Post your modding questions here

[addi]

addi, that's because the formspec is defined with a string. The api documentation helped me. Also looking at mods that alter the player formspec should give you the solution.

https://github.com/minetest/minetest/bl ... i.txt#L922

yes i know, but what is about this: http://dev.minetest.net/Lua_Table_Formspec
i thougt its new, but it seems not so. :-(

[drkwv]

Is it possible to get particle collision coordinates? What does playername parameter for minetest.add_particle is used for?

[durtective6]

Hello, I've been trying to make some tools in a mod I am making but I am having trouble making two of them. How would I make it so a pickaxe drops the smelted product of whatever it digs? Also how would I make it so when a ore is dug by a certain pickaxe it drops a different item (e.g. gold ore--> gold shards/pieces etc)? Thanks

[Casimir]

Is it possible to get particle collision coordinates?

No, But you can use entities instead. See PilzAdams throwing mod.

What does playername parameter for minetest.add_particle is used for?

Particles are only shown to that player.

[drkwv]

How do I capture mouse right click on nothing with node or craftitem?

[Krock]

How do I capture mouse right click on nothing with node or craftitem?

Items:

Code: Select all

    on_place = func(itemstack, placer, pointed_thing),
    ^ Shall place item and return the leftover itemstack
    ^ default: minetest.item_place

https://github.com/minetest/minetest/bl ... 2338-L2340

Nodes:

Code: Select all

    after_place_node = func(pos, placer, itemstack, pointed_thing),
    ^ Called after constructing node when node was placed using
      minetest.item_place_node / minetest.place_node
    ^ If return true no item is taken from itemstack
    ^ default: nil

https://github.com/minetest/minetest/bl ... 2436-L2440

[drkwv]

on_place, after_place_node

Both don't work when I click on nothing (on air).

[Krock]

on_place, after_place_node

Both don't work when I click on nothing (on air).

Well then, for nodes:

Code: Select all

    on_rightclick = func(pos, node, clicker, itemstack, pointed_thing),
    ^ default: nil
    ^ if defined, itemstack will hold clicker's wielded item
    ^ Shall return the leftover itemstack
    ^ Note: pointed_thing can be nil, if a mod calls this function

https://github.com/minetest/minetest/bl ... 2453-L2457

Haven't found anything about craftitems on_rightclick.

[Casimir]

Do you mean you want to create a node/item/tool that you hold in the hand and when pointing onto the sky and right click a function should be executed?
Then it would be something like this.

Code: Select all

on_place = function(itemstack, user, pointed_thing)
	if pointed_thing then return end
	print("Oh, see those clouds!")
end,

[drkwv]

on_rightclick

On_rightclick is used when I right clicking on the placed node by hand. Tested it too.

Do you mean you want to create a node/item/tool that you hold in the hand and when pointing onto the sky and right click a function should be executed?

Yes, this is correct. But on_place is triggered only when I right click not on air.

[Casimir]

Then I don't think it is possible, you probably have to use on_use.

Does anybody know why this returns "0" ? I'm calling it five seconds after the game started.
local number = table.maxn(minetest.registered_items)

[Krock]

local number = table.maxn(minetest.registered_items)

And

Code: Select all

local number = #minetest.registered_items

?

[Casimir]

Zero

This works:

Code: Select all

	local number = 0
	for name, item in pairs(minetest.registered_items) do
		number = number + 1
	end

[philipbenr]

Quick Question:
(probably been asked before, but I can't seem to find it)

When crafting an item, how can I get an item as an output and then have another item be put back into my inventory? I wish to craft milk in drinking glasses that uses a bucketful of milk from kpgmobs and vessels. I want the output to be 5 glasses of milk, and I also want to have the bucket be returned to a slot in my inventory. How to do so?

[Krock]

<snip>

Do you mean replacements?

Code: Select all

minetest.register_craft( {
	type = "shapeless",
        output = "homedecor:terracotta_base 8",
        recipe = {
		"default:dirt",
		"default:clay_lump",
		"bucket:bucket_water"
        },
	replacements = { {"bucket:bucket_water", "bucket:bucket_empty"}, },
})

Random from homedecor.
It will return you 8 terracotta base and an empty bucket.

[philipbenr]

I believe so. Thank you, Krock.

[lag01]

Hello,
i want to write lua code to punish players who hit another players at spawn.
How can i detect when that happens?

Or maybe there already is mod for that?

[Sokomine]

When crafting an item, how can I get an item as an output and then have another item be put back into my inventory? I wish to craft milk in drinking glasses that uses a bucketful of milk from kpgmobs and vessels.

There's a receipe (afaik in the food mod?) that uses two buckets of milk for one cheese - without returning any buckets. I'm not sure if two items may be returned simultaneously. Perhaps in such cases a special "machine" might be best. I didn't get around to give the barrels from my cottages mod any functionality yet.

[Topywo]

When crafting an item, how can I get an item as an output and then have another item be put back into my inventory? I wish to craft milk in drinking glasses that uses a bucketful of milk from kpgmobs and vessels.

There's a receipe (afaik in the food mod?) that uses two buckets of milk for one cheese - without returning any buckets. I'm not sure if two items may be returned simultaneously. Perhaps in such cases a special "machine" might be best. I didn't get around to give the barrels from my cottages mod any functionality yet.

replacements = { { "bucket:bucket_water", "bucket:bucket_empty"}, { "charcoal:charcoal", "default:torch 4"}}


This seems to work, giving you the standard output, an empty bucket and 4 torches (tested with charcoal mod). I thought I tried something similar a year ago without any luck, so maybe it's a new feature, idk.


Edit: The replacements are placed in the crafting grid. This means that as long as you can craft, the replacements are not placed in the crafting grid, because the crafting materials are in there. So not very suitable for 'mass' crafting production. It would have been nicer if the replacements would be placed directly in your inventory.

[leeminer]

I'm getting the hang of modding minetest now. I'm curious about the limits of the modding api. Can someone give me a rough idea of what is possible with the minetest api? What can and cannot be done.

[lag01]

I'm getting the hang of modding minetest now. I'm curious about the limits of the modding api. Can someone give me a rough idea of what is possible with the minetest api? What can and cannot be done.

For now, i noticed two wierd limitations:
you can use your function on chat message event, but cannot change or cancel message itself.
no api to call your code, when player is hit or killed by other player. workaround i used in my mod, was to use minetest.register_on_dieplayer + minetest.get_objects_inside_radius

You probably already had seen http://dev.minetest.net/Category:Methods, http://dev.minetest.net/Player etc. Also more insane way: http://dev.minetest.net/Global_tables

[leeminer]

Been banging my head for some time so here goes.

How can you access the player object in singleplayer and modify it? I am trying to modify the player object to decrease gravity or increase jump height but I get an error when I insert my code.

Code: Select all

player:set_physics_override({gravity=3.0})

I also tried

Code: Select all

user:set_physics_override({gravity=3.0})

I found info here, http://dev.minetest.net/Player, however once again I think I am missing something horribly simple and obvious. Any help would be appreciated. I want my character to jump a round like superman ;)

[lag01]

Been banging my head for some time so here goes.

How can you access the player object in singleplayer and modify it? I am trying to modify the player object to decrease gravity or increase jump height but I get an error when I insert my code.

Code: Select all

player:set_physics_override({gravity=3.0})

I also tried

Code: Select all

user:set_physics_override({gravity=3.0})

I found info here, http://dev.minetest.net/Player, however once again I think I am missing something horribly simple and obvious. Any help would be appreciated. I want my character to jump a round like superman ;)

If you want do this to all players in game, i believe you can do this just by minetest.conf

Else, you must call your code somewhere, where "player" is set, for example inside http://dev.minetest.net/minetest.register_on_joinplayer

[leeminer]

Getting closer to changing the speed, gravity and jump of the player. Sooo close...
Can someone tell me why this code doesn't work? It throws a lua init error when launching the world with my mod enabled.

Code: Select all

local player = minetest.get_player_by_name("singleplayer")
player:set_physics_override({gravity=3.0,jump=3.0,speed=3.0})

I also tried the example at this page with no luck...

http://dev.minetest.net/minetest.get_player_by_name

So close I can taste it!

[lag01]

Getting closer to changing the speed, gravity and jump of the player. Sooo close...
Can someone tell me why this code doesn't work? It throws a lua init error when launching the world with my mod enabled.

may-be you are calling your code at wrong place or in wrong time. for example right in mod body, while player "singleplayer" not exists yet.
try something like this:

Code: Select all

minetest.register_on_joinplayer(function(player)
	player:set_physics_override({gravity=3.0,jump=3.0,speed=3.0})
end)