Post your modding questions here

[stu]

Thanks, even though that is sad news. I got 90% of the way through making a sword with dynamic sound effects only to get snagged on the on_use override. Maybe I can have it set_hp() if pointed_thing is an object ... object.is_player() ... ?

I really wish the engine had some sort of register-damage function.

I was about to suggest the after_use callback but this only called after a node is dug and I’m not sure if it is even called at all for players or entities.

I came up with this idea which essentially allows you to add a ‘sounds’ table to any tool definition. Unfortunately due to limitations of the api this will only work when you hit nodes or players, not entities.

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Code: Select all

minetest.register_on_punchnode(function(pos, node, puncher)
   local tool = puncher:get_wielded_item()
   if tool then
      local def = tool:get_definition()
      if def and def.sounds and def.sounds.node then
         minetest.sound_play(def.sounds.node, {pos=pos})
      end
   end
end)

minetest.register_on_punchplayer(function(player, hitter)
   local tool = hitter:get_wielded_item()
   if tool then
      local def = tool:get_definition()
      if def and def.sounds and def.sounds.player then
         minetest.sound_play(def.sounds.player, {object=player})
      end
   end
end)

-- example tooldef

minetest.register_tool("soundfx:pick_glass", {
   description = "Glass Pickaxe",
   inventory_image = "soundfx_pick_glass.png",
   tool_capabilities = { ... },
   sounds = {
      node = "default_break_glass",
      player = "default_break_glass",
   },
})


It seems a bit incomplete that we should have on_punchnode and on_punchplayer but no equivalent for entities :(

[AnxiousInfusion]

Thanks, stu. That works like a charm although I do also want to try the method recommended by Byakuren. The goal is to have a sound for swinging at nothing, a sound for hitting entities and a sound for hitting nodes.

Here is a video demonstrating my original implementation:

https://youtu.be/TkPVr4tVkwI

And my original code:

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Code: Select all

   on_use = function(itemstack, user, pointed_thing)
   if pointed_thing.type == "object" then
      minetest.sound_play("blade_strike_flesh", { pos = minetest.get_pointed_thing_position(pointed_thing, above), max_hear_distance = 10 })
   elseif pointed_thing.type == "node" then
      minetest.sound_play("blade_strike_surface", { pos = minetest.get_pointed_thing_position(pointed_thing, above), max_hear_distance = 10 })
   elseif pointed_thing.type == "nothing" then
      minetest.sound_play("blade_strike", { pos = user:getpos(), max_hear_distance = 10 })
   else
      minetest.debug("Player struck something that is somehow not an object, node, nor air.")
   end

[taikedz]

Interesting (and fun!) use case.

I once tried to do a very brittle tin dagger: https://github.com/taikedz/moreores/blo ... ua#L16-L31 (merge was not accepted as it was such a dirty hack :-P)

But in that implementation, it cannot dig nodes anymore. The entity hitting routine works as expected.... I think...... never seen any mobs with anything other than "fleshy" armor....

A dirty workaround could be to register node punch routine and check for your tool:

http://dev.minetest.net/minetest.register_on_punchnode

The code for the sound etc would be on the node callback instead of in the tool.

The upside of this is that you can check for damage groups and play a sound accordingly for crumbly nodes, cracky nodes, etc.

You can also check for node groups - cracky, crumbly, choppy, etc - and adapt the sound as desired. Should affect all nodes that a player could punch.

Down side is, we're still not sure how to implement the digging with the tools....

[orwell]

Ah, yes ... a "s" is missing. I mean default-objects, like stone, sand ...

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Code: Select all

core.register_chatcommand("ilist", {
   params = "[search term]",
   description = "list item ids",
   privs = {},
   func = function(name, param)
      --minetest.chat_send_player(name, "")
      local parami=""
      if param~=nil then
         parami=param
      end
      minetest.chat_send_player(name,"------------------------nodes")
      for n, i in pairs(core.registered_nodes) do
         if string.find(n, parami, 1, true) then
            minetest.chat_send_player(name, n)
         end
      end
      minetest.chat_send_player(name,"------------------------tools")
      for n, i in pairs(core.registered_tools) do
         if string.find(n, parami, 1, true) then
            minetest.chat_send_player(name, n)
         end
      end
      minetest.chat_send_player(name,"------------------------craftitems")
      for n, i in pairs(core.registered_craftitems) do
         if string.find(n, parami, 1, true) then
            minetest.chat_send_player(name, n)
         end
      end

   end,
})


a chatcommand that lists item names (these default:???). Put anywhere and execute it with search term 'default'

[BrunoMine]

how to remove a recipe of default mod? (is possible?)
(not want change the source code of the default mod)

[azekill_DIABLO]

how to remove a recipe of default mod? (is possible?)
(not want change the source code of the default mod)

You must ghange crafts.lua to do this. or do a mod that override the craft of the item (with air).

[BrunoMine]

override the craft of the item (with air).

Could you show me a any code for example? Please.

[azekill_DIABLO]

rah.

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Code: Select all

minetest.register_craft({
   output = 'default:sword_wood',
   recipe = {
      {""},
   }
})

EDIT: won't work, idk how to make what you want possible without modifing the code of default.

[BrunoMine]

I do not want to change the source code.

Is there a way to do this without changing the mod source?

[DS-minetest]

in api you got this

[azekill_DIABLO]

oh thanks!

EDIT: it won't work. won't work at all, the game says the value is nil. Seem to not exist.

EDIT2: it's the api from 4.14 dev no? because it is not in the 4.14 api i have in minetest\doc:

[Havocado]

Am I able to change/add to the functionality of an existing node? I'd like to add to the possible drops of a few different nodes.

[azekill_DIABLO]

sure you can. check lua api.

[pithy]

Am I able to change/add to the functionality of an existing node? I'd like to add to the possible drops of a few different nodes.

Use minetest.override_item() it works just like minetest.register_node() but you only specify what you want to change.

[pithy]

Is there a way to make a node kill you when it falls on your head?

[azekill_DIABLO]

when it falls, it's an entity. you should override it. check builtin dir.

[Nyarg]

Use minetest.override_item() it works just like minetest.register_node() but you only specify what you want to change.

Is it must be done at loadTime too ?
Where do I find full list of functions that marked as workable only at loadTime ?

[Hybrid Dog]

How can l transform a registered item, which is not a node, to a placeable registered node?

[orwell]

try to re-register it as node (minetest.register_node(":mod:item", {def})

[orwell]

Use minetest.override_item() it works just like minetest.register_node() but you only specify what you want to change.

Is it must be done at loadTime too ?
Where do I find full list of functions that marked as workable only at loadTime ?

It's logical what may be called at load time only. registered nodes cant be changed after they may have been sent to clients. (you can call register_node after load time but it causes bugs on logged-in clients.)

[pithy]

when it falls, it's an entity. you should override it. check builtin dir.

It looks like it uses the same entity for all nodes.
I only want to make one node kill you when it falls on your head.

[azekill_DIABLO]

make a new falling node system then.

[Byakuren]

when it falls, it's an entity. you should override it. check builtin dir.

It looks like it uses the same entity for all nodes.
I only want to make one node kill you when it falls on your head.

The falling node entity carries information about the node, so you can check the node name to make sure you only kill people if it's your node.

[D00Med]

Does anyone know why this doesn't work when damage is enabled? The problem seems to be the "if player:hud_get(fr1) == nil", but I don't understand why, or how to get around the problem. It works fine on creative.

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Code: Select all

function tool_anim(player, interval, frame1, frame2, frame3)
   if player:hud_get(fr1) == nil then
   fr1 = player:hud_add({
    hud_elem_type = "image",
    position = {x = 0.5, y = 0.5},
    scale = {
      x = -100,
      y = -100
    },
    text = frame1
   })
   end
...(continues)

[Icalasari]

If one wanted to make ambient mobs that at most disappeared and put an item or two in the inventory when a specific tool was used on it, would that be something to code from scratch, or use one of the existing mob APIs for? I'm doing a "bug collecting" mod for my first mod, but other than the tarantula, the others wouldn't need anything complex behaviour wise outside of flight nor a health system, but at the same time I'm not even sure where to begin with making custom AI, and I'm not even sure if Minetest has AI in it as a default

Guess maybe a better way of wording the question is:

If the most complex behaviour a mob may show is flight with a preference of seeking either dark or light along with sky, would it be better to do an AI from scratch to package with the mod, or use MobRedo? And if the former, is there even a resource that would be helpful for that?

[kaeza]

Does anyone know why this doesn't work when damage is enabled? The problem seems to be the "if player:hud_get(fr1) == nil", but I don't understand why, or how to get around the problem. It works fine on creative.
[...]

Where are you initializing `fr1`? The only place you set it in your snippet is after you access that variable.

[D00Med]

I'm not sure I understand, are you saying that because fr1 doesn't exist at first there is a problem?
And if so, why would that mean it only works without damage enabled?

[kaeza]

I'm saying that in your snippet, you use the `fr1` variable before it gets a value (in the `if` block), thus its value may be nil. More context is needed.

[pithy]

when it falls, it's an entity. you should override it. check builtin dir.

Um, how do I override an entity?

[Icalasari]

Sorry for all the questions, but I've got another one

Is there a good guide to metadata anywhere? The Rubenwardy one isn't too clear