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+====== Modding Introduction ======
+Mindustry mods are simply directories of assets. There are many ways to use the modding API, depending on exactly what you want to do, and how far you're willing to go to do it.
+You could just resprite existing game content, you can create new game content with the simpler Json API (which is the main focus of this documentation), you can add custom sounds (or reuse existing ones). It's possible to add maps to campaign mode, and add scripts to program special behavior into your mod, like custom effects.
+Sharing your mod is as simple as giving someone your project directory; mods are also cross platfrom to any platform that supports them. You'll want to use GitHub (or a similar service) for hosting your source code. To make mods all you really need is any computer with a text editor.
+===== Directory Structure =====
+Your project directory should look something like this:
+project
+├── mod.hjson
+├── content
+│   ├── items
+│   ├── blocks
+│   ├── liquids
+│   └── units
+├── maps
+├── bundles
+├── sounds
+├── schematics
+├── scripts
+├── sprites-override
+└── sprites
+  * mod.hjson (required) metadata file for your mod,
+  * content/ directories for game Content,
+  * maps/ directory for in-game maps,
+  * bundles/ directory for Bundles,
+  * sounds/ directory for Sound files,
+  * schematics/ directory for Schematic files,
+  * scripts/ directory for Scripts,
+  * sprites-override/ Sprites directory for overriding ingame content,
+  * sprites/ Sprites directory for your content
+Every platform has a different user application data directory, and this is where your mods should be placed:
+  * Linux: ~/.local/share/Mindustry/mods/
+  * Steam:steam/steamapps/common/Mindustry/mods/
+  * Windows: %appdata%/Mindustry/mods/
+  * MacOS: ~/Library/Application Support/Mindustry/mods/
+Note that your filenames should be lowercased and hyphen separated:
+  * correct: my-custom-block.json
+  * incorrect: My Custom Block.json
+===== Hjson =====
+Mindustry uses Hjson, which for anyone who knows Json, is simply a superset of the very popular serialization language known as Json. – This means that any valid Json will work, but you get extra useful stuff:
+# single line comment
+// single line comment
+/* multiline
+comment */
+key1: single line string
+key2:
+'''
+multiline
+string
+'''
+key3: [ value 1
+        value 2
+        value 3 ]
+key4: { key1: string
+        key2: 0 }
+If you don't know any of those words. – A serialization language, is simply a language which encodes information for a program, and encode means to translate informantion from one form to another, and in this case, to translate text into Java data structures.
+===== mod.hjson =====
+At the root of your project directory, you must have a mod.json which defines the basic metadata for your project. This file can also be (optionally) named mod.hjson to potentially help your text editor pick better syntax highlighting.
+name: "mod-name"
+displayName: "This isn't a mod."
+author: Yourself
+description: "Bbfashbjhcbabfhsbafbhajbf"
+version: "1.0"
+minGameVersion: "135"
+dependencies: [ ]
+hidden: false
+  * name will be used to reference to your mod, so name it carefully;
+  * displayName this will be used as a display name for the UI, which you can use to add formatting to said name;
+  * description of the mod will be rendered in the ingame mod manager, so keep it short and to the point;
+  * dependencies is optional, if you want to know more about that, go to the dependencies section;
+  * minGameVersion is the minimum build version of the game. This is required to be a number greater than 105.
+  * hidden is whether or not this mod is essential for multiplayer, false by default. Texture packs, JS plugins, etc. should use this as to not cause conflicts with servers and clients respectively. As a rule of thumb, if your mod creates content it shouldn't be hidden.
+===== Content =====
+At the root of your project directory you can have a content/ directory, this is where all the Json/Hjson data goes. Inside of content/ you have subdirectories for the various kinds of content, these are the current common ones:
+  * content/items/ for items, like copper and surge-alloy;
+  * content/blocks/ for blocks, like turrets and floors;
+  * content/liquids/ for liquids, like water and slag;
+  * content/units/ for flying or ground units, like eclipse and dagger;
+Note that each one of these subdirectories needs a specific content type. The filenames of these files is important, because the stem name of your path (filename without the extension) is used to reference it.
+Furthermore the files within these content/<content-type>/* directories may be arbitrarly nested into other sub-directories of any name, to help you organize them further, for example:
+The content of these files will tend to look something like this:
+type: TypeOfThing
+name: Name Of Thing
+description: Description of thing.
+# ... more fields here ...
+field	type	notes
+type	String	Content type of this object.
+name	String	Displayed name of content.
+description	String	Displayed description of content.
+Other fields included will be the fields of the type itself.
+A side note, name and description are not required to be in the json structure. You can define them for any language with (Bundles)[#bundles]. However, if they are not present in either then the name will be .-.name and an empty description respectively.
+===== Types =====
+Types have numerous fields, but the important one is type; this is a special field used by the content parser, that changes which type your object is. A Router type can't be a Turret type, as they're just completely different.
+Types extend each other, so if MissileBulletType extends BasicBulletType, you'll have access to all the fields of BasicBulletType inside of MissileBulletType like damage, lifetime and speed. Fields are case sensitive: hitSize =/= hitsize.
+What you can expect a field to do is up to the specific type, some types do absolutely nothing with their fields, and work mostly as a base types will extend from. One such type is Block.
+In this unit example, the type of the unit is flying. The type of the bullet is BulletType, so you can use MissileBulletType, because MissileBulletType extends BulletType.
+One could also use mech, legs, naval or payload as the unit type here.
+type: flying
+weapons: [
+  {
+    bullet: {
+      type: MissileBulletType
+      damage: 9000
+    }
+  }
+]
+As of build 125.1, types can also be the fully-qualified class name of a Java class.
+For example, to specify a block as a MendProjector, you may write type: mindustry.world.blocks.defense.MendProjector instead of type: MendProjector.
+While not particularly useful for vanilla types, this can be used to load block types from other Java mods as dependencies.
+===== Tech Tree =====
+Much like type there exist another magical field known as research which can go at the root of any block object to put it in the techtree.
+research: duo
+This would put your block after duo in the techtree, and to put it after your own mods block you would write your <block-name>, a mod name prefix is only required if you're using the content from another mod.
+Research costs:
+type	cost	notes
+blocks	requirements ^ 1.1 * 20 * researchCostMultiplier	researchCostMultiplier is a stat that can be set on blocks
+units	requirements ^ 1.1 * 50	---
+The cost is then rounded down to the nearest 10, 100, 1k, 10k, or 100k depending on how expensive the cost is.
+requirements is the cost of the block or unit. Units use their build cost/upgrade cost for the calculations.
+If you want to set custom research requirements use this object in place of just a name:
+research: {
+  parent: duo
+  requirements: [
+    copper/100
+  ]
+}
+This can be used to override block or unit costs, or make resources need to be researched instead of just having to produce it.
+===== Sprites =====
+All you need to make sprites, is an image editor that supports transparency (aka: not paint). Block sprites should be 32 * size, so a 2x2 block would require a 64x64 image. Images must be PNG files with a 32-bit RGBA pixel format. Any other pixel format, such as 16-bit RGBA, may cause Mindustry to crash with a "Pixmap decode error". You can use the command-line tool file to print information about your sprites:
+file sprites/**.png
+If any of them are not 32-bit RGBA formatted, fix them.
+Sprites can simply be dropped in the sprites/ subdirectory. The content parser will look through it recursively. Images are packed into an "atlas" for efficient for rendering. The first directory in sprites/, e.g. sprites/blocks, determines the page in this atlas that sprites are put in. Putting a block's sprite in the units page is likely to cause lots of lag; thus, you should try to organize things similarly to how the vanilla game does.
+Content is going to look for sprites relative to it's own name. content/blocks/my-hail.json has the name my-hail and similarly sprites/my-hail.png has the name my-hail, so it'll be used by this content.
+Content may look for multiple sprites. my-hail could be a turret, and it could look for the suffix <name>-heat and what this means is it'll look for my-hail-heat.
+You can find all the vanilla sprites here:
+https://github.com/Anuken/Mindustry/tree/master/core/assets-raw/sprites
+Another thing to know about sprites is that some of them are modified by the game. Turrets specifically have a black border added to them, so you must account for that while making your sprites, leaving transparent space around turrets for example: Ripple
+To override ingame content sprites, you can simply put them in sprites-override/. This removes the <modname>- prefix to their id, which allows them to override sprites from vanilla and even other mods. You can also use this to create sprites with nice short names like cat for easy use with scripts, just beware of name collisions with other mods.
+===== Sound =====
+Custom sounds can be added through the modding system by dropping them in the sounds/ subdirectory. It doesn't matter where you put them after that. Two formats are supported: ogg and mp3. Note that mp3 files cannot loop seamlessly, so try to use ogg whenever possible.
+Just like any other assets, you reference them by the stem of your filenames, so pewpew.ogg and pewpew.mp3 can be referenced with pewpew from a field of type Sound.
+Here's a list of built-in sounds:
+artillery back bang beam bigshot boom breaks build buttonClick click combustion conveyor corexplode cutter door drill explosion explosionbig fire flame flame2 grinding hum laser laserbig laserblast lasercharge lasercharge2 lasershoot machine message mineDeploy minebeam missile mud noammo pew place plantBreak plasmaboom plasmadrop press pulse railgun rain release respawn respawning rockBreak sap shield shoot shootBig shootSnap shotgun smelter spark splash spray steam swish techloop thruster tractorbeam unlock wave wind wind2 wind3 windhowl windowHide none
+===== Dependencies =====
+You can add dependencies to your mod by simple adding other mods name in your mod.json:
+dependencies: [
+  other-mod-name
+  not-a-mod
+]
+The name of dependencies are lower-cased and spaces are replaced with - hyphens, for example Other MOD NamE becomes other-mod-name.
+To reference the other mods assets, you must prefix the asset with the other mods name:
+other-mod-name-not-copper would reference not-copper in other-mod-name
+other-mod-name-angry-dagger would reference angry-dagger in other-mod-name
+not-a-mod-angry-dagger would reference angry-dagger in not-a-mod
+===== Bundles =====
+An optional addition to your mod is called bundles. The main use of bundles are give translations of your content, but there's no reason you couldn't use them in English. These are plaintext files which go in the bundles/ subdirectory, and they should be named something like bundle_ru.properties (for Russian).
+The contents of this file is very simple:
+block.example-mod-silver-wall.name = Серебряная Стена
+block.example-mod-silver-wall.description = Стена из серебра.
+If you've read the first few sections of this guide, you'll spot it right away:
+<content type>.<mod name>-<content name>.name
+<content type>.<mod name>-<content name>.description
+With your own custom bundle lines for use in scripts you can use whatever key you like:
+message.egg = Eat your eggs
+randomline = Random Line
+Notes:
+mod/content names are lowercased and hyphen separated.
+List of content types:
+item block bullet liquid status unit weather sector error planet
+List of bundle suffixes relative to languages:
+en pt_PT bg zh_TW in_ID cs vi es pl lt it hu pt_BR et nl ja nl_BE ro zh_CN fi eu tr ko th sr be fil tk sv uk_UA de da ru fr
+===== GitHub =====
+Once you have a mod of some kind, you'll want to actually share it, and you may even want to work with other people on it, and to do that you can use GitHub. If you don't know what Git (or GitHub) is at all, then you should look into GitHub Desktop, otherwise simply use your favorite command line tool or text editor plugin.
+All you need understand is how to open repositories on GitHub, stage and commit changes in your local repository, and push changes to the GitHub repository. Once your project is on GitHub, there are three ways to share it:
+with the endpoint, for example Anuken/MindustryJavaModTemplate, which could then be typed in the ingame GitHub interface, and that would download it;
+with the zip file, for example https://github.com/Anuken/MindustryJavaModTemplate/archive/master.zip, which would download the repository as a zip file, and put in mod directory (unzipping is not required);
+add the topic/tag mindustry-mod on your repository, which should add it to the topic search and the Mod scraper.
+===== FAQ =====
+  * time in game is calculated through ticks;
+  * ticks sometimes called frames, are assumed to be 1/60th of a second;
+  * tilesize is 8 units internally;
+to calculate range out of lifetime and speed you can do lifetime * speed = range;
+  * Abstract what is abstract? All you need to know about abstract types is that they cannot be instantiated/initialized by themselves. If you do so, you'll get an "initialization exception" of some kind;
+  * what is a NullPointerException? This is an error message that indicates a field is null and shouldn't be null, meaning one of the required fields may be missing;
+  * bleeding-edge what is bleeding-edge? This is the developer version of Mindustry, specifically it's refering to the Github master branch. Changes on bleeding-edge usually make it into Mindustry in the next release.