Post your modding questions here

[Krock]

how to make a mod?

Complicated or easy way?

[Pitriss]

how to make a mod?

Complicated or easy way?

Complicated: learn lua, read http://dev.minetest.net/Intro, get an idea, write mod, profit

Easy way: learn lua, read http://dev.minetest.net/Intro, get an idea, write mod, profit

[Krock]

Complicated: learn lua, read http://dev.minetest.net/Intro, get an idea, write mod, profit

Easy way: learn lua, read http://dev.minetest.net/Intro, get an idea, write mod, profit

+1
Thought the same

[Topywo]

how to make a mod?

Actually there are 2 easy ways too:

- Copy and paste other mods. Then change them. Don't forget to give their makers credit.

- Read the decowood tutorial (scroll down after clicking the link):
http://dev.minetest.net/Intro

Also debug.txt is your best friend trying out mods you make.


Edit: This intro link is without a ","

[PilzAdam]

how to make a mod?

Complicated or easy way?

Complicated: learn lua, read http://dev.minetest.net/Intro, get an idea, write mod, profit

Easy way: learn lua, read http://dev.minetest.net/Intro, get an idea, write mod, profit

The complicated way is: learn lua, read https://github.com/minetest/minetest/bl ... ua_api.txt, get an idea, write mod, profit

[Ferdi Napoli]

Can someone put the download of the third person mod?
Sorry for the language,i'm italian

[Krock]

Can someone put the download of the third person mod?
Sorry for the language,i'm italian

It's not a mod.
viewtopic.php?id=5397

[prestidigitator]

That's not quite what I meant. I know how to do so, but I need to be able to set the facing position inside the callback after_place_node.

I believe you'll need to call minetest.set_node() to change the 'param2' attribute while preserving 'name' and 'param1'. You may also need to preserve the metadata if it is important using minetest.get_meta():to_table() and minetest.get_meta():from_table() before and after set_node(), respectively. I believe metadata is reset when the node is changed, but I can't remember for sure. You might want to test it.

[Nore]

That's not quite what I meant. I know how to do so, but I need to be able to set the facing position inside the callback after_place_node.

I believe you'll need to call minetest.set_node() to change the 'param2' attribute while preserving 'name' and 'param1'. You may also need to preserve the metadata if it is important using minetest.get_meta():to_table() and minetest.get_meta():from_table() before and after set_node(), respectively. I believe metadata is reset when the node is changed, but I can't remember for sure. You might want to test it.

No: use minetest.swap_node(pos, new_node), it preserves metadata

[philipbenr]

That's not quite what I meant. I know how to do so, but I need to be able to set the facing position inside the callback after_place_node.

I believe you'll need to call minetest.set_node() to change the 'param2' attribute while preserving 'name' and 'param1'. You may also need to preserve the metadata if it is important using minetest.get_meta():to_table() and minetest.get_meta():from_table() before and after set_node(), respectively. I believe metadata is reset when the node is changed, but I can't remember for sure. You might want to test it.

No: use minetest.swap_node(pos, new_node), it preserves metadata

Oh, Thank you so much. It will save me a lot of time.

[Krock]

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

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)

Code: Select all

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

Code: Select all

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

Maybe.

[Krock]

Code: Select all

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

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:

Code: Select all

local a ={1}
local b=a

now I want to change ONLY the table "b"

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:

Code: Select all

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:

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?

Code: Select all

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.:

Code: Select all

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?