Post your modding questions here

[kaeza]

How do I overwrite a node like trees:tree_conifer from Tiny Trees?

I want to do this in my mod Alternative Trunks.

Here's an example of something I tried:

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Code: Select all

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

local cylinder = {
                {-0.1875,  -0.5   ,  -0.5   ,  0.1875,  0.5   ,  0.5   },
                {-0.5   ,  -0.5   ,  -0.1875,  0.5   ,  0.5   ,  0.1875},   
                {-0.3125,  -0.5   ,  -0.4375,  0.3125,  0.5   ,  0.4375},
                {-0.4375,  -0.5   ,  -0.3125,  0.4375,  0.5   ,  0.3125},   
                {-0.375 ,  -0.5   ,  -0.375 ,  0.375 ,  0.5   ,  0.375 },
}

if minetest.get_modpath("trees") ~= nil then
minetest.register_node(":trees:tree_conifer", {
    description = "Conifer trunk",
    paramtype = "light",
    tiles = {
        "trees_tree_top_conifer.png",
        "trees_tree_top_conifer.png",
        "trees_tree_conifer.png"},
    drawtype = "nodebox",
    selection_box = {
        type = "fixed",
        fixed = cube,
    },
    node_box = {
        type = "fixed",
        fixed = cylinder,
    },
    groups = {tree=1,choppy=2,oddly_breakable_by_hand=1,flammable=2},
    sounds = default.node_sound_wood_defaults(),
})
end

This doesn't work.
What did I do wrong?

Your code has nothing wrong. What I assume here is that the 'trees' mod is loaded after 'alttrunks', thus overwriting your definition.

You could fix that by putting 'trees' in optdepends.txt, or 'trees?' in depends.txt (requires git version of server though).

Edit: typo

[Topywo]

How do you make textures work on nodes that have nodeboxes bigger than a node? The only example I could find is the hydro turbine in mesecons, and I don't see anything special in the code.

Think of the nodebox-node as the central node with 6 borders; at a distance of 0.5 ({-0.5, -0.5, -0.5, 0.5, 0.5, 0.5}).

Imagine that your (central)nodebox-node is surrounded by nodes/cubes with the same proportions ({-0.5, -0.5, -0.5, 0.5, 0.5, 0.5}).

For a bigger texture you'll need to cross a border of your central nodebox.

Jeija wanted to build 'higher/on top' of the central nodebox. So with the vertical coordinates he 'crossed' the top (+ 0.5) border of his cental nodebox:

Hydroturbine:

type = "fixed",
fixed = {{-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
{-0.15, 0.5, -0.15, 0.15, 1.45, 0.15},
{-0.45, 1.15, -0.1, 0.45, 1.45, 0.1},
{-0.1, 1.15, -0.45, 0.1, 1.45, 0.45}},
},

To be precise, he crossed also the second border of 1.0 and draws also a texture in the second 'box' on top of the central nodebox.

[Mossmanikin]

How do I overwrite a node like trees:tree_conifer from Tiny Trees?

I want to do this in my mod Alternative Trunks.

Here's an example of something I tried:

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Code: Select all

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

local cylinder = {
                {-0.1875,  -0.5   ,  -0.5   ,  0.1875,  0.5   ,  0.5   },
                {-0.5   ,  -0.5   ,  -0.1875,  0.5   ,  0.5   ,  0.1875},   
                {-0.3125,  -0.5   ,  -0.4375,  0.3125,  0.5   ,  0.4375},
                {-0.4375,  -0.5   ,  -0.3125,  0.4375,  0.5   ,  0.3125},   
                {-0.375 ,  -0.5   ,  -0.375 ,  0.375 ,  0.5   ,  0.375 },
}

if minetest.get_modpath("trees") ~= nil then
minetest.register_node(":trees:tree_conifer", {
    description = "Conifer trunk",
    paramtype = "light",
    tiles = {
        "trees_tree_top_conifer.png",
        "trees_tree_top_conifer.png",
        "trees_tree_conifer.png"},
    drawtype = "nodebox",
    selection_box = {
        type = "fixed",
        fixed = cube,
    },
    node_box = {
        type = "fixed",
        fixed = cylinder,
    },
    groups = {tree=1,choppy=2,oddly_breakable_by_hand=1,flammable=2},
    sounds = default.node_sound_wood_defaults(),
})
end

This doesn't work.
What did I do wrong?

Your code has nothing wrong. What I assume here is that the 'trees' mod is loaded after 'alttrunks', thus overwriting your definition.

You could fix that by putting 'trees' in optdepends.txt, or 'trees?' in depends.txt (requires git version of server though).

Edit: typo

Thank you sooo much!
Now it works. :)

[SilverFlame]

i changed my version of minetest and still cannot install mods...i have 0.4.6 now and am having a lot of difficulty getting them to work. i keep getting an error message. i have microsoft windows 7 ultimate edition service pack one <build 7601> from what the black minetest window says. i am lost. is there a very detailed guide somewhere?

[PilzAdam]

i changed my version of minetest and still cannot install mods...i have 0.4.6 now and am having a lot of difficulty getting them to work. i keep getting an error message. i have microsoft windows 7 ultimate edition service pack one <build 7601> from what the black minetest window says. i am lost. is there a very detailed guide somewhere?

http://c55.me/minetest2/wiki/doku.php?id=installing_mods
Have you looked at this?

[Evergreen]

I have been making a trash can mod, and I have gotten the formspecs to look the way I want them to. My question is, how do I get the items to be deleted when the button "Clear Trash" is clicked. Code:

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Code: Select all

minetest.register_node("trash_can:trash_can_empty",{
    groups = {choppy=2},
    tiles = {"default_wood.png"},
    drawtype="nodebox",
    paramtype = "light",
    node_box = {
        type = "fixed",
        fixed = {
            {-0.375000,-0.500000,0.312500,0.375000,0.500000,0.375000},
            {0.312500,-0.500000,-0.375000,0.375000,0.500000,0.375000},
            {-0.375000,-0.500000,-0.375000,0.375000,0.500000,-0.312500},
            {-0.375000,-0.500000,-0.375000,-0.312500,0.500000,0.375000},
            {-0.312500,-0.500000,-0.312500,0.312500,-0.437500,0.312500},
        }
    },
    on_construct = function(pos)
        local meta = minetest.env:get_meta(pos)
        meta:set_string("formspec",
                "size[8,9]"..
                "button[0,0;2,1;name;Empty Trash]"..
                "list[current_name;main;3,1;2,3;]"..
                "list[current_player;main;0,5;8,4;]")
        meta:set_string("infotext", "Trash Can")
        local inv = meta:get_inventory()
        inv:set_size("main", 8*4)
    end,
    can_dig = function(pos,player)
        local meta = minetest.env:get_meta(pos);
        local inv = meta:get_inventory()
        return inv:is_empty("main")
    end,
    on_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
        minetest.log("action", player:get_player_name()..
                " moves stuff in trash can at "..minetest.pos_to_string(pos))
    end,
    on_metadata_inventory_put = function(pos, listname, index, stack, player)
        minetest.log("action", player:get_player_name()..
                " moves stuff to trash can at "..minetest.pos_to_string(pos))
    end,
    on_metadata_inventory_take = function(pos, listname, index, stack, player)
        minetest.log("action", player:get_player_name()..
                " takes stuff from trash can at "..minetest.pos_to_string(pos))
    end,
})


[kaeza]

I have been making a trash can mod, and I have gotten the formspecs to look the way I want them to. My question is, how do I get the items to be deleted when the button "Clear Trash" is clicked. Code:

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Code: Select all

-snip-


You need to use on_receive_fields.

Give a meaningful name to the 'empty trash' button:

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Code: Select all

(...)
"button[0,0;2,1;empty;Empty Trash]"..
(...)


then check it in on_receive_fields:

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Code: Select all

on_receive_fields = function(pos, formname, fields, sender)
  if fields.empty then
    -- code to clear inv here
  end
end,


[Evergreen]

I have been making a trash can mod, and I have gotten the formspecs to look the way I want them to. My question is, how do I get the items to be deleted when the button "Clear Trash" is clicked. Code:

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

-snip-


You need to use on_receive_fields.

Give a meaningful name to the 'empty trash' button:

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

(...)
"button[0,0;2,1;empty;Empty Trash]"..
(...)


then check it in on_receive_fields:

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Code: Select all

on_receive_fields = function(pos, formname, fields, sender)
  if fields.empty then
    -- code to clear inv here
  end
end,


I'm guessing one way of clearing the items is deleting the metadeta. However, I don't know how to do that.

[Evergreen]

Also something else that I want to do is make the trash can switch to a nodebox that makes the trash can look full. I tried this but it didn't work. (I'm pretty sure this isn't very good syntax, but I don't know that much about using the lua api) Code: (this is just the part I need help with)

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Code: Select all

if is_empty = function("trash") == "true" then
        node_box = {
        type = "fixed",
        fixed = {
            {-0.375000,-0.500000,0.312500,0.375000,0.500000,0.375000},
            {0.312500,-0.500000,-0.375000,0.375000,0.500000,0.375000},
            {-0.375000,-0.500000,-0.375000,0.375000,0.500000,-0.312500},
            {-0.375000,-0.500000,-0.375000,-0.312500,0.500000,0.375000},
            {-0.312500,-0.500000,-0.312500,0.312500,-0.437500,0.312500},
        }
    },
elseif is_empty = function ("trash") == "" then
        node_box = {
        type = "fixed",
        fixed = {
            {-0.375000,-0.500000,0.312500,0.375000,0.500000,0.375000}, --NodeBox 1
            {0.312500,-0.500000,-0.375000,0.375000,0.500000,0.375000}, --NodeBox 2
            {-0.375000,-0.500000,-0.375000,0.375000,0.500000,-0.312500}, --NodeBox 3
            {-0.375000,-0.500000,-0.375000,-0.312500,0.500000,0.375000}, --NodeBox 4
            {-0.312500,-0.500000,-0.312500,0.312500,0.375000,0.312500}, --NodeBox 5
        }
    }
end,


(also, trash is the name of the formspec/list I want to check for being full or not)

[Casimir]

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Code: Select all

if is_empty = function("trash") == "true" then

What are you trying to do here? With "a = b" you define that a is b, with "b == c" you ask if b is c.

[Evergreen]

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 is_empty = function("trash") == "true" then

What are you trying to do here? With "a = b" you define that a is b, with "b == c" you ask if b is c.

What I'm trying to do is check whether or not the "trash" list is empty or not. I know the syntax is terrible, but I don't know where/how to include stuff like that.

[PilzAdam]

lol, you just invent your own syntax :D

You cant change the nodebox of a node at runtime.

[Evergreen]

lol, you just invent your own syntax :D

You cant change the nodebox of a node at runtime.

Huh boy, I was hoping that I could do it that way. How else can I do it? How do I make it change nodeboxes and still keep the same metadeta and formspec?

[Pavel_S]

Can I attach nodes to entity, and rotate and move as I want?
Can collision box be multy-blocky?

[kaeza]

Can I attach nodes to entity, and rotate and move as I want?
Can collision box be multy-blocky?

For first question: you can't. Nodes are static. But you can simulate it in the same way as falling nodes are implemented.

For second: I don't think so.

:/

[Pavel_S]

For second: I don't think so.

:/

Yeah I test it. Don`t work=(

How to attach one entity to another entity?

EDIT:
Hey! I can create animated chest.

[Casimir]

Trying to make a skyblock like game, but with water.
The problem is, trees and grass are not growing. Is that because they check for mapgen nodes and I set mapgen_dirt = water ?

[Topywo]

Trying to make a skyblock like game, but with water.
The problem is, trees and grass are not growing. Is that because they check for mapgen nodes and I set mapgen_dirt = water ?

Maybe this helps you:

A bit older versions of default use for dirt with grass (init.lua)
groups = {crumbly=3},

A later version I have (default, but now in nodes.lua) uses
groups = {crumbly=3,soil=1},

As far as I understood saplings are made into trees in c++ (content_abm.cpp) which checks the presence of [soil].

[Casimir]

I updated and now it works. Thank you.

[Evergreen]

Question: Do skins from minecraft work in minetest? I need a template for my skin, and was wondering if one from minecraft would work in minetest.

[webdesigner97]

Question: Do skins from minecraft work in minetest? I need a template for my skin, and was wondering if one from minecraft would work in minetest.

Yes, the Minecraft 3D skins are 100% compatible to the player model in Minetest

[Evergreen]

Question: Do skins from minecraft work in minetest? I need a template for my skin, and was wondering if one from minecraft would work in minetest.

Yes, the Minecraft 3D skins are 100% compatible to the player model in Minetest

Okay, thanks. :D

[AndrOn]

How do you use a global function?
i've tried to do my own sprint mod but first I have to change the speed of the player. So I tried this:

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Code: Select all

minetest.register_chatcommand("run", {
    params = "",
    description = "run",
    func = function(name, param)
       
        set_physics_override(3, 1.2, 1);
       
       
            minetest.chat_send_player(name, "You are now running");
       
           end,
})



But when I type the command /run it crashes, displaying:

error: attempt to call global 'set_physics_override' (a nil value)

[PilzAdam]

How do you use a global function?
i've tried to do my own sprint mod but first I have to change the speed of the player. So I tried this:

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Code: Select all

minetest.register_chatcommand("run", {
    params = "",
    description = "run",
    func = function(name, param)
       
        set_physics_override(3, 1.2, 1);
       
       
            minetest.chat_send_player(name, "You are now running");
       
           end,
})



But when I type the command /run it crashes, displaying:

error: attempt to call global 'set_physics_override' (a nil value)

Oh man, fix your indentation.

The set_physics_override function is a part of a player object. You can get a reference to it by using something like minetest.get_player_by_name(name), so your code should look like this:

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Code: Select all

minetest.register_chatcommand("run", {
    params = "",
    description = "run",
    func = function(name, param)
        minetest.get_player_by_name(name):set_physics_override(3, 1.2, 1)
        minetest.chat_send_player(name, "You are now running")
    end,
})



[AndrOn]

Thanks PilzAdam I am new to lua (sorry for the indentation). I didn't knew the object handling in lua. However I have another error with my new code which is:

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Code: Select all

minetest.register_chatcommand("run", {
    params = "",
    description = "run",
    func = function()
    for _, p in ipairs(minetest.get_connected_players()) do
            p:set_physics_override(3, 1.2, 1)
            end
    end,
})

(yes for the moment it affects all the players but I couldn't load your code and I want to use it in singleplayer for the moment)

the error when I type /run:

error: 15 : attempt to call method 'set_physics_override' (a nil value)

(better for the indent btw? ;)

[PilzAdam]

Thanks PilzAdam I am new to lua (sorry for the indentation). I didn't knew the object handling in lua. However I have another error with my new code which is:

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Code: Select all

minetest.register_chatcommand("run", {
    params = "",
    description = "run",
    func = function()
    for _, p in ipairs(minetest.get_connected_players()) do
            p:set_physics_override(3, 1.2, 1)
            end
    end,
})

(yes for the moment it affects all the players but I couldn't load your code and I want to use it in singleplayer for the moment)

the error when I type /run:

error: 15 : attempt to call method 'set_physics_override' (a nil value)

(better for the indent btw? ;)

I guess you use a too old version of Minetest (you need 0.4.7 IIRC).

Also, indentation is still not completly correct :-p

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

minetest.register_chatcommand("run", {
    params = "",
    description = "run",
    func = function()
            for _, p in ipairs(minetest.get_connected_players()) do
                    p:set_physics_override(3, 1.2, 1)
            end
    end,
})

[AndrOn]

I guess you use a too old version of Minetest (you need 0.4.7 IIRC).

Also, indentation is still not completly correct :-p

Thanks it works! Time to add some particles like in minecraft (and make a less nasty code + improve indentation... I usually code on codeblocks rightclick->format this file)

Also, someone should update the wiki about the new mods directory because I found it tricky

[bdjnk]

When one does a register_on_dignode, is there some way to get the oldnode's metadata? You know, because get_meta(pos) will get the new metadata, which is null...

[BlockMen]

When one does a register_on_dignode, is there some way to get the oldnode's metadata? You know, because get_meta(pos) will get the new metadata, which is null...

Use

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Code: Select all

after_dig_node = function(pos, oldnode, oldmetadata, digger)

in node definition instead

[bdjnk]

When one does a register_on_dignode, is there some way to get the oldnode's metadata? You know, because get_meta(pos) will get the new metadata, which is null...

Use

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

after_dig_node = function(pos, oldnode, oldmetadata, digger)

in node definition instead

Hm, yes, well that would be fine if I was just doing it for one type of node, but I was thinking for any type of diggable node.