### mod.conf
-A key-value store of mod details.
+A `Settings` file that provides meta information about the mod.
* `name`: The mod name. Allows Minetest to determine the mod name even if the
folder is wrongly named.
### `settingtypes.txt`
-A file in the same format as the one in builtin. It will be parsed by the
-settings menu and the settings will be displayed in the "Mods" category.
+The format is documented in `builtin/settingtypes.txt`.
+It is parsed by the main menu settings dialogue to list mod-specific
+settings in the "Mods" category.
### `init.lua`
* e.g. `{name = "default_place_node", gain = 1.0, pitch = 1.0}`
+Special sound files
+-------------------
+
+These sound files are played back by the engine if provided.
+
+ * `main_menu`: Looped sound in the main menu (gain = 1.0)
+ * `player_damage`: Played when the local player takes damage (gain = 0.5)
+ * `player_falling_damage`: Played when the local player takes
+ damage by falling (gain = 0.5)
Registered definitions
Special groups
--------------
-* `immortal`: Skips all damage and breath handling for an object. This group
- will also hide the integrated HUD status bars for players, and is
- automatically set to all players when damage is disabled on the server.
-* `punch_operable`: For entities; disables the regular damage mechanism for
- players punching it by hand or a non-tool item, so that it can do something
- else than take damage.
-* `level`: Can be used to give an additional sense of progression in the game.
- * A larger level will cause e.g. a weapon of a lower level make much less
- damage, and get worn out much faster, or not be able to get drops
- from destroyed nodes.
- * `0` is something that is directly accessible at the start of gameplay
- * There is no upper limit
+The asterisk `(*)` after a group name describes that there is no engine
+functionality bound to it, and implementation is left up as a suggestion
+to games.
+
+### Node, item and tool groups
+
+* `not_in_creative_inventory`: (*) Special group for inventory mods to indicate
+ that the item should be hidden in item lists.
+
+
+### Node-only groups
+
+* `attached_node`: if the node under it is not a walkable block the node will be
+ dropped as an item. If the node is wallmounted the wallmounted direction is
+ checked.
+* `bouncy`: value is bounce speed in percent
+* `connect_to_raillike`: makes nodes of raillike drawtype with same group value
+ connect to each other
* `dig_immediate`: Player can always pick up node without reducing tool wear
* `2`: the node always gets the digging time 0.5 seconds (rail, sign)
* `3`: the node always gets the digging time 0 seconds (torch)
* `disable_jump`: Player (and possibly other things) cannot jump from node
* `fall_damage_add_percent`: damage speed = `speed * (1 + value/100)`
-* `bouncy`: value is bounce speed in percent
* `falling_node`: if there is no walkable block under the node it will fall
* `float`: the node will not fall through liquids
-* `attached_node`: if the node under it is not a walkable block the node will be
- dropped as an item. If the node is wallmounted the wallmounted direction is
- checked.
-* `connect_to_raillike`: makes nodes of raillike drawtype with same group value
- connect to each other
+* `level`: Can be used to give an additional sense of progression in the game.
+ * A larger level will cause e.g. a weapon of a lower level make much less
+ damage, and get worn out much faster, or not be able to get drops
+ from destroyed nodes.
+ * `0` is something that is directly accessible at the start of gameplay
+ * There is no upper limit
+ * See also: `leveldiff` in [Tools]
* `slippery`: Players and items will slide on the node.
Slipperiness rises steadily with `slippery` value, starting at 1.
+
+
+### Tool-only groups
+
* `disable_repair`: If set to 1 for a tool, it cannot be repaired using the
`"toolrepair"` crafting recipe
+
+### `ObjectRef` groups
+
+* `immortal`: Skips all damage and breath handling for an object. This group
+ will also hide the integrated HUD status bars for players, and is
+ automatically set to all players when damage is disabled on the server.
+* `punch_operable`: For entities; disables the regular damage mechanism for
+ players punching it by hand or a non-tool item, so that it can do something
+ else than take damage.
+
+
+
Known damage and digging time defining groups
---------------------------------------------
Determines how many uses the tool has when it is used for digging a node,
of this group, of the maximum level. For lower leveled nodes, the use count
is multiplied by `3^leveldiff`.
+`leveldiff` is the difference of the tool's `maxlevel` `groupcaps` and the
+node's `level` group. The node cannot be dug if `leveldiff` is less than zero.
* `uses=10, leveldiff=0`: actual uses: 10
* `uses=10, leveldiff=1`: actual uses: 30
`MetaDataRef`
-------------
-See [`StorageRef`], [`NodeMetaRef`], [`ItemStackMetaRef`], and [`PlayerMetaRef`].
+Base class used by [`StorageRef`], [`NodeMetaRef`], [`ItemStackMetaRef`],
+and [`PlayerMetaRef`].
### Methods
* Writes changes to file.
* `to_table()`: returns `{[key1]=value1,...}`
+### Format
+
+The settings have the format `key = value`. Example:
+
+ foo = example text
+ bar = """
+ Multiline
+ value
+ """
+
+
`StorageRef`
------------
Mod metadata: per mod metadata, saved automatically.
Can be obtained via `minetest.get_mod_storage()` during load time.
+WARNING: This storage backend is incaptable to save raw binary data due
+to restrictions of JSON.
+
### Methods
* All methods in MetaDataRef
-----------------
Used by `ObjectRef` methods. Part of an Entity definition.
+These properties are not persistent, but are applied automatically to the
+corresponding Lua entity using the given registration fields.
+Player properties need to be saved manually.
{
hp_max = 1,
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