAP because it says on the top as the only readdable code and there is also a .fxap file. Any idea/help? Rest of the files arent encrypted and look good. Thanks in advance.

my code :\/



https://redd.it/1e46wlz
@r_lua