Need help with lua? - LunaLua General Help

[Hoeloe]

The field doesn't work cause you set the shader and uniforms to an empty shader. The handbook details the default properties for these fields so if you don't wanna overwrite any you dont need to specify them at all.

It's as Enjl says. You should also probably just use darkness.addLight, since that will add the light to all darkness fields, and is less of a special case.

In fact, for this particular darkness field, I don't think you actually need to specify anything, since you're using entirely default values. Just darkness.create{} should do the job.

[DrMekar]

darknessField is a variable which you can name anything, though if you're familiar with programming I would avoid reserved symbols like ,.-+*/%"' etc...

The field doesn't work cause you set the shader and uniforms to an empty shader. The handbook details the default properties for these fields so if you don't wanna overwrite any you dont need to specify them at all.

okay, so that makes alot of sense xD. But where do I put the missing comma, if not behind nil or true

[Emral]

darknessField is a variable which you can name anything, though if you're familiar with programming I would avoid reserved symbols like ,.-+*/%"' etc...

The field doesn't work cause you set the shader and uniforms to an empty shader. The handbook details the default properties for these fields so if you don't wanna overwrite any you dont need to specify them at all.

okay, so that makes alot of sense xD. But where do I put the missing comma, if not behind nil or true

The error message told you that it expected the declaration to end where it found "boundLength", so perhaps after the previous argument? Though you r eally don't have to specify either of these in the first place, so by cleaning up your code the error will just go away.

[DrMekar]

darknessField is a variable which you can name anything, though if you're familiar with programming I would avoid reserved symbols like ,.-+*/%"' etc...

The field doesn't work cause you set the shader and uniforms to an empty shader. The handbook details the default properties for these fields so if you don't wanna overwrite any you dont need to specify them at all.

okay, so that makes alot of sense xD. But where do I put the missing comma, if not behind nil or true

The error message told you that it expected the declaration to end where it found "boundLength", so perhaps after the previous argument? Though you r eally don't have to specify either of these in the first place, so by cleaning up your code the error will just go away.

Still the same message

[Emral]

You haven't really taken any of hoeloe and I's advice either, so no surprise there.


The field doesn't work cause you set the shader and uniforms to an empty shader. The handbook details the default properties for these fields so if you don't wanna overwrite any you dont need to specify them at all.

You should also probably just use darkness.addLight, since that will add the light to all darkness fields, and is less of a special case.

In fact, for this particular darkness field, I don't think you actually need to specify anything, since you're using entirely default values. Just darkness.create{} should do the job.

[DrMekar]

You haven't really taken any of hoeloe and I's advice either, so no surprise there.


The field doesn't work cause you set the shader and uniforms to an empty shader. The handbook details the default properties for these fields so if you don't wanna overwrite any you dont need to specify them at all.

You should also probably just use darkness.addLight, since that will add the light to all darkness fields, and is less of a special case.

In fact, for this particular darkness field, I don't think you actually need to specify anything, since you're using entirely default values. Just darkness.create{} should do the job.

Well, Now it works. I'm not entirely sure what advises you mean thougth.
Thanks never the less

Added in 1 hour 50 minutes 37 seconds:
I hate to ask again, but this time it isen't a stupid question I hope
I want to attach the Red Light to Cleeyores (The Flying Grey Boss NPC). I used the BG Mechanic you showed in the tutrorial and it worked fine, but
obviously only at her spawn point, so I wondered if it is possible to make the light follow her.

This is how the lua looks currently if necessary.

[Draex]

What would I use if I want the platform to change color when simply touched by the player, instead of just when stood on?

[Emral]

https://docs.google.com/spreadsheets/d/ ... edit#gid=0

What would I use if I want the platform to change color when simply touched by the player, instead of just when stood on?

Set a variable on the NPC when the NPC is first touched.

Load pnpc, check if player.standingNPC exists and is of the correct ID, and then
local touchedNPC = pnpc.wrap(player.standingNPC)
touchedNPC.data.touched = true

Then you can use a for loop over NPCs of that ID in onDraw, wrap them again, and change their rendered frame by setting its animationFrame

[DrMekar]

https://docs.google.com/spreadsheets/d/ ... edit#gid=0

What would I use if I want the platform to change color when simply touched by the player, instead of just when stood on?

Set a variable on the NPC when the NPC is first touched.

Load pnpc, check if player.standingNPC exists and is of the correct ID, and then
local touchedNPC = pnpc.wrap(player.standingNPC)
touchedNPC.data.touched = true

Then you can use a for loop over NPCs of that ID in onDraw, wrap them again, and change their rendered frame by setting its animationFrame

Okay, Thanks

[Hoeloe]

I used the BG Mechanic you showed in the tutrorial and it worked fine, but
obviously only at her spawn point, so I wondered if it is possible to make the light follow her.

This is how the lua looks currently if necessary.

Well, you never actually told the light to follow anything, you just put it at the same location as the npc.

Really, if you want an npc to have a light on it, you should use npc.txt files rather than lua. You can just add:

Code: Select all

lightbrightness=1
lightcolor=red
lightradius=128

To the npc.txt for your npc, and that will automatically give it a light.

[FluffyMeatloaf]

Soooo I haven't dabbled in lua before. Heard a bunch about it, saw some neat stuff in a previous contest... and in light of recent going-ons I was curious if lua could do a thing, that thing being modifications to the music packaged with the engine?

Now I watched Enjl's tutorial on music related bits and that's pretty handy for doing the intros and loops, but I'm thinking of something that just the lua would do, if possible. Things like raising pitch, slowing tempo, playing backwards, that kinda thing? I think my main thought behind this is a way to save on file size, because instead of adding custom tunes one could just rework what's already there to have something that sounds different? Sorta like what they did with Pokemon cries in the first Pokemon games... though that might be a poor example for something based on Mario.

Apologies if any of that's hard to follow, or sounds rude. I meant to bring up something like this for a bit now and just kinda... lost track of time. Argh.

[DrMekar]

I used the BG Mechanic you showed in the tutrorial and it worked fine, but
obviously only at her spawn point, so I wondered if it is possible to make the light follow her.

This is how the lua looks currently if necessary.

Well, you never actually told the light to follow anything, you just put it at the same location as the npc.

Really, if you want an npc to have a light on it, you should use npc.txt files rather than lua. You can just add:

Code: Select all

lightbrightness=1
lightcolor=red
lightradius=128

To the npc.txt for your npc, and that will automatically give it a light.

Well that's really nice to know. I'll defenitly give my Custom a Green Light with this too. Thanks again

[Hoeloe]

Soooo I haven't dabbled in lua before. Heard a bunch about it, saw some neat stuff in a previous contest... and in light of recent going-ons I was curious if lua could do a thing, that thing being modifications to the music packaged with the engine?

Now I watched Enjl's tutorial on music related bits and that's pretty handy for doing the intros and loops, but I'm thinking of something that just the lua would do, if possible. Things like raising pitch, slowing tempo, playing backwards, that kinda thing? I think my main thought behind this is a way to save on file size, because instead of adding custom tunes one could just rework what's already there to have something that sounds different? Sorta like what they did with Pokemon cries in the first Pokemon games... though that might be a poor example for something based on Mario.

Apologies if any of that's hard to follow, or sounds rude. I meant to bring up something like this for a bit now and just kinda... lost track of time. Argh.

Sadly, one of the biggest limitations of SMBX at the moment is its audio engine. We don't currently have a way to modify the pitch or tempo of music tracks, or play multiple tracks at once.

Added in 1 minute 9 seconds:

Well that's really nice to know. I'll defenitly give my Custom a Green Light with this too. Thanks again

Also, I did mention you should use

darkness.addLight

rather than

darknessField:addLight

It won't make much of a difference in the current setup, but it's generally better practice.

[DrMekar]

Soooo I haven't dabbled in lua before. Heard a bunch about it, saw some neat stuff in a previous contest... and in light of recent going-ons I was curious if lua could do a thing, that thing being modifications to the music packaged with the engine?

Now I watched Enjl's tutorial on music related bits and that's pretty handy for doing the intros and loops, but I'm thinking of something that just the lua would do, if possible. Things like raising pitch, slowing tempo, playing backwards, that kinda thing? I think my main thought behind this is a way to save on file size, because instead of adding custom tunes one could just rework what's already there to have something that sounds different? Sorta like what they did with Pokemon cries in the first Pokemon games... though that might be a poor example for something based on Mario.

Apologies if any of that's hard to follow, or sounds rude. I meant to bring up something like this for a bit now and just kinda... lost track of time. Argh.

Sadly, one of the biggest limitations of SMBX at the moment is its audio engine. We don't currently have a way to modify the pitch or tempo of music tracks, or play multiple tracks at once.

Added in 1 minute 9 seconds:

Well that's really nice to know. I'll defenitly give my Custom a Green Light with this too. Thanks again

Also, I did mention you should use

darkness.addLight

rather than

darknessField:addLight

It won't make much of a difference in the current setup, but it's generally better practice.

Will do that if needed

[FluffyMeatloaf]

Sadly, one of the biggest limitations of SMBX at the moment is its audio engine. We don't currently have a way to modify the pitch or tempo of music tracks, or play multiple tracks at once.

Well, farts. Glad I asked, though. Thanks for letting me know!

[Chipss]

Hello. I am not sure if this is allowed in this thread, but I was just wondering if there was currently any .lua for a dragon coin counter on the HUD? I couldn't seem to find one myself, but I may be missing something.

If not, I may just learn LunaLua and figure it all out on my own.

Thanks for any help!

[Emral]

A similar feature is programmed in this episode of lua tutorials.
https://www.youtube.com/watch?v=7QLdRTkpTrQ
It can be easily adapted to an onscreen counter.

[Draex]

What would I use if I want the platform to change color when simply touched by the player, instead of just when stood on?

Set a variable on the NPC when the NPC is first touched.

Load pnpc, check if player.standingNPC exists and is of the correct ID, and then
local touchedNPC = pnpc.wrap(player.standingNPC)
touchedNPC.data.touched = true

Then you can use a for loop over NPCs of that ID in onDraw, wrap them again, and change their rendered frame by setting its animationFrame

I looked through the docs but I'm not sure I'm clear on how to set animation frames.

Here's what I have so far. It's my lunadll file. https://paste.mod.gg/olegifaroh.rb Due to some complications I'm having with the computer I'm using right now I am incapable of testing that code to see if it works or not, but does it look to be on the right track?

[Draex]

Actually I'm not sure I was quite clear enough when I said I wanted the platform to change color when touched by the player. I don't just mean when stood on, I mean when touched from any side, like below, for instance.

[Quantumenace]

I'm trying to load a lua file from the luna.lua file like it is the actual luna.lua file. require() loads it but the events don't get registered. This looks like it works:

Code: Select all

for i,v in pairs(Misc.LUNALUA_EVENTS) do EventManager.userListeners[1][v]=_G[v] end

but I think that would replace the events in the luaworld file or whatever. I'd try to use _ENV[v]=_G[v] but _ENV returns nil. Any ideas?