Module `Script`

The unit scripts are organized in.

Scripting is organized in single scripts that can be attached to draft objects. At runtime the script's methods get called at certain points in time and therefore allow the script to run.

Usage:

local x = 0

function script:init()
  Debug.toast('init')
end

function script:update()
  Debug.info(x)
  x = x + 1
end

Event types

EVENT_CAR_DESPAWNED	Will be called for building with car spawner whenever a car was despawned.
EVENT_CAR_REACHED	Will be called for building with car spawner whenever a car reached it's target.
EVENT_CAR_SPAWNED	Will be called for building with car spawner whenever a car was spawned.
EVENT_FINISHED	Will be called for building and road drafts right after construction.
EVENT_PLACED	Will be called for building and road drafts right after placement.
EVENT_REMOVE	Will be called for scripts attached to a building or road the moment before it gets removed.
EVENT_TOOL_ENTER	Will be called for scripts attached to a generic tool when users selects the tool.
EVENT_TOOL_LEAVE	Will be called for scripts attached to a generic tool when users closes the tool.
EVENT_UPGRADE	Will be called for scripts attached to a building after an upgarde of it was finished.

Functions

getScript ()	Returns the current script or nil if no script is running right now.
getScripts ([tag])	Returns an array of all scripts, or, if tag is specified, an array of all scripts that defined the given tag.

Class Script

Script:addScript (name, draft[, initializer])	Adds a script to a draft.
Script:addTag (tag)	Adds a tag to this script.
Script:getDraft ()	Returns the draft the script is attached to.
Script:getId ()	Every script is uniquely identified by a single number.
Script:getLocation ()	Returns a readable location identifier that contains the draft id.
Script:getName ()	Returns the name of the script.
Script:getParent ()	Returns the parent script if there is any, nil otherwise.
Script:getParents ()	Returns an array of all parent scripts.
Script:getPath ()	Returns the relative path of the script.
Script:getTags ()	Returns an array that contains the tags that have been defined for that script.
Script:isActive ()	Determines whether the script is active right now.
Script:setActive (state)	Activates or disables the script.

Event functions

script:buildCityGUI ()	Will be called after the city GUI was built.
script:click (x, y, level)	Will be called when users taps on a building/road of this draft while being in default tool.
script:daily (x, y, level)	Will be called on a daily basis for every building or road that are instances of the owning draft.
script:disable ()	Will be called when this script is about to be disabled.
script:draw (x, y, level)	Will be called after a building/road instance has been drawn.
script:drawCity ()	This event function will be called right after the city was drawn.
script:earlyInit ()	Will be called on all scripts before script:init().
script:earlyTap (tileX, tileY, x, y)	Will be called when the user taps on the map.
script:enable ()	Will be called when this script is about to be enabled.
script:enterCity ()	Will be called when the user enters a city.
script:enterCityGeneration (phase)	Will be called right before a new city is generated.
script:enterStage (name)	Will be called whenever the user enters a stage.
script:event (x, y, level, event, source)	Will be called for building/road/tool events of instances of the owning draft.
script:exit ()	Will be called when the game gets closed.
script:finishInformationDialog (x, y, lvl, dialog)	Gets called after the information dialog for buildings and/or roads was built.
script:init ()	Will be called once after all drafts and scripts have been loaded.
script:isBuildable (x, y, level)	For buildings and roads only: Will be queried to determine if a building/road can be built at a specific location.
script:lateInit ()	Will be called once after script:init() has been called on all scripts.
script:leaveCity ()	Will be called when the user leaves the city.
script:leaveCityGeneration (phase)	Will be called after city generation process was completed.
script:leaveStage ()	Will be called whenever the user leaves a stage.
script:load ()	Will be called after lateInit and when the draft is reloaded after it was unloaded e.g.
script:nextDay ()	Will be called on a daily basis for each script.
script:nextMonth ()	Will be called on a monthly basis for each script.
script:nextYear ()	Will be called on a yearly basis for each script.
script:overlay ()	Will be called once per frame after UI has been drawn.
script:random (x, y)	Will be called every day for scripts whose owning draft is a building or road.
script:save ()	Will be called just before the city is saved.
script:settings ()	Will be called when rebuilding the settings page of the game.
script:tap (tileX, tileY, x, y)	Will be called when the user taps on the map.
script:unload ()	Will be called before the plugin get's unloaded.
script:update ()	Will be called per frame for each script while a city is open.

Event types

EVENT_CAR_DESPAWNED

Will be called for building with car spawner whenever a car was despawned.

EVENT_CAR_REACHED

Will be called for building with car spawner whenever a car reached it's target.

EVENT_CAR_SPAWNED

Will be called for building with car spawner whenever a car was spawned.

EVENT_FINISHED

Will be called for building and road drafts right after construction. That is immediately after placements for roads and for buildings witht zero buildtime.

EVENT_PLACED

Will be called for building and road drafts right after placement.

Functions

getScript ()

Returns the current script or nil if no script is running right now. Since scripts are executed synchronously to avoid race conditions there can only be one script running.

Returns:

script

getScripts ([tag])

Returns an array of all scripts, or, if tag is specified, an array of all scripts that defined the given tag. Don't manipulate the returned array directly.

Parameters:

tag (optional)

Returns:

array

Class Script

Here you see the methods that a script object offers.

Script:addScript (name, draft[, initializer])

Adds a script to a draft. Only call this method in the init or lateInit methods to ensure that it will be executed correctly. However, init and/or lateInit might not be called on the new script automatically. Format of initializer: initializer(script) If no initializer is provided the own initializer will be used. Returns the newly created script.

Parameters:

name string
draft draft
initializer function (optional)

Returns:

script

Script:addTag (tag)

Adds a tag to this script. Tags can be used to find scripts by using getScripts(tag).

Parameters:

Script:getDraft ()

Returns the draft the script is attached to. Every script instance is attached to exactly one draft. However, multiple instances of the same script may be attached to different drafts.

Returns:

draft

Script:getId ()

Every script is uniquely identified by a single number. Note that this identifier is only constant during runtime. It may be different in the next session, therefore you shouldn't rely on it.

Returns:

int

Script:getLocation ()

Returns a readable location identifier that contains the draft id.

Returns:

string

Script:getName ()

Returns the name of the script. E.g. the name of a script

folder/test.lua

is just test.

Returns:

string

Script:getParent ()

Returns the parent script if there is any, nil otherwise. A parent script is the script that instantiated this script using script:addScript() Scripts are usually not instantiated by other scripts.

Returns:

script

Script:getParents ()

Returns an array of all parent scripts.

Returns:

array

Script:getPath ()

Returns the relative path of the script.

Returns:

string

Script:getTags ()

Returns an array that contains the tags that have been defined for that script.

Returns:

array

Script:isActive ()

Determines whether the script is active right now.

Returns:

bool

Script:setActive (state)

Activates or disables the script. No event methods will be called on disabled scripts. A disabled script cannot re-enable itself since it won't be updated anymore.

Parameters:

state bool

Event functions

script:buildCityGUI ()

Will be called after the city GUI was built. When entering the city stage this method will not always be called due to GUI caching.

script:click (x, y, level)

Will be called when users taps on a building/road of this draft while being in default tool. Return false to prevent opening the default tile dialog. You should favor this method over earlyTap() and tap() as they operate indepently of tile dialog and selected tool and don't take the own draft into consideration. This method will also be called for custom tools if user taps on a tile and script:isBuildable() returned true for it.

Parameters:

x number
y number
level number

script:daily (x, y, level)

Will be called on a daily basis for every building or road that are instances of the owning draft. Level is 0 for buildings.

Parameters:

x int
y int
level int

script:disable ()

Will be called when this script is about to be disabled.

script:draw (x, y, level)

Will be called after a building/road instance has been drawn. Will also be called on all visible tiles for custom tools.

Parameters:

x int
y int
level int

script:drawCity ()

This event function will be called right after the city was drawn. If you want to draw something directly on top of the city it's a good idead to do it in here.

script:earlyInit ()

Will be called on all scripts before script:init(). Use this method to set up early things.

script:earlyTap (tileX, tileY, x, y)

Will be called when the user taps on the map. Will be called just before the tap is handled by the current tool.

Parameters:

tileX number
tileY number
x number
y number

script:enable ()

Will be called when this script is about to be enabled. Scripts are enabled by definiton right after their creation so this method won't be called then.

script:enterCity ()

Will be called when the user enters a city.

script:enterCityGeneration (phase)

Will be called right before a new city is generated.

Parameters:

phase number Will be 0 for first pass and 1 for decoration creation

script:enterStage (name)

Will be called whenever the user enters a stage. A stage is for example a city, the settings screen or the gallery.

Parameters:

name string A readable name of the stage.

script:event (x, y, level, event, source)

Will be called for building/road/tool events of instances of the owning draft. Level is 0 for buildings. Be careful not to do any meaningful work when receiving removal event since that could cause cassade enless calling of event functions. Use Runtime.postpone() to prevent that.

Changes:

1.10.07

Parameters:

x int The x location of the event. The targeted building's pivot x location for car related events.
y int Same as x but for y coordinate.
level int The level of the event. The selected car frame for car related events.
event int Event number (see listing above)
source draft The car draft in case of car events, nil otherwise.

New feature:

1.9.80

script:finishInformationDialog (x, y, lvl, dialog)

Gets called after the information dialog for buildings and/or roads was built. Only gets called for buildings/roads this script is attached to.

Parameters:

x number X coordinate of the building or road.
y number Y coordinate of the building or road.
lvl number For roads only: the level of the road.
dialog table A dialog table as it is returned by GUI.createTable(...).

script:init ()

Will be called once after all drafts and scripts have been loaded.

script:isBuildable (x, y, level)

For buildings and roads only: Will be queried to determine if a building/road can be built at a specific location. To prevent buildability just let it return false. Is also queried for custom tools to determine buildability.

Parameters:

x int
y int
level int

script:lateInit ()

Will be called once after script:init() has been called on all scripts. Use this method for things that relay on other scripts' setup.

script:leaveCity ()

Will be called when the user leaves the city. Don't rely on this method to permanently save state since there's no guarantee that this method will be called.

script:leaveCityGeneration (phase)

Will be called after city generation process was completed.

Parameters:

phase

script:leaveStage ()

Will be called whenever the user leaves a stage. A stage is for example a city, the settings screen or the gallery.

script:load ()

Will be called after lateInit and when the draft is reloaded after it was unloaded e.g. for an online mode region that does not allow plugins.

New feature:

1.9.80

script:nextDay ()

Will be called on a daily basis for each script.

script:nextMonth ()

Will be called on a monthly basis for each script.

script:nextYear ()

Will be called on a yearly basis for each script.

script:overlay ()

Will be called once per frame after UI has been drawn. Will also be called outside of cities.

script:random (x, y)

Will be called every day for scripts whose owning draft is a building or road. x and y is a random (valid) postion on the map.

Parameters:

x number
y number

script:save ()

Will be called just before the city is saved.

script:settings ()

Will be called when rebuilding the settings page of the game. Can return a table contains settings items that will then be displayed. See here on how to use it.

script:tap (tileX, tileY, x, y)

Will be called when the user taps on the map. Will be called just after the tap is handled by the current tool.

Parameters:

tileX number
tileY number
x number
y number

script:unload ()

Will be called before the plugin get's unloaded. This happens for example when the user enters a city in online mode that doesn't allow plugins.

New feature:

1.9.80

script:update ()

Will be called per frame for each script while a city is open. Can be used to draw stuff on the screen (under the UI). Use overlay() do draw on top of UI and/or outside of cities.

Lua API

Contents

Modules

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Module Script

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Class Script

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Module `Script`