LunaDLL/LunaLUA help thread

[Hoeloe]

Is this the same as the pNPC's "uid"?

No. It's absolutely NOT the same as pNPCs uid.

Basically, in SMBX, all enemies are kept in an array. The "index" is the position in that array that the enemy is found.

The problem is that when enemies are killed, they're removed from the array, and arrays can't have gaps, so unless the enemy is last in the array, a bunch of NPCs will then change their index.

What pNPC does is assign each NPC with a persistent UID (Unique Identifier), which is ONLY used for identifying the NPC, not for accessing the array. This allows you to find NPCs even if they change position in the array, as you can pick it out with the UID (since the UID never changes over the lifetime of the NPC).

What you'll want to do is find the NPC at the array index, which you can do using:

Code: Select all

local myNPC = NPC(index)

Then, if you call pnpc.wrap on that, it will give you the associated pNPC object, or create one if it doesn't exist.

[S1eth]

Thanks for the previous answer.

I have another question specifically about the worldToScreen function from colliders.lua .
I needed a function like that, so I just copied that one from colliders, and noticed that everything was a few pixels off.

So, my question is: why is it that whenever worldToScreen is used, it needs x - 10 and y + 10 as arguments?

[Imaynotbehere4long]

SAJewers and I are at a disagreement, and I've come here to get an arbiter to settle this:

Do sprite-swaps take the same amount of time to load as graphics loaded with Graphics.loadAnimatedImage, or does the latter load faster? I recommend testing with EoW8's animated zooms from Episode 1.

[Kevsoft]

Do sprite-swaps take the same amount of time to load as graphics loaded with Graphics.loadAnimatedImage?

It's a difficult because the loading code for loadAnimatedImage is similar to SMBX's one.

Here is how SMBX does it:
1.) Call the VB6 LoadImage function (probably big overhead here, because it is a VB6-Function)
2.) Make a device context for rendering
3.) Store it

Here is how LunaLua's loadAnimatedImage does it:
1.) Load the gif and extract every frame of the gif
2.) Make multiple device context for rendering (probably big overhead here, because of multiple device contexts)
3.) Store it.

The big advantage however is that you can call loadAnimatedImage anytime. Either in the start or in mid-game. So you could say: Load animated image X and run it. While images of X is running do loadAnimatedImage of Y.

[CloudyCloud]

1. Is there a way to make the player character float when they are holding item in the ocean? I am curious if such code is written already.

you know, SMW physics.(In SMW, player can float and thus swim faster when they hold item in the water.)

2. Possible to make only some item able to help player float on the water?
(For example, ice block. Well, you get the ice flower and then you freeze the monsters, then the frozen enemy-block will float up. And thus I am thinking that one should be able to float if they hold the frozen block also.)(I kinda want to make a swim ring.)

1st question is more to make a SMW water level.
2nd question is more for other reason.

Or actually 1st question is just extension of 2nd?

[Kevsoft]

LunaLua v0.7.2.1 has just been released. This is an important update because it fixes an exploit which manages to run assembler code on your computer throught lunadll.txt due to an exploit in the Autocode module.

Additional changes are:

* Extended NPC class
* Added cheat values. Some cheat can now be toggled by value. (Defines.* namespace)
* Added Audio.MusicArtistTag(), Audio.MusicAlbumTag() and Audio.MusicCopyrightTag() functions
* Added console class. You can now use the windows console for debugging. (See LunaLua command arguments at the wiki)
* Hotfix Bugfix [LunaLua]: Fixed ROP exploit at the Autocode module.

[SAJewers]

How do I change a variable that's in lunaworld.lua using lunadll.lua?
I have variable = "whatever" in lunadll.lua, but Text.print(variable,50,550) in lunaworldlua just prints nil (or whatever I set it to in lunaworld.lua).

EDIT NVM I Figured it out, use _G["variable"]

[Karatekid5]

I'm just making a simple code kinda like what Maglx2 does where an image will be displayed on-screen when a player is within certain coordinates. The code for the text runs just fine but it won't display the image. Did I set this up correctly?

Code:

Code: Select all

function onLoop()

if (player.x > -119306 and player.x < -119262 and player.y > -119974 and player.y <-119682) then
  Text.print("Olimaaaaaar",12,12)
  loadImage ("HUB/olimar.png", 1, 0xdc00ff)
  placeSprite(1, 1, 100, 100)
  end
end

[snoruntpyro]

If I remember correctly, printText/Text.print draws relative to the screen, while loadImage/Graphics.loadImage does not. I'm not sure how to solve this, though, sorry!!

[SAJewers]

Graphics.placeSrpite does draw relative to the screen. try this code:

Code: Select all

local overlay = Graphics.loadImage("//HUB/Olimar.png");

function onLoop()
	if (player.x > -119306 and player.x < -119262 and player.y > -119974 and player.y <-119682) then
		Text.print("Olimaaaaaar",12,12)
		Graphics.placeSprite(1, overlay, 100, 100)
	end
end

[Kevsoft]

You can draw images relative to the screen by using Graphics.drawImage. If you want to draw images relative to the level-scene then you can use Graphics.drawImageToScene.

[Hoeloe]

You can draw images relative to the screen by using Graphics.drawImage. If you want to draw images relative to the level-scene then you can use Graphics.drawImageToScene.

Would be nice to have something similar for text.

[SAJewers]

any updates on the ticking P-switch thingy?

[Kevsoft]

any updates on the ticking P-switch thingy?

Uhm, what do you need again from the P-Switch mechanism?

[Ignoritus]

If you want to draw images relative to the level-scene then you can use Graphics.drawImageToScene.

Does this force the draw call even if the destination isn't currently on-screen, or does it perform a check beforehand?

[Kevsoft]

If you want to draw images relative to the level-scene then you can use Graphics.drawImageToScene.

Does this force the draw call even if the destination isn't currently on-screen, or does it perform a check beforehand?

Direct draw, no on-screen check.

[SAJewers]

any updates on the ticking P-switch thingy?

Uhm, what do you need again from the P-Switch mechanism?

The request was to replace the P-switch jingles with a sound effect that played over the regular level music, like in ASMT:

EDIT: Also, Is it possible to have no P-Switch music, like in ASMT/A2MT?

I'm unaware of what was done in ASMT/A2MT for no P-Switch music (was it just have no music file or a silent music file?), but any reason the same can't be done?

I'm now however thinking that in the next few days I may look into adding a "p-switch settings" thing to LunaLua, so various things about p-switches could be set from Lua, which would be via the lunaworld.lua file for making something episode-wide. Might think about making it so in addition to silent or not, maybe allowing the duration to be changed by Lua code (not super relevant to A2XT stuff at the episode level but maybe some level creators would find it handy)

the P-switch thingy in ASMT was an ASM patch that replaced the P-switch music with a ticking sound effect that played over the level music. Here's an example from raocow's ASMT LP, or a TAS of that level if you don't want commentary. I can easily grab that sound effect.

[Rednaxela]

any updates on the ticking P-switch thingy?

Ahhh right. Sorry about that. Life has been a bit hectic recently and that item slipped off my radar for a bit.
Once I get time for it, it's probably a quick 1-evening type of task.

Any target date of when you want it for? I know things are in the level review stage right now right? I'll try to not let it slip off my radar in any case.

[SAJewers]

As soon as you can get it done, but don't rush. We'll probably need more levels, as almost half the levels have rejects to their name. If we can get some reviewers to review levels, I'm hoping to get the current submissions list pared down significantly by the end of the month. I expect we'll hit maybe 40 approved levels by then, and would need about 30 or 40 more. I don't expect to get a finalized level list before christmas, unless we get a big spree of submissions after MaGLX2.

[Karatekid5]

Graphics.placeSrpite does draw relative to the screen. try this code:

Code: Select all

local overlay = Graphics.loadImage("//HUB/Olimar.png");

function onLoop()
	if (player.x > -119306 and player.x < -119262 and player.y > -119974 and player.y <-119682) then
		Text.print("Olimaaaaaar",12,12)
		Graphics.placeSprite(1, overlay, 100, 100)
	end
end

I tried out your code, though it resulted in this error:

[SAJewers]

Graphics.placeSrpite does draw relative to the screen. try this code:

Code: Select all

local overlay = Graphics.loadImage("//HUB/Olimar.png");

function onLoop()
	if (player.x > -119306 and player.x < -119262 and player.y > -119974 and player.y <-119682) then
		Text.print("Olimaaaaaar",12,12)
		Graphics.placeSprite(1, overlay, 100, 100)
	end
end

I tried out your code, though it resulted in this error:

Try this:

Code: Select all

local overlay = Graphics.loadImage("Misc.resolveFile("Olimar.png"));

function onLoop()
	if (player.x > -119306 and player.x < -119262 and player.y > -119974 and player.y <-119682) then
		Text.print("Olimaaaaaar",12,12)
		Graphics.placeSprite(1, overlay, 100, 100)
	else
	Graphics.unplaceSprites(overlay)
	end
end

[Karatekid5]

Try this:

Code: Select all

local overlay = Graphics.loadImage("Misc.resolveFile("Olimar.png"));

function onLoop()
	if (player.x > -119306 and player.x < -119262 and player.y > -119974 and player.y <-119682) then
		Text.print("Olimaaaaaar",12,12)
		Graphics.placeSprite(1, overlay, 100, 100)
	else
	Graphics.unplaceSprites(overlay)
	end
end

Got a simpler error this time. Is there a problem with the parentheses?

[Ignoritus]

Try this:

Code: Select all

local overlay = Graphics.loadImage("Misc.resolveFile("Olimar.png"));

function onLoop()
	if (player.x > -119306 and player.x < -119262 and player.y > -119974 and player.y <-119682) then
		Text.print("Olimaaaaaar",12,12)
		Graphics.placeSprite(1, overlay, 100, 100)
	else
	Graphics.unplaceSprites(overlay)
	end
end

Got a simpler error this time. Is there a problem with the parentheses?

Quotations actually. You open a quotation before Misc which then turns everything proceeding into a string including your close-parantheses.

[Karatekid5]

I removed the quotation mark before the Misc, but now running the code makes SMBX crash with an exception code of 0xc0000005.

[Kevsoft]

Try with:

Code: Select all

local overlay = Graphics.loadImage(Misc.resolveFile("HUB/Olimar.png"));

function onLoop()
   if (player.x > -119306 and player.x < -119262 and player.y > -119974 and player.y <-119682) then
      Text.print("Olimaaaaaar",12,12)
      Graphics.placeSprite(1, overlay, 100, 100)
   end
end