Handles path calls for a single unit. More...

Detailed Description

Handles path calls for a single unit.

This is a component which is meant to be attached to a single unit (AI, Robot, Player, whatever) to handle it's pathfinding calls. It also handles post-processing of paths using modifiers.

See Also: Pathfinding interface

Examples:: AstarAI.cs, EndingCondition.cs, and MultiTargetPathExample.cs.

Public Types
enum	ModifierPass { PreProcess, PostProcessOriginal, PostProcess }

Public Member Functions
void	Awake ()
	Initializes a few variables.

IEnumerator	DelayPathStart (Path p)

void	DeregisterModifier (IPathModifier mod)

Path	GetCurrentPath ()
	Returns path.

ABPath	GetNewPath (Vector3 start, Vector3 end)
	Returns a new path instance.

bool	IsDone ()
	Is the current path done calculating.

void	OnDestroy ()
	Cleans up some variables.

void	OnDrawGizmos ()

void	OnMultiPathComplete (Path p)
	Called once for a MultiTargetPath.

void	OnPartialPathComplete (Path p)
	Called for each path in a MultiTargetPath.

void	OnPathComplete (Path p)
	Called when a path has completed.

void	OnPathComplete (Path p, bool runModifiers, bool sendCallbacks)
	Called when a path has completed.

void	PostProcess (Path p)
	Post Processes the path.

void	RegisterModifier (IPathModifier mod)

void	ReleaseClaimedPath ()
	Releases an eventual claimed path.

void	RunModifiers (ModifierPass pass, Path p)
	Runs modifiers on path p.

string	StackTrace ()

MultiTargetPath	StartMultiTargetPath (Vector3 start, Vector3[] endPoints, bool pathsForAll, OnPathDelegate callback=null, int graphMask=-1)
	Starts a Multi Target Path from one start point to multiple end points.

MultiTargetPath	StartMultiTargetPath (Vector3[] startPoints, Vector3 end, bool pathsForAll, OnPathDelegate callback=null, int graphMask=-1)
	Starts a Multi Target Path from multiple start points to a single target point.

MultiTargetPath	StartMultiTargetPath (MultiTargetPath p, OnPathDelegate callback=null, int graphMask=-1)
	Starts a Multi Target Path.

Path	StartPath (Vector3 start, Vector3 end)
	Call this function to start calculating a path.

Path	StartPath (Vector3 start, Vector3 end, OnPathDelegate callback)
	Call this function to start calculating a path.

Path	StartPath (Vector3 start, Vector3 end, OnPathDelegate callback, int graphMask)
	Call this function to start calculating a path.

Path	StartPath (Path p, OnPathDelegate callback=null, int graphMask=-1)
	Call this function to start calculating a path.

Public Attributes
bool	detailedGizmos = false

bool	drawGizmos = true

List< GraphNode >	lastCompletedNodePath

List< Vector3 >	lastCompletedVectorPath

OnPathDelegate	pathCallback
	Callback for when a path is completed.

OnPathDelegate	postProcessOriginalPath
	For anything which requires the original nodes (Node[]) (before modifiers) to work.

OnPathDelegate	postProcessPath
	Anything which only modifies the positions (Vector3[])

OnPathDelegate	preProcessPath
	Called before pathfinding is started.

bool	saveGetNearestHints = true
	Saves nearest nodes for previous path to enable faster Get Nearest Node calls.

StartEndModifier	startEndModifier = new StartEndModifier ()

int[]	tagPenalties = new int[32]
	Penalties for each tag.

TagMask	traversableTags = new TagMask (-1,-1)

Protected Attributes
uint	lastPathID = 0
	The path ID of the last path queried.

Path	path
	The current path.

Private Attributes
GraphNode	endHint

List< IPathModifier >	modifiers = new List<IPathModifier> ()

OnPathDelegate	onPartialPathDelegate

OnPathDelegate	onPathDelegate

Path	prevPath
	Previous path.

GraphNode	startHint

OnPathDelegate	tmpPathCallback
	Temporary callback only called for the current path.

Member Enumeration Documentation

enum ModifierPass

Enumerator:

PreProcess
PostProcessOriginal
PostProcess

Member Function Documentation

void Awake ( )

Initializes a few variables.

IEnumerator DelayPathStart ( Path p )

void DeregisterModifier ( IPathModifier mod )

Path GetCurrentPath ( )

Returns path.

ABPath GetNewPath	(	Vector3	start,
		Vector3	end
	)

Returns a new path instance.

The path will be taken from the path pool if path recycling is turned on.
This path can be sent to StartPath(Path,OnPathDelegate,int) with no change, but if no change is required StartPath(Vector3,Vector3,OnPathDelegate) does just that.

 Seeker seeker = GetComponent (typeof(Seeker)) as Seeker;
Path p = seeker.GetNewPath (transform.position, transform.position+transform.forward*100);
p.nnConstraint = NNConstraint.Default; 

bool IsDone ( )

Is the current path done calculating.

Returns true if the current path has been returned or if the path is null.

Note: Do not confuse this with Pathfinding.Path.IsDone. They do mostly return the same value, but not always.

Since: Added in 3.0.8

Version: Behaviour changed in 3.2

void OnDestroy ( )

Cleans up some variables.

Releases any eventually claimed paths. Calls OnDestroy on the startEndModifier.

See Also: ReleaseClaimedPath; startEndModifier

void OnDrawGizmos ( )

void OnMultiPathComplete ( Path p )

Called once for a MultiTargetPath.

Only returns the path, does not post process.

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

void OnPartialPathComplete ( Path p )

Called for each path in a MultiTargetPath.

Only post processes the path, does not return it.

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

void OnPathComplete ( Path p )

Called when a path has completed.

This should have been implemented as optional parameter values, but that didn't seem to work very well with delegates (the values weren't the default ones)

See Also: OnPathComplete(Path,bool,bool)

void OnPathComplete	(	Path	p,
		bool	runModifiers,
		bool	sendCallbacks
	)

Called when a path has completed.

Will post process it and return it by calling tmpPathCallback and pathCallback

void PostProcess ( Path p )

Post Processes the path.

This will run any modifiers attached to this GameObject on the path. This is identical to calling RunModifiers(ModifierPass.PostProcess, path)

See Also: RunModifiers

Since: Added in 3.2

void RegisterModifier ( IPathModifier mod )

void ReleaseClaimedPath ( )

Releases an eventual claimed path.

The seeker keeps the latest path claimed so it can draw gizmos. In some cases this might not be desireable and you want it released. In that case, you can call this method to release it (not that path gizmos will then not be drawn).

If you didn't understand anything from the description above, you probably don't need to use this method.

void RunModifiers	(	ModifierPass	pass,
		Path	p
	)

Runs modifiers on path p.

string StackTrace ( )

MultiTargetPath StartMultiTargetPath	(	Vector3	start,
		Vector3[]	endPoints,
		bool	pathsForAll,
		OnPathDelegate	callback = `null`,
		int	graphMask = `-1`
	)

Starts a Multi Target Path from one start point to multiple end points.

A Multi Target Path will search for all the end points in one search and will return all paths if pathsForAll is true, or only the shortest one if pathsForAll is false.

Parameters

start	The start point of the path
endPoints	The end points of the path
pathsForAll	Indicates whether or not a path to all end points should be searched for or only to the closest one
callback	The function to call when the path has been calculated
graphMask	Mask used to specify which graphs should be searched for close nodes. See Pathfinding.NNConstraint.graphMask. *A Pro Feature:** This parameter does not exist or has limited functionality in the Free version of the A* Pathfinding Project

callback and pathCallback will be called when the path has completed. Callback will not be called if the path is canceled (e.g when a new path is requested before the previous one has completed)

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

See Also: Pathfinding.MultiTargetPath; Example of how to use multi-target-paths

MultiTargetPath StartMultiTargetPath	(	Vector3[]	startPoints,
		Vector3	end,
		bool	pathsForAll,
		OnPathDelegate	callback = `null`,
		int	graphMask = `-1`
	)

Starts a Multi Target Path from multiple start points to a single target point.

A Multi Target Path will search from all start points to the target point in one search and will return all paths if pathsForAll is true, or only the shortest one if pathsForAll is false.

Parameters

startPoints	The start points of the path
end	The end point of the path
pathsForAll	Indicates whether or not a path from all start points should be searched for or only to the closest one
callback	The function to call when the path has been calculated
graphMask	Mask used to specify which graphs should be searched for close nodes. See Pathfinding.NNConstraint.graphMask. *A Pro Feature:** This parameter does not exist or has limited functionality in the Free version of the A* Pathfinding Project

callback and pathCallback will be called when the path has completed. Callback will not be called if the path is canceled (e.g when a new path is requested before the previous one has completed)

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

See Also: Pathfinding.MultiTargetPath; Example of how to use multi-target-paths

MultiTargetPath StartMultiTargetPath	(	MultiTargetPath	p,
		OnPathDelegate	callback = `null`,
		int	graphMask = `-1`
	)

Starts a Multi Target Path.

Takes a MultiTargetPath and wires everything up for it to send callbacks to the seeker for post-processing.

Parameters

p	The path to start calculating
callback	The function to call when the path has been calculated
graphMask	Mask used to specify which graphs should be searched for close nodes. See Pathfinding.NNConstraint.graphMask. *A Pro Feature:** This parameter does not exist or has limited functionality in the Free version of the A* Pathfinding Project

callback and pathCallback will be called when the path has completed. Callback will not be called if the path is canceled (e.g when a new path is requested before the previous one has completed)

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

See Also: Pathfinding.MultiTargetPath; Example of how to use multi-target-paths

Path StartPath	(	Vector3	start,
		Vector3	end
	)

Call this function to start calculating a path.

Parameters

start	The start point of the path
end	The end point of the path

Examples:: AstarAI.cs, and EndingCondition.cs.

Path StartPath	(	Vector3	start,
		Vector3	end,
		OnPathDelegate	callback
	)

Call this function to start calculating a path.

Parameters

start	The start point of the path
end	The end point of the path
callback	The function to call when the path has been calculated

callback will be called when the path has completed. Callback will not be called if the path is canceled (e.g when a new path is requested before the previous one has completed)

Path StartPath	(	Vector3	start,
		Vector3	end,
		OnPathDelegate	callback,
		int	graphMask
	)

Call this function to start calculating a path.

Parameters

start	The start point of the path
end	The end point of the path
callback	The function to call when the path has been calculated
graphMask	Mask used to specify which graphs should be searched for close nodes. See Pathfinding.NNConstraint.graphMask.

callback will be called when the path has completed. Callback will not be called if the path is canceled (e.g when a new path is requested before the previous one has completed)

Path StartPath	(	Path	p,
		OnPathDelegate	callback = `null`,
		int	graphMask = `-1`
	)

Call this function to start calculating a path.

Parameters

p	The path to start calculating
callback	The function to call when the path has been calculated
graphMask	Mask used to specify which graphs should be searched for close nodes. See Pathfinding.NNConstraint.graphMask. *A Pro Feature:** This parameter does not exist or has limited functionality in the Free version of the A* Pathfinding Project

callback will be called when the path has completed. Callback will not be called if the path is canceled (e.g when a new path is requested before the previous one has completed)

Member Data Documentation

bool detailedGizmos = false

bool drawGizmos = true

GraphNode endHint

private

List<GraphNode> lastCompletedNodePath

List<Vector3> lastCompletedVectorPath

uint lastPathID = 0

protected

The path ID of the last path queried.

List<IPathModifier> modifiers = new List<IPathModifier> ()

private

OnPathDelegate onPartialPathDelegate

private

OnPathDelegate onPathDelegate

private

Path path

protected

The current path.

OnPathDelegate pathCallback

Callback for when a path is completed.

Movement scripts should register to this delegate.
A temporary callback can also be set when calling StartPath, but that delegate will only be called for that path

Examples:: EndingCondition.cs, and MultiTargetPathExample.cs.

OnPathDelegate postProcessOriginalPath

For anything which requires the original nodes (Node[]) (before modifiers) to work.

OnPathDelegate postProcessPath

Anything which only modifies the positions (Vector3[])

OnPathDelegate preProcessPath

Called before pathfinding is started.

Path prevPath

private

Previous path.

Used to draw gizmos

bool saveGetNearestHints = true

Saves nearest nodes for previous path to enable faster Get Nearest Node calls.

This variable basically does not a affect anything at the moment. So it is hidden in the inspector

StartEndModifier startEndModifier = new StartEndModifier ()

GraphNode startHint

private

int [] tagPenalties = new int[32]

Penalties for each tag.

Tag 0 which is the default tag, will have added a penalty of tagPenalties[0]. These should only be positive values since the A* algorithm cannot handle negative penalties.

Note: This array should always have a length of 32.

See Also: Pathfinding.Path.tagPenalties

OnPathDelegate tmpPathCallback

private

Temporary callback only called for the current path.

This value is set by the StartPath functions

TagMask traversableTags = new TagMask (-1,-1)

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

/Users/arong/Unity/a-pathfinding-project/Assets/AstarPathfindingProject/Core/AI/Seeker.cs

Detailed Description

Public Types

Public Member Functions

Public Attributes

Protected Attributes

Private Attributes

Member Enumeration Documentation

Member Function Documentation

Member Data Documentation