FloodPathTracer Class Reference

Traces a path created with the Pathfinding::FloodPath. More...

Inheritance diagram for FloodPathTracer:

Collaboration diagram for FloodPathTracer:

Public Member Functions
	FloodPathTracer (Vector3 start, FloodPath flood, OnPathDelegate callbackDelegate)
override void	CalculateStep (long targetTick)
	Calculates the path until completed or until the time has passed targetTick.
override void	Initialize ()
	Initializes the path.
override void	Reset ()
	Reset all values to their default values.
void	Trace (Node from)
	Traces the calculated path from the start node to the end.
Public Member Functions inherited from ABPath
	ABPath (Vector3 start, Vector3 end, OnPathDelegate callbackDelegate)
	Create a new path with a start and end point.
override string	DebugString (PathLog logMode)
	Returns a debug string for this path.
Vector3	GetMovementVector (Vector3 point)
	Returns in which direction to move from a point on the path.
override void	Prepare ()
	Prepares the path.
void	ResetCosts (Path p)
	Resets End Node Costs.
	ABPath ()
	Default constructor.
Public Member Functions inherited from Path
void	AdvanceState (PathState s)
	Threadsafe increment of the state.
bool	CanTraverse (Node node)
	Returns if the node can be traversed.
void	Claim (System.Object o)
	Claim this path.
void	Error ()
	Aborts the path because of an error.
void	ForceLogError (string msg)
	Logs an error and calls Error() to true.
PathState	GetState ()
	Returns the state of the path in the pathfinding pipeline.
uint	GetTagPenalty (int tag)
	Returns penalty for the given tag.
float	GetTotalLength ()
	Total Length of the path.
bool	IsDone ()
	Returns if this path is done calculating.
void	Log (string msg)
	Appends a message to the errorLog.
void	LogError (string msg)
	Appends msg to errorLog and logs msg to the console.
virtual void	OnEnterPool ()
	Called when the path enters the pool.
void	PrepareBase (NodeRunData runData)
	Prepares low level path variables for calculation.
void	Release (System.Object o)
	Releases a path claim.
void	ReleaseSilent (System.Object o)
	Releases the path silently.
virtual void	ReturnPath ()
	Calls callback to return the calculated path.
virtual void	Trace (NodeRun from)
	Traces the calculated path from the end node to the start.

Static Public Member Functions
static FloodPathTracer	Construct (Vector3 start, FloodPath flood, OnPathDelegate callback=null)
Static Public Member Functions inherited from ABPath
static ABPath	Construct (Vector3 start, Vector3 end, OnPathDelegate callback=null)
	Construct a path with a start and end point.

Protected Member Functions
void	Setup (Vector3 start, FloodPath flood, OnPathDelegate callback)
Protected Member Functions inherited from ABPath
override void	Recycle ()
	Recycle the path.
void	UpdateStartEnd (Vector3 start, Vector3 end)
	Sets the start and end points.
void	Setup (Vector3 start, Vector3 end, OnPathDelegate callbackDelegate)
Protected Member Functions inherited from Path
bool	HasExceededTime (int searchedNodes, long targetTime)

Protected Attributes
FloodPath	flood
	Reference to the FloodPath which searched the path originally.
Protected Attributes inherited from ABPath
int[]	endNodeCosts
	Saved original costs for the end node.
bool	hasEndPoint = true
	Determines if a search for an end node should be done.
NodeRun	partialBestTarget = null
	Current best target for the partial path.
Protected Attributes inherited from Path
int[]	_tagPenalties = new int[0]
	Penalties for each tag.
NodeRun	currentR
	The node currently being processed.
bool	hasBeenReset = false
	True if the Reset function has been called.
float	maxFrameTime
	The max number of milliseconds per iteration (frame, in case of non-multithreading)

Additional Inherited Members
Public Attributes inherited from ABPath
bool	calculatePartial = false
	Calculate partial path if the target node cannot be reached.
Node	endHint
	Hints can be set to enable faster Get Nearest Node queries.
Node	endNode
	End node of the path.
Vector3	endPoint
	Exact end point of the path.
Int3	hTarget
	Target to use for H score calculations.
Vector3	originalEndPoint
	End Point exactly as in the path request.
Vector3	originalStartPoint
	Start Point exactly as in the path request.
bool	recalcStartEndCosts = true
	Defines if start and end nodes will have their connection costs recalculated for this path.
Node	startHint
	Hints can be set to enable faster Get Nearest Node queries.
Int3	startIntPoint
	Start point in integer coordinates.
Node	startNode
	Start node of the path.
Vector3	startPoint
	Exact start point of the path.
Properties inherited from Path
PathCompleteState	CompleteState [get, set]
bool	error [get]
	If the path failed, this is true.
string	errorLog [get]
	Log messages with info about eventual errors.
int[]	tagPenalties [get, set]
	Penalties for each tag.

Detailed Description

Traces a path created with the Pathfinding::FloodPath.

See Pathfinding::FloodPath for examples on how to use this path type

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

Member Function Documentation

override void CalculateStep ( long  targetTick )

virtual

Calculates the path until completed or until the time has passed targetTick.

Usually a check is only done every 500 nodes if the time has passed targetTick. Time/Ticks are got from System.DateTime.UtcNow.Ticks.

Basic outline of what the function does for the standard path (Pathfinding.ABPath).

while the end has not been found and no error has ocurred
    check if we have reached the end
        if so, exit and return the path
    
    open the current node, i.e loop through its neighbours, mark them as visited and put them on a heap
    
    check if there are still nodes left to process (or have we searched the whole graph)
        if there are none, flag error and exit
        
    pop the next node of the heap and set it as current
    
    check if the function has exceeded the time limit
        if so, return and wait for the function to get called again

Reimplemented from ABPath.

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override void Initialize ( )

virtual

Initializes the path.

Traces the path from the start node.

Reimplemented from ABPath.

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override void Reset ( )

virtual

Reset all values to their default values.

All inheriting path types must implement this function, resetting ALL their variables to enable recycling of paths. Call this base function in inheriting types with base.Reset ();

Reimplemented from ABPath.

void Trace

(

Node

from

)

Traces the calculated path from the start node to the end.

This will build an array (path) of the nodes this path will pass through and also set the vectorPath array to the path arrays positions. This implementation will use the flood (FloodPath) to trace the path from precalculated data.

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

• /Users/aron/Unity/AstarPathfindingGIT/Assets/AstarPathfindingProject/Pathfinders/FloodPathTracer.cs