Post your modding questions here

[Desour]

@BrunoMine: #players doesn't work with such tables. Count the players in the for thing.

[ABJ]

How do I create something that runs as long as a block exists but disappears when it is dug? EG: smoke for fire.

[BrunoMine]

I am not able to use the dsdsds method. minetest.rollback_get_node_actions.

Code: Select all

minetest.register_on_dignode(function(pos, oldnode, digger)
	local rollback = minetest.rollback_get_node_actions(
		pos, -- pos
		10, -- range
		5, -- seconds
		5 -- limit
	) or {}
	
	minetest.chat_send_all(table.maxn(rollback).." actions")
end)

Results:

Code: Select all

0 actions
0 actions
0 actions
...

What is wrong?

EDIT:
I forgot to enable it in minetest.conf
SOLVED!

[BrunoMine]

How do I create something that runs as long as a block exists but disappears when it is dug? EG: smoke for fire.

Have you tried an ABM?
This allows you to execute a function repeatedly while a node is active.

[Desour]

How do I create something that runs as long as a block exists but disappears when it is dug? EG: smoke for fire.

Have you tried an ABM?
This allows you to execute a function repeatedly while a node is active.

An abm wouldn't make much sense here.
on_construct: Add a particlespawner in a variable (bla = minetest.add_particlespawner(particlespawner definition)) and store this variable somewhere, like in metadata.
on_destruct: Get this variable and remove the particlespawner again.
api:
particlespawner
on_construct and destruct

[burli]

The documentation says, that get_node_timer accepts fractional values. But this code doesn't work. I only get full seconds

Code: Select all

minetest.get_node_timer(leaves_near[i]):start(math.random() * 10.0)

What's wrong? The documentation, the function or I?

[orwell]

The documentation, I think. Mesecons pressure plates also only work at an 1s interval.

[orwell]

How do I create something that runs as long as a block exists but disappears when it is dug? EG: smoke for fire.

Have you tried an ABM?
This allows you to execute a function repeatedly while a node is active.

An abm wouldn't make much sense here.
on_construct: Add a particlespawner in a variable (bla = minetest.add_particlespawner(particlespawner definition)) and store this variable somewhere, like in metadata.
on_destruct: Get this variable and remove the particlespawner again.
api:
particlespawner
on_construct and destruct

Particle spawners get removed when the block is unloaded I think. Use LBM to spawn it again.

[rubenwardy]

The documentation says, that get_node_timer accepts fractional values. But this code doesn't work. I only get full seconds

Code: Select all

minetest.get_node_timer(leaves_near[i]):start(math.random() * 10.0)

What's wrong? The documentation, the function or I?

There's a setting which makes this run faster. By default it only runs once a second

[burli]

Ah, ok. Thanks

[GreenXenith]

How do I make items spawn in a certain area?
Explain:
I have block A and block B.
bA and bB form opposite corners of a cubic area.
I want a certain item to spawn anywhere in that area at a certain rate (appear and fall to the floor).
How do I do this (needs to be according to bA and BB so the area can be however I want)?

[ABJ]

How do I make something that gets created with a block and deleted with it?

[GreenXenith]

Another question: Is it possible to use items as buttons in a custom chest?
Explain:
Have a chest with 2 items.
Click/select an item and it takes you to another "page" in the chest.
In that "page", have a "back" item so when pressed takes you back to main "page".

[orwell]

You can add image buttons that look like the item. (item_image_button[])

[Hybrid Dog]

ABJ, you can use the on_place, on_construct etc. in the node definition.

[ozkur]

Sorry that this is the derpiest of all derpy and stupid questions:

How do I upload a mod to the forums?

[Hybrid Dog]

ozkur, there are lots of ways to upload a mod, e.g. here's the init.lua of my version of the drippingwater mod as png:

(it's grey because ascii)

[BrunoMine]

Hello guys.
I'm having trouble for detect objects in an area. I have used the minetest.get_objects_inside_radius method, but it does not work correctly. Sometimes it does not work, usually when I'm at a disancia of approximately 20 blocks.
Is there any more consistent way to perform this verification?

[ozkur]

ozkur, there are lots of ways to upload a mod, e.g. here's the init.lua of my version of the drippingwater mod as png:

(it's grey because ascii)

Thanks for trying, but I still am confused.
Are you saying I do something like turn the entire folder into a .png file?

[kaeza]

Sorry that this is the derpiest of all derpy and stupid questions:

How do I upload a mod to the forums?

Use an archiving program(*) to compress your folder in a ZIP file, create a new topic for it in the WIP Mods subforum(**), and upload the ZIP file as an attachment ("Upload attachment" tab under the posting text box).

(*) Windows comes with support to compress folders, or you can use an external program like 7-zip.
(**) See also the guidelines for mod releases.

[ozkur]

Sorry that this is the derpiest of all derpy and stupid questions:

How do I upload a mod to the forums?

Use an archiving program(*) to compress your folder in a ZIP file, create a new topic for it in the WIP Mods subforum(**), and upload the ZIP file as an attachment ("Upload attachment" tab under the posting text box).

(*) Windows comes with support to compress folders, or you can use an external program like 7-zip.
(**) See also the guidelines for mod releases.

Thanks!

[Hybrid Dog]

BrunoMine, you can only get active objects. Maybe you need to forceload some chunks.

[orwell]

BrunoMine, you can only get active objects. Maybe you need to forceload some chunks.

Are you scanning for objects that your mod defines? Then let them save their last active position in a table and just search this yourself. Then just forceload that area(*)
#screwminetestsbuggyobjectmanagementsystem
To work consistently, that table has to be saved on shutdown.

(*) use that forceload anchors library, it handles forceloads better than minetest's internal.

[burli]

How can I place a locked chest and a key to unlock to a map from a script?

[GreenXenith]

I seem to be having trouble with registering 2 'on_punch' to the same node.

Code: Select all

on_punch = function(pos, node, player, pointed_thing)
		local inv = player:get_inventory()
		inv:add_item("main", "modname:node")
on_punch = function(pos, node, puncher, pointed_thing)
		minetest.set_node(pos, {name = "modename:othernode", param2 = node.param2})
	end
	end

This is only one example of what I have tried. In this particular case, only the first function happens. Other times it was just the latter. I want both to happen. How do I do this?