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Remove redundant and/or outdated client API docs

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doc/client_lua_api.md
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@ -8,7 +8,7 @@ Introduction
** WARNING: The client API is currently unstable, and may break/change without warning. **
Content and functionality can be added to Minetest 0.4.15-dev+ by using Lua
Content and functionality can be added to Minetest by using Lua
scripting in run-time loaded mods.
A mod is a self-contained bunch of scripts, textures and other related
@ -62,7 +62,7 @@ Generic:
In a run-in-place version (e.g. the distributed windows version):
* `minetest-0.4.x/clientmods/` (User-installed mods)
* `minetest/clientmods/` (User-installed mods)
On an installed version on Linux:
@ -185,15 +185,9 @@ Examples of sound parameter tables:
pos = {x = 1, y = 2, z = 3},
gain = 1.0, -- default
}
-- Play connected to an object, looped
{
object = <an ObjectRef>,
gain = 1.0, -- default
loop = true,
}
```
Looped sounds must either be connected to an object or played locationless.
Looped sounds must be played locationless.
### SimpleSoundSpec
* e.g. `""`
@ -220,387 +214,20 @@ For helper functions see "Vector helpers".
Flag Specifier Format
---------------------
Flags using the standardized flag specifier format can be specified in either of
two ways, by string or table.
The string format is a comma-delimited set of flag names; whitespace and
unrecognized flag fields are ignored. Specifying a flag in the string sets the
flag, and specifying a flag prefixed by the string `"no"` explicitly
clears the flag from whatever the default may be.
In addition to the standard string flag format, the schematic flags field can
also be a table of flag names to boolean values representing whether or not the
flag is set. Additionally, if a field with the flag name prefixed with `"no"`
is present, mapped to a boolean of any value, the specified flag is unset.
E.g. A flag field of value
```lua
{place_center_x = true, place_center_y=false, place_center_z=true}
```
is equivalent to
```lua
{place_center_x = true, noplace_center_y=true, place_center_z=true}
```
which is equivalent to
```lua
"place_center_x, noplace_center_y, place_center_z"
```
or even
```lua
"place_center_x, place_center_z"
```
since, by default, no schematic attributes are set.
Refer to `lua_api.md`.
Formspec
--------
Formspec defines a menu. It is a string, with a somewhat strange format.
Spaces and newlines can be inserted between the blocks, as is used in the
examples.
### Examples
#### Chest
size[8,9]
list[context;main;0,0;8,4;]
list[current_player;main;0,5;8,4;]
#### Furnace
size[8,9]
list[context;fuel;2,3;1,1;]
list[context;src;2,1;1,1;]
list[context;dst;5,1;2,2;]
list[current_player;main;0,5;8,4;]
#### Minecraft-like player inventory
size[8,7.5]
image[1,0.6;1,2;player.png]
list[current_player;main;0,3.5;8,4;]
list[current_player;craft;3,0;3,3;]
list[current_player;craftpreview;7,1;1,1;]
### Elements
#### `size[<W>,<H>,<fixed_size>]`
* Define the size of the menu in inventory slots
* `fixed_size`: `true`/`false` (optional)
* deprecated: `invsize[<W>,<H>;]`
#### `container[<X>,<Y>]`
* Start of a container block, moves all physical elements in the container by (X, Y)
* Must have matching container_end
* Containers can be nested, in which case the offsets are added
(child containers are relative to parent containers)
#### `container_end[]`
* End of a container, following elements are no longer relative to this container
#### `list[<inventory location>;<list name>;<X>,<Y>;<W>,<H>;]`
* Show an inventory list
#### `list[<inventory location>;<list name>;<X>,<Y>;<W>,<H>;<starting item index>]`
* Show an inventory list
#### `listring[<inventory location>;<list name>]`
* Allows to create a ring of inventory lists
* Shift-clicking on items in one element of the ring
will send them to the next inventory list inside the ring
* The first occurrence of an element inside the ring will
determine the inventory where items will be sent to
#### `listring[]`
* Shorthand for doing `listring[<inventory location>;<list name>]`
for the last two inventory lists added by list[...]
#### `listcolors[<slot_bg_normal>;<slot_bg_hover>]`
* Sets background color of slots as `ColorString`
* Sets background color of slots on mouse hovering
#### `listcolors[<slot_bg_normal>;<slot_bg_hover>;<slot_border>]`
* Sets background color of slots as `ColorString`
* Sets background color of slots on mouse hovering
* Sets color of slots border
#### `listcolors[<slot_bg_normal>;<slot_bg_hover>;<slot_border>;<tooltip_bgcolor>;<tooltip_fontcolor>]`
* Sets background color of slots as `ColorString`
* Sets background color of slots on mouse hovering
* Sets color of slots border
* Sets default background color of tooltips
* Sets default font color of tooltips
#### `tooltip[<gui_element_name>;<tooltip_text>;<bgcolor>,<fontcolor>]`
* Adds tooltip for an element
* `<bgcolor>` tooltip background color as `ColorString` (optional)
* `<fontcolor>` tooltip font color as `ColorString` (optional)
#### `image[<X>,<Y>;<W>,<H>;<texture name>]`
* Show an image
* Position and size units are inventory slots
#### `item_image[<X>,<Y>;<W>,<H>;<item name>]`
* Show an inventory image of registered item/node
* Position and size units are inventory slots
#### `bgcolor[<color>;<fullscreen>]`
* Sets background color of formspec as `ColorString`
* If `true`, the background color is drawn fullscreen (does not affect the size of the formspec)
#### `background[<X>,<Y>;<W>,<H>;<texture name>]`
* Use a background. Inventory rectangles are not drawn then.
* Position and size units are inventory slots
* Example for formspec 8x4 in 16x resolution: image shall be sized
8 times 16px times 4 times 16px.
#### `background[<X>,<Y>;<W>,<H>;<texture name>;<auto_clip>]`
* Use a background. Inventory rectangles are not drawn then.
* Position and size units are inventory slots
* Example for formspec 8x4 in 16x resolution:
image shall be sized 8 times 16px times 4 times 16px
* If `true` the background is clipped to formspec size
(`x` and `y` are used as offset values, `w` and `h` are ignored)
#### `pwdfield[<X>,<Y>;<W>,<H>;<name>;<label>]`
* Textual password style field; will be sent to server when a button is clicked
* When enter is pressed in field, fields.key_enter_field will be sent with the name
of this field.
* `x` and `y` position the field relative to the top left of the menu
* `w` and `h` are the size of the field
* Fields are a set height, but will be vertically centered on `h`
* Position and size units are inventory slots
* `name` is the name of the field as returned in fields to `on_receive_fields`
* `label`, if not blank, will be text printed on the top left above the field
* See field_close_on_enter to stop enter closing the formspec
#### `field[<X>,<Y>;<W>,<H>;<name>;<label>;<default>]`
* Textual field; will be sent to server when a button is clicked
* When enter is pressed in field, fields.key_enter_field will be sent with the name
of this field.
* `x` and `y` position the field relative to the top left of the menu
* `w` and `h` are the size of the field
* Fields are a set height, but will be vertically centered on `h`
* Position and size units are inventory slots
* `name` is the name of the field as returned in fields to `on_receive_fields`
* `label`, if not blank, will be text printed on the top left above the field
* `default` is the default value of the field
* `default` may contain variable references such as `${text}'` which
will fill the value from the metadata value `text`
* **Note**: no extra text or more than a single variable is supported ATM.
* See field_close_on_enter to stop enter closing the formspec
#### `field[<name>;<label>;<default>]`
* As above, but without position/size units
* When enter is pressed in field, fields.key_enter_field will be sent with the name
of this field.
* Special field for creating simple forms, such as sign text input
* Must be used without a `size[]` element
* A "Proceed" button will be added automatically
* See field_close_on_enter to stop enter closing the formspec
#### `field_close_on_enter[<name>;<close_on_enter>]`
* <name> is the name of the field
* if <close_on_enter> is false, pressing enter in the field will submit the form but not close it
* defaults to true when not specified (ie: no tag for a field)
#### `textarea[<X>,<Y>;<W>,<H>;<name>;<label>;<default>]`
* Same as fields above, but with multi-line input
#### `label[<X>,<Y>;<label>]`
* `x` and `y` work as per field
* `label` is the text on the label
* Position and size units are inventory slots
#### `vertlabel[<X>,<Y>;<label>]`
* Textual label drawn vertically
* `x` and `y` work as per field
* `label` is the text on the label
* Position and size units are inventory slots
#### `button[<X>,<Y>;<W>,<H>;<name>;<label>]`
* Clickable button. When clicked, fields will be sent.
* `x`, `y` and `name` work as per field
* `w` and `h` are the size of the button
* Fixed button height. It will be vertically centered on `h`
* `label` is the text on the button
* Position and size units are inventory slots
#### `image_button[<X>,<Y>;<W>,<H>;<texture name>;<name>;<label>]`
* `x`, `y`, `w`, `h`, and `name` work as per button
* `texture name` is the filename of an image
* Position and size units are inventory slots
#### `image_button[<X>,<Y>;<W>,<H>;<texture name>;<name>;<label>;<noclip>;<drawborder>;<pressed texture name>]`
* `x`, `y`, `w`, `h`, and `name` work as per button
* `texture name` is the filename of an image
* Position and size units are inventory slots
* `noclip=true` means the image button doesn't need to be within specified formsize
* `drawborder`: draw button border or not
* `pressed texture name` is the filename of an image on pressed state
#### `item_image_button[<X>,<Y>;<W>,<H>;<item name>;<name>;<label>]`
* `x`, `y`, `w`, `h`, `name` and `label` work as per button
* `item name` is the registered name of an item/node,
tooltip will be made out of its description
to override it use tooltip element
* Position and size units are inventory slots
#### `button_exit[<X>,<Y>;<W>,<H>;<name>;<label>]`
* When clicked, fields will be sent and the form will quit.
#### `image_button_exit[<X>,<Y>;<W>,<H>;<texture name>;<name>;<label>]`
* When clicked, fields will be sent and the form will quit.
#### `textlist[<X>,<Y>;<W>,<H>;<name>;<listelem 1>,<listelem 2>,...,<listelem n>]`
* Scrollable item list showing arbitrary text elements
* `x` and `y` position the itemlist relative to the top left of the menu
* `w` and `h` are the size of the itemlist
* `name` fieldname sent to server on doubleclick value is current selected element
* `listelements` can be prepended by #color in hexadecimal format RRGGBB (only),
* if you want a listelement to start with "#" write "##".
#### `textlist[<X>,<Y>;<W>,<H>;<name>;<listelem 1>,<listelem 2>,...,<listelem n>;<selected idx>;<transparent>]`
* Scrollable itemlist showing arbitrary text elements
* `x` and `y` position the item list relative to the top left of the menu
* `w` and `h` are the size of the item list
* `name` fieldname sent to server on doubleclick value is current selected element
* `listelements` can be prepended by #RRGGBB (only) in hexadecimal format
* if you want a listelement to start with "#" write "##"
* Index to be selected within textlist
* `true`/`false`: draw transparent background
* See also `minetest.explode_textlist_event` (main menu: `engine.explode_textlist_event`)
#### `tabheader[<X>,<Y>;<name>;<caption 1>,<caption 2>,...,<caption n>;<current_tab>;<transparent>;<draw_border>]`
* Show a tab**header** at specific position (ignores formsize)
* `x` and `y` position the itemlist relative to the top left of the menu
* `name` fieldname data is transferred to Lua
* `caption 1`...: name shown on top of tab
* `current_tab`: index of selected tab 1...
* `transparent` (optional): show transparent
* `draw_border` (optional): draw border
#### `box[<X>,<Y>;<W>,<H>;<color>]`
* Simple colored semitransparent box
* `x` and `y` position the box relative to the top left of the menu
* `w` and `h` are the size of box
* `color` is color specified as a `ColorString`
#### `dropdown[<X>,<Y>;<W>;<name>;<item 1>,<item 2>, ...,<item n>;<selected idx>]`
* Show a dropdown field
* **Important note**: There are two different operation modes:
1. handle directly on change (only changed dropdown is submitted)
2. read the value on pressing a button (all dropdown values are available)
* `x` and `y` position of dropdown
* Width of dropdown
* Fieldname data is transferred to Lua
* Items to be shown in dropdown
* Index of currently selected dropdown item
#### `checkbox[<X>,<Y>;<name>;<label>;<selected>]`
* Show a checkbox
* `x` and `y`: position of checkbox
* `name` fieldname data is transferred to Lua
* `label` to be shown left of checkbox
* `selected` (optional): `true`/`false`
#### `scrollbar[<X>,<Y>;<W>,<H>;<orientation>;<name>;<value>]`
* Show a scrollbar
* There are two ways to use it:
1. handle the changed event (only changed scrollbar is available)
2. read the value on pressing a button (all scrollbars are available)
* `x` and `y`: position of trackbar
* `w` and `h`: width and height
* `orientation`: `vertical`/`horizontal`
* Fieldname data is transferred to Lua
* Value this trackbar is set to (`0`-`1000`)
* See also `minetest.explode_scrollbar_event` (main menu: `engine.explode_scrollbar_event`)
#### `table[<X>,<Y>;<W>,<H>;<name>;<cell 1>,<cell 2>,...,<cell n>;<selected idx>]`
* Show scrollable table using options defined by the previous `tableoptions[]`
* Displays cells as defined by the previous `tablecolumns[]`
* `x` and `y`: position the itemlist relative to the top left of the menu
* `w` and `h` are the size of the itemlist
* `name`: fieldname sent to server on row select or doubleclick
* `cell 1`...`cell n`: cell contents given in row-major order
* `selected idx`: index of row to be selected within table (first row = `1`)
* See also `minetest.explode_table_event` (main menu: `engine.explode_table_event`)
#### `tableoptions[<opt 1>;<opt 2>;...]`
* Sets options for `table[]`
* `color=#RRGGBB`
* default text color (`ColorString`), defaults to `#FFFFFF`
* `background=#RRGGBB`
* table background color (`ColorString`), defaults to `#000000`
* `border=<true/false>`
* should the table be drawn with a border? (default: `true`)
* `highlight=#RRGGBB`
* highlight background color (`ColorString`), defaults to `#466432`
* `highlight_text=#RRGGBB`
* highlight text color (`ColorString`), defaults to `#FFFFFF`
* `opendepth=<value>`
* all subtrees up to `depth < value` are open (default value = `0`)
* only useful when there is a column of type "tree"
#### `tablecolumns[<type 1>,<opt 1a>,<opt 1b>,...;<type 2>,<opt 2a>,<opt 2b>;...]`
* Sets columns for `table[]`
* Types: `text`, `image`, `color`, `indent`, `tree`
* `text`: show cell contents as text
* `image`: cell contents are an image index, use column options to define images
* `color`: cell contents are a ColorString and define color of following cell
* `indent`: cell contents are a number and define indentation of following cell
* `tree`: same as indent, but user can open and close subtrees (treeview-like)
* Column options:
* `align=<value>`
* for `text` and `image`: content alignment within cells.
Available values: `left` (default), `center`, `right`, `inline`
* `width=<value>`
* for `text` and `image`: minimum width in em (default: `0`)
* for `indent` and `tree`: indent width in em (default: `1.5`)
* `padding=<value>`: padding left of the column, in em (default `0.5`).
Exception: defaults to 0 for indent columns
* `tooltip=<value>`: tooltip text (default: empty)
* `image` column options:
* `0=<value>` sets image for image index 0
* `1=<value>` sets image for image index 1
* `2=<value>` sets image for image index 2
* and so on; defined indices need not be contiguous empty or
non-numeric cells are treated as `0`.
* `color` column options:
* `span=<value>`: number of following columns to affect (default: infinite)
**Note**: do _not_ use an element name starting with `key_`; those names are reserved to
pass key press events to formspec!
For details, refer to `lua_api.md`.
Spatial Vectors
---------------
* `vector.new(a[, b, c])`: returns a vector:
* A copy of `a` if `a` is a vector.
* `{x = a, y = b, z = c}`, if all `a, b, c` are defined
* `vector.direction(p1, p2)`: returns a vector
* `vector.distance(p1, p2)`: returns a number
* `vector.length(v)`: returns a number
* `vector.normalize(v)`: returns a vector
* `vector.floor(v)`: returns a vector, each dimension rounded down
* `vector.round(v)`: returns a vector, each dimension rounded to nearest int
* `vector.apply(v, func)`: returns a vector
* `vector.combine(v, w, func)`: returns a vector
* `vector.equals(v1, v2)`: returns a boolean
For the following functions `x` can be either a vector or a number:
* `vector.add(v, x)`: returns a vector
* `vector.subtract(v, x)`: returns a vector
* `vector.multiply(v, x)`: returns a scaled vector or Schur product
* `vector.divide(v, x)`: returns a scaled vector or Schur quotient
Refer to `lua_api.md`.
Helper functions
----------------
@ -1319,6 +946,7 @@ It can be created via `Raycast(pos1, pos2, objects, liquids)` or
```
### Server info
```lua
{
address = "minetest.example.org", -- The domain name/IP address of a remote server or "" for a local server.
@ -1330,32 +958,7 @@ It can be created via `Raycast(pos1, pos2, objects, liquids)` or
### HUD Definition (`hud_add`, `hud_get`)
```lua
{
type = "image", -- see HUD element types, default "text"
-- ^ type of HUD element, can be either of "image", "text", "statbar", or "inventory"
hud_elem_type = "image",
-- ^ Deprecated, same as `type`. In case both are specified `type` will be used.
position = {x=0.5, y=0.5},
-- ^ Left corner position of element, default `{x=0,y=0}`.
name = "<name>", -- default ""
scale = {x=2, y=2}, -- default {x=0,y=0}
text = "<text>", -- default ""
number = 2, -- default 0
item = 3, -- default 0
-- ^ Selected item in inventory. 0 for no item selected.
direction = 0, -- default 0
-- ^ Direction: 0: left-right, 1: right-left, 2: top-bottom, 3: bottom-top
alignment = {x=0, y=0}, -- default {x=0, y=0}
-- ^ See "HUD Element Types"
offset = {x=0, y=0}, -- default {x=0, y=0}
-- ^ See "HUD Element Types"
size = { x=100, y=100 }, -- default {x=0, y=0}
-- ^ Size of element in pixels
style = 0,
-- ^ For "text" elements sets font style: bitfield with 1 = bold, 2 = italic, 4 = monospace
}
```
Refer to `lua_api.md`.
Escape sequences
----------------
@ -1383,177 +986,17 @@ The following functions provide escape sequences:
`ColorString`
-------------
`#RGB` defines a color in hexadecimal format.
`#RGBA` defines a color in hexadecimal format and alpha channel.
`#RRGGBB` defines a color in hexadecimal format.
`#RRGGBBAA` defines a color in hexadecimal format and alpha channel.
Named colors are also supported and are equivalent to
[CSS Color Module Level 4](http://dev.w3.org/csswg/css-color/#named-colors).
To specify the value of the alpha channel, append `#A` or `#AA` to the end of
the color name (e.g. `colorname#08`).
Refer to `lua_api.md`.
`Color`
-------------
`{a = alpha, r = red, g = green, b = blue}` defines an ARGB8 color.
HUD element types
-----------------
The position field is used for all element types.
To account for differing resolutions, the position coordinates are the percentage
of the screen, ranging in value from `0` to `1`.
The name field is not yet used, but should contain a description of what the
HUD element represents. The direction field is the direction in which something
is drawn.
`0` draws from left to right, `1` draws from right to left, `2` draws from
top to bottom, and `3` draws from bottom to top.
The `alignment` field specifies how the item will be aligned. It ranges from `-1` to `1`,
with `0` being the center, `-1` is moved to the left/up, and `1` is to the right/down.
Fractional values can be used.
The `offset` field specifies a pixel offset from the position. Contrary to position,
the offset is not scaled to screen size. This allows for some precisely-positioned
items in the HUD.
**Note**: `offset` _will_ adapt to screen DPI as well as user defined scaling factor!
Below are the specific uses for fields in each type; fields not listed for that type are ignored.
**Note**: Future revisions to the HUD API may be incompatible; the HUD API is still
in the experimental stages.
### `image`
Displays an image on the HUD.
* `scale`: The scale of the image, with 1 being the original texture size.
Only the X coordinate scale is used (positive values).
Negative values represent that percentage of the screen it
should take; e.g. `x=-100` means 100% (width).
* `text`: The name of the texture that is displayed.
* `alignment`: The alignment of the image.
* `offset`: offset in pixels from position.
### `text`
Displays text on the HUD.
* `scale`: Defines the bounding rectangle of the text.
A value such as `{x=100, y=100}` should work.
* `text`: The text to be displayed in the HUD element.
* `number`: An integer containing the RGB value of the color used to draw the text.
Specify `0xFFFFFF` for white text, `0xFF0000` for red, and so on.
* `alignment`: The alignment of the text.
* `offset`: offset in pixels from position.
### `statbar`
Displays a horizontal bar made up of half-images.
* `text`: The name of the texture that is used.
* `number`: The number of half-textures that are displayed.
If odd, will end with a vertically center-split texture.
* `direction`
* `offset`: offset in pixels from position.
* `size`: If used, will force full-image size to this value (override texture pack image size)
### `inventory`
* `text`: The name of the inventory list to be displayed.
* `number`: Number of items in the inventory to be displayed.
* `item`: Position of item that is selected.
* `direction`
* `offset`: offset in pixels from position.
### `waypoint`
Displays distance to selected world position.
* `name`: The name of the waypoint.
* `text`: Distance suffix. Can be blank.
* `precision`: Waypoint precision, integer >= 0. Defaults to 10.
If set to 0, distance is not shown. Shown value is `floor(distance*precision)/precision`.
When the precision is an integer multiple of 10, there will be `log_10(precision)` digits after the decimal point.
`precision = 1000`, for example, will show 3 decimal places (eg: `0.999`).
`precision = 2` will show multiples of `0.5`; precision = 5 will show multiples of `0.2` and so on:
`precision = n` will show multiples of `1/n`
* `number:` An integer containing the RGB value of the color used to draw the
text.
* `world_pos`: World position of the waypoint.
* `offset`: offset in pixels from position.
* `alignment`: The alignment of the waypoint.
### `image_waypoint`
Same as `image`, but does not accept a `position`; the position is instead determined by `world_pos`, the world position of the waypoint.
* `scale`: The scale of the image, with 1 being the original texture size.
Only the X coordinate scale is used (positive values).
Negative values represent that percentage of the screen it
should take; e.g. `x=-100` means 100% (width).
* `text`: The name of the texture that is displayed.
* `alignment`: The alignment of the image.
* `world_pos`: World position of the waypoint.
* `offset`: offset in pixels from position.
### Particle definition (`add_particle`)
```lua
{
pos = {x=0, y=0, z=0},
velocity = {x=0, y=0, z=0},
acceleration = {x=0, y=0, z=0},
-- ^ Spawn particle at pos with velocity and acceleration
expirationtime = 1,
-- ^ Disappears after expirationtime seconds
size = 1,
collisiondetection = false,
-- ^ collisiondetection: if true collides with physical objects
collision_removal = false,
-- ^ collision_removal: if true then particle is removed when it collides,
-- ^ requires collisiondetection = true to have any effect
vertical = false,
-- ^ vertical: if true faces player using y axis only
texture = "image.png",
-- ^ Uses texture (string)
animation = {Tile Animation definition},
-- ^ optional, specifies how to animate the particle texture
glow = 0
-- ^ optional, specify particle self-luminescence in darkness
}
```
As documented in `lua_api.md`, except for obvious reasons, the `playername` field is not supported.
### `ParticleSpawner` definition (`add_particlespawner`)
```lua
{
amount = 1,
time = 1,
-- ^ If time is 0 has infinite lifespan and spawns the amount on a per-second base
minpos = {x=0, y=0, z=0},
maxpos = {x=0, y=0, z=0},
minvel = {x=0, y=0, z=0},
maxvel = {x=0, y=0, z=0},
minacc = {x=0, y=0, z=0},
maxacc = {x=0, y=0, z=0},
minexptime = 1,
maxexptime = 1,
minsize = 1,
maxsize = 1,
-- ^ The particle's properties are random values in between the bounds:
-- ^ minpos/maxpos, minvel/maxvel (velocity), minacc/maxacc (acceleration),
-- ^ minsize/maxsize, minexptime/maxexptime (expirationtime)
collisiondetection = false,
-- ^ collisiondetection: if true uses collision detection
collision_removal = false,
-- ^ collision_removal: if true then particle is removed when it collides,
-- ^ requires collisiondetection = true to have any effect
vertical = false,
-- ^ vertical: if true faces player using y axis only
texture = "image.png",
-- ^ Uses texture (string)
}
```
As documented in `lua_api.md`, except for obvious reasons, the `playername` field is not supported.