Package javax.media.j3d
Class BranchGroup
java.lang.Object
javax.media.j3d.SceneGraphObject
javax.media.j3d.Node
javax.media.j3d.Group
javax.media.j3d.BranchGroup
- Direct Known Subclasses:
PlatformGeometry
,ViewerAvatar
,ViewingPlatform
The BranchGroup serves as a pointer to the root of a
scene graph branch; BranchGroup objects are the only objects that
can be inserted into a Locale's set of objects. A subgraph, rooted
by a BranchGroup node can be thought of as a compile unit. The
following things may be done with BranchGroup:
- A BranchGroup may be compiled by calling its compile method. This causes the entire subgraph to be compiled. If any BranchGroup nodes are contained within the subgraph, they are compiled as well (along with their descendants).
- A BranchGroup may be inserted into a virtual universe by attaching it to a Locale. The entire subgraph is then said to be live.
- A BranchGroup that is contained within another subgraph may be reparented or detached at run time if the appropriate capabilities are set.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
For BranchGroup nodes, specifies that this BranchGroup allows detaching from its parent.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
Fields inherited from class javax.media.j3d.Node
ALLOW_AUTO_COMPUTE_BOUNDS_READ, ALLOW_AUTO_COMPUTE_BOUNDS_WRITE, ALLOW_BOUNDS_READ, ALLOW_BOUNDS_WRITE, ALLOW_COLLIDABLE_READ, ALLOW_COLLIDABLE_WRITE, ALLOW_LOCAL_TO_VWORLD_READ, ALLOW_LOCALE_READ, ALLOW_PARENT_READ, ALLOW_PICKABLE_READ, ALLOW_PICKABLE_WRITE, ENABLE_COLLISION_REPORTING, ENABLE_PICK_REPORTING
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptioncloneNode
(boolean forceDuplicate) Creates a new instance of the node.void
compile()
Compiles the source BranchGroup associated with this object and creates and caches a compiled scene graph.void
detach()
Detaches this BranchGroup from its parent.PickInfo[]
Returns an array unsorted references to all the PickInfo objects that are pickable below thisBranchGroup
that intersect with PickShape.Returns an array referencing all the items that are pickable below thisBranchGroup
that intersect with PickShape.PickInfo[]
pickAllSorted
(int mode, int flags, PickShape pickShape) Returns a sorted array of PickInfo references to all the pickable items that intersect with the pickShape.pickAllSorted
(PickShape pickShape) Returns a sorted array of references to all the Pickable items that intersect with the pickShape.Returns a PickInfo which references the pickable item below this BranchGroup that intersects withpickShape
.Returns a reference to any item that is Pickable below this BranchGroup that intersects withpickShape
.pickClosest
(int mode, int flags, PickShape pickShape) Returns a PickInfo which references the pickable item which is closest to the origin ofpickShape
.pickClosest
(PickShape pickShape) Returns a SceneGraphPath that references the pickable item closest to the origin ofpickShape
.Methods inherited from class javax.media.j3d.Group
addChild, getAllChildren, getAlternateCollisionTarget, getChild, getCollisionBounds, indexOfChild, insertChild, moveTo, numChildren, removeAllChildren, removeChild, removeChild, 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
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Field Details
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ALLOW_DETACH
public static final int ALLOW_DETACHFor BranchGroup nodes, specifies that this BranchGroup allows detaching from its parent.- See Also:
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Constructor Details
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BranchGroup
public BranchGroup()Constructs and initializes a new BranchGroup node object.
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Method Details
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compile
public void compile()Compiles the source BranchGroup associated with this object and creates and caches a compiled scene graph.- Throws:
SceneGraphCycleException
- if there is a cycle in the scene graphRestrictedAccessException
- if the method is called when this object is part of a live scene graph.
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detach
public void detach()Detaches this BranchGroup from its parent. -
pickAll
Returns an array referencing all the items that are pickable below thisBranchGroup
that intersect with PickShape. The resultant array is unordered.- Parameters:
pickShape
- the PickShape object- Throws:
IllegalStateException
- if BranchGroup is not live.- See Also:
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pickAll
Returns an array unsorted references to all the PickInfo objects that are pickable below thisBranchGroup
that intersect with PickShape. The accuracy of the pick is set by the pick mode. The mode include : PickInfo.PICK_BOUNDS and PickInfo.PICK_GEOMETRY. The amount of information returned is specified via a masked variable, flags, indicating which components are present in each returned PickInfo object.- Parameters:
mode
- picking mode, one ofPickInfo.PICK_BOUNDS
orPickInfo.PICK_GEOMETRY
.flags
- a mask indicating which components are present in each PickInfo object. This is specified as one or more individual bits that are bitwise "OR"ed together to describe the PickInfo data. The flags include :PickInfo.SCENEGRAPHPATH
- request for computed SceneGraphPath.
PickInfo.NODE
- request for computed intersected Node.
PickInfo.LOCAL_TO_VWORLD
- request for computed local to virtual world transform.
PickInfo.CLOSEST_INTERSECTION_POINT
- request for closest intersection point.
PickInfo.CLOSEST_DISTANCE
- request for the distance of closest intersection.
PickInfo.CLOSEST_GEOM_INFO
- request for only the closest intersection geometry information.
PickInfo.ALL_GEOM_INFO
- request for all intersection geometry information.
pickShape
- the description of this picking volume or area.- Throws:
IllegalArgumentException
- if flags contains both CLOSEST_GEOM_INFO and ALL_GEOM_INFO.IllegalArgumentException
- if pickShape is a PickPoint and pick mode is set to PICK_GEOMETRY.IllegalArgumentException
- if pick mode is neither PICK_BOUNDS nor PICK_GEOMETRY.IllegalArgumentException
- if pick mode is PICK_BOUNDS and flags includes any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO.IllegalArgumentException
- if pickShape is PickBounds and flags includes any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO.IllegalStateException
- if BranchGroup is not live.CapabilityNotSetException
- if the mode is PICK_GEOMETRY and the Geometry.ALLOW_INTERSECT capability bit is not set in any Geometry objects referred to by any shape node whose bounds intersects the PickShape.CapabilityNotSetException
- if flags contains any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO, and the capability bits that control reading of coordinate data are not set in any GeometryArray object referred to by any shape node that intersects the PickShape. The capability bits that must be set to avoid this exception are as follows :- By-copy geometry : GeometryArray.ALLOW_COORDINATE_READ
- By-reference geometry : GeometryArray.ALLOW_REF_DATA_READ
- Indexed geometry : IndexedGeometryArray.ALLOW_COORDINATE_INDEX_READ (in addition to one of the above)
- Since:
- Java 3D 1.4
- See Also:
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pickAllSorted
Returns a sorted array of references to all the Pickable items that intersect with the pickShape. Element [0] references the item closest to origin of PickShape successive array elements are further from the origin Note: If pickShape is of type PickBounds, the resulting array is unordered.- Parameters:
pickShape
- the PickShape object- Throws:
IllegalStateException
- if BranchGroup is not live.- See Also:
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pickAllSorted
Returns a sorted array of PickInfo references to all the pickable items that intersect with the pickShape. Element [0] references the item closest to origin of PickShape successive array elements are further from the origin The accuracy of the pick is set by the pick mode. The mode include : PickInfo.PICK_BOUNDS and PickInfo.PICK_GEOMETRY. The amount of information returned is specified via a masked variable, flags, indicating which components are present in each returned PickInfo object.- Parameters:
mode
- picking mode, one ofPickInfo.PICK_BOUNDS
orPickInfo.PICK_GEOMETRY
.flags
- a mask indicating which components are present in each PickInfo object. This is specified as one or more individual bits that are bitwise "OR"ed together to describe the PickInfo data. The flags include :PickInfo.SCENEGRAPHPATH
- request for computed SceneGraphPath.
PickInfo.NODE
- request for computed intersected Node.
PickInfo.LOCAL_TO_VWORLD
- request for computed local to virtual world transform.
PickInfo.CLOSEST_INTERSECTION_POINT
- request for closest intersection point.
PickInfo.CLOSEST_DISTANCE
- request for the distance of closest intersection.
PickInfo.CLOSEST_GEOM_INFO
- request for only the closest intersection geometry information.
PickInfo.ALL_GEOM_INFO
- request for all intersection geometry information.
pickShape
- the description of this picking volume or area.- Throws:
IllegalArgumentException
- if flags contains both CLOSEST_GEOM_INFO and ALL_GEOM_INFO.IllegalArgumentException
- if pickShape is a PickPoint and pick mode is set to PICK_GEOMETRY.IllegalArgumentException
- if pick mode is neither PICK_BOUNDS nor PICK_GEOMETRY.IllegalArgumentException
- if pick mode is PICK_BOUNDS and flags includes any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO.IllegalArgumentException
- if pickShape is PickBounds and flags includes any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO.IllegalStateException
- if BranchGroup is not live.CapabilityNotSetException
- if the mode is PICK_GEOMETRY and the Geometry.ALLOW_INTERSECT capability bit is not set in any Geometry objects referred to by any shape node whose bounds intersects the PickShape.CapabilityNotSetException
- if flags contains any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO, and the capability bits that control reading of coordinate data are not set in any GeometryArray object referred to by any shape node that intersects the PickShape. The capability bits that must be set to avoid this exception are as follows :- By-copy geometry : GeometryArray.ALLOW_COORDINATE_READ
- By-reference geometry : GeometryArray.ALLOW_REF_DATA_READ
- Indexed geometry : IndexedGeometryArray.ALLOW_COORDINATE_INDEX_READ (in addition to one of the above)
- Since:
- Java 3D 1.4
- See Also:
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pickClosest
Returns a SceneGraphPath that references the pickable item closest to the origin ofpickShape
. Note: If pickShape is of type PickBounds, the return is any pickable node below this BranchGroup.- Parameters:
pickShape
- the PickShape object- Throws:
IllegalStateException
- if BranchGroup is not live.- See Also:
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pickClosest
Returns a PickInfo which references the pickable item which is closest to the origin ofpickShape
. The accuracy of the pick is set by the pick mode. The mode include : PickInfo.PICK_BOUNDS and PickInfo.PICK_GEOMETRY. The amount of information returned is specified via a masked variable, flags, indicating which components are present in each returned PickInfo object.- Parameters:
mode
- picking mode, one ofPickInfo.PICK_BOUNDS
orPickInfo.PICK_GEOMETRY
.flags
- a mask indicating which components are present in each PickInfo object. This is specified as one or more individual bits that are bitwise "OR"ed together to describe the PickInfo data. The flags include :PickInfo.SCENEGRAPHPATH
- request for computed SceneGraphPath.
PickInfo.NODE
- request for computed intersected Node.
PickInfo.LOCAL_TO_VWORLD
- request for computed local to virtual world transform.
PickInfo.CLOSEST_INTERSECTION_POINT
- request for closest intersection point.
PickInfo.CLOSEST_DISTANCE
- request for the distance of closest intersection.
PickInfo.CLOSEST_GEOM_INFO
- request for only the closest intersection geometry information.
PickInfo.ALL_GEOM_INFO
- request for all intersection geometry information.
pickShape
- the description of this picking volume or area.- Throws:
IllegalArgumentException
- if flags contains both CLOSEST_GEOM_INFO and ALL_GEOM_INFO.IllegalArgumentException
- if pickShape is a PickPoint and pick mode is set to PICK_GEOMETRY.IllegalArgumentException
- if pick mode is neither PICK_BOUNDS nor PICK_GEOMETRY.IllegalArgumentException
- if pick mode is PICK_BOUNDS and flags includes any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO.IllegalArgumentException
- if pickShape is PickBounds and flags includes any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO.IllegalStateException
- if BranchGroup is not live.CapabilityNotSetException
- if the mode is PICK_GEOMETRY and the Geometry.ALLOW_INTERSECT capability bit is not set in any Geometry objects referred to by any shape node whose bounds intersects the PickShape.CapabilityNotSetException
- if flags contains any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO, and the capability bits that control reading of coordinate data are not set in any GeometryArray object referred to by any shape node that intersects the PickShape. The capability bits that must be set to avoid this exception are as follows :- By-copy geometry : GeometryArray.ALLOW_COORDINATE_READ
- By-reference geometry : GeometryArray.ALLOW_REF_DATA_READ
- Indexed geometry : IndexedGeometryArray.ALLOW_COORDINATE_INDEX_READ (in addition to one of the above)
- Since:
- Java 3D 1.4
- See Also:
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pickAny
Returns a reference to any item that is Pickable below this BranchGroup that intersects withpickShape
.- Parameters:
pickShape
- the PickShape object- Throws:
IllegalStateException
- if BranchGroup is not live.- See Also:
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pickAny
Returns a PickInfo which references the pickable item below this BranchGroup that intersects withpickShape
. The accuracy of the pick is set by the pick mode. The mode include : PickInfo.PICK_BOUNDS and PickInfo.PICK_GEOMETRY. The amount of information returned is specified via a masked variable, flags, indicating which components are present in each returned PickInfo object.- Parameters:
mode
- picking mode, one ofPickInfo.PICK_BOUNDS
orPickInfo.PICK_GEOMETRY
.flags
- a mask indicating which components are present in each PickInfo object. This is specified as one or more individual bits that are bitwise "OR"ed together to describe the PickInfo data. The flags include :PickInfo.SCENEGRAPHPATH
- request for computed SceneGraphPath.
PickInfo.NODE
- request for computed intersected Node.
PickInfo.LOCAL_TO_VWORLD
- request for computed local to virtual world transform.
PickInfo.CLOSEST_INTERSECTION_POINT
- request for closest intersection point.
PickInfo.CLOSEST_DISTANCE
- request for the distance of closest intersection.
PickInfo.CLOSEST_GEOM_INFO
- request for only the closest intersection geometry information.
PickInfo.ALL_GEOM_INFO
- request for all intersection geometry information.
pickShape
- the description of this picking volume or area.- Throws:
IllegalArgumentException
- if flags contains both CLOSEST_GEOM_INFO and ALL_GEOM_INFO.IllegalArgumentException
- if pickShape is a PickPoint and pick mode is set to PICK_GEOMETRY.IllegalArgumentException
- if pick mode is neither PICK_BOUNDS nor PICK_GEOMETRY.IllegalArgumentException
- if pick mode is PICK_BOUNDS and flags includes any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO.IllegalArgumentException
- if pickShape is PickBounds and flags includes any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO.IllegalStateException
- if BranchGroup is not live.CapabilityNotSetException
- if the mode is PICK_GEOMETRY and the Geometry.ALLOW_INTERSECT capability bit is not set in any Geometry objects referred to by any shape node whose bounds intersects the PickShape.CapabilityNotSetException
- if flags contains any of CLOSEST_INTERSECTION_POINT, CLOSEST_DISTANCE, CLOSEST_GEOM_INFO or ALL_GEOM_INFO, and the capability bits that control reading of coordinate data are not set in any GeometryArray object referred to by any shape node that intersects the PickShape. The capability bits that must be set to avoid this exception are as follows :- By-copy geometry : GeometryArray.ALLOW_COORDINATE_READ
- By-reference geometry : GeometryArray.ALLOW_REF_DATA_READ
- Indexed geometry : IndexedGeometryArray.ALLOW_COORDINATE_INDEX_READ (in addition to one of the above)
- Since:
- Java 3D 1.4
- See Also:
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cloneNode
Creates a new instance of the node. This routine is called bycloneTree
to duplicate the current node.
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