Axis Aligned Bounding Box Tree. More...

Detailed Description

Axis Aligned Bounding Box Tree.

Holds a bounding box tree of triangles.
Performance: Insertion - Practically O(1) - About 0.003 ms

A* Pro Feature:: This is an A* Pathfinding Project Pro feature only. This function/class/variable might not exist in the Free version of the A* Pathfinding Project or the functionality might be limited
The Pro version can be bought here

Classes
struct	BBTreeBox

Public Member Functions
	BBTree (INavmeshHolder graph)

void	Clear ()
	Clear the tree.

void	Insert (MeshNode node)
	Inserts a mesh node in the tree.

void	OnDrawGizmos ()

NNInfo	Query (Vector3 p, NNConstraint constraint)

NNInfo	QueryCircle (Vector3 p, float radius, NNConstraint constraint)
	Queries the tree for the best node, searching within a circle around p with the specified radius.

NNInfo	QueryClosest (Vector3 p, NNConstraint constraint, out float distance)
	Queries the tree for the closest node to p constrained by the NNConstraint.

NNInfo	QueryClosest (Vector3 p, NNConstraint constraint, ref float distance, NNInfo previous)
	Queries the tree for the closest node to p constrained by the NNConstraint trying to improve an existing solution.

NNInfo	QueryClosestXZ (Vector3 p, NNConstraint constraint, ref float distance, NNInfo previous)
	Queries the tree for the closest node to p constrained by the NNConstraint trying to improve an existing solution.

MeshNode	QueryInside (Vector3 p, NNConstraint constraint)

Public Attributes
INavmeshHolder	graph

Properties
Rect	Size `[get]`

Private Member Functions
void	EnsureCapacity (int c)

int	GetBox (MeshNode node)

void	OnDrawGizmos (int boxi, int depth)

void	SearchBox (int boxi, Vector3 p, NNConstraint constraint, ref NNInfo nnInfo)

void	SearchBoxCircle (int boxi, Vector3 p, float radius, NNConstraint constraint, ref NNInfo nnInfo)

void	SearchBoxClosest (int boxi, Vector3 p, ref float closestDist, NNConstraint constraint, ref NNInfo nnInfo)

void	SearchBoxClosestXZ (int boxi, Vector3 p, ref float closestDist, NNConstraint constraint, ref NNInfo nnInfo)

MeshNode	SearchBoxInside (int boxi, Vector3 p, NNConstraint constraint)

Static Private Member Functions
static Rect	ExpandToContain (Rect r, Rect r2)
	Returns a new rect which contains both r and r2.

static float	ExpansionRequired (Rect r, Rect r2)
	Returns the difference in area between r and r expanded to contain r2.

static bool	NodeIntersectsCircle (MeshNode node, Vector3 p, float radius)

static float	RectArea (Rect r)
	Returns the area of a rect.

static bool	RectContains (Rect r, Vector3 p)
	Returns if a rect contains the 3D point in XZ space.

static bool	RectIntersectsCircle (Rect r, Vector3 p, float radius)
	Returns true if p is within radius from r.

Private Attributes
BBTreeBox[]	arr = new BBTreeBox[6]
	Holds an Axis Aligned Bounding Box Tree used for faster node lookups.

int	count = 0

Constructor & Destructor Documentation

BBTree ( INavmeshHolder graph )

Member Function Documentation

void Clear ( )

Clear the tree.

Note that references to old nodes will still be intact so the GC cannot immediately collect them.

void EnsureCapacity ( int c )

private

static Rect ExpandToContain	(	Rect	r,
		Rect	r2
	)

staticprivate

Returns a new rect which contains both r and r2.

static float ExpansionRequired	(	Rect	r,
		Rect	r2
	)

staticprivate

Returns the difference in area between r and r expanded to contain r2.

int GetBox ( MeshNode node )

private

void Insert ( MeshNode node )

Inserts a mesh node in the tree.

static bool NodeIntersectsCircle	(	MeshNode	node,
		Vector3	p,
		float	radius
	)

staticprivate

void OnDrawGizmos ( )

void OnDrawGizmos	(	int	boxi,
		int	depth
	)

private

NNInfo Query	(	Vector3	p,
		NNConstraint	constraint
	)

NNInfo QueryCircle	(	Vector3	p,
		float	radius,
		NNConstraint	constraint
	)

Queries the tree for the best node, searching within a circle around p with the specified radius.

Will fill in both the constrained node and the not constrained node in the NNInfo.

See Also: QueryClosest

NNInfo QueryClosest	(	Vector3	p,
		NNConstraint	constraint,
		out float	distance
	)

Queries the tree for the closest node to p constrained by the NNConstraint.

Note that this function will, unlike QueryCircle, only fill in the constrained node. If you want a node not constrained by any NNConstraint, do an additional search with constraint = NNConstraint.None

See Also: QueryCircle

NNInfo QueryClosest	(	Vector3	p,
		NNConstraint	constraint,
		ref float	distance,
		NNInfo	previous
	)

Queries the tree for the closest node to p constrained by the NNConstraint trying to improve an existing solution.

Note that this function will, unlike QueryCircle, only fill in the constrained node. If you want a node not constrained by any NNConstraint, do an additional search with constraint = NNConstraint.None

This search will start from the previous NNInfo and improve it if possible. Even if the search fails on this call, the solution will never be worse than previous.

Parameters

distance The best distance for the previous solution. Will be updated with the best distance after this search. Will be positive infinity if no node could be found. Set to positive infinity if there was no previous solution.

See Also: QueryCircle

NNInfo QueryClosestXZ	(	Vector3	p,
		NNConstraint	constraint,
		ref float	distance,
		NNInfo	previous
	)

Queries the tree for the closest node to p constrained by the NNConstraint trying to improve an existing solution.

Note that this function will, unlike QueryCircle, only fill in the constrained node. If you want a node not constrained by any NNConstraint, do an additional search with constraint = NNConstraint.None

This search will start from the previous NNInfo and improve it if possible. Even if the search fails on this call, the solution will never be worse than previous.

This method will completely ignore any Y-axis differences in positions.

Parameters

distance The best distance for the previous solution. Will be updated with the best distance after this search. Will be positive infinity if no node could be found. Set to positive infinity if there was no previous solution.

See Also: QueryCircle

MeshNode QueryInside	(	Vector3	p,
		NNConstraint	constraint
	)

static float RectArea ( Rect r )

staticprivate

Returns the area of a rect.

static bool RectContains	(	Rect	r,
		Vector3	p
	)

staticprivate

Returns if a rect contains the 3D point in XZ space.

static bool RectIntersectsCircle	(	Rect	r,
		Vector3	p,
		float	radius
	)

staticprivate

Returns true if p is within radius from r.

Correctly handles cases where radius is positive infinity.

void SearchBox	(	int	boxi,
		Vector3	p,
		NNConstraint	constraint,
		ref NNInfo	nnInfo
	)

private

void SearchBoxCircle	(	int	boxi,
		Vector3	p,
		float	radius,
		NNConstraint	constraint,
		ref NNInfo	nnInfo
	)

private

void SearchBoxClosest	(	int	boxi,
		Vector3	p,
		ref float	closestDist,
		NNConstraint	constraint,
		ref NNInfo	nnInfo
	)

private

void SearchBoxClosestXZ	(	int	boxi,
		Vector3	p,
		ref float	closestDist,
		NNConstraint	constraint,
		ref NNInfo	nnInfo
	)

private

MeshNode SearchBoxInside	(	int	boxi,
		Vector3	p,
		NNConstraint	constraint
	)

private

Member Data Documentation

BBTreeBox [] arr = new BBTreeBox[6]

private

Holds an Axis Aligned Bounding Box Tree used for faster node lookups.

A* Pro Feature:: This is an A* Pathfinding Project Pro feature only. This function/class/variable might not exist in the Free version of the A* Pathfinding Project or the functionality might be limited
The Pro version can be bought here

int count = 0

private

INavmeshHolder graph

Property Documentation

Rect Size

get

The documentation for this class was generated from the following file:

/Users/arong/Unity/a-pathfinding-project/Assets/AstarPathfindingProject/Generators/Utilities/BBTree.cs

Detailed Description

Classes

Public Member Functions

Public Attributes

Properties

Private Member Functions

Static Private Member Functions

Private Attributes

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

Property Documentation