Post your modding questions here

[CWz]

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_chatcommand("send_spawn", {
   params = "",
   description = "Send interactless players back to spawn.",
   privs = {basic_privs=true},
   func = function(name)
      for _,player in ipairs(minetest.get_connected_players()) do
         local player = player:get_player_name()
         local pos = minetest.setting_get_pos("static_spawnpoint")
         if not minetest.get_player_privs(player).interact then
            player:setpos(pos)
            minetest.chat_send_player(player,"Please read the rules.")
            return
         end
      end
      minetest.log("action", "player " .. name .. " Used the send_spawn command.")
   end,
})

2015-07-03 10:39:05: ERROR[main]: UNRECOVERABLE error occurred. Stopping server. Please fix the following error:
2015-07-03 10:39:05: ERROR[main]: ...ocuments/minetest/bin/../mods/keyword_interact2/init.lua:67: attempt to call method 'setpos' (a nil value)
2015-07-03 10:39:05: ERROR[main]: stack traceback:
2015-07-03 10:39:05: ERROR[main]: ...ocuments/minetest/bin/../mods/keyword_interact2/init.lua:67: in function 'func'
2015-07-03 10:39:05: ERROR[main]: .../Documents/minetest/bin/../builtin/game/chatcommands.lua:40: in function <.../Documents/minetest/bin/../builtin/game/chatcommands.lua:29>
2015-07-03 10:39:05: ERROR[main]: ...ormz/Documents/minetest/bin/../builtin/game/register.lua:341: in function <...ormz/Documents/minetest/bin/../builtin/game/register.lua:329>

I am kind of confused to what is wrong with code

[rubenwardy]

As the error message says, the function setpos does not exist. Are you sure it's not set_pos
?

Edit: you overwrite the player variable the player's name, and then try to access the player object again. Change local player to local name, and the player in get player price to name.

[matyilona]

What mod is the simplest/easiest to understand example of inplementing entities? Is there some kind of tutorial on it?

[Hybrid Dog]

What mod is the simplest/easiest to understand example of inplementing entities? Is there some kind of tutorial on it?

maybe that mod which adds an earthball, iceball and lightning sword, the balls are entities l think
the nuke mod also uses entities

[Uruwi]

How do I specify that more than one of the same block must be adjacent in an ABM?
I am trying to create a block that detects four meses around it.

[prestidigitator]

How do I specify that more than one of the same block must be adjacent in an ABM?
I am trying to create a block that detects four meses around it.

I don't think you can. So specify that it must have at least one neighbor (as usual), and then in the actual ABM function test for your additional condition.

[Uruwi]

How do I specify that more than one of the same block must be adjacent in an ABM?
I am trying to create a block that detects four meses around it.

I don't think you can. So specify that it must have at least one neighbor (as usual), and then in the actual ABM function test for your additional condition.

Well, thank you.

How do you perform an action to a node only when there is an adjacent update?

Edit: and is there a way to change a node's appearance on the fly?

[matyilona]

What mod is the simplest/easiest to understand example of inplementing entities? Is there some kind of tutorial on it?

maybe that mod which adds an earthball, iceball and lightning sword, the balls are entities l think
the nuke mod also uses entities

What is the actual name of the mod? Searching for earthball or lightning sword only gets me back here.

[DanteLives]

Is there a way to test whether a neighbouring node is a member of a particular group? I know how to test the name of the node, but not the groups.

[Uruwi]

Is there a way to test whether a neighbouring node is a member of a particular group? I know how to test the name of the node, but not the groups.

minetest.get_item_group(item_name, group_name) returns the group value.

[prestidigitator]

How do you perform an action to a node only when there is an adjacent update?

I guess it kind of depends on what you mean by, "an adjacent update." If you mean when anything adjacent changes, it may not be possible (or practical). You might be able to do something limited with minetest.register_on_dignode() and/or minetest.register_on_placenode(), or you might have to use some kind of timer (and possibly metadata to remember previous state?). There may be more tenable options if you only need, for example, to deal with updates of neighboring nodes of the same type or other types your mod provides. That's because you have more control of the callbacks of those adjacent nodes and can use them to wander around to neighbors and see what might need to be done.

and is there a way to change a node's appearance on the fly?

Again, in a limited sense. Node metadata (except for hovertext) doesn't change how a node appears. Other than that, there are three things stored for each voxel: node type "name", "param1", and "param2". Some kinds of nodes use the two parameter values to change how the node looks (e.g. this is how stairs can have different orientations). If the changes in appearance you are going for do not fit into the limited options built into the engine, you may just have to register a different type of node for every possible different "appearance" you want it to have.

Entities are another possible solution/hack. They are a bit more dynamic than nodes, and can potentially be used to enhance nodes' appearance. I believe various mods that provide things like "picture frames" use entities in this way.

[prestidigitator]

Is there a way to test whether a neighbouring node is a member of a particular group? I know how to test the name of the node, but not the groups.

minetest.get_item_group(item_name, group_name) returns the group value.

You can also get the node definition from the "minetest.regietered_nodes" table, keyed by node name. It holds basically the same table given to minetest.register_node(). It might also have some default properties added to it that weren't in the original registration call (can't remember, and probably not wise to depend on either possible behavior anyway).

[Uruwi]

Again, in a limited sense. Node metadata (except for hovertext) doesn't change how a node appears. Other than that, there are three things stored for each voxel: node type "name", "param1", and "param2". Some kinds of nodes use the two parameter values to change how the node looks (e.g. this is how stairs can have different orientations). If the changes in appearance you are going for do not fit into the limited options built into the engine, you may just have to register a different type of node for every possible different "appearance" you want it to have.

Entities are another possible solution/hack. They are a bit more dynamic than nodes, and can potentially be used to enhance nodes' appearance. I believe various mods that provide things like "picture frames" use entities in this way.

The problem is that in some cases there are 256 block states. I'll just have to wait until there's an API for doing what I want.

Edit: and for the block update detection, I'm fine with detecting those from my mod's nodes.

[Hybrid Dog]

What mod is the simplest/easiest to understand example of inplementing entities? Is there some kind of tutorial on it?

maybe that mod which adds an earthball, iceball and lightning sword, the balls are entities l think
the nuke mod also uses entities

What is the actual name of the mod? Searching for earthball or lightning sword only gets me back here.

fireballs viewtopic.php?id=6154

[mrf]

(it's confusing that this subtopic exists in the "Modding Discussion" board with 81 pages of the same thread but I think this is the place I'm supposed to ask this, so...)
I have an airborne object (LuaEntitySAO) that is supposed to look down at the player on the ground, and while I can set the direction correctly across the horizontal plane, there doesn't seem to be any "setpitch" for setting the direction of the entity on the vertical plane. Is there any way currently to achieve this?
(It looks like the issue has been filed on github, https://github.com/minetest/minetest/issues/2251)

(edit: er, by "direction" ... "across the horizontal plane", I mean yaw.)

[kaeza]

Indeed, there's no `setpitch` (or `setroll` either). It could be done by creating a 3D model of the object in question and using `LuaEntity:set_bone_position("root bone", ...)` (don't mind the function name; it also does rotations). Note that I didn't test whether this works or not. Of course, the proper solution is to implement `setpitch` and `setroll` properly.

[mrf]

Kaeza, thanks for the response. I'll take a look at your suggestions as well as looking at the source to see if I can patch in pitch and roll.

[Nathan.S]

Maybe I'm just crazy, and am remembering something from when I played minecraft, but wasn't there a mod for minetest that made food spoil if it wasn't cooked or refrigerated? I've tried searching the forums, and even did a Google search but have found nothing. Any help would be appreciated.

[TeTpaAka]

My problem is, that the engine complains about deprecated usage:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

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Deprecated usage of statbar without size!


According to lua_api.txt, the size is:

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* `size`: If used, will force full-image size to this value (override texture pack image size)


But setting the size to the dimensions of the image also affects the position of the statbar. The problem is, that the statbar fits exactly in a background image. At least, that is in the deprecated behaviour. What should I do to have the same result with the current engine?

[Rui]

[DELETED]

[Hybrid Dog]

How I create block preview image?

This like.

http://dev.minetest.net/minetest.inventorycube#Example

[Rui]

[DELETED]

[Calinou]

@Hybrid Dog
How save it as png image?

Get Blender and open this .blend file using it.

Set texture paths appropriately, then press F12 to make a Blender render, then F3 to export it to PNG format.

[Rui]

[DELETED]

[Calinou]

@Calinou
Thanks.
But, my pc has low performance...

Is there such thing as a shell script (.sh)?

The rendering of the cube takes about 0.10 seconds here. Even if your computer was 10 times as slow as mine, it would take only 1 second to render it.

There is no Shell script for making renders. Blender is more suited for this purpose.

[Hybrid Dog]

There is no Shell script for making renders. Blender is more suited for this purpose.

but Zeg9's skins mod uses a shell script which makes blender render images and save them
https://github.com/Zeg9/minetest-skins/ ... reviews.sh

[bobomb]

formspec issue

I have a few "popup" forms that open from a main form, but the popups only show once in a dozen clicks. the exit button on these popup forms should reopen the main form, this rarely happens. If I dump a table to print(), all these form flows work perfectly. what is up with that!?

the code, working is at https://github.com/bobombolo/automata/blob/development/init.lua#L780 which shows the line where the print(dump()) statement is. it would sure be nice not to have to do that statement.

any ideas what is causing this issue? is it a question of things happening too quickly? simply printing "here" doesn't solve the issue.
update: actually even with that dump it is still about once in 6 that it works ...
if I dump another table a few lines above then everything works...

[Anonymous_moose]

I am trying to make a wearable spacesuit that works with 3darmor and moontest. I have figured out how to get the breath to restore, but only cannot find out how to get the game to know if the space suit is being worn. any help would be much appreciated.

[Hybrid Dog]

formspec issue

I have a few "popup" forms that open from a main form, but the popups only show once in a dozen clicks. the exit button on these popup forms should reopen the main form, this rarely happens. If I dump a table to print(), all these form flows work perfectly. what is up with that!?

the code, working is at https://github.com/bobombolo/automata/blob/development/init.lua#L780 which shows the line where the print(dump()) statement is. it would sure be nice not to have to do that statement.

any ideas what is causing this issue? is it a question of things happening too quickly? simply printing "here" doesn't solve the issue.
update: actually even with that dump it is still about once in 6 that it works ...
if I dump another table a few lines above then everything works...

maybe using minetest.after(0, […] could work

[Hybrid Dog]

I am trying to make a wearable spacesuit that works with 3darmor and moontest. I have figured out how to get the breath to restore, but only cannot find out how to get the game to know if the space suit is being worn. any help would be much appreciated.

l guess you would need to search in the armour inventory slots.