Post your modding questions here

[Ferk]

I also have a question: how come there's a "minetest.dir_to_wallmounted" but not a "minetest.wallmounted_to_dir"?

I'm implementing some rotation logic and I need to be able to convert the values to vector, transform them and convert them back. I can do this with facedir nodes but not wallmounted.

EDIT: Not sure if there's some other way to convert wallmounted to dir right now, but I opened a pull request to add that function to the engine.

[eduardomezencio]

Maybe it would work to use minetest.setting_set (http://dev.minetest.net/minetest.setting_set).

I tested it, and it's not the solution. First problem is that it changes the user setting in his minetest.conf file, so it may cause problems with his other worlds. Second that just putting it in init.lua does not make the setting change before mapgen starts. Only after closing and opening the world again it starts to work.

[rubenwardy]

minetest.set_mapgen_params(MapgenParams) may be the solution

https://github.com/minetest/minetest/bl ... .txt#L2007

you can set seed, flags, water level and mgname.

[eduardomezencio]

minetest.set_mapgen_params(MapgenParams) may be the solution

https://github.com/minetest/minetest/bl ... .txt#L2007

you can set seed, flags, water level and mgname.

Thank you very much for your answer. This seems to be the solution, but the information in the wiki contradicts it. First, chunksize is not listed as a possible value for mapgen_params here: http://dev.minetest.net/minetest.set_mapgen_params

Second, this page http://dev.minetest.net/Mapgen_Parameters says the following about chunksize:

This parameter cannot be modified through the Lua API.

I'll test your suggestion. I hope it works, but then it will mean that the wiki definitely needs some fixing.

[eduardomezencio]

And it didn't work. You can get chunksize with get_mapgen_params() but you can't change it with set_mapgen_params().

[rubenwardy]

What does chunksize do?

[paramat]

Don't trust the wiki, it''s usually long out of date, go by the docs in the repo.
Setting chunksize needs to be added, fairly easy.
Chunksize is the edge length of a mapchunk (80^3 nodes by default) stated in mapblocks (16^3 nodes), default is 5.
Changing it affects cave, dungeon and maybe decoration density so extreme values give weird results.
5 is near-optimum, anything less might create chunk border glitches in mgv6 (which is why mgv6 terrain doesn't go above y = 47), mgv5/mgv7 are unaffected.

[Don]

If I wanted to do a block of code with register on die then where can I put it?
I want to make it so if a certain node is below when the player dies they spawn at a certain position.

I also need to know if there is a way to make a node not highlight when pointed at but still not let the player point through it. If I set pointable = false then the player can point through it. The same goes for if I set selecetion box to 0,0,0,0,0,0.
Thanks to anyone who can help.

[Hybrid Dog]

If I wanted to do a block of code with register on die then where can I put it?
I want to make it so if a certain node is below when the player dies they spawn at a certain position.

https://github.com/minetest/minetest/bl ... .txt#L1825
l guess this is easy. Put the code in init.lua, not in a function like the abm action.

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_on_dieplayer(function(player)
   local pos = vector.round(player:getpos())
   pos.y = pos.y-1
   if minetest.get_node(pos).name ~= […] then
      return
   end
   minetest.after(0, function(name)
      local player = minetest.get_player_by_name(name)
      if not player then
         return
      end
      player:moveto([…])
   end, player:get_player_name())
end)

[Don]

If I wanted to do a block of code with register on die then where can I put it?
I want to make it so if a certain node is below when the player dies they spawn at a certain position.

https://github.com/minetest/minetest/bl ... .txt#L1825
l guess this is easy. Put the code in init.lua, not in a function like the abm action.

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_on_dieplayer(function(player)
   local pos = vector.round(player:getpos())
   pos.y = pos.y-1
   if minetest.get_node(pos).name ~= […] then
      return
   end
   minetest.after(0, function(name)
      local player = minetest.get_player_by_name(name)
      if not player then
         return
      end
      player:moveto([…])
   end, player:get_player_name())
end)

Thank you.

[Don]

Using the above code I now move to the right location when I die but the respawn button comes up. When I hit respawn I get moved to the spawn location. Tha api says "return true in func to disable regular player placement". I tried that but nothing changed.
How do I disable the regular spawn position?

[Amaz]

I think that if you change that to register_on_respawnplayer it would work. (That's the one the api says "return true in func to disable regular player placement" about.)

[Don]

I think that if you change that to register_on_respawnplayer it would work. (That's the one the api says "return true in func to disable regular player placement" about.)

Thank you. It is working right now.

[Don]

New issue with this. When you die you are still active in the game until you hit the respawn button.
For example if you fall in lava you will continue to die over and over again until you hit respawn.
I want to get a death count but since you keep dying until you respawn I can not.

[Don]

Is there a way to get objects inside a defined area similar to get objects inside radius?

[eduardomezencio]

I also need to know if there is a way to make a node not highlight when pointed at but still not let the player point through it. If I set pointable = false then the player can point through it. The same goes for if I set selecetion box to 0,0,0,0,0,0.

I also wanted to know about this. And even another related thing: is there a way for a block to be pointable only when using a certain tool?

[minetestcr]

Hello. I created a new node, and now I'm trying to make stairs with this node. Can anyone help me with that? I was looking at the code here https://github.com/minetest/minetest_game/blob/master/mods/stairs/init.lua but I don't really understand it, so I don't know where to start....


this is the code of my node:

minetest.register_node ("stj:terrazo", {
drawtype = draw,
description = "terrazo del piso",
tile_images = {"terrazo.png"},
inventory_image = {"terrazo.png"},
sunlight_propagates = true,
paramtype = 'light',
walkable = true,
material = minetest.digprop_constanttime(1.0),
groups = {snappy=2,cracky=3,oddly_breakable_by_hand=3,},
})

minetest.register_craft({
output = '"stj:terrazo" 4',
recipe = {
{'group:sand', 'default:gravel', ''},
{'', '', ''},
{'', '', ''},
} })

[Krock]

<snip>

Use the function stairs.register_stair (or .register_slab) to register your node as a stair (or slab).
Here's how it could look like: (don't forget to add "default" and "stairs" to your depends.txt file)

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_node("stj:terrazo", {
   description = "terrazo del piso",
   tiles = {"terrazo.png"},
   inventory_image = {"terrazo.png"},
   sunlight_propagates = true,
   paramtype = "light",
   walkable = true,
   sounds = default.node_sound_stone_defaults(),
   groups = {snappy=2, cracky=3, oddly_breakable_by_hand=3},
})

minetest.register_craft({
   output = "stj:terrazo 4",
   recipe = {
      {"group:sand", "default:gravel", ""},
      {"", "", ""},
      {"", "", ""},
   }
})

stairs.register_ <stair / slab>(
   "terrazo",
   "stj:terrazo",
   {snappy=2, cracky=3, oddly_breakable_by_hand=3},
   {"terrazo.png"},
   "terrazo del piso <stair / slab>",
   default.node_sound_stone_defaults()
)

[minetestcr]

<snip>

Use the function stairs.register_stair (or .register_slab) to register your node as a stair (or slab).
Here's how it could look like: (don't forget to add "default" and "stairs" to your depends.txt file)

Thanks a lot Krock, that did it.

[Hybrid Dog]

Is there a way to get objects inside a defined area similar to get objects inside radius?

l'm not sure, but l think there's a table minetest.luaentities, which contains all active objects.
get objects inside radius tests for every active object if it's inside the sphere, it is not done in lua l think, so it works faster

[LionsDen]

I also wanted to know about this. And even another related thing: is there a way for a block to be pointable only when using a certain tool?

Try looking at the code for the default bucket. That allows water and lava to be pointable when they normally aren't. Hope this helps you.

[Hybrid Dog]

Try looking at the code for the default bucket. That allows water and lava to be pointable when they normally aren't. Hope this helps you.

l don't believe you, you can place water on nodes by pointing them with the water bucket and right clicking.

[Ferk]

l don't believe you, you can place water on nodes by pointing them with the water bucket and right clicking.

He is right, the bucket is one of the items that has the flag that allows pointing liquids enabled. If you point to a liquid with other items you don't see a selection box around the water node you are pointing to (that's what eduardomezencio wants, nodes that are only pointable with a certain tool).

However, it's only a boolean flag specific for liquids, and the behavior is probably implemented in the engine. I don't think that's gonna be useful for him unless he changes the engine, since I guess his node is not a liquid.

Thought maybe there's a chance the feature is done in the lua api level of the engine, so he could have a look at it.. but I doubt it. Liquids are very particular and probably there's a lot of hardcoded stuff around them for the sake of efficiency.

[Hybrid Dog]

Thought maybe there's a chance the feature is done in the lua api level of the engine, so he could have a look at it.. but I doubt it. Liquids are very particular and probably there's a lot of hardcoded stuff around them for the sake of efficiency.

l guess you could do it similar to the way it's done for the sounds:
e.g. add a group cracky_pointable = 0 to the tool which makes the cracky group (stone, cobble, etc) not be pointable by it

To completely disallow pointing with a tool, just set it's range to 0.
https://github.com/HybridDog/nuke/blob/ ... t.lua#L740

[Don]

Thought maybe there's a chance the feature is done in the lua api level of the engine, so he could have a look at it.. but I doubt it. Liquids are very particular and probably there's a lot of hardcoded stuff around them for the sake of efficiency.

l guess you could do it similar to the way it's done for the sounds:
e.g. add a group cracky_pointable = 0 to the tool which makes the cracky group (stone, cobble, etc) not be pointable by it

To disallow pointing with a tool, just set it's range to 0.

That would work for a tool to be able to point at something. I would like a way to make a node not pointable but still not allow the player to point past the node.
I have suggested that there be an option to make the selection box transparent. This would make it so you can have windows that are pointable but you do not get the selection box. I think it would make them look much better.

[Hybrid Dog]

Thought maybe there's a chance the feature is done in the lua api level of the engine, so he could have a look at it.. but I doubt it. Liquids are very particular and probably there's a lot of hardcoded stuff around them for the sake of efficiency.

l guess you could do it similar to the way it's done for the sounds:
e.g. add a group cracky_pointable = 0 to the tool which makes the cracky group (stone, cobble, etc) not be pointable by it

To disallow pointing with a tool, just set it's range to 0.

That would work for a tool to be able to point at something. I would like a way to make a node not pointable but still not allow the player to point past the node.
I have suggested that there be an option to make the selection box transparent. This would make it so you can have windows that are pointable but you do not get the selection box. I think it would make them look much better.

you could change a little bit the source code that it's not shown on nodes with glasslike and framed glasslike

How about hiding the selection box if you're wielding an implacable item which can't dig the pointed node? (e.g. pointing mese with a wood pick would not show it)

[Don]

How about hiding the selection box if you're wielding an implacable item which can't dig the pointed node? (e.g. pointing mese with a wood pick would not show it)

I have no idea how that would be done. I will have to dig into the code for them.

Edit - I just tried it and the selection box shows on mese if holding wood pick.

[Hybrid Dog]

l mean implementing it in source code

[Don]

When a node has a formspec in it's metadata you right click to show the form. Is there a way of disabling this so I can use on_rightclick? I want to be able to do something before it shows the formspec.

[thisrandomer]

What does it mean when you try to run a mod and it says ServerError: LuaError: error: C:/Minetest\bin\..\mods\mobs/api.lua:1209: attempts to call field 'is_protected' (a nil value) ?