Class Entity

This class represents a game entity, essentially a container of Component types, which provide the actual game logic. Entity types are contained in Scene types, which handle how to update and draw them.

Inheritance

object

Entity

Implements

IDependencyObject

Inherited Members

PrefabInstanceObject.PrefabSource

PrefabInstanceObject.PrefabElementId

PrefabInstanceObject.IsPrefabInstance

PrefabInstanceObject.IsMissingPrefabSource

AttachableObject.AttachableStateChanged

AttachableObject.IsEnabled

AttachableObject.State

AttachableObject.IsLoaded

AttachableObject.IsAttached

AttachableObject.IsActivated

AttachableObject.IsStarted

AttachableObject.IsDestroyed

AttachableObject.Destroy()

AttachableObject.DependencyBroken()

DependencyObject.Dependencies

DependencyObject.OnDependencyRemoved

IdentifiableObject.Id

Namespace: Evergine.Framework

Assembly: Evergine.Framework.dll

Syntax

public class Entity : PrefabInstanceObject, IDependencyObject

Remarks

Entity types can be organized in trees, with one entity containing others, and so on.

Examples

This is an example of how to create an Entity. Keep in mind that the AddComponent() and RemoveComponent() methods are designed to allow method chaining, so this type of code can be written when creating or configuring an Entity:

var primitive = new Entity("Primitive")
                    .AddComponent(new Transform3D())
                    .AddComponent(new Spinner() { AxisTotalIncreases = new Vector3(0.01f, 0.02f, 0.01f) })
                    .AddComponent(new CubeMesh())
                    .AddComponent(new MeshRenderer())
                    .AddComponent(new MaterialComponent() { Material = myMaterial });

Recipes and samples.

[Component-based Architecture recipe](../recipes/Basic/Component-based-Architecture.md)

Constructors

Entity()

Initializes a new instance of the Entity class. By default, the Entity is visible and active.

Declaration

public Entity()

Entity(string)

Initializes a new instance of the Entity class. By default, the Entity is visible and active.

Declaration

public Entity(string name)

Parameters

Type	Name	Description
string	name	The name of the entity.

Exceptions

Type	Condition
ArgumentNullException	Thrown if the name is null or empty.

Fields

Flags

Special entity behavior flags.

Declaration

public HideFlags Flags

Field Value

Type	Description
HideFlags

InvalidEntityNameStrings

Strings that are not valid in an entity name.

Declaration

public static readonly string[] InvalidEntityNameStrings

Field Value

Type	Description
string[]

IsUpdatingPrefab

Indicates whether the prefab is being updated.

Declaration

public bool IsUpdatingPrefab

Field Value

Type	Description
bool

PathParent

The separator string.

Declaration

public static readonly string PathParent

Field Value

Type	Description
string

PathSelf

The separator string.

Declaration

public static readonly string PathSelf

Field Value

Type	Description
string

PathSeparatorChar

The separator character used in the EntityPath property.

Declaration

public static readonly char PathSeparatorChar

Field Value

Type	Description
char

PathSeparatorString

The separator string.

Declaration

public static readonly string PathSeparatorString

Field Value

Type	Description
string

Properties

ChildEntities

Gets the child Entity instances of this instance.

Declaration

public IEnumerable<Entity> ChildEntities { get; }

Property Value

Type	Description
IEnumerable<Entity>

Components

Gets the Component collection of this instance.

Declaration

public IEnumerable<Component> Components { get; }

Property Value

Type	Description
IEnumerable<Component>

EntityManager

Gets the EntityManager which contains this instance.

Declaration

public EntityManager EntityManager { get; }

Property Value

Type	Description
EntityManager

EntityPath

Gets the Entity path. The entity path is a string that conforms to the path in the EntityManager to obtain the instance.

Declaration

public string EntityPath { get; }

Property Value

Type	Description
string

IsPrefabInstanceRoot

Gets a value indicating whether this entity is the root of a prefab instance.

Declaration

public bool IsPrefabInstanceRoot { get; }

Property Value

Type	Description
bool

IsStatic

Gets or sets a value indicating whether this instance is static. Once an entity is initialized, it cannot be displaced, rotated, or scaled.

Declaration

public bool IsStatic { get; set; }

Property Value

Type	Description
bool	`true` if this instance is static; otherwise, `false`.

Name

Gets or sets the name of the instance.

Declaration

public string Name { get; set; }

Property Value

Type	Description
string

NumChildren

Gets the number of children Entity actually contained in this instance.

Declaration

public int NumChildren { get; }

Property Value

Type	Description
int

Parent

Gets or sets the parent Entity.

Declaration

public Entity Parent { get; set; }

Property Value

Type	Description
Entity

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

Scene

Gets the Scene that contains this instance.

Declaration

public Scene Scene { get; }

Property Value

Type	Description
Scene

ShouldBeActivated

Gets a value indicating whether this object should be activated.

Declaration

protected override bool ShouldBeActivated { get; }

Property Value

Type	Description
bool

Overrides

AttachableObject.ShouldBeActivated

Tag

Gets or sets the tag of the instance.

Declaration

public string Tag { get; set; }

Property Value

Type	Description
string

Methods

AddChild(Entity)

Adds a child Entity to this instance.

Declaration

public Entity AddChild(Entity entity)

Parameters

Type	Name	Description
Entity	entity	The Entity to add.

Returns

Type	Description
Entity	This instance.

Remarks

The method returns this instance. It can be used with method chaining, making consecutive operations on the same instance simpler.

Exceptions

Type	Condition
ArgumentNullException	If the entity is null.
InvalidOperationException	If the entity is added to itself.
InvalidOperationException	If the entity is already added to another Entity.
InvalidOperationException	If an Entity with the same name as the entity is already added to this instance.

AddComponent(Component)

Adds a Component to this instance.

Declaration

public Entity AddComponent(Component component)

Parameters

Type	Name	Description
Component	component	The Component to add.

Returns

Type	Description
Entity	This instance.

Remarks

The method returns this instance. It can be used with method chaining, making it simpler to perform consecutive operations on the same instance.

Exceptions

Type	Condition
ArgumentException	If component is null.
InvalidOperationException	If component was already added to another Entity.
InvalidOperationException	If a Component of the same type as the component was already added to this instance.

DetachChild(Entity)

Detaches the child Entity.

Declaration

public Entity DetachChild(Entity entity)

Parameters

Type	Name	Description
Entity	entity	The name of the entity.

Returns

Type	Description
Entity	The detached entity, or null otherwise.

Exceptions

Type	Condition
ArgumentNullException	If the entity is null or empty.

DetachChild(Guid)

Detaches the child Entity.

Declaration

public Entity DetachChild(Guid id)

Parameters

Type	Name	Description
Guid	id	ID of the entity.

Returns

Type	Description
Entity	The entity, if detached, or null otherwise.

Exceptions

Type	Condition
ArgumentNullException	Thrown if entityName is null or empty.

DetachChild(string)

Detaches the child Entity.

Declaration

public Entity DetachChild(string childName)

Parameters

Type	Name	Description
string	childName	Name of the child Entity.

Returns

Type	Description
Entity	The entity detached or null otherwise.

Exceptions

Type	Condition
ArgumentNullException	If childName is null or empty.

DetachComponent(Component)

Removes a Component from this instance.

Declaration

public Entity DetachComponent(Component component)

Parameters

Type	Name	Description
Component	component	The component to remove.

Returns

Type	Description
Entity	This instance.

Remarks

The method returns this instance and can be used with method chaining, making it easier to perform consecutive operations on the same instance.

Exceptions

Type	Condition
ObjectDisposedException	The entity is disposed.
NullReferenceException	componentType or component is null.

DetachComponent(Type, out Component, bool)

Removes a Component from this instance.

Declaration

public Entity DetachComponent(Type componentType, out Component detachedComponent, bool isExactType = true)

Parameters

Type	Name	Description
Type	componentType	Type of the component.
Component	detachedComponent	The detached component instance.
bool	isExactType	If set to `true`, the type must match exactly.

Returns

Type	Description
Entity	This instance.

Remarks

The method returns this instance. It can be used with method chaining, so performing consecutive operations on the same instance is simpler.

Exceptions

Type	Condition
ObjectDisposedException	The entity is disposed.
NullReferenceException	componentType or componentType is null.

DetachComponent<T>(out T, bool)

Removes a Component from this instance.

Declaration

public Entity DetachComponent<T>(out T detachedComponent, bool isExactType = true) where T : Component

Parameters

Type	Name	Description
T	detachedComponent	The detached component instance.
bool	isExactType	If set to `true`, indicates an exact type match.

Returns

Type	Description
Entity	This instance.

Type Parameters

Name	Description
T	Type of the Component to remove.

Remarks

The method returns this instance. It can be used with method chaining, making it simpler to perform consecutive operations on the same instance.

Find(string)

Finds the first child Entity in this instance with a given entity path.

Declaration

public Entity Find(string entityPath)

Parameters

Type	Name	Description
string	entityPath	The path to the entity.

Returns

Type	Description
Entity	The entity at the path.

FindChild(Guid, bool)

Finds a child Entity in this instance by an id.

Declaration

public Entity FindChild(Guid id, bool isRecursive = false)

Parameters

Type	Name	Description
Guid	id	Id of the child Entity.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include the direct descendants.

Returns

Type	Description
Entity	The searched child Entity, or null if no matching child was found.

Exceptions

Type	Condition
ArgumentNullException	If id is null or empty.

FindChild(string, bool)

Finds the first child Entity in this instance with a given name.

Declaration

public Entity FindChild(string entityName, bool isRecursive = false)

Parameters

Type	Name	Description
string	entityName	Name of the child Entity.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include the direct descendants.

Returns

Type	Description
Entity	The searched child Entity, or null if no matching child is found.

Exceptions

Type	Condition
ArgumentNullException	If entityName is null or empty.

FindChildrenByTag(string, bool, bool)

Finds children Entity in this instance by Tag.

Declaration

public IEnumerable<Entity> FindChildrenByTag(string tag, bool isRecursive = false, bool skipOwner = true)

Parameters

Type	Name	Description
string	tag	The tag to filter.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include the direct descendants.
bool	skipOwner	Ignores the owner entity.

Returns

Type	Description
IEnumerable<Entity>	A collection of Entity with all children that match the specified Tag.

Exceptions

Type	Condition
ArgumentNullException	Thrown if tag is null or empty.

FindComponent(Type, bool, string)

Finds a Component in this instance with the specified type.

Declaration

public Component FindComponent(Type type, bool isExactType = true, string tag = null)

Parameters

Type	Name	Description
Type	type	The type of the Component to find.
bool	isExactType	Whether to match the exact type.
string	tag	Filters entities by this tag.

Returns

Type	Description
Component	The Component, or null if no Component with the specified type is found.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponentInChildren(Type, bool, string, bool, bool)

Finds a Component in this instance or any of its children with the specified type using depth-first search.

Declaration

public Component FindComponentInChildren(Type type, bool isExactType = true, string tag = null, bool skipOwner = false, bool isRecursive = true)

Parameters

Type	Name	Description
Type	type	The type of the Component to find.
bool	isExactType	Whether to match the exact type.
string	tag	Filters entities by this tag.
bool	skipOwner	Indicates whether the owner is included in the search.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include the direct descendants.

Returns

Type	Description
Component	The Component or null if no Component with the specified type was found.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponentInChildren<T>(bool, string, bool, bool)

Finds a Component in this instance or any of its children with the specified type using depth-first search.

Declaration

public T FindComponentInChildren<T>(bool isExactType = true, string tag = null, bool skipOwner = false, bool isRecursive = true) where T : Component

Parameters

Type	Name	Description
bool	isExactType	Whether to match the exact type.
string	tag	Filter entities by this tag.
bool	skipOwner	Indicates whether the owner is included in the search.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include direct descendants.

Returns

Type	Description
T	The Component or null if no Component with the specified type was found.

Type Parameters

Name	Description
T	The type of the Component to find.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponentInParents(Type, bool, string, bool, bool)

Finds a Component in any of the parents of this instance with the specified type using depth-first search.

Declaration

public Component FindComponentInParents(Type type, bool isExactType = true, string tag = null, bool skipOwner = false, bool isRecursive = true)

Parameters

Type	Name	Description
Type	type	The type of the Component to find.
bool	isExactType	Whether to match the exact type.
string	tag	Filter entities by this tag.
bool	skipOwner	Indicates whether the owner is included in the search.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include the direct descendants.

Returns

Type	Description
Component	The Component or null if no Component with the specified type was found.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponentInParents<T>(bool, string, bool, bool)

Finds a Component in any of the parents of this instance with the specified type using depth-first search.

Declaration

public T FindComponentInParents<T>(bool isExactType = true, string tag = null, bool skipOwner = false, bool isRecursive = true) where T : Component

Parameters

Type	Name	Description
bool	isExactType	Whether to match the exact type.
string	tag	Filter entities by this tag.
bool	skipOwner	Indicates whether the owner is included in the search.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include the direct descendants.

Returns

Type	Description
T	The Component or null if no Component with the specified type is found.

Type Parameters

Name	Description
T	The type of the Component to find.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponent<T>(bool, string)

Finds a Component in this instance with the specified type.

Declaration

public T FindComponent<T>(bool isExactType = true, string tag = null) where T : Component

Parameters

Type	Name	Description
bool	isExactType	Whether to match the exact type.
string	tag	Filters entities by this tag.

Returns

Type	Description
T	The Component or null if no Component with the specified type is found.

Type Parameters

Name	Description
T	The type of the Component to find.

Exceptions

Type	Condition
ObjectDisposedException	The entity has been disposed.

FindComponents(Type, bool, string)

Finds a Component collection in this instance with the specified type.

Declaration

public IEnumerable<Component> FindComponents(Type type, bool isExactType = true, string tag = null)

Parameters

Type	Name	Description
Type	type	The type of the Component to find.
bool	isExactType	Whether to match the exact type.
string	tag	Filters entities by this tag.

Returns

Type	Description
IEnumerable<Component>	The Component or null if no Component with the specified type was found.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponentsInChildren(Type, bool, string, bool, bool)

Finds a Component collection in this instance or any of its children with the specified type.

Declaration

public IEnumerable<Component> FindComponentsInChildren(Type type, bool isExactType = true, string tag = null, bool skipOwner = false, bool isRecursive = true)

Parameters

Type	Name	Description
Type	type	The type of the Component to find.
bool	isExactType	Whether to match the exact type.
string	tag	Filter entities by this tag.
bool	skipOwner	Indicates whether the owner is excluded from the search.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include the direct descendants.

Returns

Type	Description
IEnumerable<Component>	The Component or null if no Component with the specified type is found.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponentsInChildren<T>(bool, string, bool, bool)

Finds a Component collection in this instance or any of its children with the specified type.

Declaration

public IEnumerable<T> FindComponentsInChildren<T>(bool isExactType = true, string tag = null, bool skipOwner = false, bool isRecursive = true) where T : Component

Parameters

Type	Name	Description
bool	isExactType	Whether to match the exact type.
string	tag	Filter entities by this tag.
bool	skipOwner	Indicates whether the owner is included in the search.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include the direct descendants.

Returns

Type	Description
IEnumerable<T>	The Component or null if no Component with the specified type was found.

Type Parameters

Name	Description
T	The type of the Component to find.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponentsInParents(Type, bool, string, bool, bool)

Finds a Component collection in this instance or any of its parents with the specified type.

Declaration

public IEnumerable<Component> FindComponentsInParents(Type type, bool isExactType = true, string tag = null, bool skipOwner = false, bool isRecursive = true)

Parameters

Type	Name	Description
Type	type	The type of the Component to find.
bool	isExactType	Whether to match the exact type.
string	tag	Filters entities by this tag.
bool	skipOwner	Indicates whether the owner is included in the search.
bool	isRecursive	If set to `true`, the search will include all ascendants of the hierarchy; otherwise, the search will only include the direct ascendant.

Returns

Type	Description
IEnumerable<Component>	The Component or null if no Component with the specified type was found.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponentsInParents<T>(bool, string, bool, bool)

Finds a Component collection in this instance or any of its parents with the specified type.

Declaration

public IEnumerable<T> FindComponentsInParents<T>(bool isExactType = true, string tag = null, bool skipOwner = false, bool isRecursive = true) where T : Component

Parameters

Type	Name	Description
bool	isExactType	Whether to match the exact type.
string	tag	Filters entities by this tag.
bool	skipOwner	Indicates whether the owner is included in the search.
bool	isRecursive	If set to `true`, the search will include all ascendants of the hierarchy; otherwise, the search will only include the direct ascendant.

Returns

Type	Description
IEnumerable<T>	The Component or null if no Component with the specified type was found.

Type Parameters

Name	Description
T	The type of the Component to find.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindComponents<T>(bool, string)

Finds a Component collection in this instance with the specified type.

Declaration

public IEnumerable<T> FindComponents<T>(bool isExactType = true, string tag = null) where T : Component

Parameters

Type	Name	Description
bool	isExactType	Whether to match the exact type.
string	tag	Filters entities by this tag.

Returns

Type	Description
IEnumerable<T>	The Component or null if no Component with the specified type is found.

Type Parameters

Name	Description
T	The type of the Component to find.

Exceptions

Type	Condition
ObjectDisposedException	Entity has been disposed.

FindParentsByTag(string, bool, bool)

Finds children Entity in this instance by Tag.

Declaration

public IEnumerable<Entity> FindParentsByTag(string tag, bool isRecursive = false, bool skipOwner = true)

Parameters

Type	Name	Description
string	tag	The tag to filter by.
bool	isRecursive	If set to `true`, the search will include all descendants of the hierarchy; otherwise, the search will only include the direct descendants.
bool	skipOwner	Specifies whether to ignore the owner entity.

Returns

Type	Description
IEnumerable<Entity>	A collection of Entity containing all children that match the specified tag.

Exceptions

Type	Condition
ArgumentNullException	Thrown if tag is null or empty.

IdHasChanged(Guid)

The ID of the object has been updated.

Declaration

protected override void IdHasChanged(Guid oldId)

Parameters

Type	Name	Description
Guid	oldId	The old ID value.

Overrides

IdentifiableObject.IdHasChanged(Guid)

IsValidName(string)

Checks an entity name.

Declaration

public static bool IsValidName(string name)

Parameters

Type	Name	Description
string	name	The entity name.

Returns

Type	Description
bool	Whether it is valid or not.

NextDefaultName()

Returns a default entity name.

Declaration

public static string NextDefaultName()

Returns

Type	Description
string	The entity name.

OnActivated()

Invoked when the object is activated once it is attached.

Declaration

protected override void OnActivated()

Overrides

AttachableObject.OnActivated()

OnAttached()

Invoked when the object is attached to the system.

Declaration

protected override bool OnAttached()

Returns

Type	Description
bool	True if everything is OK.

Overrides

AttachableObject.OnAttached()

OnDeactivated()

Invoked when the object is deactivated.

Declaration

protected override void OnDeactivated()

Overrides

AttachableObject.OnDeactivated()

OnDestroy()

Invoked when the object is about to be disposed.

Declaration

protected override void OnDestroy()

Overrides

AttachableObject.OnDestroy()

OnDetach()

Invoked when the object is detached.

Declaration

protected override void OnDetach()

Overrides

AttachableObject.OnDetach()

OnLoaded()

Invoked when the object is loaded.

Declaration

protected override void OnLoaded()

Overrides

AttachableObject.OnLoaded()

ReattachComponents()

Reattaches all components.

Declaration

public void ReattachComponents()

RefreshPrefab(Prefab)

Handles the prefab source update.

Declaration

protected override void RefreshPrefab(Prefab newValue)

Parameters

Type	Name	Description
Prefab	newValue

Overrides

PrefabInstanceObject.RefreshPrefab(Prefab)

RemoveAllComponentsOfType(Type, bool)

Removes all components of the specified type from this instance.

Declaration

public Entity RemoveAllComponentsOfType(Type componentType, bool isExactType = true)

Parameters

Type	Name	Description
Type	componentType	Type of the component.
bool	isExactType	If set to `true`, the exact type is used.

Returns

Type	Description
Entity	This instance.

Remarks

This method returns this instance. It can be used with method chaining, making consecutive operations on the same instance simpler.

Exceptions

Type	Condition
ObjectDisposedException	The entity is disposed.
NullReferenceException	componentType is null.

RemoveAllComponentsOfType<T>(bool)

Removes all components of the specified type from this instance.

Declaration

public Entity RemoveAllComponentsOfType<T>(bool isExactType = true) where T : Component

Parameters

Type	Name	Description
bool	isExactType	If set to `true`, the exact type is used.

Returns

Type	Description
Entity	This instance.

Type Parameters

Name	Description
T	The exact type of the Component to find.

Remarks

This method returns this instance. It can be used with method chaining, making consecutive operations on the same instance simpler.

Exceptions

Type	Condition
ObjectDisposedException	The entity is disposed.
NullReferenceException	componentType is null.

RemoveChild(Entity)

Removes a child Entity from this instance.

Declaration

public Entity RemoveChild(Entity entity)

Parameters

Type	Name	Description
Entity	entity	The Entity to remove.

Returns

Type	Description
Entity	This instance.

Remarks

The method returns this instance, allowing method chaining for simpler consecutive operations on the same instance.

Exceptions

Type	Condition
ArgumentNullException	If the entity is null.

RemoveChild(Guid)

Removes a child Entity from this instance.

Declaration

public Entity RemoveChild(Guid id)

Parameters

Type	Name	Description
Guid	id	ID of the child Entity.

Returns

Type	Description
Entity	This instance.

Remarks

This method returns this instance. It can be used with method chaining, making it simpler to perform consecutive operations on the same instance.

Exceptions

Type	Condition
ArgumentNullException	If entityName is null or empty.

RemoveChild(string)

Removes a child Entity from this instance.

Declaration

public Entity RemoveChild(string childName)

Parameters

Type	Name	Description
string	childName	Name of the child Entity.

Returns

Type	Description
Entity	This instance.

Remarks

The method returns this instance. It can be used with method chaining, making it simpler to perform consecutive operations on the same instance.

Exceptions

Type	Condition
ArgumentNullException	If childName is null or empty.

RemoveComponent(Component)

Removes a Component from this instance.

Declaration

public Entity RemoveComponent(Component component)

Parameters

Type	Name	Description
Component	component	The component to remove.

Returns

Type	Description
Entity	This instance.

Remarks

The method returns this instance. It can be used with method chaining, making performing consecutive operations on the same instance simpler.

Exceptions

Type	Condition
ObjectDisposedException	The entity is disposed.
NullReferenceException	component is null.

RemoveComponent(Type, bool)

Removes a Component from this instance.

Declaration

public Entity RemoveComponent(Type componentType, bool isExactType = true)

Parameters

Type	Name	Description
Type	componentType	Type of the component.
bool	isExactType	If set to `true`, the exact type is required.

Returns

Type	Description
Entity	This instance.

Remarks

This method returns this instance. It can be used with method chaining, making consecutive operations over the same instance simpler.

Exceptions

Type	Condition
ObjectDisposedException	The entity is disposed.
NullReferenceException	componentType is null.

RemoveComponent<T>(bool)

Removes a Component from this instance.

Declaration

public Entity RemoveComponent<T>(bool isExactType = true) where T : Component

Parameters

Type	Name	Description
bool	isExactType	If set to `true`, checks for the exact type.

Returns

Type	Description
Entity	This instance.

Type Parameters

Name	Description
T	Type of the Component to remove.

Remarks

The method returns this instance, enabling method chaining to simplify performing consecutive operations on the same instance.

Start()

Invoked to start the object.

Declaration

protected override void Start()

Overrides

AttachableObject.Start()

ToString()

Returns a string that represents this instance (its name).

Declaration

public override string ToString()

Returns

Type	Description
string	A string that represents this instance (its name).

Overrides

object.ToString()

TryGetChildById(Guid, out Entity)

Gets the child entity with the specified id.

Declaration

public bool TryGetChildById(Guid entityId, out Entity childEntity)

Parameters

Type	Name	Description
Guid	entityId	The id of the entity to get.
Entity	childEntity	When this method returns, contains the value associated with the specified key, if the key is found; otherwise, the default value for the type of the value parameter. This parameter is passed uninitialized.

Returns

Type	Description
bool	true if this Entity contains a child with the specified id; otherwise, false.

Exceptions

Type	Condition
ArgumentNullException	Thrown if the entity name is null.

TryGetChildByName(string, out Entity)

Gets the first child entity with the specified name.

Declaration

public bool TryGetChildByName(string entityName, out Entity childEntity)

Parameters

Type	Name	Description
string	entityName	The name of the entity to get.
Entity	childEntity	When this method returns, contains the value associated with the specified key, if the key is found; otherwise, the default value for the type of the value parameter. This parameter is passed uninitialized.

Returns

Type	Description
bool	true if this Entity contains the first child with the specified name; otherwise, false.

Exceptions

Type	Condition
ArgumentNullException	The entity name is null.

Events

CheckValidName

Occurs when a valid name is assigned to an entity.

Declaration

public event EventHandler<ValidNameEventArgs> CheckValidName

Event Type

Type	Description
EventHandler<ValidNameEventArgs>

ChildAdded

Occurs when an Entity is added as a child of this entity.

Declaration

public event EventHandler<Entity> ChildAdded

Event Type

Type	Description
EventHandler<Entity>

ChildDetached

Occurs when an Entity child is detached from this entity.

Declaration

public event EventHandler<Entity> ChildDetached

Event Type

Type	Description
EventHandler<Entity>

ChildOrderChanged

Occurs when a child order of an Entity has been changed.

Declaration

public event EventHandler<Entity> ChildOrderChanged

Event Type

Type	Description
EventHandler<Entity>

ComponentAdded

Occurs when a Component is added to this entity.

Declaration

public event EventHandler<Component> ComponentAdded

Event Type

Type	Description
EventHandler<Component>

ComponentDetached

Occurs when a Component is detached from this entity.

Declaration

public event EventHandler<Component> ComponentDetached

Event Type

Type	Description
EventHandler<Component>

NameChanged

Occurs when the entity's name changes.

Declaration

public event EventHandler<NameEventArgs> NameChanged

Event Type

Type	Description
EventHandler<NameEventArgs>

TagChanged

Fired when the entity tag is changed.

Declaration

public event EventHandler<ValueChanged<string>> TagChanged

Event Type

Type	Description
EventHandler<ValueChanged<string>>

Implements

IDependencyObject

Extension Methods

EntityHierarchyExtensions.MoveEntityAfter(Entity, Guid, Guid?)

EntityHierarchyExtensions.MoveEntityBefore(Entity, Guid, Guid?)

ReflectionHelper.GetMemberAssembly(object)

ReflectionHelper.GetTypeName(object)