Post your modding questions here

[kaeza]

I've got some code I'd like to execute whenever a certain type of node is added to the world, including when starting / playing / connecting to the game. Node definitions have lua functions for when hooking to events, for instance on_construct which seemed to most likely candidate, but that doesn't work. Is there some way to do this?

on_construct is only called when the node is placed. Unfortunately, what you require is not so easy (if even practical) to implement.

Edit: I assume you mean the code is run *only* once after connecting. Am I mistaken?

I wasn't very clear, sorry. Yeah, I want it to run once, but probably just when the game / server starts. I don't think I need it for all connecting / joining. I would've thought there'd be some kind of mapping / node creation process that occurred which I'd be able to link into...

Still, I gonna try and use register_on_joinplayer or register_on_newplayer and a find_nodes_in_area. I don't think it's the "right" answer, but it might work.

Oh, on that note, what is the difference between register_on_joinplayer and register_on_newplayer? The wiki isn't very clear about it.

on_join gets called every time a player joins. on_new is only called every time a *new* player joins your server (i.e. a player that never joined your server before).

[Dan Duncombe]

How do I make a node that plays a certain sound for a certain range upon receiving mesecon signal? Also, how do I change the range? The sound needs to loop as long as a current is being received.
EDIT: Also, with custom nodebox shapes, are the first 3 numbers the box shape, the second 3 the location of the box relative to the node centre?

[1244]

It is possible to write mod in c++?

[kaeza]

It is possible to write mod in c++?

A .dll or .so that can directly interface with the engine, nope.
Only way to "mod" in C/C++ is by writing patches for the engine.

[kaeza]

How do I make a node that plays a certain sound for a certain range upon receiving mesecon signal? Also, how do I change the range? The sound needs to loop as long as a current is being received.
EDIT: Also, with custom nodebox shapes, are the first 3 numbers the box shape, the second 3 the location of the box relative to the node centre?

the first three ones are one corner of the box, and the other three are the other corner.

All positions are relative to the *center* of the node, so -0.5 and 0.5 means the edge. Of course, you can use boxes bigger than a node, but the collision is buggy.

[Mossmanikin]

EDIT: Also, with custom nodebox shapes, are the first 3 numbers the box shape, the second 3 the location of the box relative to the node centre?

The dimensions of a standard node:

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Code: Select all

--              { left  , bottom , front  ,  right ,  top   ,  back  }

local cube =    {-0.5   , -0.5   , -0.5   ,  0.5   ,  0.5   ,  0.5   }

[Dan Duncombe]

So...The first 3 are one half of the block, the other three are the other half of the block?

[Mossmanikin]

So...The first 3 are one half of the block, the other three are the other half of the block?

Sort of, yes. But you still need 6 coordinates to draw a "half block". ;)

EDIT: Have you seen this post? VanessaE explains quite well how a nodebox works there.

[yohanes828]

i have edit blocks

[zoropig]

ok so im making a squid mod but everytime i try to start a minetest game i says that it faild. help plz

[zoropig]

how do i make it so that then there will be a boss health at the top of the screen?

[Thermal_Shock]

I have a couple of issues at the moment that are hampering me. Most likely entirely because of my limited experience with coding.

The first is that my modded blocks don't seem to work properly when adding them to the stairs mod from the Minetest game. The new node blocks were defined within the default folder in the nodes.lua file just like the Minetest game. These are my block definitions in the stairs mod.

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Code: Select all

--
--This one works fine. The Limestone block uses the default stone ID.
--
stairs.register_stair_and_slab("Limestone", "default:stone",
        {cracky=3},
        {"hg_gls.png"},
        "Limestone Stair",
        "Limestone Slab",
        default.node_sound_stone_defaults())

--
--This one and any other new blocks won't work.
--

stairs.register_stair_and_slab("Red Sandstone", "default:red_sandstone",
        {cracky=3},
        {"hg_rss.png"},
        "Red Sandstone Stair",
        "Red Sandstone Slab",
        default.node_sound_stone_defaults())


My second question is, how do I go about adding a new furnace block that only accepts certain blocks for fuel?

[PilzAdam]

I have a couple of issues at the moment that are hampering me. Most likely entirely because of my limited experience with coding.

The first is that my modded blocks don't seem to work properly when adding them to the stairs mod from the Minetest game. The new node blocks were defined within the default folder in the nodes.lua file just like the Minetest game. These are my block definitions in the stairs mod.

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

--
--This one works fine. The Limestone block uses the default stone ID.
--
stairs.register_stair_and_slab("Limestone", "default:stone",
        {cracky=3},
        {"hg_gls.png"},
        "Limestone Stair",
        "Limestone Slab",
        default.node_sound_stone_defaults())

--
--This one and any other new blocks won't work.
--

stairs.register_stair_and_slab("Red Sandstone", "default:red_sandstone",
        {cracky=3},
        {"hg_rss.png"},
        "Red Sandstone Stair",
        "Red Sandstone Slab",
        default.node_sound_stone_defaults())


There is no node called "default:red_sandstoe" in the default mod, so the recipes wont work.

[Thermal_Shock]

There is no node called "default:red_sandstoe" in the default mod, so the recipes wont work.

Oh. You misunderstand. My new node's are added to the node.lua file.

Edit:

Well this is interesting. It seems removing the space in "Red Sandstone" to "RedSandstone" fixed the issue and now it works as intended.

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

stairs.register_stair_and_slab("RedSandstone", "default:red_sandstone",
        {cracky=3},
        {"hg_rss.png"},
        "Red Sandstone Stair",
        "Red Sandstone Slab",
        default.node_sound_stone_defaults())

What exactly is that first part for then?

[ch98]

My concrete 2.2 mod seems to shut server down when you dig the concrete.
Code causing the problem most likely is...

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Code: Select all

minetest.register_node("concrete:concrete", {
    description = "Concrete",
    tiles = {"concrete_concrete.png"},
    is_ground_content = true,
    groups = {cracky=1},
    drop = "concrete:gravel_mound",
    after_destruct = function(pos)
        minetest.env:set_node(pos, "concrete:concrete4")
    end,
})

minetest.register_node("concrete:concrete1", {
    tiles = {"concrete_concrete.png"},
    is_ground_content = true,
    groups = {cracky=1},
    drop = "concrete:gravel_mound",
    after_destruct = function(pos)
        minetest.env:set_node(pos, "concrete:concrete2")
    end,
})

minetest.register_node("concrete:concrete2", {
    tiles = {"concrete_concrete.png"},
    is_ground_content = true,
    groups = {cracky=1},
    drop = "concrete:gravel_mound",
    after_destruct = function(pos)
        minetest.env:set_node(pos, "concrete:concrete3")
    end,
})

minetest.register_node("concrete:concrete3", {
    tiles = {"concrete_concrete.png"},
    is_ground_content = true,
    groups = {cracky=1},
    drop = "concrete:gravel_mound",
    after_destruct = function(pos)
        minetest.env:set_node(pos, "concrete:concrete")
    end,
})

minetest.register_node("concrete:concrete4", {
    tiles = {"concrete_concrete.png"},
    is_ground_content = true,
    groups = {cracky=1},
    drop = "concrete:gravel_mound",
    after_destruct = function(pos)
        minetest.env:set_node(pos, "concrete:concrete5")
    end,
})

minetest.register_node("concrete:concrete5", {
    tiles = {"concrete_concrete.png"},
    is_ground_content = true,
    groups = {cracky=1},
    drop = "concrete:gravel_mound",
    after_destruct = function(pos)
        minetest.env:set_node(pos, "concrete:concrete6")
    end,
})

minetest.register_node("concrete:concrete6", {
    tiles = {"concrete_concrete.png"},
    is_ground_content = true,
    groups = {cracky=1},
    drop = "concrete:gravel_mound",
})

minetest.register_node("concrete:reinforced_concrete", {
    description = "Reinforced Concerte",
    tiles = {"concrete_concrete.png"},
    is_ground_content = true,
    groups = {cracky=1},
    drop = "concrete:gravel_mound",
    after_destruct = function(pos)
        minetest.env:set_node(pos, "concrete:concrete1")
    end,
})


can you find the problem?

[Evergreen]

How do I go about creating "groups" of nodes? Like wood, stone, wool, etc.

[1244]

Is possible to load chunk in given position?

[Nore]

I saw in IRC that it was possible with VoxelManipulator... However, I have no idea how to do it.

[PilzAdam]

Is possible to load chunk in given position?

Just call read() of a VocelManipulator in the block.

[Evergreen]

How would I go about detecting whether fancy trees are enabled or not? (fyi, it doesn't have to be entirely in lua)

[kaeza]

How would I go about detecting whether fancy trees are enabled or not? (fyi, it doesn't have to be entirely in lua)

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Code: Select all

if minetest.setting_getbool("new_style_leaves") then
  -- Do something here
end


[PilzAdam]

How would I go about detecting whether fancy trees are enabled or not? (fyi, it doesn't have to be entirely in lua)

The drawtype "allfaces_optional" is only drawn as "allfaces" if fancy leaves are enabled, otherwise its drawn as a solid node.

[Evergreen]

How would I go about detecting whether fancy trees are enabled or not? (fyi, it doesn't have to be entirely in lua)

The drawtype "allfaces_optional" is only drawn as "allfaces" if fancy leaves are enabled, otherwise its drawn as a solid node.

How would I detect that though? I'm planning on making different textures for when fancy trees are turned off.

[PilzAdam]

How would I go about detecting whether fancy trees are enabled or not? (fyi, it doesn't have to be entirely in lua)

The drawtype "allfaces_optional" is only drawn as "allfaces" if fancy leaves are enabled, otherwise its drawn as a solid node.

How would I detect that though? I'm planning on making different textures for when fancy trees are turned off.

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

if minetest.setting_getbool("new_style_leaves") then
  -- Do something here
end


[Evergreen]

Ah, I was looking at the minetest.conf, and changed fancy trees on and off, but nothing seemed to change in the conf file. I actually knew the code for getting a setting from the conf file, I was just confused that the new_style_leaves setting wasn't changing. Thanks though. :P

[6r1d]

How do I delete nodes around moving object? For example, I want to program this object to remove coalblocks and cobblestones I've dropped.
I'm using "on_step" function.

[fairiestoy]

Hey guys.

Im playing minetest a few weeks now and was interested in learning a bit Lua and the minetest Lua API. But the starts also shows me an End for which i have a question for. Maybe im wrong, but for what i've read up to now, all Lua code is executed on server-side and the results are send to the connected client. I only wanted to make a little HUD element that only needs the local data of the client. Is it somehow possible that i am wrong and mods that only take local used data are also executed only local?

As explanation:
I want to make some kind of compass which shows up as a image in the HUD. It has to turn around according to the current YAW value of the user. The only data that is needed from the server once, is the position of possible 'important points' which will be shown as colored dots on the compass with the fitting direction of that destination. I came up with this idea since i saw very much especially new players who are not able of finding specific spots in the world. They just start running and end up in the big nowhere.
Im aware of the fact that i need more data from the server for the user location, but how should i refresh the compass without to heavy load on the server with globalstep?

Any help would be nice.

Greetings ... fairiestoy

[Casimir]

[fullqoute]

This might help:

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Code: Select all

    local objects = minetest.env:get_objects_inside_radius(pos, 0.5)
    for _, v in ipairs(objects) do
        if v:get_entity_name() == "gemalde:"..number.."" then
            v:remove()
        end
    end


[PilzAdam]

Hey guys.

Im playing minetest a few weeks now and was interested in learning a bit Lua and the minetest Lua API. But the starts also shows me an End for which i have a question for. Maybe im wrong, but for what i've read up to now, all Lua code is executed on server-side and the results are send to the connected client. I only wanted to make a little HUD element that only needs the local data of the client. Is it somehow possible that i am wrong and mods that only take local used data are also executed only local?

As explanation:
I want to make some kind of compass which shows up as a image in the HUD. It has to turn around according to the current YAW value of the user. The only data that is needed from the server once, is the position of possible 'important points' which will be shown as colored dots on the compass with the fitting direction of that destination. I came up with this idea since i saw very much especially new players who are not able of finding specific spots in the world. They just start running and end up in the big nowhere.
Im aware of the fact that i need more data from the server for the user location, but how should i refresh the compass without to heavy load on the server with globalstep?

Any help would be nice.

Greetings ... fairiestoy

Lua code always runs on the server, no chance to get it in the client.

[Chinchow]

I have a question about overlaying textures.
I'm aware you can overlay one texture with another such as stone and iron but is it possible to layer another animated texture over both of the previous ones I'm aware I could test this myself but I am away from my computer for a few weeks and I am programming on my phone.