NodeParent

    public abstract class NodeParent
    Known Direct Subclasses
    Node A Node represents a transformation within the scene graph's hierarchy. 
    Scene The Sceneform Scene maintains the scene graph, a hierarchical organization of a scene's content. 
    Known Indirect Subclasses
    AnchorNode Node that is automatically positioned in world space based on an ARCore Anchor. 
    AugmentedFaceNode Node used to render visual effects on a face with ARCore's AugmentedFace feature. 
    BaseTransformableNode Base class for nodes that can be transformed using gestures from TransformationSystem . 
    Camera Represents a virtual camera, which determines the perspective through which the scene is viewed. 
    SkeletonNode A Node that provides mappings between the bones of a skinned ModelRenderable and a set of Node s. 
    Sun Represents the "sun" - the default directional light in the scene. 
    TransformableNode Node that can be selected, translated, rotated, and scaled using gestures from TransformationSystem . 

    Base class for all classes that can contain a set of nodes as children.

    The classes Node and Scene are both NodeParents. To make a Node the child of another Node or a Scene , use setParent(NodeParent) .

    Public Constructors

    Public Methods

    final void
    addChild ( Node child)
    Adds a node as a child of this NodeParent.
    void
    callOnHierarchy (Consumer< Node > consumer)
    Traverse the hierarchy and call a method on each node.
    Node
    findByName ( String name)
    Traverse the hierarchy to find the first node with a given name.
    Node
    findInHierarchy (Predicate< Node > condition)
    Traverse the hierarchy to find the first node that meets a condition.
    final List < Node >
    getChildren ()
    Returns an immutable list of this parent's children.
    final void
    removeChild ( Node child)
    Removes a node from the children of this NodeParent.

    Protected Methods

    boolean
    canAddChild ( Node child, StringBuilder failureReason)
    void
    onAddChild ( Node child)
    void
    onRemoveChild ( Node child)

    Inherited Methods

    Public Constructors

    public NodeParent ()

    Public Methods

    public final void addChild ( Node child)

    Adds a node as a child of this NodeParent. If the node already has a parent, it is removed from its old parent. If the node is already a direct child of this NodeParent, no change is made.

    Parameters
    child
    the node to add as a child
    Throws
    IllegalArgumentException
    if the child is the same object as the parent, or if the parent is a descendant of the child

    public void callOnHierarchy (Consumer< Node > consumer)

    Traverse the hierarchy and call a method on each node. Traversal is depth first. If this NodeParent is a Node, traversal starts with this NodeParent, otherwise traversal starts with its children.

    Parameters
    consumer
    The method to call on each node.

    public Node findByName ( String name)

    Traverse the hierarchy to find the first node with a given name. Traversal is depth first. If this NodeParent is a Node, traversal starts with this NodeParent, otherwise traversal starts with its children.

    Parameters
    name
    The name of the node to find
    Returns
    • the node if it's found, otherwise null

    public Node findInHierarchy (Predicate< Node > condition)

    Traverse the hierarchy to find the first node that meets a condition. Traversal is depth first. If this NodeParent is a Node, traversal starts with this NodeParent, otherwise traversal starts with its children.

    Parameters
    condition
    predicate the defines the conditions of the node to search for.
    Returns
    • the first node that matches the conditions of the predicate, otherwise null is returned

    public final List < Node > getChildren ()

    Returns an immutable list of this parent's children.

    public final void removeChild ( Node child)

    Removes a node from the children of this NodeParent. If the node is not a direct child of this NodeParent, no change is made.

    Parameters
    child
    the node to remove from the children

    Protected Methods

    protected boolean canAddChild ( Node child, StringBuilder failureReason)

    Parameters
    child
    failureReason

    protected void onAddChild ( Node child)

    Parameters
    child

    protected void onRemoveChild ( Node child)

    Parameters
    child
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