org.j3d.terrain.roam

Class TreeNode

java.lang.Object

org.j3d.terrain.roam.TreeNode

public class TreeNode
extends Object

Represents a single node of the triangle mesh of the patch.

A triangle is represented by the three sides described as left, right and base. This triangle is connected to neighbour triangles through these references and form part of the ROAM code. A triangle is defined in terms of an apex coordinate and left and right then based on the coordinates supplied. left and right do not necessarily correspond to real world left/right as you look down on the terrain.

Version:

$Revision: 2.4 $

Author:

Paul Byrne, Justin Couch

Field Summary

Fields

Modifier and Type	Field and Description
static int	BASE_TO_BASE Base to base orientation of the edge split routine
static int	LEFT_TO_RIGHT Left to right orientation of the edge split routine
static int	RIGHT_TO_LEFT right to left orientation of the edge split routine
static int	UNDEFINED The visibility status of this node in the tree is not known.

Method Summary

Modifier and Type	Method and Description
static TreeNode	getTreeNode() Either return a node from the cache or if the cache is empty, return a new tree node.
int	getVisibility() Get the visibility state of this node.

Methods inherited from class java.lang.Object

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

Field Detail

UNDEFINED

public static final int UNDEFINED

The visibility status of this node in the tree is not known.

See Also:

Constant Field Values

BASE_TO_BASE

public static final int BASE_TO_BASE

Base to base orientation of the edge split routine

See Also:

Constant Field Values

LEFT_TO_RIGHT

public static final int LEFT_TO_RIGHT

Left to right orientation of the edge split routine

See Also:

Constant Field Values

RIGHT_TO_LEFT

public static final int RIGHT_TO_LEFT

right to left orientation of the edge split routine

See Also:

Constant Field Values

Method Detail

getVisibility

public int getVisibility()

Get the visibility state of this node.

getTreeNode

public static TreeNode getTreeNode()

Either return a node from the cache or if the cache is empty, return a new tree node.