Need help with lua? - LunaLua General Help

[Marioman2007]

Does "if sectionIdx == 1 then" work for your case?

[Just_Thomas]

Does "if sectionIdx == 1 then" work for your case?

I was THAT close? Eeeeh... yes, this does the trick, I just checked and tested.
Thanks and BTW: Forgot about you in that moment, you also helped me quite a lot. (:

[mariobrigade2018]

How do I make RNG non-inclusive?

[Just_Thomas]

Is it actually possible to work with something like this? (Hint: It is not actual real working code, it is only written that way so that it is immediately clear what I mean/try to say):

Code: Select all

function onStart()

	if checkpoint1:collect() == true then
     ...
	end
end

During normal gameplay, the SMW-typical checkpoint is saved as "activated", so I'm wondering whether you could work with something like this and query it at the start of the game.
Since I have too little knowledge, I hope someone from the development team can tell me briefly and concisely whether this works.

[deice]

During normal gameplay, the SMW-typical checkpoint is saved as "activated", so I'm wondering whether you could work with something like this and query it at the start of the game.

you're probably looking for something like this:

Code: Select all

function onStart()
	local c = Checkpoint.getActive()
	-- the variable c now holds a reference to the active checkpoint object, or nil if there's no active checkpoint in the current level
	if(c) then
		-- execute code here if the checkpoint exists
	end
end

unfortunately i don't think the checkpoint class documentation is finished, but if memory serves me right you should be able to at least poll for its position and section.

[Just_Thomas]

During normal gameplay, the SMW-typical checkpoint is saved as "activated", so I'm wondering whether you could work with something like this and query it at the start of the game.

you're probably looking for something like this:

Code: Select all

function onStart()
	local c = Checkpoint.getActive()
	-- the variable c now holds a reference to the active checkpoint object, or nil if there's no active checkpoint in the current level
	if(c) then
		-- execute code here if the checkpoint exists
	end
end

unfortunately i don't think the checkpoint class documentation is finished, but if memory serves me right you should be able to at least poll for its position and section.

First, thanks for your reply as usual.
Actually I wouldn`t have guessed the docu is NOT finished (so it is updated to beta 5 as stated on the "welcome Screen" but old stuff is still missing?).

Code: Select all

local checkpoints = require("checkpoints")
local cp1 = checkpoints.create{x = -103104, y = -100128, section = 5}

So, I had a checkpoint already (still thanking Emral for telling me how to do that).

ok, I then adapted the code for my test:

Code: Select all

function onStart()

	local c1 = cp1.getActive()
	-- the variable c now holds a reference to the active checkpoint object, or nil if there's no active checkpoint in the current level
	if(c1) then
		Routine.run(VineInSky)
	end
	
...
	

(yes, the routine mentioned does exist as well and does work properly)
Just starting the level gives me this error

[deice]

Just starting the level gives me this error

this is because you're calling "getActive" on an already-instanced checkpoint instead of statically on the Checkpoint class. the code i posted is meant to be used verbatim; getActive will return the currently active checkpoint within the level, whichever one that may be.

[Marioman2007]

Checkpoint.getActive() returns the currently active checkpoint.
Try this code and see if it works as intended.

Code: Select all

local cp1 = Checkpoint{x = -103104, y = -100128, section = 5}

function onStart()
	if Checkpoint.getActive() == cp1 then
		Routine.run(VineInSky)
	end
end

[Just_Thomas]

this is because you're calling "getActive" on an already-instanced checkpoint instead of statically on the Checkpoint class. the code i posted is meant to be used verbatim; getActive will return the currently active checkpoint within the level, whichever one that may be.

Checkpoint.getActive() returns the currently active checkpoint.
Try this code and see if it works as intended.

It's kind of funny, now that you see it, it kind of makes sense. If CP1 is the active checkpoint, then do that... yes, you're always smarter afterwards.
Unfortunately, after an intensive thinking phase (I actually really mean it ), I came to the realization that this is not at all useful for the implementation of my solution approach at all (sorry to both of you).
That is because I already made use of

Code: Select all

function onStart()
...
	if player.x == ... and player.section == ... then
	--do stuff
	end
...

The thing is I still have my other project in the pipeline where I wanted the show the player some kind of "intro image" at the beginning (SMB1 you know).
Yes, Emral might remember - if you read it. To be honest however it did not work out well and caused annoying random bugs here and there (sometimes the intro image did not appear in the first place e.g.).


Anyway: I figured a solution, it looks terrible, you might laugh and shake your head, facepalm and whatever. But it seems to work (Hint: If there is a LESS complicated way to realize it, please tell me)
I was surprised BTW it is not possible to create a warp like creating a checkpoint, at least I could not find anything like that.

Code: Select all

--------------------------------------------------
-- Level code
-- Created 16:34 2024-4-27
--------------------------------------------------

local checkpoints = require("checkpoints")
local cp1 = checkpoints.create{x = -179296, y = -180128, section = 1}
local cp2 = checkpoints.create{x = -177728, y = -180128, section = 1}

function onStart()

	local warpStart1Layer = Layer.get("warpStart1")
	local warpStart2Layer = Layer.get("warpStart2")
	local warpStart3Layer = Layer.get("warpStart3")
	warpStart1Layer:show(true)

	warpStart2Layer:hide(true)
	warpStart3Layer:hide(true)

	local warpCP1Layer = Layer.get("warpCheckpoint1")
	local warpCP2Layer = Layer.get("warpCheckpoint2")
	warpCP1Layer:hide(true)
	warpCP2Layer:hide(true)

--checkpoint 1
	if player.x == -179308 and player.section == 1 then
	Routine.run(checkPoint1R)
	end
--checkpoint 2
	if player.x == -177740 and player.section == 1 then
	Routine.run(checkPoint2R)
	end
end


function onTick()
	--Text.print(player.x, 100, 100)
end


function checkPoint1R()
	local warpCP1Layer = Layer.get("warpCheckpoint1")
	warpCP1Layer:show(true)
	local warpStart2Layer = Layer.get("warpStart2")
	local warpStart1Layer = Layer.get("warpStart1")
	warpStart2Layer:show(true)
	warpStart1Layer:hide(true)
	Routine.waitSeconds(1.0, true)
	warpCP1Layer:hide(true)
end

function checkPoint2R()
	local warpCP2Layer = Layer.get("warpCheckpoint2")
	warpCP2Layer:show(true)
	local warpStart3Layer = Layer.get("warpStart3")
	local warpStart1Layer = Layer.get("warpStart1")
	warpStart3Layer:show(true)
	warpStart1Layer:hide(true)
	Routine.waitSeconds(1.0, true)
	warpCP2Layer:hide(true)
end

Also as a download here:
https://file.io/LaR8glu3ZVHw
or
https://www.file-upload.net/download-15 ... f.zip.html
or
https://fastupload.io/TQrQnRQi1NO0aON/file

Edit: Ok, it was NOT for nothing as this is a little bit less complicated indeed

Code: Select all

...
--checkpoint 1
	if Checkpoint.getActive() == cp1 then
	Routine.run(checkPoint1R)
	end
--checkpoint 2
	if Checkpoint.getActive() == cp2 then
	Routine.run(checkPoint2R)
	end
...

works the same

[Mesi]

Hi! I'm trying to create some particles effects for my project and I keep getting this error :/



I'm following a pretty "simple" tutorial I found (https://www.youtube.com/watch?v=yZbT10G ... nnel=Emral) and I'm stuck literally at the second point ahahah

Like the tutorial says I'm using the template for particles effect called "particles_example.ini" that can be found in the templates folder (but it's like it can't be read)

I wrote this in my luna.lua file:

Code: Select all

local particles = require("particles")
local sparkleEmitter = particles.Emitter(0, 0, "particles_example.ini")

function onStart()
	sparkleEmitter:Attach(player)
end

Thank you for the help!

[InternetPeasent]

In a library, I'm trying to run a bit of code only when the player gets a specific exit type. First I tried registering the event in onInitAPI() like this:

Code: Select all

registerEvent(progDifficulty, 7, "onExitLevel")

However, the event refused to work, even when I got the specified exit type. I also tried checking for the exit type instead, in an if statement like so:

Code: Select all

function progDifficulty.onExitLevel()
    if Level.endState() == 6 then
	    SaveData.Difficulty = SaveData.Difficulty + 1
    end
end

...but that didn't work either. I'm also positive I'm not getting win types and end states mixed up. Does anyone know what I might be doing wrong?

[Marioman2007]

In a library, I'm trying to run a bit of code only when the player gets a specific exit type. First I tried registering the event in onInitAPI() like this:

Code: Select all

registerEvent(progDifficulty, 7, "onExitLevel")

However, the event refused to work, even when I got the specified exit type. I also tried checking for the exit type instead, in an if statement like so:

Code: Select all

function progDifficulty.onExitLevel()
    if Level.endState() == 6 then
	    SaveData.Difficulty = SaveData.Difficulty + 1
    end
end

...but that didn't work either. I'm also positive I'm not getting win types and end states mixed up. Does anyone know what I might be doing wrong?

The way you're registering the event is wrong

Code: Select all

registerEvent(progDifficulty, "onExitLevel")

function progDifficulty.onExitLevel(w)
    if w == 6 then
	    SaveData.Difficulty = SaveData.Difficulty + 1
    end
end

[InternetPeasent]

In a library, I'm trying to run a bit of code only when the player gets a specific exit type. First I tried registering the event in onInitAPI() like this:

Code: Select all

registerEvent(progDifficulty, 7, "onExitLevel")

However, the event refused to work, even when I got the specified exit type. I also tried checking for the exit type instead, in an if statement like so:

Code: Select all

function progDifficulty.onExitLevel()
    if Level.endState() == 6 then
	    SaveData.Difficulty = SaveData.Difficulty + 1
    end
end

...but that didn't work either. I'm also positive I'm not getting win types and end states mixed up. Does anyone know what I might be doing wrong?

The way you're registering the event is wrong

Code: Select all

registerEvent(progDifficulty, "onExitLevel")

function progDifficulty.onExitLevel(w)
    if w == 6 then
	    SaveData.Difficulty = SaveData.Difficulty + 1
    end
end

Thank you, this got the code working!

[andrei312g]

So you're trying to get into LunaLua but
1) Don't know where to get started?
2) Have a question?

LOOK NO FURTHER THAN THIS THREAD!
Version 2.0

How to get started
LunaLua is SMBX2's programming language, so if you don't have SMBX2 in any capacity, you can download the most recent version from:
http://codehaus.wohlsoft.ru/downloads.html

If you're new to LunaLua, I suggest checking out my lua tutorials. I also recommend taking a look at the generic lua tutorial for a more technical focus on the language.

If you're looking for documentation of any kind, you're going to find it here.
The documentation above is not perfectly up-to-date at the current point in time, however, so for things not documented please take a look at the Handbook, or into the script files of the libraries you are trying to access.
We're working on getting a proper documentation set up in the coming months.

Do you have a question?

If you have a question about why your code isn't working or how to optimize something you've been working on, just reply in this thread. If you feel like your issue is major and are afraid it'll drag on over several pages or get lost, don't hesitate to make a topic about it in the forum, though.
There are many people who are experienced in lunalua (myself included) who're glad to help you out.

Just make sure that you provide enough information on your issue so we can help you. Taking a screenshot of the error message (if there is one) or posting your code using the "code" bbcode or using http://hastebin.com/ are things you should always do. If your code is long and you are getting an error, make sure to specify which lines the error is tied to (and post to hastebin rather than using the bbcode, because hastebin has line numbers). (To find which line an error appears in, look at the number at the end of the directory in the first line of the error message, or just post a picture of the error along with the code).

With that out of the way, if you have any questions regarding how to do something in lua or regarding your lua code, this is the place to go.

Hello! I downloaded the SMBX2 (SMBX2b5p2 version) on a new laptop and I have a problem with the scripts. I am trying to load an HUD script downloaded from LunaLUA forum on a game that I'm working on and it's not working with the new versions. I tried the script on SMBX 2.0 Beta 3 version and it worked, but it's not working on newer versions, such as SMBX2b5p2 version that I'm using right now. How can I load this script on the SMBX2b5p2 version (this version that I have right now: latest version)?

Here is the log that it gave me:

Code: Select all

==> E:\SMBX2\data/scripts/base/engine/require.lua:118: module 'minHUD' not found
=============
stack traceback:
              E:\SMBX2\data/scripts/base/engine/require.lua:118: in function 'require'
              ...(*game (folder) that I'm working on*)/luna.lua:2: in function 'codeFile'
              main.lua:742: in function 'loadCodeFile'
              main.lua:888: in function <main.lua:792> [C]: in function '__xpcall'
              main.lua:792: in function <main.lua:791>

I tried with the SMB3 overhaul HUD script too.
The log that it gave me when I tried to load:

Code: Select all

==> scripts/base/engine/ffi_npc.lua:280: Invalid NPC index (11)
=============
stack traceback:
               scripts/base/engine/ffi_npc.lua:280: in function 'NPC'
               scripts/smb3overhaul.lua:50: in function 'func'
               E:\SMBX2\data/scripts/base/engine/require.lua:150: in function 'require'
               ...(*game (folder) that I'm working on*)/luna.lua:2: in function 'codeFile'
               main.lua:742: in function 'loadCodeFile'
               main.lua:888: in function <main.lua:792> [C]: in function '__xpcall'
               main.lua:792: in function <main.lua:791>

Can you help me fix this problem?

[mariobrigade2018]

Here is the log that it gave me:

Code: Select all

==> E:\SMBX2\data/scripts/base/engine/require.lua:118: module 'minHUD' not found
=============
stack traceback:
              E:\SMBX2\data/scripts/base/engine/require.lua:118: in function 'require'
              ...(*game (folder) that I'm working on*)/luna.lua:2: in function 'codeFile'
              main.lua:742: in function 'loadCodeFile'
              main.lua:888: in function <main.lua:792> [C]: in function '__xpcall'
              main.lua:792: in function <main.lua:791>

The log that it gave me when I tried to load:

Code: Select all

==> scripts/base/engine/ffi_npc.lua:280: Invalid NPC index (11)
=============
stack traceback:
               scripts/base/engine/ffi_npc.lua:280: in function 'NPC'
               scripts/smb3overhaul.lua:50: in function 'func'
               E:\SMBX2\data/scripts/base/engine/require.lua:150: in function 'require'
               ...(*game (folder) that I'm working on*)/luna.lua:2: in function 'codeFile'
               main.lua:742: in function 'loadCodeFile'
               main.lua:888: in function <main.lua:792> [C]: in function '__xpcall'
               main.lua:792: in function <main.lua:791>

Looks like you’re missing a require call somewhere in your first message. And SMB3override is super ancient code, which is why it doesn’t work.

Also why did you quote the entire first message of the topic? That wasn’t necessary.

[andrei312g]

Here is the log that it gave me:

Code: Select all

==> E:\SMBX2\data/scripts/base/engine/require.lua:118: module 'minHUD' not found
=============
stack traceback:
              E:\SMBX2\data/scripts/base/engine/require.lua:118: in function 'require'
              ...(*game (folder) that I'm working on*)/luna.lua:2: in function 'codeFile'
              main.lua:742: in function 'loadCodeFile'
              main.lua:888: in function <main.lua:792> [C]: in function '__xpcall'
              main.lua:792: in function <main.lua:791>

The log that it gave me when I tried to load:

Code: Select all

==> scripts/base/engine/ffi_npc.lua:280: Invalid NPC index (11)
=============
stack traceback:
               scripts/base/engine/ffi_npc.lua:280: in function 'NPC'
               scripts/smb3overhaul.lua:50: in function 'func'
               E:\SMBX2\data/scripts/base/engine/require.lua:150: in function 'require'
               ...(*game (folder) that I'm working on*)/luna.lua:2: in function 'codeFile'
               main.lua:742: in function 'loadCodeFile'
               main.lua:888: in function <main.lua:792> [C]: in function '__xpcall'
               main.lua:792: in function <main.lua:791>

Looks like you’re missing a require call somewhere in your first message. And SMB3override is super ancient code, which is why it doesn’t work.

Also why did you quote the entire first message of the topic? That wasn’t necessary.

I only typed this for minHUD. I don't know what's missing.

[mariobrigade2018]

Here is the log that it gave me:

Code: Select all

==> E:\SMBX2\data/scripts/base/engine/require.lua:118: module 'minHUD' not found
=============
stack traceback:
              E:\SMBX2\data/scripts/base/engine/require.lua:118: in function 'require'
              ...(*game (folder) that I'm working on*)/luna.lua:2: in function 'codeFile'
              main.lua:742: in function 'loadCodeFile'
              main.lua:888: in function <main.lua:792> [C]: in function '__xpcall'
              main.lua:792: in function <main.lua:791>

The log that it gave me when I tried to load:

Code: Select all

==> scripts/base/engine/ffi_npc.lua:280: Invalid NPC index (11)
=============
stack traceback:
               scripts/base/engine/ffi_npc.lua:280: in function 'NPC'
               scripts/smb3overhaul.lua:50: in function 'func'
               E:\SMBX2\data/scripts/base/engine/require.lua:150: in function 'require'
               ...(*game (folder) that I'm working on*)/luna.lua:2: in function 'codeFile'
               main.lua:742: in function 'loadCodeFile'
               main.lua:888: in function <main.lua:792> [C]: in function '__xpcall'
               main.lua:792: in function <main.lua:791>

Looks like you’re missing a require call somewhere in your first message. And SMB3override is super ancient code, which is why it doesn’t work.

I only typed this for minHUD. I don't know what's missing.

Where is minHUD located?

[andrei312g]

Looks like you’re missing a require call somewhere in your first message. And SMB3override is super ancient code, which is why it doesn’t work.

I only typed this for minHUD. I don't know what's missing.

Where is minHUD located?

here in scripts folder

[mariobrigade2018]

I only typed this for minHUD. I don't know what's missing.

Where is minHUD located?

here in scripts folder

That looks like the basegame scripts folder. Don’t put it there. Put it in the same place as where the luna.lua file is.

[jokyaku]

Hello! I'm currently just finishing a custom NPC and I was wondering if there was any way of using Extra Settings to alter an NPC Config such as nofireball or jumphurt.