org.j3d.renderer.aviatrix3d.nodes
Class MarkerGroup

java.lang.Object
  org.j3d.aviatrix3d.SceneGraphObject
      org.j3d.aviatrix3d.Node
          org.j3d.aviatrix3d.BaseNode
              org.j3d.aviatrix3d.BaseGroup
                  org.j3d.renderer.aviatrix3d.nodes.MarkerGroup

All Implemented Interfaces:

Cullable, CustomCullable, TransformHierarchy

public class MarkerGroup
extends BaseGroup
implements CustomCullable

A grouping node that places it's children in the line of site between a target node and the viewpoint, oriented towards the viewpoint.

In order to use this node effectively, you will need to use the FrustumCullStage to process the children. It uses custom culling routines internally and that is the only cull stage that will do something useful with ths node.

Version:

$Revision: 1.2 $

Author:

Rex Melton

Field Summary

Fields inherited from class org.j3d.aviatrix3d.BaseGroup

childList, dirtyBoundsCount, lastChild, wkVec1, wkVec2

Fields inherited from class org.j3d.aviatrix3d.Node

bounds, implicitBounds, INVALID_BOUNDS, parent

Fields inherited from class org.j3d.aviatrix3d.SceneGraphObject

alive, LISTENER_SET_TIMING_ERR_PROP, updateHandler

Constructor Summary

MarkerGroup()
Constructor

Method Summary

void	cullChildren(CullInstructions output, javax.vecmath.Matrix4f vworldTx, javax.vecmath.Matrix4f viewTransform, javax.vecmath.Vector4f[] frustumPlanes, float angularRes) Check this node for children to traverse.
void	setEnabled(boolean enabled) Set the enabled state
void	setTarget(Node target) Set the node to track

Methods inherited from class org.j3d.aviatrix3d.BaseGroup

addChild, checkForCyclicChild, getAllChildren, getChild, indexOfChild, markBoundsDirty, numChildren, recomputeBounds, removeAllChildren, removeChild, removeChild, requestBoundsUpdate, setBounds, setChild, setLive, setUpdateHandler, updateBounds

Methods inherited from class org.j3d.aviatrix3d.BaseNode

checkForCyclicChild, checkForCyclicParent, clearUpdateHandler, removeParent, setLive, setParent, setUpdateHandler

Methods inherited from class org.j3d.aviatrix3d.Node

boundsChanged, checkForCyclicParent, getBounds, getParent, removeParent, setParent, updateParentBounds

Methods inherited from class org.j3d.aviatrix3d.SceneGraphObject

dataChanged, getAppUpdateWriteTimingMessage, getBoundsWriteTimingMessage, getDataWriteTimingMessage, getUserData, isLive, setUserData

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MarkerGroup

public MarkerGroup()

Constructor

Method Detail

cullChildren

public void cullChildren(CullInstructions output,
                         javax.vecmath.Matrix4f vworldTx,
                         javax.vecmath.Matrix4f viewTransform,
                         javax.vecmath.Vector4f[] frustumPlanes,
                         float angularRes)

Check this node for children to traverse. The angular resolution is defined as Field Of View (in radians) / viewport width in pixels.

Specified by:

cullChildren in interface CustomCullable

Parameters:

output - Fill in the child information here

vworldTx - The transformation from the root of the scene to this node according to the current traversal path

viewTransform - The transformation from the root of the scene graph to the active viewpoint

frustumPlanes - Listing of frustum planes in the order: right, left, bottom, top, far, near

angularRes - Angular resolution of the screen, or 0 if not calculable from the available data.

setEnabled

public void setEnabled(boolean enabled)

Set the enabled state

Parameters:

enabled - The enabled state

setTarget

public void setTarget(Node target)

Set the node to track

Parameters:

target - The Node to track