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useParent

useParent フックは React コンポーネント内から親の Entity にアクセスする手段を提供します。親 Entity と対話する必要があるコンポーネントに不可欠です。

基本的な使い方​

import { useParent } from '@playcanvas/react/hooks'

function MyComponent() {
  const parent = useParent()
  
  // 親 Entity のプロパティにアクセス
  console.log('Parent name:', parent.name)
  console.log('Parent position:', parent.position)
  
  return null
}

戻り値​

NameTypeDefault
anim
AnimComponent | undefined
Gets the AnimComponent attached to this entity.
-
animation
AnimationComponent | undefined
Gets the AnimationComponent attached to this entity.
-
audiolistener
AudioListenerComponent | undefined
Gets the AudioListenerComponent attached to this entity.
-
button
ButtonComponent | undefined
Gets the ButtonComponent attached to this entity.
-
camera
CameraComponent | undefined
Gets the CameraComponent attached to this entity.
-
collision
CollisionComponent | undefined
Gets the CollisionComponent attached to this entity.
-
element
ElementComponent | undefined
Gets the ElementComponent attached to this entity.
-
gsplat
GSplatComponent | undefined
Gets the GSplatComponent attached to this entity.
-
layoutchild
LayoutChildComponent | undefined
Gets the LayoutChildComponent attached to this entity.
-
layoutgroup
LayoutGroupComponent | undefined
Gets the LayoutGroupComponent attached to this entity.
-
light
LightComponent | undefined
Gets the LightComponent attached to this entity.
-
model
ModelComponent | undefined
Gets the ModelComponent attached to this entity.
-
particlesystem
ParticleSystemComponent | undefined
Gets the ParticleSystemComponent attached to this entity.
-
render
RenderComponent | undefined
Gets the RenderComponent attached to this entity.
-
rigidbody
RigidBodyComponent | undefined
Gets the RigidBodyComponent attached to this entity.
-
screen
ScreenComponent | undefined
Gets the ScreenComponent attached to this entity.
-
script
ScriptComponent | undefined
Gets the ScriptComponent attached to this entity.
-
scrollbar
ScrollbarComponent | undefined
Gets the ScrollbarComponent attached to this entity.
-
scrollview
ScrollViewComponent | undefined
Gets the ScrollViewComponent attached to this entity.
-
sound
SoundComponent | undefined
Gets the SoundComponent attached to this entity.
-
sprite
SpriteComponent | undefined
Gets the SpriteComponent attached to this entity.
-
_app
any
-
_guid
any
-
addComponent
(type: string, data?: object | undefined) => Component | null
Create a new component and add it to the entity. Use this to add functionality to the entity like rendering a model, playing sounds and so on.
-
removeComponent
(type: string) => void
Remove a component from the Entity.
-
findComponent
(type: string) => Component
Search the entity and all of its descendants for the first component of specified type.
-
findComponents
(type: string) => Component[]
Search the entity and all of its descendants for all components of specified type.
-
findScript
(nameOrType: string | typeof ScriptType) => ScriptType | undefined
Search the entity and all of its descendants for the first script instance of specified type.
-
findScripts
(nameOrType: string | typeof ScriptType) => ScriptType[]
Search the entity and all of its descendants for all script instances of specified type.
-
_onHierarchyStatePostChanged
any
-
findByGuid
(guid: string) => Entity | null
Find a descendant of this entity with the GUID.
-
clone
() => Entity
Create a deep copy of the Entity. Duplicate the full Entity hierarchy, with all Components and all descendants. Note, this Entity is not in the hierarchy and must be added manually.
-
_getSortedComponents
() => Component[]
-
_cloneRecursively
any
-
name
string
The non-unique name of a graph node. Defaults to 'Untitled'.
-
tags
Tags
Interface for tagging graph nodes. Tag based searches can be performed using the findByTag function.
-
localPosition
any
-
localRotation
any
-
localScale
any
-
localEulerAngles
any
-
position
any
-
rotation
any
-
eulerAngles
any
-
_scale
any
-
localTransform
any
-
_dirtyLocal
any
-
_aabbVer
any
-
_frozen
any
Marks the node to ignore hierarchy sync entirely (including children nodes). The engine code automatically freezes and unfreezes objects whenever required. Segregating dynamic and stationary nodes into subhierarchies allows to reduce sync time significantly.
-
worldTransform
any
-
_dirtyWorld
any
-
_worldScaleSign
any
Cached value representing the negatively scaled world transform. If the value is 0, this marks this value as dirty and it needs to be recalculated. If the value is 1, the world transform is not negatively scaled. If the value is -1, the world transform is negatively scaled.
-
_normalMatrix
any
-
_dirtyNormal
any
-
_right
any
-
_up
any
-
_forward
any
-
_parent
any
-
_children
GraphNode[]
-
_graphDepth
any
-
_enabled
any
Represents enabled state of the entity. If the entity is disabled, the entity including all children are excluded from updates.
-
_enabledInHierarchy
any
Represents enabled state of the entity in the hierarchy. It's true only if this entity and all parent entities all the way to the scene's root are enabled.
-
right
Vec3
Gets the normalized local space X-axis vector of the graph node in world space.
-
up
Vec3
Gets the normalized local space Y-axis vector of the graph node in world space.
-
forward
Vec3
Gets the normalized local space negative Z-axis vector of the graph node in world space.
-
enabled
boolean
Sets the enabled state of the GraphNode. If one of the GraphNode's parents is disabled there will be no other side effects. If all the parents are enabled then the new value will activate or deactivate all the enabled children of the GraphNode. Gets the enabled state of the GraphNode.
-
parent
GraphNode | null
Gets the parent of this graph node.
-
path
string
Gets the path of this graph node relative to the root of the hierarchy.
-
root
GraphNode
Gets the oldest ancestor graph node from this graph node.
-
children
GraphNode[]
Gets the children of this graph node.
-
graphDepth
number
Gets the depth of this child within the graph. Note that for performance reasons this is only recalculated when a node is added to a new parent. In other words, it is not recalculated when a node is simply removed from the graph.
-
_notifyHierarchyStateChanged
(node: GraphNode, enabled: boolean) => void
-
_onHierarchyStateChanged
(enabled: boolean) => void
Called when the enabled flag of the entity or one of its parents changes.
-
_cloneInternal
any
-
destroy
() => void
Destroy the graph node and all of its descendants. First, the graph node is removed from the hierarchy. This is then repeated recursively for all descendants of the graph node. The last thing the graph node does is fire the `destroy` event.
-
find
(attr: string | FindNodeCallback, value?: any) => GraphNode[]
Search the graph node and all of its descendants for the nodes that satisfy some search criteria.
-
findOne
(attr: string | FindNodeCallback, value?: any) => GraphNode | null
Search the graph node and all of its descendants for the first node that satisfies some search criteria.
-
findByTag
(...query: any[]) => GraphNode[]
Return all graph nodes that satisfy the search query. Query can be simply a string, or comma separated strings, to have inclusive results of assets that match at least one query. A query that consists of an array of tags can be used to match graph nodes that have each tag of array.
-
findByName
(name: string) => GraphNode | null
Get the first node found in the graph with the name. The search is depth first.
-
findByPath
(path: string | string[]) => GraphNode | null
Get the first node found in the graph by its full path in the graph. The full path has this form 'parent/child/sub-child'. The search is depth first.
-
forEach
(callback: ForEachNodeCallback, thisArg?: object | undefined) => void
Executes a provided function once on this graph node and all of its descendants.
-
isDescendantOf
(node: GraphNode) => boolean
Check if node is descendant of another node.
-
isAncestorOf
(node: GraphNode) => boolean
Check if node is ancestor for another node.
-
getEulerAngles
() => Vec3
Get the world space rotation for the specified GraphNode in Euler angles. The angles are in degrees and in XYZ order. Important: The value returned by this function should be considered read-only. In order to set the world space rotation of the graph node, use setEulerAngles.
-
getLocalEulerAngles
() => Vec3
Get the local space rotation for the specified GraphNode in Euler angles. The angles are in degrees and in XYZ order. Important: The value returned by this function should be considered read-only. In order to set the local space rotation of the graph node, use setLocalEulerAngles.
-
getLocalPosition
() => Vec3
Get the position in local space for the specified GraphNode. The position is returned as a Vec3. The returned vector should be considered read-only. To update the local position, use setLocalPosition.
-
getLocalRotation
() => Quat
Get the rotation in local space for the specified GraphNode. The rotation is returned as a Quat. The returned quaternion should be considered read-only. To update the local rotation, use setLocalRotation.
-
getLocalScale
() => Vec3
Get the scale in local space for the specified GraphNode. The scale is returned as a Vec3. The returned vector should be considered read-only. To update the local scale, use setLocalScale.
-
getLocalTransform
() => Mat4
Get the local transform matrix for this graph node. This matrix is the transform relative to the node's parent's world transformation matrix.
-
getPosition
() => Vec3
Get the world space position for the specified GraphNode. The position is returned as a Vec3. The value returned by this function should be considered read-only. In order to set the world space position of the graph node, use setPosition.
-
getRotation
() => Quat
Get the world space rotation for the specified GraphNode. The rotation is returned as a Quat. The value returned by this function should be considered read-only. In order to set the world space rotation of the graph node, use setRotation.
-
getWorldTransform
() => Mat4
Get the world transformation matrix for this graph node.
-
remove
() => void
Remove graph node from current parent.
-
reparent
(parent: GraphNode, index?: number | undefined) => void
Remove graph node from current parent and add as child to new parent.
-
setLocalEulerAngles
{ (x: number, y: number, z: number): void; (angles: Vec3): void; }
Sets the local space rotation of the specified graph node using Euler angles. Eulers are interpreted in XYZ order.
-
setLocalPosition
{ (x: number, y: number, z: number): void; (position: Vec3): void; }
Sets the local space position of the specified graph node.
-
setLocalRotation
{ (x: number, y: number, z: number, w: number): void; (rotation: Quat): void; }
Sets the local space rotation of the specified graph node.
-
setLocalScale
{ (x: number, y: number, z: number): void; (scale: Vec3): void; }
Sets the local space scale factor of the specified graph node.
-
_dirtifyLocal
any
-
_unfreezeParentToRoot
any
-
_dirtifyWorld
any
-
_dirtifyWorldInternal
any
-
setPosition
{ (x: number, y: number, z: number): void; (position: Vec3): void; }
Sets the world space position of the specified graph node.
-
setRotation
{ (x: number, y: number, z: number, w: number): void; (rotation: Quat): void; }
Sets the world space rotation of the specified graph node.
-
setPositionAndRotation
(position: Vec3, rotation: Quat) => void
Sets the world space position and rotation of the specified graph node. This is faster than setting the position and rotation independently.
-
setEulerAngles
{ (x: number, y: number, z: number): void; (angles: Vec3): void; }
Sets the world space rotation of the specified graph node using Euler angles. Eulers are interpreted in XYZ order.
-
addChild
(node: GraphNode) => void
Add a new child to the child list and update the parent value of the child node. If the node already had a parent, it is removed from its child list.
-
insertChild
(node: GraphNode, index: number) => void
Insert a new child to the child list at the specified index and update the parent value of the child node. If the node already had a parent, it is removed from its child list.
-
_prepareInsertChild
any
Prepares node for being inserted to a parent node, and removes it from the previous parent.
-
_fireOnHierarchy
any
Fires an event on all children of the node. The event `name` is fired on the first (root) node only. The event `nameHierarchy` is fired for all children.
-
_onInsertChild
any
Called when a node is inserted into a node's child list.
-
_updateGraphDepth
any
Recurse the hierarchy and update the graph depth at each node.
-
removeChild
(child: GraphNode) => void
Remove the node from the child list and update the parent value of the child.
-
_sync
() => void
-
lookAt
{ (x: number, y: number, z: number, ux?: number | undefined, uy?: number | undefined, uz?: number | undefined): void; (target: Vec3, up?: Vec3 | undefined): void; }
Reorients the graph node so that the negative z-axis points towards the target.
-
translate
{ (x: number, y: number, z: number): void; (translation: Vec3): void; }
Translates the graph node in world space by the specified translation vector.
-
translateLocal
{ (x: number, y: number, z: number): void; (translation: Vec3): void; }
Translates the graph node in local space by the specified translation vector.
-
rotate
{ (x: number, y: number, z: number): void; (rotation: Vec3): void; }
Rotates the graph node in world space by the specified Euler angles. Eulers are specified in degrees in XYZ order.
-
rotateLocal
{ (x: number, y: number, z: number): void; (rotation: Vec3): void; }
Rotates the graph node in local space by the specified Euler angles. Eulers are specified in degrees in XYZ order.
-
_callbacks
any
-
_callbackActive
any
-
on
(name: string, callback: HandleEventCallback, scope?: object | undefined) => EventHandle
Attach an event handler to an event.
-
once
(name: string, callback: HandleEventCallback, scope?: object | undefined) => EventHandle
Attach an event handler to an event. This handler will be removed after being fired once.
-
off
(name?: string | undefined, callback?: HandleEventCallback | undefined, scope?: object | undefined) => EventHandler
Detach an event handler from an event. If callback is not provided then all callbacks are unbound from the event, if scope is not provided then all events with the callback will be unbound.
-
fire
(name: string, arg1?: any, arg2?: any, arg3?: any, arg4?: any, arg5?: any, arg6?: any, arg7?: any, arg8?: any) => EventHandler
Fire an event, all additional arguments are passed on to the event listener.
-
hasEvent
(name: string) => boolean
Test if there are any handlers bound to an event name.
-

要件​

このフックは <Entity> コンポーネント内で使用する必要があります。このコンテキスト外で使用するとエラーをスローします。

// ✅ 正しい使い方
<Entity>
  <MyComponent /> {/* useParent はここで動作します */}
</Entity>

// ❌ 間違った使い方
<MyComponent /> {/* useParent はエラーをスローします */}

例​

Entity プロパティへのアクセス​

import { useParent } from '@playcanvas/react/hooks'

function EntityInfo() {
  const parent = useParent()
  
  return (
    <div>
      <p>Entity Name: {parent.name}</p>
      <p>Position: {parent.position.toString()}</p>
      <p>Rotation: {parent.rotation.toString()}</p>
      <p>Scale: {parent.scale.toString()}</p>
    </div>
  )
}

関連​

  • Entity Component - Entity コンテキストを提供するコンポーネント
  • useApp - Application インスタンスにアクセスする
  • Entity API - PlayCanvas Entity のドキュメント