Post your modding questions here

[Byakuren]

Is here something like on_collide for entities ?

No

[stu]

Is here something like on_collide for entities ?

No

While there are no direct collision callbacks there are ways you can crudely implement collision detection. How you do that depends on what collisions you want to detect. Is it nodes, other entities or just the fact that you collided at all?

[nomohakon]

How to make schematic and how to use singlenode mapgen? Im trying to make underground version of skyblock game, and i need to know if its even posible (full map of stone, some ores, some generated structures, player spawning, etc.).

[sofar]

How to make schematic and how to use singlenode mapgen? Im trying to make underground version of skyblock game, and i need to know if its even posible (full map of stone, some ores, some generated structures, player spawning, etc.).

You can look at this project to see how to make them from lua (and then save as .mts).

https://github.com/minetest-mods/saveschems

Worldedit can also save them, but it's harder to set probability factors that way.

[Nyarg]

...crudely implement collision detection.

Yeah ) I am looking trough *.lua in Minetest folder and understand that collision detecting makes directly via simple alhoritm like detect nearby laying nodes. (for examples [funCaves], [throwing], rain and snow in some mods)

It looks sadly when my future mod like airship with face over >1000 blocks navigates trought difficult path geometry with epic multiple collision and partially destroying self structure on it.

Is it nodes, other entities or just the fact that you collided at all?

Entities with nodes and other entities.

[Nyarg]

Ooops. I'm found something sad.

3 entity was create and attached as chain or star.
Both experiment given same behaviour.

Only first entity (root) have collision with world and me.
Other two only with me but world.

Is it right or I'm doing something wrong ?

shoot

+ Spoiler

code

+ Spoiler

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Code: Select all

local modName = minetest.get_current_modname()
local modPath = minetest.get_modpath( minetest.get_current_modname())

local eObj = {      
   physical = true,
   collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
   visual = "cube",

}

function eObj:on_activate( staticdata)
      self.object:setvelocity({x=0.12, y=0, z=0})
end

minetest.register_entity( modName .. ":eProto", eObj )   
minetest.register_entity( modName .. ":eProto1", eObj )

minetest.register_on_punchnode( function( pos, node, puncher, pointed_thing)   
   local a=minetest.add_entity( {x=pos.x,y=pos.y+1,z=pos.z}, modName .. ":eProto")   
---   local b=minetest.add_entity( {x=pos.x,y=pos.y+2,z=pos.z}, modName .. ":eProto1")
   local b=minetest.add_entity( {x=pos.x,y=pos.y+2,z=pos.z}, modName .. ":eProto")   
   local c=minetest.add_entity( {x=pos.x,y=pos.y+2,z=pos.z}, modName .. ":eProto")   
   b:set_attach( a, "", {  x=10, y=20, z=0},   {x=0, y=0, z=0})
---   c:set_attach( b, "", {  x=10, y=20, z=0},   {x=0, y=0, z=0})    
   c:set_attach( a, "", {  x=10, y=20, z=0},   {x=0, y=0, z=0})
end )


[Damien]

Hey chaps!
I was wondering : can one make voxel models and use them for entities here on Minetest?
And if so,may I also ask how many voxels would a minetest node be wide?
Thank you for your patience.

[oscar14]

A bronze pick have a max_drop_level=1, and a obsidian brick is a node level = 2.

I shouldn't be able to get any drop digging a obsidian brick with a bronze pick, but I do. Is just me or there is something I'm misunderstanding?

[D00Med]

max_drop_level is something else, it is "maxlevel" in "groupcaps" that defines what the tool can dig.

[oscar14]

What is the max_drop_level then?

I want certain node to be digable whit all tools but not drop his item always, only with an specific tool.

[D00Med]

Maybe the size of the stack that can be dropped?
Then you need to put this in the node definition:
" drop = "", "
That will make it drop nothing, then you need to add a function for "on_destruct"
There might be a better way to do it.

[oscar14]

Yeah, that would work. If I don't find any other option I think I'll go that way.

[Pyros]

Hello,

I would like to know the code for making an entity spawn another entity, such as a fighter jet firing a missile.
I would also like to do this without the use of any APIs such as vehicle_ mash, not that I have anything against them.
Is this possible?

[D00Med]

Using this will make an entity spawn:
local name = minetest.env:add_entity(pos, "entity_name")
If you want it to be spawned by another entity, then put that somewhere in the entity's "on_step" function, with a trigger of some sort to make it happen at the right time :)

[orwell]

local name = minetest.env:add_entity(pos, "entity_name")

minetest.env is deprecated. Use this instead:

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local object = minetest.add_entity(pos, "entity_name")

it returns the ObjectRef (what that is see lua_api.txt) of the new entity or nil if it cannot be spawned.

[Robsoie]

On an old thread i asked on how to make those forests/jungle less dense (as i never had any fun with how they are set up) :
viewtopic.php?f=47&t=14545

And it worked great and can be tweaked a lot , by example on a v7 that usually generate very dense forests on my world i could obtain this with lower offset and scale for the tree decorations :
http://i.imgur.com/qcAcvQz.jpg

Now what i would like to try is to make biome smallers so instead of sometime being randomly and boringly near endless area of snow or grass, when exploring i would want to often move between visually different biomes .

Now looking at the biome definition, by example the snowy grassland one :
minetest.register_biome({
name = "snowy_grassland",
node_dust = "default:snow",
node_top = "default:dirt_with_snow",
depth_top = 1,
node_filler = "default:dirt",
depth_filler = 1,
--node_stone = "",
--node_water_top = "",
--depth_water_top = ,
--node_water = "",
--node_river_water = "",
node_riverbed = "default:sand",
depth_riverbed = 2,
y_min = 5,
y_max = 31000,
heat_point = 20,
humidity_point = 35,

I don't seem to find anything controlling the actual size of this one as searching the board about what does those parameters mean (as there's no documentation about this) , they don't seem related to the actual biome size

And ther's this :
viewtopic.php?f=47&t=11603

They need to be evenly spaced out on a graph of heat agaiinst humidity for roughly equal size biomes, but even then because of the nature of perlin noise biomes will vary in size and sometimes be rare or huge.

So is it really impossible to limit biome sizes ?

[orwell]

No. There was something about noise params. I think this question was asked and answered somewhere.

In minetest.conf:

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mg_biome_np_heat = 50, 50, (n, n, n), 5349, 3, 0.5, 2.0
mg_biome_np_humidity = 50, 50, (n, n, n), 842, 3, 0.5, 2.0

the value 'n' is default 600 (or so), set it to the diameter that biomes should have (roughly).
this changes the perlin noise maps to be more dense.

[Robsoie]

Thank you very much, time for experimenting :)

edit : looks like it's working
http://i.imgur.com/oyj49n1.jpg
going to have fun testing around the values

[TumeniNodes]

It might be worth looking over this section https://forum.minetest.net/viewtopic.php?f=47&t=15272, and even posting questions there it would keep any mapgen items in one place, which makes it far more helpful to others being in one section

[DS-minetest]

is there a way to give two or more different textures to an entities with mesh at once, some sides the one texture, some the other one?

[sofar]

is there a way to give two or more different textures to an entities with mesh at once, some sides the one texture, some the other one?

yes, as long as the model has the proper 2 materials defined. Use `textures = { texture1, texture2},` (off the top of my head)

[ExeterDad]

is there a way to give two or more different textures to an entities with mesh at once, some sides the one texture, some the other one?

yes, as long as the model has the proper 2 materials defined. Use `textures = { texture1, texture2},` (off the top of my head)

That is correct

I would guess most models used in Minetest (think mobs) only contain one material though. A work around could be to overlay another texture to add something. For example if you wanted to give Sam a black eye, you would assign character.png^black_eye.png

The black eye texture would be exactly the same size as character.png. It would be transparent with a black eye drawn where Sams eye would be.

[Napiophelios]

When using drawtype = "plantlike",
I use paramtype2 = "meshoptions",
then add place_param2 = 1,

but nothing is different, it looks the same as normal plantlike draw type.
what am I doing wrong?


EDIT:
AH. never mind. Figured out the problem :)

[D00Med]

paramtype2 should stay as "plantlike", and I think place_param2 = 1 will result in a normal plantlike node anyway(maybe not), try it with 3 or 4 to test.

[Napiophelios]

paramtype2 should stay as "plantlike", and I think place_param2 = 1 will result in a normal plantlike node anyway(maybe not), try it with 3 or 4 to test.

normal is an "x" pattern,
I wanted a "+" pattern.

It works, it just didn't seem to work with minetest.add_node
works fine with minetest.place_node
go figure right

[D00Med]

Oh ok, you are right, 1 is that shape.
It will work with: minetest.set_node(pos, {name="blah:blah", param2=1})
And I think there's a way to set it when a node is placed as a simple mapgen decoration.

[D00Med]

Is there a way to check if the view is 3rd or 1st person?

[sofar]

it just didn't seem to work with minetest.add_node
works fine with minetest.place_node

add_node ignores any placement defaults, so you have to do

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minetest.add_node(pos, {name = "plant:name", param2 = 1})

instead.

[ManElevation]

can some one write a block lua script. just a plain block
with a {"front.png"} a {"side.png"} and a {"top.png"} {"back.png"}

a full one please

[orwell]

Is there a way to check if the view is 3rd or 1st person?

That is not sent to the server, so no. Not possible without network protocol changes