Post your modding questions here

[Sokomine]

series of items that upon right clicking on the ground, generates a small hollow cube (probably 5x5) w

Items can react to rightclick via on_rightclick(pos, node, clicker, itemstack, pointed_thing). For spawning entire buildings, schematics are helpful (place_schematic). If the intended building is as tiny as shown in your sample, using minetest.add_node might also be sufficient.

[durtective6]

Items can react to rightclick via on_rightclick(pos, node, clicker, itemstack, pointed_thing). For spawning entire buildings, schematics are helpful (place_schematic). If the intended building is as tiny as shown in your sample, using minetest.add_node might also be sufficient.

I plan on using the building shown in the screenshot in my previous post, but each version will have something instead of the red wool. How would I make it so an item spawns the building, I don't know what to do for it; I haven't really played around with these kind of things before. Thanks for the reply.

[Enke]

Is there any way to get an ore to spawn in both stone and desert stone without having to create a seperate minetest.register_ore? Like: wherein = "default:stone, default:desert_stone"?

[paramat]

any way to write a pseudo-air node?

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minetest.register_node("modname:airlike", {
    description = "Airlike Node",
    drawtype = "airlike",
    paramtype = "light",
    sunlight_propagates = true,
    walkable = false,
    pointable = false,
    diggable = false,
    buildable_to = true,
    is_ground_content = false,
})

'is_ground_content = false' will stop cavegen eating the node if the node is added by a mod 'on generated chunk'.

[ak399g]

I'm trying to write a mod that plays music at dawn and dusk.

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minetest.register_globalstep(
    function(dtime)
        if minetest.env:get_timeofday() == 0.2
        then minetest.sound_play("sunsong")
        end
    end
)

minetest.register_globalstep(
    function(dtime)
        if minetest.env:get_timeofday() == 0.8
        then minetest.sound_play("sunsong")
        end
    end
)

This doesn't work. I don't know enough to know why.

Second: How would one go about writing a chat_command that stops time? I.E. "/stoptime" to halt the world clock, and "/starttime" to set it going again?

[Sokomine]

'm trying to write a mod that plays music at dawn and dusk.

Take a look at my bell mod at github. It does slightly more than you want (plays a sound each hour and repeats it as much times as the time demands).

Second: How would one go about writing a chat_command that stops time?

"/set time_speed 0" ought to do.

[kaeza]

I'm trying to write a mod that plays music at dawn and dusk.

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Code: Select all

minetest.register_globalstep(
    function(dtime)
        if minetest.env:get_timeofday() == 0.2
        then minetest.sound_play("sunsong")
        end
    end
)

minetest.register_globalstep(
    function(dtime)
        if minetest.env:get_timeofday() == 0.8
        then minetest.sound_play("sunsong")
        end
    end
)

This doesn't work. I don't know enough to know why.

globalstep works ca. every 0.05s, I think, so minetest.env:get_timeofday() won't be exactly 0.8 or 0.2. You could use math.floor and check if the play_sound was already started 2s ago to avoid playing it more times.

Something like this should work

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local is_day
minetest.register_globalstep(
    function(dtime)
        local t = minetest.get_timeofday()
        local new_is_day = (t >= 0.2) and (t < 0.8)
        if is_day == nil then
            is_day = not new_is_day
        end
        if new_is_day ~= is_day then
            if new_is_day then
                minetest.sound_play("rooster") -- Dawn
            else
                minetest.sound_play("wolf") -- Dusk
            end
            is_day = new_is_day
        end
    end
)


[Krock]

I would let it only try to work every 10s:

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local is_day
local t0 = 0
minetest.register_globalstep(
    function(dtime)
        t0 = t0+dtime --[dtime] = ms
        if t0 < 10000 then
            return
        end
        t0 = 0
...


"dtime" is a double/float/decimal number, it counts in seconds. (ex. 0.06661337)

[Amaz]

Is there any way to get items into bones that are in a detached inventory? I would like to get armor from Stu's armor mod into bones, and I'm using 0gb.us' inventory_plus mod. I don't mind modifying the bones mod itself...

[stu]

Is there any way to get items into bones that are in a detached inventory? I would like to get armor from Stu's armor mod into bones, and I'm using 0gb.us' inventory_plus mod. I don't mind modifying the bones mod itself...

Funny, I'd never even thought about that. You shouldn't really need to modify bones, perhaps use register_on_dieplayer in armor to transfer the detached inventory to main. I think that should work but I will try to add something like that myself, now that bones are in the default minetest_game (since a while back actually)

[NathanRandallHolt]

What does register_ore do if you specify sheet distribution? Does it create various flat deposits like clusters of magnetite and micro line in Dwarf Fortress? Does it create an intermittent sheet of ore that spans the world? If the latter, what determines the altitude of the sheet? Is it the min, the max, the average, or something else? Could someone provide an example of how to use it?

[addi]

what value does return 'player:get_look_yaw()' (something between 1,5 and -4,6????) and how can i convert it into 0-360 degree?

[addi]

what value does return 'player:get_look_yaw()' (something between 1,5 and -4,6????) and how can i convert it into 0-360 degree?

I tried it out some time ago. I saved the yaw with get_look_yaw and added it back to the player but somehow it didn't work. "It [...] pretty randomly as of now."

uhh it all hurts in my head.
but i get closer to the solution:

that function returns a radiant like this:

Degree-Radian Conversion [Public domain], by Inductiveload (Own work), from Wikimedia Commons

that can be easily converted to degrees :

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local grad = player:get_look_yaw()*180/math.pi

so now i have degrees. but the cero pount is on the left. this can be fixed with this:

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grad = grad -90;
if grad < 0 then grad = grad + 360 end

ok now is the 0° on the top and 180° on the bottom.

but: 270° are on the left side and 90° are on the right side!?

is somebody good in math and is there a way to rotate this ?

one solution could be a switch case with 360 entries... but i hobe there is a better way.

[CWz]

Can someone please tell me what's wrong with this code. I can't seem to get it to work.

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if minetest.check_player_privs(name, {interact=false}) then
    minetest.after(3.5, player:setpos(x=0,y=15,z=0))
end

[Sokomine]

The player:setpos call is evaluated (and thus executed) immediately, and the return value of that function (whatever that may be) is passed on to minetesminetest.after. Use

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minetest.after(3.5, myfunction, player,{x=0,y=15,z=0} )


and do the setpos in myfunction:

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myfunction = function( player, pos )
      if( player and pos ) then
          player:setpos( pos );
     end
end


(untested)

[domtron vox]

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if grad < 0 then grad = grad + 360 end

It would be better to do this instead:

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grad = grad % 360 --returns the remainder after dividing by 360

This will force grad to be within 0-360 whether grad is positive or negative and will not effect it if it is in that range. As a bonus it will automatically convert 360 to 0.


As for get_look_yaw I have no clue what it is doing but if it is returning a normal radian value then your code local grad = player:get_look_yaw()*180/math.pi should convert the angle to degrees where 0/360 is on the right.

It sounds like your axis is flipped like so:

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    90
     |
0 -       - 180
     |
    270


so if you just subtract 90 each value moves clockwise one position

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        0
        |
270 -       - 90
        |
       180


First of all you should subtract 180 to get 0 on the right. However, rotating your axis isn't what you want to do(that is if you want 0 to be on the left and 90 up). Instead you need to flip the entire axis like this:

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         90
        |
180 -       - 0
        |
        270


I'm not sure how to do this off the top of my head, but if I get some time I'll think about it.

[addi]

uff i got breaked my head now and ... finaly found a solution:

the function player:get_look_yaw() returns a radian in that format:

Degree-Radian Conversion [Public domain], by Inductiveload (Own work), from Wikimedia Commons

but a more common human readable use of degrees are that:


my problem was converting the first one to the secound one so it can be used.

here the final function:

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        local degree = player:get_look_yaw()*180/math.pi - 90; --transform rad into deg and move the cero point to the top.
        if degree < 0 then degree = degree + 360 end; --if there are some negative values fix it by adding 360° to it.
        degree = -(degree-360); this fixes the problem, that it counts up against clockwise. -> flip it to count clocwise now


and now we made that:
into that:


now i have headache but im happy that it works now. :)
if somebody has acces to write that down on the dev-wiki i think a lot of other people can save that thoughts i alredy made.

so minetest does not return "pretty randomly" values from now on.

[CWz]

The player:setpos call is evaluated (and thus executed) immediately, and the return value of that function (whatever that may be) is passed on to minetesminetest.after. Use

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minetest.after(3.5, myfunction, player,{x=0,y=15,z=0} )


and do the setpos in myfunction:

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myfunction = function( player, pos )
      if( player and pos ) then
          player:setpos( pos );
     end
end


(untested)

I am trying to have it so a player who doesn't have interact gets teleported back to spawn after a short period of time.

[Krock]

I am trying to have it so a player who doesn't have interact gets teleported back to spawn after a short period of time.

I've done that in my jail-feature in my server.

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local ttime = 0
minetest.register_globalstep(function(dtime)
    ttime = ttime + dtime
    if ttime < 8 then
        return
    end
    ttime = 0
    local players = minetest.get_connected_players()
    for _,player in ipairs(players) do
        local pos = player:getpos()
        if(pos.x < 20 and pos.x > -20 and
            pos.z < 20 and pos.z > -20) then
        player:setpos({x=0, y=5, z=0})
        minetest.chat_send_player(player:get_player_name(), "Go back!")
        end
    end
end)

It's possible to go around this protection by moving around alot.

[mimilus]

Hello

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What's wrong whit this

minetest.register_node("castle:secret_stonewall",{
    description = "Stonewall secret Wall",
    tiles = { 'castle_stonewall.png' },
    drawtype= "nodebox",
    paramtype = "light",
    node_box = {
        type = "fixed",
        fixed = {
            {0.375,-0.5,-0.5,0.5,0.5,0.5}, --NodeBox1
            {-0.5,-0.5,-0.5,-0.375,0.5,0.5}, --NodeBox2
        },
        selection_box={
            type="fixed",
            {0.375,-0.5,-0.5,0.5,0.5,0.5}, --NodeBox1
            {-0.5,-0.5,-0.5,-0.375,0.5,0.5}, --NodeBox2
    },
    groups = {choppy=2,dig_immediate=2},
    }
})


I can't remove the node

[Krock]

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Code: Select all

minetest.register_node("castle:secret_stonewall",{
    description = "Stonewall secret Wall",
    tiles = { 'castle_stonewall.png' },
    drawtype= "nodebox",
    paramtype = "light",
    node_box = {
        type = "fixed",
        fixed = {
            {0.375,-0.5,-0.5,0.5,0.5,0.5}, --NodeBox1
            {-0.5,-0.5,-0.5,-0.375,0.5,0.5}, --NodeBox2
        },
        selection_box={
            type="fixed",
            {0.375,-0.5,-0.5,0.5,0.5,0.5}, --NodeBox1
            {-0.5,-0.5,-0.5,-0.375,0.5,0.5}, --NodeBox2
    },
---groups = {choppy=2,dig_immediate=2},
    }
+++groups = {choppy=2,dig_immediate=2},
})

put the groups 1 line down.

[mimilus]

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Code: Select all

minetest.register_node("castle:secret_stonewall",{
    description = "Stonewall secret Wall",
    tiles = { 'castle_stonewall.png' },
    drawtype= "nodebox",
    paramtype = "light",
    node_box = {
        type = "fixed",
        fixed = {
            {0.375,-0.5,-0.5,0.5,0.5,0.5}, --NodeBox1
            {-0.5,-0.5,-0.5,-0.375,0.5,0.5}, --NodeBox2
        },
        selection_box={
            type="fixed",
            {0.375,-0.5,-0.5,0.5,0.5,0.5}, --NodeBox1
            {-0.5,-0.5,-0.5,-0.375,0.5,0.5}, --NodeBox2
    },
- -    }
++   },
groups = {choppy=2,dig_immediate=2},
})

Thx it works now

[NathanRandallHolt]

What does register_ore do if you specify sheet distribution? Does it create various flat deposits like clusters of magnetite and micro line in Dwarf Fortress? Does it create an intermittent sheet of ore that spans the world? If the latter, what determines the altitude of the sheet? Is it the min, the max, the average, or something else? Could someone provide an example of how to use it?

I've experimented with register_ore with sheet distrubution, and it doesn't seem to do anything. I think if I want deposits similar to what I find in Dwarf Fortress, I'll have to implement all the ore placement myself. It seems reasonable to implement the entire map generation similar to the way the mg mod does.

[mimilus]

Is there a tip for order items in inventory when we create nodes ?

In the inventory my nodes don't follow the order of creation in init.lua


Is it possible to group them by mod in the inventory ?

[Topywo]

Is there a tip for order items in inventory when we cran nodes ?

In the inventory my nodes don't follow the order of creation in init.lua


Is it possible to group them by mod in the inventory ?

I always thought the nodes/items are grouped by mod in the inventory and inside a mod the nodes/items are in alphabetical order following the name under 'description'. I've not checked if this is true.


Edit: Double quote removed.

[durtective6]

Hi, im trying to add something to my mod but don't know how. I've experimented and tried different stuff, but had no success.
How would i make a tool/item that, on the user right clicking, places a block (effectively this is an item that allows the user to have an infinite source of a block, e.g. cobble).
Thanks for any feedback.

[Casimir]

Something like this.

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on_place = function(itemstack, placer, pointed_thing)
    local under = minetest.get_node(pointed_thing.under)
    local above = minetest.get_node(pointed_thing.above)
    -- check for rightclick
    local reg_node = minetest.registered_nodes[under.name]
    if reg_node.on_rightclick then
        reg_node.on_rightclick(pointed_thing.under, under, placer)
        return
    end
    -- place plant
    if above.name == "air" then
        above.name = "default:cobble"
        minetest.place_node(pointed_thing.above, above, placer)
        minetest.sound_play("default_place_node", {pos = np, gain = 0.5})
--        remove one item
--        itemstack:take_item(1)
--        return itemstack
    end
end

[durtective6]

How would I merge that with a tool? Also I'm guessing the itemstack:take_item(1) means take 1 cobble from an available stack (I've never really played around with this kind of stuff); if this is the case, would I change (1) to (0) to make it so you can place an infinite amount?
Thanks for the help.

[Casimir]

You put it into the item definition, just like on_use. Don't forget to add a "," at the end. The "take_item" part is commented, so it will do nothing. I just kept it in there for reverence.

[Kilarin]

Strange question:
I've created a tool, and I want to know what item is in the active inventory slot next (just to the right) of the slot where the tool is.

So, for example, if your inventory looks like:

[pickaxe] [99 stone] [shovel] [28 torches] [bucket of water] [empty] [99 glass] [50 wood]

and you are using the pickaxe. How could the pickaxe find out that there is a stack of 99 stone in the slot to the right of it?

Thanks

edit: Would this require a use of get_wield_index() to find the index where the pickaxe is, but then how do I pull the item at index+1 (checking to ensure index returned is<8 of course)
Any examples would be greatly appreciated.