Node (jMonkeyEngine3)

java.lang.Object
- com.jme3.scene.Spatial
- - com.jme3.scene.Node

All Implemented Interfaces:

HasLocalTransform, CloneableSmartAsset, Collidable, Savable, JmeCloneable, java.lang.Cloneable

Direct Known Subclasses:

ArmatureDebugger, ArmatureNode, AssetLinkNode, AudioNode, BitmapText, CameraNode, GeometryGroupNode, LightNode, SkeletonDebugger, StatsView, TerrainQuad, TestJoystick.ButtonView, TestJoystick.GamepadView
```
public class Node
extends Spatial
```
Node defines an internal node of a scene graph. The internal node maintains a collection of children and handles merging said children into a single bound to allow for very fast culling of multiple nodes. Node allows for any number of children to be attached.

Nested Class Summary
- Nested classes/interfaces inherited from class com.jme3.scene.Spatial
  Spatial.BatchHint, Spatial.CullHint, Spatial.DFSMode

Field Summary

Fields
Modifier and Type Field and Description

protected SafeArrayList<Spatial> children
This node's children.
- Fields inherited from class com.jme3.scene.Spatial
  batchHint, controls, cullHint, frustrumIntersects, key, localLights, localOverrides, localTransform, name, parent, queueBucket, queueDistance, refreshFlags, RF_BOUND, RF_CHILD_LIGHTLIST, RF_LIGHTLIST, RF_MATPARAM_OVERRIDE, RF_TRANSFORM, shadowMode, userData, worldBound, worldLights, worldOverrides, worldTransform

Fields
Modifier and Type	Field and Description
`protected SafeArrayList<Spatial>`	`children` This node's children.

Constructor Summary

Constructors
Constructor and Description
`Node()` Instantiate a `Node` with no name, no parent, and no children.
`Node(java.lang.String name)` Constructor instantiates a new `Node` with a default empty list for containing children.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`int`	`attachChild(Spatial child)` `attachChild` attaches a child to this node.
`int`	`attachChildAt(Spatial child, int index)` `attachChildAt` attaches a child to this node at an index.
`protected void`	`breadthFirstTraversal(SceneGraphVisitor visitor, java.util.Queue<Spatial> queue)`
`Node`	`clone(boolean cloneMaterials)`
`void`	`cloneFields(Cloner cloner, java.lang.Object original)` Called internally by com.jme3.util.clone.Cloner.
`int`	`collideWith(Collidable other, CollisionResults results)` Check collision with another Collidable.
`Spatial`	`deepClone()`
`void`	`depthFirstTraversal(SceneGraphVisitor visitor, Spatial.DFSMode mode)` Visit each scene graph element ordered by DFS.
`<T extends Spatial> java.util.List<T>`	`descendantMatches(java.lang.Class<T> spatialSubclass)` Convenience wrapper.
`<T extends Spatial> java.util.List<T>`	`descendantMatches(java.lang.Class<T> spatialSubclass, java.lang.String nameRegex)` Returns flat list of Spatials implementing the specified class AND with name matching the specified pattern.
`<T extends Spatial> java.util.List<T>`	`descendantMatches(java.lang.String nameRegex)` Convenience wrapper.
`void`	`detachAllChildren()` `detachAllChildren` removes all children attached to this node.
`int`	`detachChild(Spatial child)` `detachChild` removes a given child from the node's list.
`Spatial`	`detachChildAt(int index)` `detachChildAt` removes a child at a given index.
`int`	`detachChildNamed(java.lang.String childName)` `detachChild` removes a given child from the node's list.
`Spatial`	`getChild(int i)` `getChild` returns a child at a given index.
`Spatial`	`getChild(java.lang.String name)` `getChild` returns the first child found with exactly the given name (case sensitive.) This method does a depth first recursive search of all descendants of this node, it will return the first spatial found with a matching name.
`int`	`getChildIndex(Spatial sp)` `getChildIndex` returns the index of the given spatial in this node's list of children.
`java.util.List<Spatial>`	`getChildren()` Returns all children to this node.
`int`	`getQuantity()` `getQuantity` returns the number of children this node maintains.
`int`	`getTriangleCount()` `getTriangleCount` returns the number of triangles contained in all sub-branches of this node that contain geometry.
`int`	`getVertexCount()` `getVertexCount` returns the number of vertices contained in all sub-branches of this node that contain geometry.
`boolean`	`hasChild(Spatial spat)` determines if the provided Spatial is contained in the children list of this node.
`Spatial`	`oldDeepClone()`
`void`	`read(JmeImporter e)`
`protected void`	`setLightListRefresh()`
`void`	`setLodLevel(int lod)` Sets the level of detail to use when rendering this Spatial, this call propagates to all geometries under this Spatial.
`void`	`setMaterial(Material mat)` Applies the given material to the Spatial, this will propagate the material down to the geometries in the scene graph.
`protected void`	`setMatParamOverrideRefresh()`
`void`	`setModelBound(BoundingVolume modelBound)` `setModelBound` sets the bounding object for this Spatial.
`protected void`	`setParent(Node parent)` Called by `attachChild(Spatial)` and `detachChild(Spatial)` - don't call directly.
`protected void`	`setTransformRefresh()` Indicate that the transform of this spatial has changed and that a refresh is required.
`void`	`swapChildren(int index1, int index2)` More efficient than e.g detaching and attaching as no updates are needed.
`void`	`updateGeometricState()` `updateGeometricState` updates the lightlist, computes the world transforms, and computes the world bounds for this Spatial.
`void`	`updateLogicalState(float tpf)` `updateLogicalState` calls the `update()` method for all controls attached to this Spatial.
`void`	`updateModelBound()` `updateModelBound` recalculates the bounding object for this Spatial.
`protected void`	`updateWorldBound()` Should be overridden by Node and Geometry.
`void`	`write(JmeExporter e)`

Methods inherited from class com.jme3.scene.Spatial
addControl, addLight, addMatParamOverride, breadthFirstTraversal, center, checkCulling, clearMatParamOverrides, clone, depthFirstTraversal, forceRefresh, getBatchHint, getControl, getControl, getCullHint, getKey, getLastFrustumIntersection, getLocalBatchHint, getLocalCullHint, getLocalLightList, getLocalMatParamOverrides, getLocalQueueBucket, getLocalRotation, getLocalScale, getLocalShadowMode, getLocalToWorldMatrix, getLocalTransform, getLocalTranslation, getName, getNumControls, getParent, getQueueBucket, getShadowMode, getUserData, getUserDataKeys, getWorldBound, getWorldLightList, getWorldMatParamOverrides, getWorldRotation, getWorldScale, getWorldTransform, getWorldTranslation, hasAncestor, jmeClone, localToWorld, lookAt, matches, move, move, oldClone, removeControl, removeControl, removeFromParent, removeLight, removeMatParamOverride, rotate, rotate, rotateUpTo, runControlRender, scale, scale, setBatchHint, setBoundRefresh, setCullHint, setKey, setLastFrustumIntersection, setLocalRotation, setLocalRotation, setLocalScale, setLocalScale, setLocalScale, setLocalTransform, setLocalTranslation, setLocalTranslation, setName, setQueueBucket, setRequiresUpdates, setShadowMode, setUserData, toString, updateMatParamOverrides, updateWorldLightList, updateWorldTransforms, worldToLocal

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - children
```
protected SafeArrayList<Spatial> children
```
    This node's children.
- Constructor Detail
  - Node
```
public Node()
```
    Instantiate a Node with no name, no parent, and no children.
  - Node
```
public Node(java.lang.String name)
```
    Constructor instantiates a new Node with a default empty list for containing children.
    
    Parameters:
    
    name - the name of the scene element
- Method Detail
  - getQuantity
```
public int getQuantity()
```
    getQuantity returns the number of children this node maintains.
    
    Returns:
    
    the number of children this node maintains.
  - setTransformRefresh
```
protected void setTransformRefresh()
```
    Description copied from class: Spatial
    
    Indicate that the transform of this spatial has changed and that a refresh is required.
    
    Overrides:
    
    setTransformRefresh in class Spatial
  - setLightListRefresh
```
protected void setLightListRefresh()
```
    Overrides:
    
    setLightListRefresh in class Spatial
  - setMatParamOverrideRefresh
```
protected void setMatParamOverrideRefresh()
```
    Overrides:
    
    setMatParamOverrideRefresh in class Spatial
  - updateWorldBound
```
protected void updateWorldBound()
```
    Description copied from class: Spatial
    
    Should be overridden by Node and Geometry.
    
    Overrides:
    
    updateWorldBound in class Spatial
  - setParent
```
protected void setParent(Node parent)
```
    Description copied from class: Spatial
    
    Called by attachChild(Spatial) and detachChild(Spatial) - don't call directly. setParent sets the parent of this node.
    
    Overrides:
    
    setParent in class Spatial
    
    Parameters:
    
    parent - the parent of this node.
  - updateLogicalState
```
public void updateLogicalState(float tpf)
```
    Description copied from class: Spatial
    
    updateLogicalState calls the update() method for all controls attached to this Spatial.
    
    Overrides:
    
    updateLogicalState in class Spatial
    
    Parameters:
    
    tpf - Time per frame.
    
    See Also:
    
    Spatial.addControl(com.jme3.scene.control.Control)
  - updateGeometricState
```
public void updateGeometricState()
```
    Description copied from class: Spatial
    
    updateGeometricState updates the lightlist, computes the world transforms, and computes the world bounds for this Spatial. Calling this when the Spatial is attached to a node will cause undefined results. User code should only call this method on Spatials having no parent.
    
    Overrides:
    
    updateGeometricState in class Spatial
    
    See Also:
    
    Spatial.getWorldLightList(), Spatial.getWorldTransform(), Spatial.getWorldBound()
  - getTriangleCount
```
public int getTriangleCount()
```
    getTriangleCount returns the number of triangles contained in all sub-branches of this node that contain geometry.
    
    Specified by:
    
    getTriangleCount in class Spatial
    
    Returns:
    
    the triangle count of this branch.
  - getVertexCount
```
public int getVertexCount()
```
    getVertexCount returns the number of vertices contained in all sub-branches of this node that contain geometry.
    
    Specified by:
    
    getVertexCount in class Spatial
    
    Returns:
    
    the vertex count of this branch.
  - attachChild
```
public int attachChild(Spatial child)
```
    attachChild attaches a child to this node. This node becomes the child's parent. The current number of children maintained is returned.
    If the child already had a parent it is detached from that former parent.
    
    Parameters:
    
    child - the child to attach to this node.
    
    Returns:
    
    the number of children maintained by this node.
    
    Throws:
    
    java.lang.IllegalArgumentException - if child is null.
  - attachChildAt
```
public int attachChildAt(Spatial child,
                         int index)
```
    attachChildAt attaches a child to this node at an index. This node becomes the child's parent. The current number of children maintained is returned.
    If the child already had a parent it is detached from that former parent.
    
    Parameters:
    
    child - the child to attach to this node.
    
    Returns:
    
    the number of children maintained by this node.
    
    Throws:
    
    java.lang.NullPointerException - if child is null.
  - detachChild
```
public int detachChild(Spatial child)
```
    detachChild removes a given child from the node's list. This child will no longer be maintained.
    
    Parameters:
    
    child - the child to remove.
    
    Returns:
    
    the index the child was at. -1 if the child was not in the list.
  - detachChildNamed
```
public int detachChildNamed(java.lang.String childName)
```
    detachChild removes a given child from the node's list. This child will no longe be maintained. Only the first child with a matching name is removed.
    
    Parameters:
    
    childName - the child to remove.
    
    Returns:
    
    the index the child was at. -1 if the child was not in the list.
  - detachChildAt
```
public Spatial detachChildAt(int index)
```
    detachChildAt removes a child at a given index. That child is returned for saving purposes.
    
    Parameters:
    
    index - the index of the child to be removed.
    
    Returns:
    
    the child at the supplied index.
  - detachAllChildren
```
public void detachAllChildren()
```
    detachAllChildren removes all children attached to this node.
  - getChildIndex
```
public int getChildIndex(Spatial sp)
```
    getChildIndex returns the index of the given spatial in this node's list of children.
    
    Parameters:
    
    sp - The spatial to look up
    
    Returns:
    
    The index of the spatial in the node's children, or -1 if the spatial is not attached to this node
  - swapChildren
```
public void swapChildren(int index1,
                         int index2)
```
    More efficient than e.g detaching and attaching as no updates are needed.
    
    Parameters:
    
    index1 - The index of the first child to swap
    
    index2 - The index of the second child to swap
  - getChild
```
public Spatial getChild(int i)
```
    getChild returns a child at a given index.
    
    Parameters:
    
    i - the index to retrieve the child from.
    
    Returns:
    
    the child at a specified index.
  - getChild
```
public Spatial getChild(java.lang.String name)
```
    getChild returns the first child found with exactly the given name (case sensitive.) This method does a depth first recursive search of all descendants of this node, it will return the first spatial found with a matching name.
    
    Parameters:
    
    name - the name of the child to retrieve. If null, we'll return null.
    
    Returns:
    
    the child if found, or null.
  - hasChild
```
public boolean hasChild(Spatial spat)
```
    determines if the provided Spatial is contained in the children list of this node.
    
    Parameters:
    
    spat - the child object to look for.
    
    Returns:
    
    true if the object is contained, false otherwise.
  - getChildren
```
public java.util.List<Spatial> getChildren()
```
    Returns all children to this node. Note that modifying that given list is not allowed.
    
    Returns:
    
    a list containing all children to this node
  - setMaterial
```
public void setMaterial(Material mat)
```
    Description copied from class: Spatial
    
    Applies the given material to the Spatial, this will propagate the material down to the geometries in the scene graph.
    
    Overrides:
    
    setMaterial in class Spatial
    
    Parameters:
    
    mat - The material to set.
  - setLodLevel
```
public void setLodLevel(int lod)
```
    Description copied from class: Spatial
    
    Sets the level of detail to use when rendering this Spatial, this call propagates to all geometries under this Spatial.
    
    Overrides:
    
    setLodLevel in class Spatial
    
    Parameters:
    
    lod - The lod level to set.
  - collideWith
```
public int collideWith(Collidable other,
                       CollisionResults results)
```
    Description copied from interface: Collidable
    
    Check collision with another Collidable.
    
    Parameters:
    
    other - The object to check collision against
    
    results - Will contain the list of CollisionResults.
    
    Returns:
    
    how many collisions were found between this and other
  - descendantMatches
```
public <T extends Spatial> java.util.List<T> descendantMatches(java.lang.Class<T> spatialSubclass,
                                                               java.lang.String nameRegex)
```
    Returns flat list of Spatials implementing the specified class AND with name matching the specified pattern.
    
    Note that we are matching the pattern, therefore the pattern must match the entire pattern (i.e. it behaves as if it is sandwiched between "^" and "$"). You can set regex modes, like case insensitivity, by using the (?X) or (?X:Y) constructs.
    
    By design, it is always safe to code loops like:
```
     for (Spatial spatial : node.descendantMatches(AClass.class, "regex"))
 
```
    "Descendants" does not include self, per the definition of the word. To test for descendants AND self, you must do a node.matches(aClass, aRegex) + node.descendantMatches(aClass, aRegex).
    Parameters:
    
    spatialSubclass - Subclass which matching Spatials must implement. Null causes all Spatials to qualify.
    
    nameRegex - Regular expression to match Spatial name against. Null causes all Names to qualify.
    
    Returns:
    
    Non-null, but possibly 0-element, list of matching Spatials (also Instances extending Spatials).
    
    See Also:
    
    Pattern, Spatial.matches(java.lang.Class, java.lang.String)
  - descendantMatches
```
public <T extends Spatial> java.util.List<T> descendantMatches(java.lang.Class<T> spatialSubclass)
```
    Convenience wrapper.
    
    See Also:
    
    descendantMatches(java.lang.Class, java.lang.String)
  - descendantMatches
```
public <T extends Spatial> java.util.List<T> descendantMatches(java.lang.String nameRegex)
```
    Convenience wrapper.
    
    See Also:
    
    descendantMatches(java.lang.Class, java.lang.String)
  - clone
```
public Node clone(boolean cloneMaterials)
```
    Overrides:
    
    clone in class Spatial
    
    Returns:
    
    A clone of this Spatial, the scene graph in its entirety is cloned and can be altered independently of the original scene graph. Note that meshes of geometries are not cloned explicitly, they are shared if static, or specially cloned if animated.
    
    See Also:
    
    Mesh.cloneForAnim()
  - deepClone
```
public Spatial deepClone()
```
    Overrides:
    
    deepClone in class Spatial
    
    Returns:
    
    Similar to Spatial.clone() except will create a deep clone of all geometries' meshes. Normally this method shouldn't be used. Instead, use Spatial.clone()
    
    See Also:
    
    Spatial.clone()
  - oldDeepClone
```
public Spatial oldDeepClone()
```
  - cloneFields
```
public void cloneFields(Cloner cloner,
                        java.lang.Object original)
```
    Called internally by com.jme3.util.clone.Cloner. Do not call directly.
    
    Specified by:
    
    cloneFields in interface JmeCloneable
    
    Overrides:
    
    cloneFields in class Spatial
    
    Parameters:
    
    cloner - The cloner that is performing the cloning operation. The cloneFields method can call back into the cloner to make clones of its subordinate fields.
    
    original - The original object from which this object was cloned. This is provided for the very rare case that this object needs to refer to its original for some reason. In general, all of the relevant values should have been transferred during the shallow clone and this object need merely clone what it wants.
  - write
```
public void write(JmeExporter e)
           throws java.io.IOException
```
    Specified by:
    
    write in interface Savable
    
    Overrides:
    
    write in class Spatial
    
    Throws:
    
    java.io.IOException
  - read
```
public void read(JmeImporter e)
          throws java.io.IOException
```
    Specified by:
    
    read in interface Savable
    
    Overrides:
    
    read in class Spatial
    
    Throws:
    
    java.io.IOException
  - setModelBound
```
public void setModelBound(BoundingVolume modelBound)
```
    Description copied from class: Spatial
    
    setModelBound sets the bounding object for this Spatial.
    
    Specified by:
    
    setModelBound in class Spatial
    
    Parameters:
    
    modelBound - the bounding object for this spatial.
  - updateModelBound
```
public void updateModelBound()
```
    Description copied from class: Spatial
    
    updateModelBound recalculates the bounding object for this Spatial.
    
    Specified by:
    
    updateModelBound in class Spatial
  - depthFirstTraversal
```
public void depthFirstTraversal(SceneGraphVisitor visitor,
                                Spatial.DFSMode mode)
```
    Description copied from class: Spatial
    
    Visit each scene graph element ordered by DFS. There are two modes: pre order and post order.
    
    Specified by:
    
    depthFirstTraversal in class Spatial
    
    mode - the traversal mode: pre order or post order
  - breadthFirstTraversal
```
protected void breadthFirstTraversal(SceneGraphVisitor visitor,
                                     java.util.Queue<Spatial> queue)
```
    Specified by:
    
    breadthFirstTraversal in class Spatial

Class Node

Nested Class Summary

Nested classes/interfaces inherited from class com.jme3.scene.Spatial

Field Summary

Fields inherited from class com.jme3.scene.Spatial

Constructor Summary

Method Summary

Methods inherited from class com.jme3.scene.Spatial

Methods inherited from class java.lang.Object

Field Detail

children

Constructor Detail

Node

Node

Method Detail

getQuantity

setTransformRefresh

setLightListRefresh

setMatParamOverrideRefresh

updateWorldBound

setParent

updateLogicalState

updateGeometricState

getTriangleCount

getVertexCount

attachChild

attachChildAt

detachChild

detachChildNamed

detachChildAt

detachAllChildren

getChildIndex

swapChildren

getChild

getChild

hasChild

getChildren

setMaterial

setLodLevel

collideWith

descendantMatches

descendantMatches

descendantMatches

clone

deepClone

oldDeepClone

cloneFields

write

read

setModelBound

updateModelBound

depthFirstTraversal

breadthFirstTraversal