Luanti Curriculum: Our First Mod (Lesson 02)

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Time to start coding and make our very first mod. It won't be anything huge or fancy, but building a pyramid starts with moving a grain of sand.  Download Luanti: https://www.luanti.org/downloads/  https://www.nathansalapat.com/LMC/02-first-mod https://nathansalapat.com/SocialMedia https://nathansalapat.com/support-me

Transcript

00:00In this video, we'll be making our first mod.

00:04As you can see, it's going to be pretty basic, just a full grass node and recipe.

00:08The first step is to create a new directory in our mods directory for all the mod files.

00:12We're going to call our first mod grass, so we'll create a directory called grass.

00:16This mod is going to be very basic, so we're only going to need two files,

00:20init.lua and mod.conf.

00:24You can create these in the file browser or in the code editor.

00:28I'm going to open the project directory in Pulsar and create the two new files.

00:33init.lua will hold the actual code for the mod.

00:36mod.conf stores some configuration data that tells Luanti about the mod.

00:40Every mod will need, at very least, these two files.

00:43We'll take care of the mod.conf file first.

00:46Luanti expects a few different bits of data.

00:49A name, title, description, dependencies, and an author.

00:53The name is the internal name of the mod.

00:55All nodes and items will be named with name colon something.

00:59The title is a human-friendly name and will be displayed in the mod selection dialog in Luanti.

01:05For this mod, we'll just use grass for both.

01:07The description is a short sentence explaining what the mod is, does, adds, etc.

01:12Dependencies tell Luanti what your mod needs or can use.

01:16We'll cover them more in a later video.

01:19This mod will only depend on default.

01:21Lastly, the author should be set to your content database username if you have an account there.

01:26Now, onto writing some actual code.

01:28We'll start with registering a new node called grass-grass.

01:32Remember, every node in this mod needs to start with grass colon.

01:36The description will be shown when hovering the node in most inventory screens.

01:45The tiles are the textures that Luanti will render on the faces of the node.

01:50If all the faces have the same texture, we only need to list the texture once.

01:54We'll cover this more in a future video.

01:56Groups can do many different things.

01:59In this case, the crumbly group is needed for tools, so Luanti knows what tools should be able to break the node.

02:05The soil group is used by other mods, but we'll just include it for compatibility.

02:10When we break this node, we don't actually want to get back to full grass block, but rather dirt.

02:16So, we'll tell the engine that on breaking, the node should drop default dirt.

02:21We can do a lot more with the drop table, but we'll cover that more in another video.

02:26This is a really basic node registration.

02:29Nodes can have callbacks so that they're more interactive, but for the time being, this will suffice.

02:34Right now, there is no way to craft this node.

02:37We can get it via creative or using the give command, but it would be really nice to be able to craft it.

02:42So, let's add a craft recipe.

02:44This is structured a bit different than the node registration.

02:47We use an output to say what the node or item is that's created.

02:52The recipe is a table, and the default craft grid is a 3x3 square.

02:56So, we have 9 items max we can use.

02:58We need to know the item strings for each ingredient.

03:01A blank entry just means the inventory slot should be empty.

03:05How do we know the item strings though?

03:07There are many different items in a game, and it would be nearly impossible to ever remember all of them.

03:12The easiest way is to open Luanti, go into settings, click on the user interfaces heading on the side, and check the append item name option.

03:22Now, if we launch a world with creative enabled, we can search for any item and hover on it in inventory to get the item string.

03:29Some inventory mods will also give us this data without enabling this option.

03:33We want to use grass and dirt to make the full grass block, but there are several different stages of grass in the game.

03:40Thankfully, they all drop the same item.

03:43So, we can just use default colon grass underscore one in the recipe.

03:48Our recipe will be one dirt in the center, with one grass on top, right, bottom, and left.

03:54Launching a world, with our new mod enabled, we can dig up some dirt, collect a bit of grass, and craft our new node.

04:03Let's add another recipe, just for fun.

04:06This recipe will just be one dirt and one grass.

04:09Our table doesn't need to have two rows of blanks, so we can put the entire recipe on one line.

04:14We'll just set our output to be default dirt underscore width underscore grass.

04:19Mods can make recipes for nodes that other mods provide.

04:23We just need to make sure that the other mods we want to use items from are listed in our dependencies in the mod.com file.

04:33Well, that wraps this lesson up, but before you go, homework!

04:39Add the other grasses to this mod, so we can craft full grass nodes of all the grasses, and make craft recipes for them as well.

04:47There's a link to a completed mod on the related webpage.

04:52Thank you!

04:53Thank you, correct.

04:55I'll show you all the instructions.

04:57Don't know your instructions, so we can save the water and Geb Jay.

05:02It's for the next page!

05:03We can use the calculations of the behav.

05:04You can use the neurologic entrar, so we can use the problem.

05:08We can use the tools to make...

05:09...we can use the brain as well.

05:11We can use the dificultness of the system, and use the system.

05:14The reason should be the next part, so we can use the system to control the system.

05:16We can use the documentation and use the system.

05:17The idea is 길 and need to understand those things.

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