Octree datastructure for managing scene nodes. More...

#include <OgreOctreeZoneOctree.h>

Inheritance diagram for Ogre::Octree:

Public Types
typedef std::vector< OctreeNode * >	NodeList

Public Member Functions
	Octree (Octree *p)

	Octree (PCZone zone, Octree p)

	~Octree ()

	~Octree ()

void	_addNode (OctreeNode *)
	Adds an Octree scene node to this octree level.

void	_addNode (PCZSceneNode *)
	Adds an PCZscene node to this octree level.

void	_findNodes (const AxisAlignedBox &t, PCZSceneNodeList &list, PCZSceneNode *exclude, bool includeVisitors, bool full)

void	_findNodes (const PlaneBoundedVolume &t, PCZSceneNodeList &list, PCZSceneNode *exclude, bool includeVisitors, bool full)

void	_findNodes (const Ray &t, PCZSceneNodeList &list, PCZSceneNode *exclude, bool includeVisitors, bool full)

void	_findNodes (const Sphere &t, PCZSceneNodeList &list, PCZSceneNode *exclude, bool includeVisitors, bool full)

void	_getChildIndexes (const AxisAlignedBox &, int x, int y, int *z) const
	Returns the appropriate indexes for the child of this octree into which the box will fit.

void	_getChildIndexes (const AxisAlignedBox &, int x, int y, int *z) const
	Returns the appropriate indexes for the child of this octree into which the box will fit.

void	_getCullBounds (AxisAlignedBox *) const
	Creates the AxisAlignedBox used for culling this octree.

void	_getCullBounds (AxisAlignedBox *) const
	Creates the AxisAlignedBox used for culling this octree.

bool	_isTwiceSize (const AxisAlignedBox &box) const
	Determines if this octree is twice as big as the given box.

bool	_isTwiceSize (const AxisAlignedBox &box) const
	Determines if this octree is twice as big as the given box.

void	_removeNode (OctreeNode *)
	Removes an Octree scene node to this octree level.

void	_removeNode (PCZSceneNode *)
	Removes an PCZscene node to this octree level.

WireBoundingBox *	getWireBoundingBox ()
	Creates the wire frame bounding box for this octant.

WireBoundingBox *	getWireBoundingBox ()
	Creates the wire frame bounding box for this octant.

int	numNodes ()
	Returns the number of scene nodes attached to this octree.

int	numNodes ()
	Returns the number of scene nodes attached to this octree.

Public Attributes
AxisAlignedBox	mBox
	The bounding box of the octree.

Octree *	mChildren [2][2][2]
	3D array of children of this octree.

Vector3	mHalfSize
	Vector containing the dimensions of this octree / 2.

NodeList	mNodes
	Public list of SceneNodes attached to this particular octree.

PCZSceneNodeList	mNodes
	Public list of SceneNodes attached to this particular octree.

WireBoundingBox *	mWireBoundingBox

PCZone *	mZone

Detailed Description

Octree datastructure for managing scene nodes.

This is a loose octree implementation, meaning that each octant child of the octree actually overlaps it's siblings by a factor of .5. This guarantees that any thing that is half the size of the parent will fit completely into a child, with no splitting necessary.

Member Typedef Documentation

◆ NodeList

typedef std::vector< OctreeNode * > Ogre::Octree::NodeList

Constructor & Destructor Documentation

◆ Octree() [1/2]

Ogre::Octree::Octree ( Octree * p )

◆ ~Octree() [1/2]

Ogre::Octree::~Octree ( )

◆ Octree() [2/2]

Ogre::Octree::Octree	(	PCZone *	zone,
		Octree *	p
	)

◆ ~Octree() [2/2]

Ogre::Octree::~Octree ( )

Member Function Documentation

◆ _addNode() [1/2]

void Ogre::Octree::_addNode ( OctreeNode * )

Adds an Octree scene node to this octree level.

This is called by the OctreeSceneManager after it has determined the correct Octree to insert the node into.

◆ _removeNode() [1/2]

void Ogre::Octree::_removeNode ( OctreeNode * )

Removes an Octree scene node to this octree level.

◆ numNodes() [1/2]

int Ogre::Octree::numNodes ( )

inline

Returns the number of scene nodes attached to this octree.

◆ getWireBoundingBox() [1/2]

WireBoundingBox * Ogre::Octree::getWireBoundingBox ( )

Creates the wire frame bounding box for this octant.

◆ _isTwiceSize() [1/2]

bool Ogre::Octree::_isTwiceSize ( const AxisAlignedBox & box ) const

Determines if this octree is twice as big as the given box.

This method is used by the OctreeSceneManager to determine if the given box will fit into a child of this octree.

◆ _getChildIndexes() [1/2]

void Ogre::Octree::_getChildIndexes	(	const AxisAlignedBox &	,
		int *	x,
		int *	y,
		int *	z
	)		const

Returns the appropriate indexes for the child of this octree into which the box will fit.

This is used by the OctreeSceneManager to determine which child to traverse next when finding the appropriate octree to insert the box. Since it is a loose octree, only the center of the box is checked to determine the octant.

◆ _getCullBounds() [1/2]

void Ogre::Octree::_getCullBounds ( AxisAlignedBox * ) const

Creates the AxisAlignedBox used for culling this octree.

Since it's a loose octree, the culling bounds can be different than the actual bounds of the octree.

◆ _addNode() [2/2]

void Ogre::Octree::_addNode ( PCZSceneNode * )

Adds an PCZscene node to this octree level.

This is called by the OctreeZone after it has determined the correct Octree to insert the node into.

◆ _removeNode() [2/2]

void Ogre::Octree::_removeNode ( PCZSceneNode * )

Removes an PCZscene node to this octree level.

◆ numNodes() [2/2]

int Ogre::Octree::numNodes ( )

inline

Returns the number of scene nodes attached to this octree.

◆ getWireBoundingBox() [2/2]

WireBoundingBox * Ogre::Octree::getWireBoundingBox ( )

Creates the wire frame bounding box for this octant.

◆ _isTwiceSize() [2/2]

bool Ogre::Octree::_isTwiceSize ( const AxisAlignedBox & box ) const

Determines if this octree is twice as big as the given box.

This method is used by the OctreeSceneManager to determine if the given box will fit into a child of this octree.

◆ _getChildIndexes() [2/2]

void Ogre::Octree::_getChildIndexes	(	const AxisAlignedBox &	,
		int *	x,
		int *	y,
		int *	z
	)		const

Returns the appropriate indexes for the child of this octree into which the box will fit.

This is used by the OctreeSceneManager to determine which child to traverse next when finding the appropriate octree to insert the box. Since it is a loose octree, only the center of the box is checked to determine the octant.

◆ _getCullBounds() [2/2]

void Ogre::Octree::_getCullBounds ( AxisAlignedBox * ) const

Creates the AxisAlignedBox used for culling this octree.

Since it's a loose octree, the culling bounds can be different than the actual bounds of the octree.

◆ _findNodes() [1/4]

void Ogre::Octree::_findNodes	(	const AxisAlignedBox &	t,
		PCZSceneNodeList &	list,
		PCZSceneNode *	exclude,
		bool	includeVisitors,
		bool	full
	)

◆ _findNodes() [2/4]

void Ogre::Octree::_findNodes	(	const Ray &	t,
		PCZSceneNodeList &	list,
		PCZSceneNode *	exclude,
		bool	includeVisitors,
		bool	full
	)

◆ _findNodes() [3/4]

void Ogre::Octree::_findNodes	(	const Sphere &	t,
		PCZSceneNodeList &	list,
		PCZSceneNode *	exclude,
		bool	includeVisitors,
		bool	full
	)

◆ _findNodes() [4/4]

void Ogre::Octree::_findNodes	(	const PlaneBoundedVolume &	t,
		PCZSceneNodeList &	list,
		PCZSceneNode *	exclude,
		bool	includeVisitors,
		bool	full
	)

Member Data Documentation

◆ mBox

AxisAlignedBox Ogre::Octree::mBox

The bounding box of the octree.

This is used for octant index determination and rendering, but not culling

◆ mWireBoundingBox

WireBoundingBox * Ogre::Octree::mWireBoundingBox

◆ mHalfSize

Vector3 Ogre::Octree::mHalfSize

Vector containing the dimensions of this octree / 2.

◆ mChildren

Octree * Ogre::Octree::mChildren

3D array of children of this octree.

Children are dynamically created as needed when nodes are inserted in the Octree. If, later, all the nodes are removed from the child, it is still kept around.

◆ mNodes [1/2]

NodeList Ogre::Octree::mNodes

Public list of SceneNodes attached to this particular octree.

◆ mNodes [2/2]

PCZSceneNodeList Ogre::Octree::mNodes