Post your modding questions here

[Napiophelios]

shouldn't it be:

Code: Select all

   minetest.clear_craft({
   output = "moreblocks:wood_tile 9",
   recipe = {
      {"default:wood", "default:wood", "default:wood"},
      {"default:wood", "default:wood", "default:wood"},
      {"default:wood", "default:wood", "default:wood"},
   }
})


[FaceDeer]

I actually just filed an issue over this behaviour of clear_craft, it's rather user-unfriendly of it to throw an exception when the craft you're trying to clear doesn't exist rather than just returning false. You can follow the issue here: https://github.com/minetest/minetest/issues/6513

As for a solution, you can wrap the call to clear_craft in a pcall() function like so:

Code: Select all

local success, err = pcall(function() minetest.clear_craft(parameter_recipe) end)


"success" will be a true/false success indicator and "err" will be an error string in the event that an exception is thrown.

[Lone_Wolf]

Might help?
viewtopic.php?f=47&t=18605

[ManElevation]

Need help, can someone one make this code work?
on kill give player gold.

Code: Select all

minetest.register_on_killplayer(
       function(player, hitter, time_from_last_punch, tool_capabilities, dir, damage)
      local player_name = hitter:get_player_name()
     local inventory = hitter:get_inventory()
     inventory:add_item("main",{name="default:gold_ingot"})
         minetest.chat_send_player(player_name, '**You got gold!**')
      end
})

[Krock]

Need help, can someone one make this code work?
on kill give player gold.

First of all, register_on_killplayer does not exist. Instead, we've got a more generic callback register functions: minetest.register_on_player_hpchange and minetest.register_on_punchplayer. Whereas the latter one is interesting in his case, as it provides the puncher's name.
Here's how you could use it:

Code: Select all

minetest.register_on_punchplayer(function(player, hitter, _, _, _, damage)
   if not (hitter and hitter:is_player()) then
      return -- Punched by non-player
   end

   local hp = player:get_hp()
   if hp - damage > 0 or hp <= 0 then
      return -- Player is not dead yet or still dead
   end

   -- Player got killed by player 'hitter'
   local hitter_name = hitter:get_player_name()
   local player_name = player:get_player_name()

   local inv = hitter:get_inventory()
   inv:add_item("main", {name="default:gold_ingot"})

   minetest.chat_send_player(hitter_name, "** You killed " .. player_name
      .. ". Here, have a free gold ingot! **")
end)

Untested but will most likely work

[Byakuren]

Just a warning, that implementation would be exploitable in case a mod adds a way to block damage through register_on_player_hpchange.

[burli]

What does "fertility" in the farming mod means?

Edit: got it.

[fishyWET]

EDIT: managed to fix first two issues, was a sily goof, removed them.

Is it possible to stop a minetest.after timer rather than countering it with another minetest.after timer that gives the opposite value?
Or perhaps a different method that isn't so "hacky"?

[Lejo]

I tried to generate a trial of smoke from a player to another position.

Code: Select all

  local pos = player:getpos() ; pos.y = pos.y +1
  local goal = {x=0, y=0, z=0}
  local dir = vector.direction(pos, goal)
  local dis = vector.distance(pos, goal)
  minetest.add_particlespawner({
   amount = 15*dis,
   time = 1,
   minpos = pos,
   maxpos = pos,
   minvel = dis,
   maxvel = dis,
   minacc = dir,
   maxacc = dir,
   minexptime = 1,
   maxexptime = 1,
   minsize = 15,
   maxsize = 20,
   collisiondetection = false,
   vertical = false,
   texture = "tnt_smoke.png"
  })

The smoke should spawn at the player and disappears at position, but I don't know how to set minvel and maxvel.
Can someone help me?

[ShallowDweller]

sorry if this is the wrong place to ask, but i couldn't find this information anywhere (i googled, browsed github, checked the wiki...).

some mods have other dependencies than "default", but i can't figure out where to download some of said dependencies and there are many mods with similar names, so it is hard to tell if i found the right one. and i don't know if the uploaders are active in the forums (nor if necrobumping is forbiden).

the dependencies i need are the following:
"wool", "flowers", "stairs", "dye", "bucket" and "farming"*
*i belive i may have THIS one, but i'm not sure and i'd like to confirm.

the mods requesting them are:
carpet3d, compost bin and inventorybags.

[Sires]

sorry if this is the wrong place to ask, but i couldn't find this information anywhere (i googled, browsed github, checked the wiki...).

some mods have other dependencies than "default", but i can't figure out where to download some of said dependencies and there are many mods with similar names, so it is hard to tell if i found the right one. and i don't know if the uploaders are active in the forums (nor if necrobumping is forbiden).

the dependencies i need are the following:
"wool", "flowers", "stairs", "dye", "bucket" and "farming"*
*i belive i may have THIS one, but i'm not sure and i'd like to confirm.

the mods requesting them are:
carpet3d, compost bin and inventorybags.

All this dependencies are included in the default Minetest Game subgame, if you are using another subgame that doesn't have them maybe the subgame was not made to have this mods or you would have to get this mods from the Minetest Game subgame

[orwell]

I tried to generate a trial of smoke from a player to another position.

Code: Select all

  local pos = player:getpos() ; pos.y = pos.y +1
  local goal = {x=0, y=0, z=0}
  local dir = vector.direction(pos, goal)
  local dis = vector.distance(pos, goal)
  minetest.add_particlespawner({
   amount = 15*dis,
   time = 1,
   minpos = pos,
   maxpos = pos,
   minvel = dis,
   maxvel = dis,
   minacc = dir,
   maxacc = dir,
   minexptime = 1,
   maxexptime = 1,
   minsize = 15,
   maxsize = 20,
   collisiondetection = false,
   vertical = false,
   texture = "tnt_smoke.png"
  })

The smoke should spawn at the player and disappears at position, but I don't know how to set minvel and maxvel.
Can someone help me?

These are velocity vectors. As far as I can tell from your code, the particles need to make the distance dis (which is a scalar) within 1 second. Because minvel and maxvel are vectors, they tell the velocity and the movement direction at the same time.
You can think of this as follows:
In one second, the particle moves exactly one time the vector's length along the velocity vector, so it's position is then vector.add(pos, vel) (in Minetest semantics)
After 2 seconds, it's vector.add(pos, vector.multiply(vel, 2)) a.s.o.
Because your particles have to move along the vector vector.subtract(goal, pos) in exactly 1 second, your velocity vector (minvel and maxvel) is simply vector.subtract(goal, pos) (which is equal to vector.multiply(dir, dis))
(if you change the expiry time to something different (lets name it 'time'), it will be vector.multiply(vector.subtract(goal, pos), 1/time) )
Acceleration is a vector as well. The procedure is the same like for the position and velocity.
new_velocity = vector.add(old_velocity, vector.multiply(acc, delta_time))
You probably don't want your particles to change their velocity at all, so you should set minacc and maxacc to {x=0,y=0,z=0}.

[Lejo]

Thanks!
The first: vector.subtract(goal, pos) works fine.
But the second: vector.multiply(vector.subtract(goal, pos), 1/time) not. I tested it with time = 5

[ShallowDweller]

All this dependencies are included in the default Minetest Game subgame, if you are using another subgame that doesn't have them maybe the subgame was not made to have this mods or you would have to get this mods from the Minetest Game subgame

thanks! as far as i know, Minetest Game subgame is the only one i have. two of the mods are working. i'll check the rules for necrobumping and report the crash caused by the 3rd one to its autor. thanks for the aid!

[burli]

Do any of you have an example for the new underground decoration? I don't really understand how it works to place something on the floor or the ceiling or both

I was able to place something on the floor, but it was pure luck to find some decoratios

[burli]

I found some decoration with this values

Code: Select all

minetest.register_decoration({
   deco_type = "simple",
   place_on = "default:stone",
   sidelen = 16,
   --~ fill_ratio = 0.5,
   noise_params = {
      offset = 2,
      scale = 0.01,
      spread = {x = 200, y = 200, z = 200},
      seed = 23454,
      octaves = 5,
      persist = 0.9
   },
   biomes = {"underground",},
   decoration = "mapgen:cavefern1",
   height = 1,
   flags = {"all_floors","all_ceilings"},
})


And it looks like this



All decoration is only on this height and in this area. Also it is only placed on the floor, not on the ceilings.

What's wrong? How can I get decoration on any height?

[burli]

I set fill_ratio to 5, just to get everything filled. I found that cave, filled with grass. But hundreds of nodes around, below or above is nothing



In the front you can see a straight cut where the decoration just ends. This can't be correct

[TumeniNodes]

it seems to be being affected by above ground biome paramters?

[christoferlevich]

Does anyone think its possible to enlarge the squares in the inventory formspec, even if it means making the quantity of the inventory smaller? The idea would be to make it easier for students to distinguish denominations of cash in the game. If I could enlarge the bills it would go a long way.

[Vansius]

Topic: How do I manage players and such?
Reason: I want to make a team manager that has a gui where users can join teams.
More Info: I believe not much of this is mentioned in the tutorial book.

[cx384]

Topic: How do I manage players and such?
Reason: I want to make a team manager that has a gui where users can join teams.
More Info: I believe not much of this is mentioned in the tutorial book.

You can find everything there:
https://github.com/minetest/minetest/bl ... ua_api.txt

[azekill_DIABLO]

Does anyone think its possible to enlarge the squares in the inventory formspec, even if it means making the quantity of the inventory smaller? The idea would be to make it easier for students to distinguish denominations of cash in the game. If I could enlarge the bills it would go a long way.

The place where the items are? i don't think it's possible, howver you can change gui_size to something bigger, it should maybe work. Or maybe it only works for menu.

[burli]

it seems to be being affected by above ground biome paramters?

Not really. I made a video and opened an issue

https://www.youtube.com/watch?v=f-6g16ahCIs

Doesn't look like an effect from other biomes.

[orwell]

Does anyone think its possible to enlarge the squares in the inventory formspec, even if it means making the quantity of the inventory smaller? The idea would be to make it easier for students to distinguish denominations of cash in the game. If I could enlarge the bills it would go a long way.

The place where the items are? i don't think it's possible, howver you can change gui_size to something bigger, it should maybe work. Or maybe it only works for menu.

You might implement a workaround using image buttons. This would no longer be a real inventory but if I understand you right your student's task is to give money change.
Click on button: add this coin/bill to a bar at the bottom
Click on some button on that bar on the bottom: put money back.

[burli]

How can I get the version of the engine in Lua? I want to know if the engine is 0.4 or 0.5