com.jme3.scene

Class Node

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

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

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).
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 importer)
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.
void	updateGeometricState() updateGeometricState updates the light list, 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 light list, 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.

index - the position where the child should be attached

Returns:

the number of children maintained by this node.

Throws:

java.lang.IllegalArgumentException - if child is null or this

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 (not null)

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 longer be maintained. Only the first child with a matching name is removed.

Parameters:

childName - the child to remove (not null)

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).

Type Parameters:

T - the type of Spatial returned

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.

Type Parameters:

T - the type of Spatial returned

Parameters:

spatialSubclass - the type of Spatial returned, or null for all spatials

Returns:

a new list of pre-existing spatials (may be empty)

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.

Type Parameters:

T - the type of Spatial returned

Parameters:

nameRegex - regular expression to match Spatial names against, or null for all spatials

Returns:

a new list of pre-existing spatials (may be empty)

See Also:

descendantMatches(java.lang.Class, java.lang.String)

clone

public Node clone(boolean cloneMaterials)

Overrides:

clone in class Spatial

Parameters:

cloneMaterials - true to clone materials, false to share them

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 only 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 importer)
          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

Parameters:

visitor - the action to take for each visited 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