Difference between revisions of "Oolite JavaScript Reference: Entity"
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=== Stale References === | === Stale References === | ||
| − | When an entity dies or is otherwise removed from the game universe (for instance, because player jumped from the system), existing <code>Entity</code> variables referring to the entity become invalid; all their properties become <code>undefined</code>, and their methods do nothing. In addition to the undefined properties, this can be detected with the <code>[[# | + | When an entity dies or is otherwise removed from the game universe (for instance, because player jumped from the system), existing <code>Entity</code> variables referring to the entity become invalid; all their properties become <code>undefined</code>, and their methods do nothing. In addition to the undefined properties, this can be detected with the <code>[[#isValid|isValid]]</code> property. |
== Properties == | == Properties == | ||
Revision as of 19:44, 17 June 2010
Prototype: Object
Subtypes: Planet, Ship, Sun
The Entity class represents an object in the game universe. Ships, Stations, Planets and the Playerare types of entity. Note that these more specific types have additional properties and methods.
Contents
Stale References
When an entity dies or is otherwise removed from the game universe (for instance, because player jumped from the system), existing Entity variables referring to the entity become invalid; all their properties become undefined, and their methods do nothing. In addition to the undefined properties, this can be detected with the isValid property.
Properties
distanceTravelled
distanceTravelled : Number (read-only)
The distance the entity has travelled since being spawned, in game metres.
energy
energy : Number (read/write)
The entity’s total energy; ranges from 0 to maxEnergy.
heading
heading : Vector (read-only)
The heading of the entity. This is equivalent to orientation, but ignoring the axial twist component (roll in the case of a ship).
entity.heading() is equivalent to entity.orientation.forwardVector().
mass
mass : Number (read-only)
The mass of the entity. Currently, this is directly proportional to the volume.
maxEnergy
maxEnergy : Number (read-only)
The highest permissible value of energy.
orientation
orientation : Quaternion (read/write)
See Also: setOrientation()
owner
owner : Entity (read-only)
The entity which owns this one. In the case of a subentity, the entity to which it is attached. In the case of a defense ship, the station it belongs to. In the case of a missile, the ship that launched it. There may be other uses.
position
position : Vector (read/write)
See Also: setPosition()
scanClass
scanClass : String (read-only)
The current scan class of the entity (such as “CLASS_NEUTRAL” and “CLASS_CARGO”).
spawnTime
spawnTime : Number (read-only)
The time at which the entity came into existence.
status
status : String (read-only)
The current status of the entity (such as “STATUS_IN_FLIGHT” and “STATUS_BEING_SCOOPED”).
isPlanet
isPlanet : Boolean (read-only)
true if the entity is a Planet, false otherwise.
isPlayer
isPlayer : Boolean (read-only)
true if the entity is the Player, false otherwise.
isShip
isShip : Boolean (read-only)
true if the entity is a Ship, false otherwise.
isStation
isStation : Boolean (read-only)
true if the entity is a Station, false otherwise.
isSubEntity
isSubEntity : Boolean (read-only)
true if the entity is a subentity, false otherwise. A subentity’s owner can be acquired through the owner property.
isSun
isSun : Boolean (read-only)
true if the entity is a Sun, false otherwise.
isValid
isValid : Boolean (read-only)
true if the entity is a valid entity variable, false if it is stale.
