Post your modding questions here

[Krock]

How can I make this working? (example node names)

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Code: Select all

minetest.register_craft({
    type = 'cooking',
    recipe = "default:leaves 6",
    output = "default:coal_lump",
})

[Topywo]

How can I make this working? (example node names)

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Code: Select all

minetest.register_craft({
    type = 'cooking',
    recipe = "default:leaves 6",
    output = "default:coal_lump",
})

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Code: Select all

minetest.register_craft({
    type = 'cooking',
    output = "default:coal_lump",
    recipe = "default:leaves 6",
})

Maybe.

[Krock]

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minetest.register_craft({
    type = 'cooking',
    recipe = "default:leaves",
    output = "default:coal_lump 1/6",
})

I don't think it would work.

It works, just not the correct way. Still loosing 1 and getting 1.

Is there another way to make this working?

[LionsDen]

Maybe you could create a craft item that you would then need to craft into a coal_lump and would require 6 of them to do so. You would use the crafting grid to do so and maybe call them coal chunks or something.

I don't know for sure, but I think the furnace is only capable of turning one singular item into one other item.

[Gambit]

How would I go about making the stiff physics for webs. I want the player to be able to move slowly while touching it?

[ch98]

Is there any way to read pixels of png file in rgb using lua? I want to try to make image to map mod that uses images to make elevation and water.

[kaeza]

Is there any way to read pixels of png file in rgb using lua? I want to try to make image to map mod that uses images to make elevation and water.

You could use libpng via FFI (LuaJit), or a wrapper library.

[LionsDen]

The Image Loader mod

https://forum.minetest.net/viewtopic.php?id=6751

loads bitmap images into the game. You could look at that and see what it does and then you just need to find some lua code that allows you to read in a png file. Once you can read it and understand how to get at the pixel information it shouldn't be too hard to convert it to height maps and such. Hope this helps you out.

[ch98]

ok. i will try that.

[pandaro]

Question about lua tables:

I want to create a table that is a copy of another table.
Example:

local a ={1}
local b=a

now I want to change ONLY the table "b"

b[1]=b[1]+1

but:

print(dump(a))
print(dump(b))

returns

a={[1] = 2}
b={[1] = 2}

the problem is that if I change the table "b" then you also change the table "a". I want the table "a" remains unchanged. how?


sorry for the stupidity

[prestidigitator]

Question about lua tables:

I want to create a table that is a copy of another table.
Example:

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Code: Select all

local a ={1}
local b=a

now I want to change ONLY the table "b"

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Code: Select all

b[1]=b[1]+1

All variables refer to tables in Lua by reference, not by value. Lua's standard API also does not have any simple way to copy/clone tables. To implement a cloning method, you have to decide whether you want to also copy a table/object's metatable (sort of like a "class" in Lua). Also, since Lua tables can contain references to other tables, you have to decide whether you want to perform a shallow or a deep copy (a whole separate and independent tree of table objects).

Assuming all you want is a shallow copy, resulting in a simple table (with no metatable set) that simply has all the same keys and values as the original, try:

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function shallow_copy_table(t)
   local new_table = {};
   for k, v in pairs(t) do
      new_table[k] = v;
   end
   return new_table;
end


Your code would then have to look like:

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Code: Select all

local a = { 1 };
local b = shallow_copy_table(a);
b[1] = b[1]+1;


[pandaro]

All variables refer to tables in Lua by reference, not by value. Lua's standard API also does not have any simple way to copy/clone tables. To implement a cloning method, you have to decide whether you want to also copy a table/object's metatable (sort of like a "class" in Lua). Also, since Lua tables can contain references to other tables, you have to decide whether you want to perform a shallow or a deep copy (a whole separate and independent tree of table objects

Thank you very much, I was not aware of this behavior. Although it is logical thinking.

[Krock]

How can I override an ABM of the game?
I try to allow burning stacks into another stack, like burning 2 tree trunks and getting 1 coal lump.
Help!

EDIT: this, because I won't add a new node, instead override the old furnace function..

[Casimir]

I tried to draw a drowning bar in the hud just like the one that is done engine side. The problem is, the hud resizes in steps relative to the window size. The bar then appears in the wrong position when resizing the window. How can I get the hight in Lua? Is there a way to surpass the problem?

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player_bubbles[name] = player:hud_add({
    hud_elem_type = "statbar",
    text = "bubble.png",
    number = 20,
    dir = 0,
    position = {x=0.5,y=1.0},
    offset = {x=0, y=-58},
})


How can I override an ABM of the game?

I don't know a way you could. It would be possible when the ABM would call a function. e.g.:

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mod = {}

function mod.abm(pos, node)
        -- actual function
end

minetest.register_abm({
    nodenames = {"mod:node"},
    interval =5,
    chance = 5,
    action = function(pos, node)
                mod.abm(pos, node)
    end
})


That would require the default game to be changed. But I think it is better to do so anyway.

[Enke]

What is a soft dependancy, and how do I make one?

[PilzAdam]

What is a soft dependancy, and how do I make one?

https://github.com/minetest/minetest/blob/master/doc/lua_api.txt#L122
The optional dependencies are loaded first, if they are present.

[Enke]

What is a soft dependancy, and how do I make one?

https://github.com/minetest/minetest/blob/master/doc/lua_api.txt#L122
The optional dependencies are loaded first, if they are present.

Alright. Thank you.

[pandaro]

A question about sound.

I took the sounds for my mod "nodevil" by freesound.org.
This is legal? What should I write in readme.md, to make it known that the sounds are not mine and others that created them?

[kaeza]

A question about sound.

I took the sounds for my mod "nodevil" by freesound.org.
This is legal? What should I write in readme.md, to make it known that the sounds are not mine and others that created them?

Each sound on freesound.org carries a different license. Check the license of the individual sounds to see what you are and aren't allowed to do. The Creative Commons site has explanation for them in layman terms, and I believe freesound has links to relevant pages.

[Enke]

Is it possible to put a modpack in a modpack? Like mesecons?

[FNC]

Hi, my name is FNC!

I nead help with seting up mods for my single player world. I have technic and all that stuff that goes with it. BUT when I go to play it says like error with this long address to my technic mod folder. PLZ help!!

[Evergreen]

Hi, my name is FNC!

I nead help with seting up mods for my single player world. I have technic and all that stuff that goes with it. BUT when I go to play it says like error with this long address to my technic mod folder. PLZ help!!

Don't just say "it says like error with this long address to my technic folder" Copy and paste it from the file "debug.txt"

[Enke]

Is it possible to put a modpack in a modpack? Like mesecons?

I tried it out some time ago. It only works if the modpack and the mod don't have the same name if they are in a modpack.
So mods/smodpack/worldedit/worldedit doesn't work

I'm confused as to what you mean. Should I rename the modpack?

[prestidigitator]

Is it possible to put a modpack in a modpack? Like mesecons?

I'm not sure why you'd really need or want to, when merging modpacks is so easy. There are two requirements for a modpack:

1. The existence of an empty file called "modpack.txt" in the top level directory.
2. Subdirectories each named with the correct name of a mod, containing the code and other resources of that mod.

So to merge two modpacks, just put all the contents from both of them into one directory (and don't worry which modpack.txt file you grab).

[wtfsamcrap]

ok so i wanna make a coal block or a netherrack so it stays burning long and not going out heres my code
o btw they both have the same codeing works

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minetest.register_node("coalblock:block", { --Node
    description = "coalblock", --Inv name
    tiles = {"coal_block.png"}, --image
    stack_max = 64, --64 max stack cuz i am makeing it for pillsadam's minitest
    groups = {choppy=1,flammable=100}, --what the groups are
    sounds = default.node_sound_wood_defaults(),  --just wood
})


minetest.register_craft({
    output = 'coalblock:block', --my crafting for coalblock (still working on it just a sample)
    recipe = {
        {'group:wood', 'group:wood'},
        {'group:wood', 'group:wood'},
    }
})


[Krock]

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groups = {choppy=1,flammable=>>>1<<<},

minetest.register_craft({
    output = 'coalblock:block', --my crafting for coalblock (still working on it just a sample)
    recipe = {
        {'group:wood', 'group:wood'},
        {'group:wood', 'group:wood'},
    }
})


Try to use " instead of '

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minetest.register_craft({
        type = "fuel",
        recipe = "coalblock:block",
        burntime = 100,
})

[pandaro]

what effect does exactly: "max_drop_level" in the definition of a tool?

[PilzAdam]

what effect does exactly: "max_drop_level" in the definition of a tool?

Nothing, its up to mods to read it and give it any use. (Dunno why its mentioned in lua_api.txt, though)

[Krock]

And for what is

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is_ground_content = true,
legacy_facedir_simple = true,

in a node definition needed?

Also this makes me thinking:

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minetest.register_ore({
    ore_type       = "scatter",
})

Could someone explain me the use of them please?

[PilzAdam]

And for what is

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is_ground_content = true,
legacy_facedir_simple = true,

in a node definition needed?

Also this makes me thinking:

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Code: Select all

minetest.register_ore({
    ore_type       = "scatter",
})

Could someone explain me the use of them please?

is_ground_content tells whether the cavegen should cut through the node or not.
legacy_facedir_simple is for converting old maps, probably only useful for minetest_game.
What do you mean by "them" in the last sentence? The oregen types?