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java.lang.Object javax.media.j3d.SceneGraphObject javax.media.j3d.Node javax.media.j3d.Group javax.media.j3d.OrderedGroup
public class OrderedGroup
The OrderedGroup node is a Group that ensures its children render in a specified order. In addition to the list of children inherited from the base Group class, OrderedGroup defines an integer array of child indices that specify the order in which its children are rendered. This provides a level of indirection in determining the rendering order of its children. By default, the child index order array is null, and the children are rendered in increasing index order.
When the child index order array is nonnull, it must be the same
length as the number of children. Every entry in the array must
have a unique value between 0 and numChildren1
(i.e.,
there must be no duplicate values and no missing indices). The
order that the child indices appear in the child index order array
determines the order in which the children are rendered. The child
at childIndexOrder[0]
is rendered first, followed by
childIndexOrder[1]
, and so on, with the child at
childIndexOrder[numChildren1]
rendered
last.
The child index order array only affects rendering. List operations that refer to a child by index, such as getChild(index), will not be altered by the entries in this array. They will get, enumerate, add, remove, etc., the children based on the actual index in the group node. However, some of the list operations, such as addChild, removeChild, etc., will update the child index order array as a result of their operation. For example, removeChild will remove the entry in the child index order array corresponding to the removed child's index and adjust the remaining entries accordingly. See the documentation for these methods for more details.
Field Summary  

static int 
ALLOW_CHILD_INDEX_ORDER_READ
Specifies that this OrderedGroup node allows reading its child index order information. 
static int 
ALLOW_CHILD_INDEX_ORDER_WRITE
Specifies that this OrderedGroup node allows writing its child index order information. 
Fields inherited from class javax.media.j3d.Group 

ALLOW_CHILDREN_EXTEND, ALLOW_CHILDREN_READ, ALLOW_CHILDREN_WRITE, ALLOW_COLLISION_BOUNDS_READ, ALLOW_COLLISION_BOUNDS_WRITE 
Constructor Summary  

OrderedGroup()
Constructs and initializes a new OrderedGroup node object. 
Method Summary  

void 
addChild(Node child)
Appends the specified child node to this group node's list of children. 
void 
addChild(Node child,
int[] childIndexOrder)
Appends the specified child node to this group node's list of children, and sets the child index order array to the specified array. 
Node 
cloneNode(boolean forceDuplicate)
Used to create a new instance of the node. 
int[] 
getChildIndexOrder()
Retrieves the current childIndexOrder array. 
void 
insertChild(Node child,
int index)
Inserts the specified child node in this group node's list of children at the specified index. 
void 
moveTo(BranchGroup branchGroup)
Moves the specified branch group node from its existing location to the end of this group node's list of children. 
void 
removeAllChildren()
Removes all children from this Group node. 
void 
removeChild(int index)
Removes the child node at the specified index from this group node's list of children. 
void 
removeChild(Node child)
Removes the specified child node from this group node's list of children. 
void 
setChildIndexOrder(int[] childIndexOrder)
Sets the childIndexOrder array. 
Methods inherited from class javax.media.j3d.Group 

getAllChildren, getAlternateCollisionTarget, getChild, getCollisionBounds, indexOfChild, numChildren, setAlternateCollisionTarget, setChild, setCollisionBounds 
Methods inherited from class javax.media.j3d.Node 

cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, duplicateNode, getBounds, getBoundsAutoCompute, getCollidable, getLocale, getLocalToVworld, getLocalToVworld, getParent, getPickable, setBounds, setBoundsAutoCompute, setCollidable, setPickable 
Methods inherited from class javax.media.j3d.SceneGraphObject 

clearCapability, clearCapabilityIsFrequent, duplicateSceneGraphObject, getCapability, getCapabilityIsFrequent, getName, getUserData, isCompiled, isLive, setCapability, setCapabilityIsFrequent, setName, setUserData, toString, updateNodeReferences 
Methods inherited from class java.lang.Object 

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait 
Field Detail 

public static final int ALLOW_CHILD_INDEX_ORDER_READ
public static final int ALLOW_CHILD_INDEX_ORDER_WRITE
Constructor Detail 

public OrderedGroup()
Method Detail 

public void setChildIndexOrder(int[] childIndexOrder)
numChildren1
(i.e., there must be
no duplicate values and no missing indices).
childIndexOrder
 the array that is copied into this
node's child index order array; this can be null
java.lang.IllegalArgumentException
 if the specified array is
nonnull and any of the following are true:
childIndexOrder.length != numChildren
;childIndexOrder[
i] < 0
,
for i in [0, numChildren1]
;childIndexOrder[
i] >= numChildren
,
for i in [0, numChildren1]
;childIndexOrder[
i] ==
childIndexOrder[
j]
,
for i,j in [0, numChildren1]
,
i !=
j;CapabilityNotSetException
 if appropriate capability is
not set and this object is part of live or compiled scene graphpublic int[] getChildIndexOrder()
CapabilityNotSetException
 if appropriate capability is
not set and this object is part of live or compiled scene graphpublic void addChild(Node child, int[] childIndexOrder)
numChildren1
(i.e., there must be no duplicate values and no missing
indices).
child
 the child to add to this node's list of childrenchildIndexOrder
 the array that is copied into this
node's child index order array; this can be null
CapabilityNotSetException
 if the appropriate capability is
not set and this group node is part of live or compiled scene graph
RestrictedAccessException
 if this group node is part
of live
or compiled scene graph and the child node being added is not
a BranchGroup node
MultipleParentException
 if child
has already
been added as a child of another group node.
java.lang.IllegalArgumentException
 if the specified array is
nonnull and any of the following are true:
childIndexOrder.length != numChildren
;childIndexOrder[
i] < 0
,
for i in [0, numChildren1]
;childIndexOrder[
i] >= numChildren
,
for i in [0, numChildren1]
;childIndexOrder[
i] ==
childIndexOrder[
j]
,
for i,j in [0, numChildren1]
,
i !=
j;public void addChild(Node child)
If the current child index order array is nonnull, the array is increased in size by one element, and a new element containing the index of the new child is added to the end of the array. Thus, this new child will be rendered last.
addChild
in class Group
child
 the child to add to this node's list of children
CapabilityNotSetException
 if the appropriate capability is
not set and this group node is part of live or compiled scene graph
RestrictedAccessException
 if this group node is part
of live
or compiled scene graph and the child node being added is not
a BranchGroup node
MultipleParentException
 if child
has already
been added as a child of another group node.public void insertChild(Node child, int index)
insertChild
in class Group
child
 the new childindex
 at which location to insert. The index
must be a value
greater than or equal to 0 and less than or equal to
numChildren()
.
CapabilityNotSetException
 if the appropriate capability is
not set and this group node is part of live or compiled scene graph
RestrictedAccessException
 if this group node is part of
live
or compiled scene graph and the child node being inserted is not
a BranchGroup node
MultipleParentException
 if child
has already
been added as a child of another group node.
java.lang.IndexOutOfBoundsException
 if index
is invalid.
java.lang.IllegalStateException
 if the childIndexOrder array is
not null.public void removeChild(int index)
If the current child index order array is nonnull, the element containing the removed child's index will be removed from the child index order array, and the array will be reduced in size by one element. If the child removed was not the last child in the Group, the values of the child index order array will be updated to reflect the indices that were renumbered. More formally, each child whose index in the Group node was greater than the removed element (before removal) will have its index decremented by one.
removeChild
in class Group
index
 which child to remove. The index
must be a value
greater than or equal to 0 and less than numChildren()
.
CapabilityNotSetException
 if the appropriate capability is
not set and this group node is part of live or compiled scene graph
RestrictedAccessException
 if this group node is part of
live or compiled scene graph and the child node being removed is not
a BranchGroup node
java.lang.IndexOutOfBoundsException
 if index
is invalid.public void moveTo(BranchGroup branchGroup)
If the current child index order array is nonnull, the array is increased in size by one element, and a new element containing the index of the new child is added to the end of the array. Thus, this new child will be rendered last.
moveTo
in class Group
branchGroup
 the branch group node to move to this node's list
of children
CapabilityNotSetException
 if the appropriate capability is
not set and this group node is part of live or compiled scene graphpublic void removeChild(Node child)
If the current child index order array is nonnull, the element containing the removed child's index will be removed from the child index order array, and the array will be reduced in size by one element. If the child removed was not the last child in the Group, the values of the child index order array will be updated to reflect the indices that were renumbered. More formally, each child whose index in the Group node was greater than the removed element (before removal) will have its index decremented by one.
removeChild
in class Group
child
 the child node to be removed.
CapabilityNotSetException
 if appropriate capability is
not set and this object is part of live or compiled scene graph
RestrictedAccessException
 if this group node is part of
live or compiled scene graph and the child node being removed is not
a BranchGroup nodepublic void removeAllChildren()
If the current child index order array is nonnull, then it is set to a zerolength array (the empty set). Note that a zerolength child index order array is not the same as a null array in that as new elements are added, the child index order array will grow and will be used instead of the Group's natural child order.
removeAllChildren
in class Group
CapabilityNotSetException
 if appropriate capability is
not set and this object is part of live or compiled scene graph
RestrictedAccessException
 if this group node is part of
live or compiled scene graph and any of the children being removed are
not BranchGroup nodespublic Node cloneNode(boolean forceDuplicate)
cloneTree
to duplicate the current node.
cloneNode
in class Group
forceDuplicate
 when set to true
, causes the
duplicateOnCloneTree
flag to be ignored. When
false
, the value of each node's
duplicateOnCloneTree
variable determines whether
NodeComponent data is duplicated or copied.Node.cloneTree()
,
Node.cloneNode(boolean)
,
Node.duplicateNode(javax.media.j3d.Node, boolean)
,
NodeComponent.setDuplicateOnCloneTree(boolean)


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