Class DecalGroup
- java.lang.Object
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- javax.media.j3d.SceneGraphObject
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- javax.media.j3d.Node
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- javax.media.j3d.Group
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- javax.media.j3d.OrderedGroup
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- javax.media.j3d.DecalGroup
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public class DecalGroup extends OrderedGroup
The DecalGroup node is an ordered group node used for defining decal geometry on top of other geometry. The DecalGroup node specifies that its children should be rendered in index order and that they generate coplanar objects. Examples of this include: painted decals or text on surfaces, a checkerboard layered on top of a table, etc.The first child, at index 0, defines the surface on top of which all other children are rendered. The geometry of this child must encompass all other children, otherwise incorrect rendering may result. The polygons contained within each of the children must be facing the same way. If the polygons defined by the first child are front facing, then all other surfaces should be front facing. In this case, the polygons are rendered in order. The renderer can use knowledge of the coplanar nature of the surfaces to avoid Z-buffer collisions. If the main surface is back facing then all other surfaces should be back facing, and need not be rendered (even if back face culling is disabled).
Note that using the DecalGroup node does not guarantee that Z-buffer collisions are avoided. An implementation of Java 3D may fall back to treating DecalGroup node as an OrderedGroup node.
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Field Summary
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Fields inherited from class javax.media.j3d.OrderedGroup
ALLOW_CHILD_INDEX_ORDER_READ, ALLOW_CHILD_INDEX_ORDER_WRITE
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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
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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 Constructor Description DecalGroup()
Constructs and initializes a new DecalGroup node object.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Node
cloneNode(boolean forceDuplicate)
Used to create a new instance of the node.-
Methods inherited from class javax.media.j3d.OrderedGroup
addChild, addChild, getChildIndexOrder, insertChild, moveTo, removeAllChildren, removeChild, removeChild, setChildIndexOrder
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Methods inherited from class javax.media.j3d.Group
getAllChildren, getAlternateCollisionTarget, getChild, getCollisionBounds, indexOfChild, numChildren, setAlternateCollisionTarget, setChild, setCollisionBounds
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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
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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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Method Detail
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cloneNode
public Node cloneNode(boolean forceDuplicate)
Used to create a new instance of the node. This routine is called bycloneTree
to duplicate the current node.- Overrides:
cloneNode
in classOrderedGroup
- Parameters:
forceDuplicate
- when set totrue
, causes theduplicateOnCloneTree
flag to be ignored. Whenfalse
, the value of each node'sduplicateOnCloneTree
variable determines whether NodeComponent data is duplicated or copied.- See Also:
Node.cloneTree()
,Node.cloneNode(boolean)
,Node.duplicateNode(javax.media.j3d.Node, boolean)
,NodeComponent.setDuplicateOnCloneTree(boolean)
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