Base class for all graphs More...

Detailed Description

Base class for all graphs

Public Member Functions
virtual void	Awake ()
	This will be called on the same time as Awake on the gameObject which the AstarPath script is attached to.

virtual int	CountNodes ()
	Count nodes in the graph.

virtual void	CreateNodes (int number)
	Creates a number of nodes with the correct type for the graph.

virtual void	DeserializeExtraInfo (GraphSerializationContext ctx)
	Deserializes graph type specific node data.

NNInfo	GetNearest (Vector3 position)
	Returns the nearest node to a position using the default NNConstraint.

NNInfo	GetNearest (Vector3 position, NNConstraint constraint)
	Returns the nearest node to a position using the specified NNConstraint.

virtual NNInfo	GetNearest (Vector3 position, NNConstraint constraint, GraphNode hint)
	Returns the nearest node to a position using the specified NNConstraint.

virtual NNInfo	GetNearestForce (Vector3 position, NNConstraint constraint)
	Returns the nearest node to a position using the specified constraint.

abstract void	GetNodes (GraphNodeDelegateCancelable del)
	Calls a delegate with all nodes in the graph.

virtual Color	NodeColor (GraphNode node, PathHandler data)

virtual void	OnDestroy ()
	Function for cleaning up references.

virtual void	OnDrawGizmos (bool drawNodes)

virtual void	PostDeserialization ()
	Called after all deserialization has been done for all graphs.

virtual void	RelocateNodes (Matrix4x4 oldMatrix, Matrix4x4 newMatrix)
	Relocates the nodes in this graph.

void	SafeOnDestroy ()
	SafeOnDestroy should be used when there is a risk that the pathfinding is searching through this graph when called.

void	Scan ()

void	ScanGraph ()
	Consider using AstarPath.Scan () instead since this function might screw things up if there is more than one graph.

void	ScanInternal ()

abstract void	ScanInternal (OnScanStatus statusCallback)
	Scans the graph, called from AstarPath.ScanInternal Override this function to implement custom scanning logic The statusCallback may be optionally called to show progress info in the editor

virtual void	SerializeExtraInfo (GraphSerializationContext ctx)
	Serializes graph type specific node data.

void	SetMatrix (Matrix4x4 m)
	Use to set both matrix and inverseMatrix at the same time.

Static Public Member Functions
static bool	InSearchTree (GraphNode node, Path path)
	Returns if the node is in the search tree of the path.

Public Attributes
byte[]	_sguid
	Used to store the guid value.

AstarPath	active
	Reference to the AstarPath object in the scene.

bool	drawGizmos = true

uint	graphIndex
	Index of the graph, used for identification purposes.

bool	infoScreenOpen
	Used in the editor to check if the info screen is open.

uint	initialPenalty = 0

Matrix4x4	inverseMatrix
	Inverse of matrix.

Matrix4x4	matrix
	A matrix for translating/rotating/scaling the graph.

string	name

bool	open
	Is the graph open in the editor

Properties
Guid	guid `[get, set]`
	Used as an ID of the graph, considered to be unique.

Member Function Documentation

virtual void Awake ( )

virtual

This will be called on the same time as Awake on the gameObject which the AstarPath script is attached to.

(remember, not in the editor) Use this for any initialization code which can't be placed in Scan

virtual int CountNodes ( )

virtual

Count nodes in the graph.

Note that this is, unless the graph type has overriden it, an O(n) operation.

Todo:: GridGraph should override this

virtual void CreateNodes ( int number )

virtual

Creates a number of nodes with the correct type for the graph.

This should not set the #nodes array, only return the nodes. Called by graph generators and when deserializing a graph with nodes. Override this function if you do not use the default Pathfinding.Node class.

Reimplemented in RecastGraph, and NavMeshGraph.

virtual void DeserializeExtraInfo ( GraphSerializationContext ctx )

virtual

Deserializes graph type specific node data.

See Also: SerializeExtraInfo

Reimplemented in RecastGraph, GridGraph, LayerGridGraph, NavMeshGraph, and PointGraph.

NNInfo GetNearest ( Vector3 position )

Returns the nearest node to a position using the default NNConstraint.

Parameters

position The position to try to find a close node to

See Also: Pathfinding.NNConstraint.None

NNInfo GetNearest	(	Vector3	position,
		NNConstraint	constraint
	)

Returns the nearest node to a position using the specified NNConstraint.

Parameters

position	The position to try to find a close node to
constraint	Can for example tell the function to try to return a walkable node. If you do not get a good node back, consider calling GetNearestForce.

virtual NNInfo GetNearest	(	Vector3	position,
		NNConstraint	constraint,
		GraphNode	hint
	)

virtual

Returns the nearest node to a position using the specified NNConstraint.

Parameters

position	The position to try to find a close node to
hint	Can be passed to enable some graph generators to find the nearest node faster.
constraint	Can for example tell the function to try to return a walkable node. If you do not get a good node back, consider calling GetNearestForce.

Reimplemented in LayerGridGraph, RecastGraph, GridGraph, NavMeshGraph, and PointGraph.

virtual NNInfo GetNearestForce	(	Vector3	position,
		NNConstraint	constraint
	)

virtual

Returns the nearest node to a position using the specified constraint.

Parameters

position	A Vector3
constraint	A NNConstraint

Returns: A NNInfo. This function will only return an empty NNInfo if there is no nodes which comply with the specified constraint.

Reimplemented in LayerGridGraph, RecastGraph, GridGraph, NavMeshGraph, and PointGraph.

abstract void GetNodes ( GraphNodeDelegateCancelable del )

pure virtual

Calls a delegate with all nodes in the graph.

This is the primary way of "looping" through all nodes in a graph.

This function should not change anything in the graph structure.

Implemented in RecastGraph, PointGraph, GridGraph, NavMeshGraph, LayerGridGraph, QuadtreeGraph, and SimpleGraph.

static bool InSearchTree	(	GraphNode	node,
		Path	path
	)

static

Returns if the node is in the search tree of the path.

Only guaranteed to be correct if path is the latest path calculated. Use for gizmo drawing only.

virtual Color NodeColor	(	GraphNode	node,
		PathHandler	data
	)

virtual

virtual void OnDestroy ( )

virtual

Function for cleaning up references.

This will be called on the same time as OnDisable on the gameObject which the AstarPath script is attached to (remember, not in the editor). Use for any cleanup code such as cleaning up static variables which otherwise might prevent resources from being collected. Use by creating a function overriding this one in a graph class, but always call base.OnDestroy () in that function. All nodes should be destroyed in this function otherwise a memory leak will arise.

Reimplemented in RecastGraph, NavMeshGraph, GridGraph, and LayerGridGraph.

virtual void OnDrawGizmos ( bool drawNodes )

virtual

Reimplemented in RecastGraph, LayerGridGraph, GridGraph, NavMeshGraph, and QuadtreeGraph.

virtual void PostDeserialization ( )

virtual

Called after all deserialization has been done for all graphs.

Can be used to set up more graph data which is not serialized

Reimplemented in GridGraph, LayerGridGraph, and PointGraph.

virtual void RelocateNodes	(	Matrix4x4	oldMatrix,
		Matrix4x4	newMatrix
	)

virtual

Relocates the nodes in this graph.

Assumes the nodes are translated using the "oldMatrix", then translates them according to the "newMatrix". The "oldMatrix" is not required by all implementations of this function though (e.g the NavMesh generator).

Bug:: Does not always work for Grid Graphs, see http://www.arongranberg.com/forums/topic/relocate-nodes-fix/

Warning: The default implementation assumes the graph is using nodes which implement the IPositionedNode interface Custom graphs which do not use such a node type must implement an override to this function (possibly throwing a NotSupportedException)

Reimplemented in PointGraph, and NavMeshGraph.

void SafeOnDestroy ( )

SafeOnDestroy should be used when there is a risk that the pathfinding is searching through this graph when called.

void Scan ( )

void ScanGraph ( )

Consider using AstarPath.Scan () instead since this function might screw things up if there is more than one graph.

This function does not perform all necessary postprocessing for the graph to work with pathfinding (e.g flood fill). See the source of the AstarPath.Scan function to see how it can be used.

In almost all cases you should use AstarPath.Scan instead.

void ScanInternal ( )

abstract void ScanInternal ( OnScanStatus statusCallback )

pure virtual

Scans the graph, called from AstarPath.ScanInternal Override this function to implement custom scanning logic The statusCallback may be optionally called to show progress info in the editor

Implemented in RecastGraph, GridGraph, NavMeshGraph, PointGraph, LayerGridGraph, QuadtreeGraph, and SimpleGraph.

virtual void SerializeExtraInfo ( GraphSerializationContext ctx )

virtual

Serializes graph type specific node data.

This function can be overriden to serialize extra node information (or graph information for that matter) which cannot be serialized using the standard serialization. Serialize the data in any way you want and return a byte array. When loading, the exact same byte array will be passed to the DeserializeExtraInfo function.
These functions will only be called if node serialization is enabled.

Reimplemented in RecastGraph, GridGraph, LayerGridGraph, NavMeshGraph, and PointGraph.

void SetMatrix ( Matrix4x4 m )

Use to set both matrix and inverseMatrix at the same time.

Member Data Documentation

byte [] _sguid

Used to store the guid value.

See Also: NavGraph.guid

AstarPath active

Reference to the AstarPath object in the scene.

Might not be entirely safe to use, it's better to use AstarPath.active

bool drawGizmos = true

uint graphIndex

Index of the graph, used for identification purposes.

bool infoScreenOpen

Used in the editor to check if the info screen is open.

Should be inside UNITY_EDITOR only #ifs but just in case anyone tries to serialize a NavGraph instance using Unity, I have left it like this as it would otherwise cause a crash when building. Version 3.0.8.1 was released because of this bug only

uint initialPenalty = 0

Matrix4x4 inverseMatrix

Inverse of matrix.

Note: Do not set directly, use SetMatrix

Matrix4x4 matrix

A matrix for translating/rotating/scaling the graph.

Not all graph generators sets this variable though.

Note: Do not set directly, use SetMatrix

string name

bool open

Is the graph open in the editor

Property Documentation

Guid guid

getset

Used as an ID of the graph, considered to be unique.

Note: This is Pathfinding.Util.Guid not System.Guid. A replacement for System.Guid was coded for better compatibility with iOS

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

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

Detailed Description

Public Member Functions

Static Public Member Functions

Public Attributes

Properties

Member Function Documentation

Member Data Documentation

Property Documentation