Post your modding questions here

[taikedz]

Not sure what you mean

But yes, in the example version I posted, 'user' is indeed an object. You might have wanted my_function(user:get_player_name()) afterwards

[Nyarg]

Hi all )
Why ? lua.init for example contain only:

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Code: Select all

local modName = minetest.get_current_modname()
     print(modName)

minetest.register_on_generated( function( minp, maxp, seed)
     local modName = minetest.get_current_modname()
     print(modName)
end)


First minetest.get_current_modname() return real mod name.
Second call return nil.

[rubenwardy]

Get current mod name only works at load time

[Hybrid Dog]

You may want to do this:

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Code: Select all

minetest.after(0, function()
   local t = minetest.registered_on_generateds
   for i = 1, #t do
      local func = t[i]
      t[i] = function(...)
         print(minetest.get_current_modname())
         return func(...)
      end
   end
end)


[Nyarg]

Some difficult for me ) will be tested.
At a glance it seems like each function in minetest.registered_on_generateds will be merged with print(minetest.get_current_modname()).

Another question.
Is here a way to make nodes (adding new during game experience) dynamically like:

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Code: Select all

 minetest.register_on_punchnode(function(pos, node, puncher, pointed_thing)
    minetest.register_node(name,def)
end)

At end of my experiments I have new nodes in my inventory but without texture.

+ Spoiler

I may set node on ground and iterate properties but F5 see nothing when I point at and field mod_origin = "??" .

+ Spoiler

+ Spoiler

I search trought mods for using minetest.register_node() and have not found somethig like dynamic node register.

+ Spoiler

[Hybrid Dog]

Note that the nodedefs use metatable, so to get the real content, you may need to use rawget(t, i).

[taikedz]

NOde registration needs to be done at load time.

You should register everything in advance then. It is possible to exclude nodes from the creative inventory.

What game play mechanic are you trying to achieve?

[Nyarg]

Note that the nodedefs use metatable, so to get the real content, you may need to use rawget(t, i).

Feelings like I want RTFM minetest source code )

What game play mechanic are you trying to achieve?

For example it's particular saw results maked when I need it, instead as in [moreblocks] mod where as I see miniblocks is predefined in *.obj

[taikedz]

moreblocks registers nodes in advance, but these cannot be accessed via the creative inventories. Only the circular_saw can return a list of resulting nodes.

What you could do is add a "createdyet" property to your node definition, and make a tool that returns only nodes whose "createdyet" property is true.

You can then register all your nodes in advance, and set the "createdyet" property to false.

When you need to "dynamically" register you node, simply set the "createdyet" property to true

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Code: Select all

minetest.registered_nodes["mymod:dynamicnode"].createdyet = true


[azekill_DIABLO]

node should be registered on map creation. a tab in invetory should be created.

[Nyarg]

Ok. Lets turn question another side )
If I don't know what node I need on loadTime (inAdvance) what's way to make or simulate it after loadTime.
I only see way to make 100500 nodes that I manage during play (as taikedz said if I am properly understand)

For example lets look at game play mechanic like dirting lower border of node depend from nearest nodes.
In that case we have free texture combinig during play.
In simple it's give us full cartesian product of results.

[Byakuren]

There is no other way. When/if changing the properties of individual nodes becomes possible, one way to do it would be with those parts of the API.

[orwell]

We would need texture overriding from node metadata

[Hybrid Dog]

If you play LEGO you also can only change the bricks you have if you leave and rejoin the world where you build.

[PlanetKiller]

Trying to make a tool that turns nodes into air.

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Code: Select all

minetest.register_tool("matblox:air_rod", {
   description = "Air Rosin",
   inventory_image = "matblox_air_rod.png",
   
   
   
   on_use = function(pos, node, clicker)
      --local x = 0
      --local y = 0
      --local z = 0
      local final = 10
      local target = node
      for a=0,final,1 do
         for b=0,final,1 do
            for c=0,final,1 do
               local newnode = minetest.get_node(pos)
               if target.name == newnode.name then
                  minetest.set_node({x = pos.x+a, y = pos.y+b, z = pos.z+c}, {name = "core.CONTENT_AIR "})
               end         
            end
         end
      end
   end
})


on_rightclick didn't work, and this keeps giving me a c++ exception.
It is supposed to take the block it is over, then turn all similar blocks into air; for quick map clearing.

[cx384]

name = "core.CONTENT_AIR"

I think this should be name = "air"

[azekill_DIABLO]

"" this what it should be.

[PlanetKiller]

Thanks, but

2016-09-26 10:50:22: ERROR[Main]: ServerError: Lua: Runtime error from mod 'matblox' in callback item_OnUse(): C++ exception

it didn't solve the problem.

It seems that on_use is not getting the node, and I can't seem to get the node from the position. Tried printing their names, but no luck. Tried on_dig and on_punch without any luck either.

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Code: Select all

on_use = function(itemstack, user, pointed_thing)
   print(pointed_thing.name)
end


This outputs nil, but I'm pointing at a node.

[rubenwardy]

"" this what it should be.

Nope, "air"

("" is the name of the hand)

[azekill_DIABLO]

"" this what it should be.

Nope, "air"

("" is the name of the hand)

you're true. sorry.

[sofar]

Nodes need to be registered at mod init time. You can not add new nodes afterwards.

So you can do this in init.lua:

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Code: Select all

minetest.register_node("node:name", {})

But you cannot do this:

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Code: Select all

minetest.after(0, minetest.register_node, "node:name", {})

[orwell]

Thanks, but

2016-09-26 10:50:22: ERROR[Main]: ServerError: Lua: Runtime error from mod 'matblox' in callback item_OnUse(): C++ exception

it didn't solve the problem.

It seems that on_use is not getting the node, and I can't seem to get the node from the position. Tried printing their names, but no luck. Tried on_dig and on_punch without any luck either.

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

on_use = function(itemstack, user, pointed_thing)
   print(pointed_thing.name)
end


This outputs nil, but I'm pointing at a node.

You know what pointed_thing is? it's NOT a node. Look in lua_api what it contains, probably pointed_thing.under is what you want.
Remember to check if pointed_thing.under actually exists, you may be clicking an object...
For LUA it is irrelevant how function arguments are named, the order matters. lua_api tells in which order arguments are passed to the function (e.g.the first argument is a position, the second the player and the third is pointed_thing). Just reordering argument names does definitely not work.

It's 'air', not ''.

[ulla]

Hi all and thanks advance , i make my new mod named summer i have put :
big umrella open and closed ,deckshair, lobster, big ballon ,air mattress etc...
now i need a little help for add simple function sit or lay on_rightclick ,
but but I found nothing on internet,
i have see beds but can only sleep, and boat are mixed with driver function , i have registered a node and i want the player can lay on the node with right click pls Help
sorry for my bad english

[Icalasari]

How exactly would I have minetest.get_node work to ensure a node needs space to spread, or only does a certain action if a certain node is above it? I tried looking into it when looking at the tutorial guide for modding but it doesn't seem to explain anything beyond, "Just use minetest.get_node to stop the destruction"

I guess a specific way to figure it out (as I still want to puzzle out the execution I want to try later on) is, with the alien grass example, how would I used get_node to make it only spread if the blocks it spreads to have air above them?

[ManElevation]

how do you make a mod topic

[PlanetKiller]

How exactly would I have minetest.get_node work to ensure a node needs space to spread, or only does a certain action if a certain node is above it? I tried looking into it when looking at the tutorial guide for modding but it doesn't seem to explain anything beyond, "Just use minetest.get_node to stop the destruction"

I guess a specific way to figure it out (as I still want to puzzle out the execution I want to try later on) is, with the alien grass example, how would I used get_node to make it only spread if the blocks it spreads to have air above them?

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Code: Select all

if minetest.get_node({x = pos.x, y = pos.y+1, z = pos.z}).name == "air" then
    minetest.set_node({x = pos.x, y = pos.y+1, z = pos.z}, {name = "alien:grass"})


[pithy]

how do you make a mod topic

You can only post in the WIP mods section.

[Icalasari]

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 minetest.get_node({x = pos.x, y = pos.y+1, z = pos.z}).name == "air" then
    minetest.set_node({x = pos.x, y = pos.y+1, z = pos.z}, {name = "alien:grass"})


Huh, wonder why it looks that slightest bit different

Thank you, seeing it laid out like this actually answered a few other questions that I was leaving for later as well (although I bet the code for those things is going to be sloppy as hell, but hey, learning)

[PlanetKiller]

Because I wrote a tree generating procedure that uses loops for creating a tree and modified a couple lines I copied from it. I'm playing around with modding trees and adding trees using the default nodes and active block modifiers. Thinking about starting with NPCs, but path-finding has always been a problem for me. Maybe I could add a specific node that can only be removed with an item, or use a set of coordinates.

[ulla]

Hi all and thanks advance , i make my new mod named summer i have put :
big umrella open and closed ,deckshair, lobster, big ballon ,air mattress etc...
now i need a little help for add simple function sit or lay on_rightclick ,
but but I found nothing on internet,
i have see beds but can only sleep, and boat are mixed with driver function , i have registered a node and i want the player can lay on the node with right click pls Help
sorry for my bad english

some help?