Post your modding questions here

[HeroOfTheWinds]

@Fox:

times refers to how long it takes to break a node of the given level for the given group, in seconds. A block with the group cracky=2 would take 2.0 seconds to dig with the tool posted above.

uses is the durability of the tool. It says how many nodes of the hardest strength can be dug with the tool. Lesser nodes detract less from uses. So, with that tool, you could break 20 level 1 nodes (although it somewhat can't, as 1 has no times value), since maxlevel = 1. You could also break 60 level 2 nodes, or 180 level 3 nodes. It's powers of three between values, if I remember correctly.

maxlevel is the "hardest" node you can break of the given group with the tool. This is an inverse relationship; 1 is highest, 3 is lowest. default:stone is level 3, but default:obsidian is level 1.

damage_groups are similar, but I think they actually are the reverse of above... 1 is weak, 10 is strong.

full_punch_interval is the time between swings at full power. This really only applies to weapons. If you just rapid click, your hits are weak and may not even do damage. But if you wait as long as full_punch_interval between clicks, you will do the most damage you can.

Hope this helps!

[Chinchow]

How would one go about removing a hud during gameplay?
EDIT: Never mind, it took me awhile, but I figured it out.

[Kilarin]

Greetings and Salutations!
I'm working on a game where I would like to have pvp work in one part of the world, but be disabled in another.
I could simply instantly heal characters whenever they are hurt in the non-pvp area, BUT, I'm not certain how to detect if the damage came from another player or not. If I heal ANY damage, then mobs, falling, lava, drowning, etc. now become pointless.

I found this thread: https://forum.minetest.net/viewtopic.php?id=8901
asking for something similar, but it did not get an answer to the problem.

So is it possible to disable pvp (but not ALL forms of damage) in one region of the world and not in another?

Thanks in advance for your help

[paramat]

But you could copy the list of registered ores, clear the ores and then reregister the modified ores. It is a little complicated, but it could work.

Yes that works.
Write a mod that depends on (and therefore runs after) default.
First lines should be any combination of 'clear biomes / decorations / ores'.
Then define your own versions of the categories you just cleared.

[paramat]

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

             --local vi = area:index(x0, y, z) -- This accesses the node at a given position
             for x = x0, x1 do -- for each node do
                local vi = area:index(x, y, z) -- This accesses the node at a given position

Now works!!! thank you Hero and TeTpaAka!

It's supposed to be used as an array.

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

   local vi = area:index(x0, y, z) -- This accesses the node at a given position
   for x = x0, x1 do -- for each node do
      -- Codes..
      vi = vi + 1
   end

^ Correct, HOTWinds' first example was missing the vi = vi + 1.
Kilarin, this method works faster because you don't calculate the LVM index for every node, only for the first node in each x row, hence (x0, y, z). Then, the vi = vi + 1 increments the index along the x row of nodes.
This can be done only because a LVM index always increments by 1 in the positive x direction (the y and z directions are much more complex increments).
Calculating the index for every node works but is slower and unneccesary.

[drkwv]

Is it possible to make block "fall" like sand but in another direction for some time?

[12Me21]

hmm, you could have it check if there is air in the direction that it would fall, and move the block to the side if there is, maybe look at the code for movestones. (in mesecons)

[rubenwardy]

Is it possible to make block "fall" like sand but in another direction for some time?

Use the group falling = 1

[12Me21]

Is it possible to make block "fall" like sand but in another direction for some time?

Use the group falling = 1

will that work for falling in other directions though?

[Krock]

will that work for falling in other directions though?

Nope, only downwards.

[HeroOfTheWinds]

Check the code in falling.lua. Or better yet, look at the related file in my Caverealms mod. Just adjust a few of the velocity parameters, and you can change the direction of movement.

[Chinchow]

Is it at all possible to change the max player hp?

[TeTpaAka]

Is it at all possible to change the max player hp?

Currently, sadly no. See this.

[Krock]

Is it at all possible to change the max player hp?

Don't be sad. It already has been added to the 0.5.0 roadmap.
https://github.com/minetest/minetest/issues/2370

[Hybrid Dog]

but there's a mod that adds a heart staff with which you can increase the player hp

[12Me21]

Is there a way to "un-define" a crafting recipe that is used in another mod? (without editing that mod's files)

For example, could I make a mod that when installed, didn't allow you to craft copper and iron into bronze?

[Hybrid Dog]

Is there a way to "un-define" a crafting recipe that is used in another mod? (without editing that mod's files)

For example, could I make a mod that when installed, didn't allow you to craft copper and iron into bronze?

you can block crafting
viewtopic.php?f=47&t=4668&p=170022#p170022
https://github.com/HybridDog/minetest-n ... g.lua#L164

[12Me21]

How would I allow mesecons logic gates (and other stuff) to face in all 6 directions, not just 4?

[Joz]

A world generator question:
How do I index the flat arrays returned by get3d_map_flat and get2d_map_flat?

I have recently tried to do the same as other lua map generators but what ive done is not perfectly working.

Can someone provide a minimal working example of using flat noise arrays?

[12Me21]

Is it possible to change the crosshair's size/position/shape?

[Krock]

Is it possible to change the crosshair's size/position/shape?

Yes, just create a crosshair.png image in your texture pack, subgame or mod.
You can use any size but you can't change the position in-game.

Can someone provide a minimal working example of using flat noise arrays?

It's easy. You need a variable, increase it by 1 to get though the complete array.
Here's an example: https://github.com/SmallJoker/yappy/blo ... t.lua#L227
I hope it's useful to you.

[paramat]

For an array with all 3 sidelengths = sidelen, with minimum point x0, y0, z0

index =
(z - z0) * sidelen^2
+ (y - y0) * sidelen
+ (x - x0)
+ 1

Incrementing the index by 1 works along an x row eastwards (x direction), then works through each x row upwards (y direction), then works through each vertical slice northwards (z direction).
The flat array is in order [z[y[x]]].

2D works the same way as a subset of that. However perlinmap y is usually mapped to world z because we usually use 2D noise in the (world x, world z) horizontal plane.

index =
+ (y - y0) * sidelen
+ (x - x0)
+ 1

[Don]

Is there a way to make raillike walkable on slopes?

[Krock]

Is there a way to make raillike walkable on slopes?

Mesh is not raillike. If you add rails on the textures, they won't connect to regular rails.
With carts, it might work when you add the group rail = 1.

[Don]

Is there a way to make raillike walkable on slopes?

Mesh is not raillike. If you add rails on the textures, they won't connect to regular rails.
With carts, it might work when you add the group rail = 1.

I am working on a mod that uses rail like. I want the rails to be walkable. If you place raillike nodes on an incline you can not walk up it. The collision box for rail like nodes will not allow it.
I was wondering if there is a solution to this or not.

[12Me21]

Is there a way to make raillike walkable on slopes?

Mesh is not raillike. If you add rails on the textures, they won't connect to regular rails.
With carts, it might work when you add the group rail = 1.

I am working on a mod that uses rail like. I want the rails to be walkable. If you place raillike nodes on an incline you can not walk up it. The collision box for rail like nodes will not allow it.
I was wondering if there is a solution to this or not.

You could make them connect without using raillike, like with mesecons, except with slopes instead of wires.

[Krock]

The collision box for rail like nodes will not allow it.

Have you tried to define the collision_box? If that doesn't work, I'm out of ideas.

You could make them connect without using raillike, like with mesecons, except with slopes instead of wires.

Mesecons uses a complicated way to connect those wires, it has many, many different nodes for each situation.

[Don]

I will look into mesecons.
You can not redefine the collision box for raillike noeds to make it work. It changes all nodes even if they are flat.
Thanks for your help.

[12Me21]

The collision box for rail like nodes will not allow it.

Have you tried to define the collision_box? If that doesn't work, I'm out of ideas.

You could make them connect without using raillike, like with mesecons, except with slopes instead of wires.

Mesecons uses a complicated way to connect those wires, it has many, many different nodes for each situation.

For raillike, you would just need... technically, 5 nodes:
straight
corner
T
crossing
slope

[12Me21]

How do you use default.generate_ore and minetest.register_ore?
specifically, how do you convert code for default.generate_ore to minetest.register_ore?