ufo_util¶

Source: base/tealdef/game_mechanics/fun_elements/ufo_util.d.tl

Notes

UFO that flies in, abducts a cow from a livestock farm and leaves.

UfoUtil¶

record global base/tealdef/game_mechanics/fun_elements/ufo_util.d.tl:3

global record UfoUtil

Notes

UFO that flies in from the map edge, lifts a cow from a livestock farm field and flies off again.

Details

The fun elements game script spawns one every 2 to 4 game years while no other UFO is in flight.

Functions

spawnNew(callback : function(UfoData)) : boolean base/tealdef/game_mechanics/fun_elements/ufo_util.d.tl:21

Notes

Spawns a cow on a random cow field of a livestock farm and a UFO at the nearest map edge.

Parameter	Type	Description
`callback`	`function(UfoData)`	Receives the UFO's data once both entities exist.

Returns boolean: False if no livestock farm with cows exists.

update(data : UfoData, dt : number) : boolean base/tealdef/game_mechanics/fun_elements/ufo_util.d.tl:22

Notes

Moves the UFO (or the cow during the abduction) one step and advances the flight stage.

Parameter	Type	Description
`data`	`UfoData`	UFO to update; changed in place.
`dt`	`number`	Time step in seconds.

Returns boolean: True when the UFO was removed and its data can be dropped.

enum base/tealdef/game_mechanics/fun_elements/ufo_util.d.tl:4

enum UfoState

Notes

Flight stage of a UFO.

Value	Description
`"Approach"`	Flying from the map edge towards the farm.
`"Target"`	Slowing down to hover 25 metres above the cow.
`"Abduct"`	Lifting the cow.
`"Leave"`	Flying to the nearest map edge after the cow is gone.
`"Despawn"`	Shrunk at the map edge; removed on the next update.

record base/tealdef/game_mechanics/fun_elements/ufo_util.d.tl:12

record UfoData

Notes

Saved state of one UFO.

Used in the base game: 4 times in 2 files

base/content/game_mechanics/game_mechanics/fun_elements/ufo_util.tl:65

ufoUtil.spawnNew = function(callback:function(UfoUtil.UfoData)) : boolean

base/content/game_mechanics/game_mechanics/fun_elements/fun_elements.script.tl:45

ufo_util.spawnNew(function(ufoData : UfoUtil.UfoData)

Fields

Name	Type	Description
`ufoEntity`	`EntityUtil.EntityAndRevision`	UFO entity.
`cowEntity`	`EntityUtil.EntityAndRevision`	Cow entity; empty after the abduction.
`state`	`UfoState`	Current flight stage.
`velocity`	`{number}`	Velocity as `{x, y, z}` in metres per second.
`target`	`{number}`	Current target position as `{x, y, z}`.
`abductSpeed`	`number`	Speed at which the cow rises, up to 6 metres per second.