GameObject

GameObject

GameObject is the base class of all game objects. It is created only for the purpose of clearly defining the game object interface. Game developers will use one of the subclasses such as DynamicObject, or PhysicalObject.

Constructor

new GameObject(gameEngine, options, id)

Creates an instance of a game object.

Parameters:
Name Type Description
gameEngine GameEngine

the gameEngine this object will be used in

options Object

options for instantiation of the GameObject

id Number

if set, the new instantiated object will be set to this id instead of being generated a new one. Use with caution!

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Members

(static) bending :Object

Bending is defined as the amount of error correction that will be applied on the client side to a given object's physical attributes, incrementally, by the time the next server broadcast is expected to arrive.

When this percentage is 0.0, the client always ignores the server object's value. When this percentage is 1.0, the server object's attributes will be applied in full.

The GameObject bending attribute is implemented as a getter, and can provide distinct values for position, velocity, angle, and angularVelocity. And in each case, you can also provide overrides for local objects, these attributes will be called, respectively, positionLocal, velocityLocal, angleLocal, angularVelocityLocal.

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Example
get bending() {
  return {
    position: { percent: 1.0, min: 0.0 },
    velocity: { percent: 0.0, min: 0.0 },
    angularVelocity: { percent: 0.0 },
    angleLocal: { percent: 1.0 }
  }
};

gameEngine :GameEngine

The gameEngine this object will be used in

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id :Number

ID of this object's instance. There are three cases of instance creation which can occur:

  1. In the normal case, the constructor is asked to assign an ID which is unique across the entire game world, including the server and all the clients.
  2. In extrapolation mode, the client may have an object instance which does not yet exist on the server, these objects are known as shadow objects. Their IDs must be allocated from a different range.
  3. Also, temporary objects are created on the client side each time a sync is received. These are used for interpolation purposes and as bending targets of position, velocity, angular velocity, and orientation. In this case the id will be set to null.
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Methods

bendingToString() → {String}

Formatted textual description of the game object's current bending properties.

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Returns:

description - a string description

Type
String

hasComponent(componentClass) → {Boolean}

Check whether this game object has a certain component

Parameters:
Name Type Description
componentClass

the comp

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Returns:

true if the gameObject contains this component

Type
Boolean

onAddToWorld(gameEngine)

Called after the object is added to to the game world. This is the right place to add renderer sub-objects, physics sub-objects and any other resources that should be created

Parameters:
Name Type Description
gameEngine GameEngine

the game engine

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onRemoveFromWorld(gameEngine)

Called after the object is removed from game-world. This is where renderer sub-objects and any other resources should be freed

Parameters:
Name Type Description
gameEngine GameEngine

the game engine

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syncTo(other)

synchronize this object to the state of an other object, by copying all the netscheme variables. This is used by the synchronizer to create temporary objects, and must be implemented by all sub-classes as well.

Parameters:
Name Type Description
other GameObject

the other object to synchronize to

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toString() → {String}

Formatted textual description of the game object.

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Returns:

description - a string description

Type
String