Post your modding questions here

[Nubm]

I moved the last brdige node to the front and it worked. However, the selction box seems not to adjust. I set it from -,5 to 3.5 in lenght to -1.5 to 2.5, but it still shows the old selection.
Also, i've split the bridge into multiple nodes that can be placed seperately (image attached). One advantage is that the nodes can be placed in two directions, resulting in even more variations on longer bridges.
However, its pretty confusing since the bridge parts look very similar. I could add a number to the inventory image, but i rather have a single block (or tool maybe) that will place one of the nodes at random, and returns the block back to one node if digged. Is it even possible? Its fairly simple with images (for example grass uses this) but can i do it somehow with nodebox blocks?

[srifqi]

However, its pretty confusing since the bridge parts look very similar. I could add a number to the inventory image, but i rather have a single block (or tool maybe) that will place one of the nodes at random, and returns the block back to one node if digged. Is it even possible? Its fairly simple with images (for example grass uses this) but can i do it somehow with nodebox blocks?

What you need is on_place function and drop value (for example: grass)

[Nubm]

Wow, that was easy. Thank you so very very much!
Works perfect. :)

[srifqi]

Wow, that was easy. Thank you so very very much!
Works perfect. :)

You are welcome. Do not be shy to ask! Happy play - ehm - modding!

[Nubm]

Well, there is one question to finalize my plank bridge: Can i rotate the placed tile at random (coin flip) on the z axis? This would double the variations. Not that i really need those since the planks look pretty similar, but i have some more ideas how to put that to use. :)
However, im not sure if it is possible to rotate tiles like that on place.

Also, just as an idea, could i create a block that randomly selects one of five nodes (like the bridge parts) and selects a random texture out of five as well? That should result in 25 unique blocks out of 5 registered nodes and 5 textures, does it? That could be great for objects like stones or maybe bushes or other plants.

[srifqi]

Well, there is one question to finalize my plank bridge: Can i rotate the placed tile at random (coin flip) on the z axis? This would double the variations. Not that i really need those since the planks look pretty similar, but i have some more ideas how to put that to use. :)
However, im not sure if it is possible to rotate tiles like that on place.

To do coin flip you must register another node with flipped nodeboxes (as you mention before). Because if you only do coin flip, the bridge will be floating above the block below.

Also, just as an idea, could i create a block that randomly selects one of five nodes (like the bridge parts) and selects a random texture out of five as well? That should result in 25 unique blocks out of 5 registered nodes and 5 textures, does it? That could be great for objects like stones or maybe bushes or other plants.

Nice idea! You may register more node ("b:ridge_1_1","b:ridge_1_2").

[Nubm]

To do coin flip you must register another node with flipped nodeboxes (as you mention before). Because if you only do coin flip, the bridge will be floating above the block below.

Sorry, my bad. English isn't my native language. I meant coin flip as a chance (50%), not to flip the nodes like a coin. :p
For example, the bridge parts will all face in the same direction if i place them while walking backwards. If some of them could be facing randomly in the direction of the player instead, it would somewhat look like as if there are 10 different types of bridge parts. Would be most noticable on the one part that has a missing plank.

Nice idea! You may register more node ("b:ridge_1_1","b:ridge_1_2").

That looks like an array, didn't know it is possible so easy. Thats not what i had in mind, but very useful to know. I have to do some research how to build multiple nodes at once and link them together, an array with random tile or texture selection could also be pretty useful. Or maybe it can be used to store complete objects like houses that can be placed and randomized on certain dimensions.Thanks for the input! :)

[LionsDen]

Unless there have been engine changes, when you register a node you have to tell it what texture(s) are being used. There is currently no way to change those textures afterwards. You are unfortunately limited to whatever node you register. So if you want 25 different textured nodes, you have to register 25 nodes. The only possible difference I have heard of is the colorization ability which can change the colors (I think). I haven't played with that but I think there are a few mods out there that do and you could possibly find and learn about from them.

[Sokomine]

Well, there is one question to finalize my plank bridge: Can i rotate the placed tile at random (coin flip) on the z axis? This would double the variations. Not that i really need those since the planks look pretty similar, but i have some more ideas how to put that to use. :)
However, im not sure if it is possible to rotate tiles like that on place.

The way your bridge looks, you could rotate some parts randomly by 180 degrees if that's what you've got in mind. That would require a diffrent param2. Other than that, if you want a diffrent texture, you need to register a new node.

Maybe you'll also be intrested in my bridges and handrail mod. It has a self-building bridge.

I'm looking forward to see your mod released.

[prestidigitator]

Unless there have been engine changes, when you register a node you have to tell it what texture(s) are being used. There is currently no way to change those textures afterwards. You are unfortunately limited to whatever node you register. So if you want 25 different textured nodes, you have to register 25 nodes. The only possible difference I have heard of is the colorization ability which can change the colors (I think). I haven't played with that but I think there are a few mods out there that do and you could possibly find and learn about from them.

Different colors can use a texture specification to share the same base texture image (e.g. file name), but they are still different textures and must be applied to different registered nodes. It's commonly done in a loop with a template pattern for the name (e.g. "mymod:thing_red", "mymod:thing_blue", etc.).

[Nubm]

Unless there have been engine changes, when you register a node you have to tell it what texture(s) are being used. There is currently no way to change those textures afterwards. You are unfortunately limited to whatever node you register. So if you want 25 different textured nodes, you have to register 25 nodes. The only possible difference I have heard of is the colorization ability which can change the colors (I think). I haven't played with that but I think there are a few mods out there that do and you could possibly find and learn about from them.

Well, im a Newb. Its sometimes (pretty often) hard to understand whats possible and whats not. Was just an idea with the different textures, too bad that it can't be done without additional node registrations.
However, i just red the ToDo list posted in the L-Shape tree list, which includes a possible color value for param2. That would be great for different kind of similar materials, like stones and wood. I'll try to check some mobs for that color thing. :)

Well, there is one question to finalize my plank bridge: Can i rotate the placed tile at random (coin flip) on the z axis? This would double the variations. Not that i really need those since the planks look pretty similar, but i have some more ideas how to put that to use. :)
However, im not sure if it is possible to rotate tiles like that on place.

The way your bridge looks, you could rotate some parts randomly by 180 degrees if that's what you've got in mind. That would require a diffrent param2. Other than that, if you want a diffrent texture, you need to register a new node.

Maybe you'll also be intrested in my bridges and handrail mod. It has a self-building bridge.

I'm looking forward to see your mod released.

Thanks a lot, i will take a closer look into the param2 settings. I've seen your bridge mod, was suggested above somewhere. I do not have it installed yet, but i will take a peek in your code. :)
My bridge wasn't made for bridges though but for place random tiles and add variations. Its a plank mod for learning and testing purposes, and i doubt that much people would be interessted in it. Also i will probably simplify the planks anyways, but i've learned a lot by just modding around.

Different colors can use a texture specification to share the same base texture image (e.g. file name), but they are still different textures and must be applied to different registered nodes. It's commonly done in a loop with a template pattern for the name (e.g. "mymod:thing_red", "mymod:thing_blue", etc.).

Thank you, i will take a look in that. Overlays would provide as much variations as well, for example some random dirt or fake geometry. Isn't it how dirt with grass is done? Also i think plantlib uses that to add leaves under trees.

I have some more questions:
- How do fences work?
- I made some nodes that have values greater than .5 in the nodeboxes. For example, a stair that is 2 nodes long and a wall that has a little support plank to fit on the stillages. It works (boxes greater than 3 nodes away won't have collision it seems), but it is recommended? Also, is it possible to check for the node i place them on, so it can only be placed on objects from - for example - a specific mod?

[prestidigitator]

- How do fences work?
- I made some nodes that have values greater than .5 in the nodeboxes. For example, a stair that is 2 nodes long and a wall that has a little support plank to fit on the stillages. It works (boxes greater than 3 nodes away won't have collision it seems), but it is recommended? Also, is it possible to check for the node i place them on, so it can only be placed on objects from - for example - a specific mod?

• Fences have a special draw type. I haven't looked into it yet myself, but for examples you can look at the mods in the default game and I think in the Home Decor modpack for examples (IIRC there are more fences and some iron bars and stuff that act like the default fences).
• I believe nodes larger than the usual 1x1x1 node box are becoming more acceptable, especially since nodes with a mesh draw type have been added (this was very recent). The kinks might still be being worked out. Not sure.
• You can certainly check nodes under or generally around a node that's been placed. Use the node's on_place() callback to test nodes in close-by locations using minetest.get_node(), minetest.find_node_near() or minetest.find_nodes_in_area(). If you want to do something no matter how the node is created (e.g. created by a mod rather than a player placing it) you can use the on_construct() callback instead.

[Nathan.S]

I have a tool that places a node, a marker and an arrow, however I want the arrow to point in the direction that the user is pointing when they use the tool. I have the node set so if you place it directly all works as it should, but when using it as a tool it doesn't. Is this possible, am I just missing something really obvious?

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Code: Select all

if pointed_thing.type ==  'node' then
     minetest.set_node(pointed_thing.above, (name = 'more_fire:marking'})


[Don]

I have a tool that places a node, a marker and an arrow, however I want the arrow to point in the direction that the user is pointing when they use the tool. I have the node set so if you place it directly all works as it should, but when using it as a tool it doesn't. Is this possible, am I just missing something really obvious?

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 pointed_thing.type ==  'node' then
     minetest.set_node(pointed_thing.above, (name = 'more_fire:marking'})


Funny you ask that. I was trying to figure out how to convert look dir to a param2.

Can someone give an explanation of what get look dir returns?

[TeTpaAka]

I have a tool that places a node, a marker and an arrow, however I want the arrow to point in the direction that the user is pointing when they use the tool. I have the node set so if you place it directly all works as it should, but when using it as a tool it doesn't. Is this possible, am I just missing something really obvious?

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 pointed_thing.type ==  'node' then
     minetest.set_node(pointed_thing.above, (name = 'more_fire:marking'})


Funny you ask that. I was trying to figure out how to convert look dir to a param2.

Can someone give an explanation of what get look dir returns?

https://github.com/minetest/minetest/bl ... i.txt#L526
https://github.com/minetest/minetest/bl ... i.txt#L526
I hope, this helps.

@Nathan.S:
In your code, there is a false bracket (. To set the facedir, you would also need to specify it as param2.

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Code: Select all

if pointed_thing.type ==  'node' then
     minetest.set_node(pointed_thing.above, {name = 'more_fire:marking', param2=minetest.dir_to_facedir(player:get_look_dir())})


[Rui]

[DELETED]

[prestidigitator]

What minutes one day in the game?

The default is 20 minutes, but generally it is:

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Code: Select all

local time_speed = tonumber(minetest.setting_get("time_speed")) or 72;
local minutes_per_day = 24 * 60 / time_speed;


[Rui]

[DELETED]

[Nathan.S]

Thank you TeTpaAka, its working now as it should.

[maikerumine]

Quick question about changing nodes with a mod...

What is the best way to change nodes on event?
Currently I am using register abm and light value to change nodes, it works and all but I think u am asking for way too much CPU power and lag.

Is there an efficient way to change nodes?

Any help would be greatly appreciated.

[prestidigitator]

Quick question about changing nodes with a mod...

What is the best way to change nodes on event?
Currently I am using register abm and light value to change nodes, it works and all but I think u am asking for way too much CPU power and lag.

Is there an efficient way to change nodes?

It depends on the context. If you want to change each node after a particular amount of time has elapsed, then an ABM or node timer is probably what you want. If you want to do a bunch of them all at once, you probably want to use a VoxelManip. If you want to do it in other circumstances, there are all kinds of global, node-specific, or tool specific callbacks, and there's always minetest.after() if you know exactly what you want to do but don't want to do it immediately.

[ABJ]

How do I attach a node to an entity?
And I would like to know how to make an entity explode when an event occurs.

[DanteLives]

topic: How do I have the nodes checked above and below the node that the player places and then change those nodes depending on their identities? In other words, the mod consists of one block. If that block is placed either above or below a previously placed block of that type then the mod will change that node and the neighboring node into another type.

[prestidigitator]

How do I attach a node to an entity?
And I would like to know how to make an entity explode when an event occurs.

I believe entities can be attached to entities, but not nodes to entities. You'd have to create an entity that looks like the node. As for explosions, you really have to define what you mean by, "explosion." Does it do damage to entities/players? Destroy/transform nodes? Knock back entities/players? Have a particle effect? Emit a sound? You'll just want to implement each effect you want to include.

[prestidigitator]

topic: How do I have the nodes checked above and below the node that the player places and then change those nodes depending on their identities? In other words, the mod consists of one block. If that block is placed either above or below a previously placed block of that type then the mod will change that node and the neighboring node into another type.

Probably something like:

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Code: Select all

minetest.register_node(...
   {
      ...
      after_place_node = function(pos, placer, itemStack, pointedThing)
         local topPos    = { x = pos.x, y = pos.y + 1, z = pos.z };
         local bottomPos = { x = pos.x, y = pos.y + 1, z = pos.z };
         if minetest.get_node(topPos).name == ... then
            ...
            minetest.set_node(topPos, { name = ... });
            ...
         end
         if minetest.get_node(bottomPos).name == ... then
            ...
            minetest.set_node(bottomPos, { name = ... });
            ...
         end
      end,
      ...
   };


There are plenty of other possibilities, like testing for nodes' groups and stuff like that, or the properties in the nodes' definitions by looking at the minetest.registered_nodes table.

[Oussamarer]

hey guys i got a question
i need to know how to make a spawner for a monster that i got in my mod , a block that spawns monsters

another question please , how do i make chests with loot spawn in the dungeon

[ABJ]

Can anyone explain to me how to use minetest.add_particlespawner? I want to know more about it bc I'm making a mod with explosions.

[TenPlus1]

This example is from my Mobs Redo mod and adds a handy function which creates a particle spawner with your own textures...

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Code: Select all

function effect(pos, amount, texture, max_size)
    minetest.add_particlespawner({
        amount = amount, -- how many particles do you want
        time = 0.25, -- spawner stops after this time (use 0 for infinite)
        minpos = {x=pos.x-2, y=pos.y-2, z=pos.z-2}, -- minimum offset
        maxpos = {x=pos.x+2, y=pos.y+2, z=pos.z+2}, -- maximum offset
        minvel = {x=-2, y=-2, z=-2}, -- minimum velocity
        maxvel = {x=2,  y=2,  z=2}, -- maximum velocity
        minacc = {x=-4, y=-4, z=-4}, -- minimum acceleration
        maxacc = {x=4, y=4, z=4}, -- maximim acceleration
        minexptime = 0.1, -- minimum expiration time
        maxexptime = 1, -- maximum expiration time
        minsize = 0.5, -- minimum size (0.5 = half size)
        maxsize = (max_size or 1), -- maximum size (1=full resolution)
        collisiondetection = false, -- do particles stop when they hit solid node
        texture = texture, -- image to use (e.g. "bubble.png" )
        vertical = false, -- upright/vertical image for rain
        playername = "singleplayer", -- particles only appear for this player
    })
end


[Nathan.S]

Question related to particles, I'm adding them to my more_fire mod, and they are working great, however when I want to remove a particle spawner I end up deleting them all. according to the wiki I need to use

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Code: Select all

minetest.delete_particlespawner(id, player)

and in the description it says 'Deletes ParticleSpawner with id (return value from add_particlespawner)' How do I know what the id is though, I don't see anything in the particle spawner that says what the id will be. Currently I'm using an id of 1, which just deletes all spawners.

[Hybrid Dog]

Question related to particles, I'm adding them to my more_fire mod, and they are working great, however when I want to remove a particle spawner I end up deleting them all. according to the wiki I need to use

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.delete_particlespawner(id, player)

and in the description it says 'Deletes ParticleSpawner with id (return value from add_particlespawner)' How do I know what the id is though, I don't see anything in the particle spawner that says what the id will be. Currently I'm using an id of 1, which just deletes all spawners.

add_particlespawner returns the id, so just write id = minetest.add_particlespawner({<properties>})