Classes
struct	GUOSingle
	Holds a single update that needs to be performed on a graph. More...

Public Member Functions
	GraphUpdateProcessor (AstarPath astar)

void	AddToQueue (GraphUpdateObject ob)
	Update all graphs using the GraphUpdateObject.

void	DisableMultithreading ()

void	EnableMultithreading ()

void	FloodFill (GraphNode seed)
	Floodfills starting from the specified node.

void	FloodFill (GraphNode seed, uint area)
	Floodfills starting from 'seed' using the specified area.

void	FloodFill ()
	Floodfills all graphs and updates areas for every node.

AstarWorkItem	GetWorkItem ()
	Work item which can be used to apply all queued updates.

Properties
bool	IsAnyGraphUpdateInProgress `[get]`
	Returns if any graph updates are in progress.

bool	IsAnyGraphUpdateQueued `[get]`
	Returns if any graph updates are waiting to be applied.

Events
System.Action	OnGraphsUpdated

Private Types
enum	GraphUpdateOrder { GraphUpdate, FloodFill }
	Order type for updating graphs. More...

Private Member Functions
bool	ProcessGraphUpdates (bool force)
	Updates graphs.

void	ProcessGraphUpdatesAsync ()
	Graph update thread.

void	ProcessPostUpdates ()

bool	ProcessRegularUpdates (bool force)

void	QueueGraphUpdatesInternal ()
	Schedules graph updates internally.

bool	StartAsyncUpdatesIfQueued ()
	Signal the graph update thread to start processing graph updates if there are any in the graphUpdateQueueAsync queue.

Private Attributes
bool	anyGraphUpdateInProgress
	Used for IsAnyGraphUpdateInProgress.

readonly AstarPath	astar
	Holds graphs that can be updated.

readonly System.Threading.ManualResetEvent	asyncGraphUpdatesComplete = new System.Threading.ManualResetEvent(true)

readonly System.Threading.AutoResetEvent	exitAsyncThread = new System.Threading.AutoResetEvent(false)

readonly System.Threading.AutoResetEvent	graphUpdateAsyncEvent = new System.Threading.AutoResetEvent(false)

readonly Queue< GraphUpdateObject >	graphUpdateQueue = new Queue<GraphUpdateObject>()
	Queue containing all waiting graph update queries.

readonly Queue< GUOSingle >	graphUpdateQueueAsync = new Queue<GUOSingle>()
	Queue of all async graph updates waiting to be executed.

readonly Queue< GUOSingle >	graphUpdateQueuePost = new Queue<GUOSingle>()
	Queue of all non-async graph update post events waiting to be executed.

readonly Queue< GUOSingle >	graphUpdateQueueRegular = new Queue<GUOSingle>()
	Queue of all non-async graph updates waiting to be executed.

Thread	graphUpdateThread
	Reference to the thread which handles async graph updates.

uint	lastUniqueAreaIndex = 0
	The last area index which was used.

Member Enumeration Documentation

enum GraphUpdateOrder

private

Order type for updating graphs.

Enumerator:

GraphUpdate
FloodFill

Constructor & Destructor Documentation

GraphUpdateProcessor ( AstarPath astar )

Member Function Documentation

void AddToQueue ( GraphUpdateObject ob )

Update all graphs using the GraphUpdateObject.

This can be used to, e.g make all nodes in an area unwalkable, or set them to a higher penalty. The graphs will be updated as soon as possible (with respect to AstarPath.batchGraphUpdates)

See Also: FlushGraphUpdates

void DisableMultithreading ( )

void EnableMultithreading ( )

void FloodFill ( GraphNode seed )

Floodfills starting from the specified node.

See Also: https://en.wikipedia.org/wiki/Flood_fill

void FloodFill	(	GraphNode	seed,
		uint	area
	)

Floodfills starting from 'seed' using the specified area.

See Also: https://en.wikipedia.org/wiki/Flood_fill

void FloodFill ( )

Floodfills all graphs and updates areas for every node.

The different colored areas that you see in the scene view when looking at graphs are called just 'areas', this method calculates which nodes are in what areas.

See Also: Pathfinding.Node.area

AstarWorkItem GetWorkItem ( )

Work item which can be used to apply all queued updates.

bool ProcessGraphUpdates ( bool force )

private

Updates graphs.

Will do some graph updates, possibly signal another thread to do them. Will only process graph updates added by QueueGraphUpdatesInternal

Parameters

force If true, all graph updates will be processed before this function returns. The return value will be True.

Returns: True if all graph updates have been done and pathfinding (or other tasks) may resume. False if there are still graph updates being processed or waiting in the queue.

void ProcessGraphUpdatesAsync ( )

private

Graph update thread.

Async graph updates will be executed by this method in another thread.

void ProcessPostUpdates ( )

private

bool ProcessRegularUpdates ( bool force )

private

void QueueGraphUpdatesInternal ( )

private

Schedules graph updates internally.

bool StartAsyncUpdatesIfQueued ( )

private

Signal the graph update thread to start processing graph updates if there are any in the graphUpdateQueueAsync queue.

Returns: True if the other thread was signaled.

Member Data Documentation

bool anyGraphUpdateInProgress

private

Used for IsAnyGraphUpdateInProgress.

readonly AstarPath astar

private

Holds graphs that can be updated.

readonly System.Threading.ManualResetEvent asyncGraphUpdatesComplete = new System.Threading.ManualResetEvent(true)

private

readonly System.Threading.AutoResetEvent exitAsyncThread = new System.Threading.AutoResetEvent(false)

private

readonly System.Threading.AutoResetEvent graphUpdateAsyncEvent = new System.Threading.AutoResetEvent(false)

private

readonly Queue<GraphUpdateObject> graphUpdateQueue = new Queue<GraphUpdateObject>()

private

Queue containing all waiting graph update queries.

Add to this queue by using AddToQueue.

See Also: AddToQueue

readonly Queue<GUOSingle> graphUpdateQueueAsync = new Queue<GUOSingle>()

private

Queue of all async graph updates waiting to be executed.

readonly Queue<GUOSingle> graphUpdateQueuePost = new Queue<GUOSingle>()

private

Queue of all non-async graph update post events waiting to be executed.

readonly Queue<GUOSingle> graphUpdateQueueRegular = new Queue<GUOSingle>()

private

Queue of all non-async graph updates waiting to be executed.

Thread graphUpdateThread

private

Reference to the thread which handles async graph updates.

See Also: ProcessGraphUpdatesAsync

uint lastUniqueAreaIndex = 0

private

The last area index which was used.

Used for the FloodFill function to start flood filling with an unused area.

See Also: FloodFill(Node node)

Property Documentation

bool IsAnyGraphUpdateInProgress

get

Returns if any graph updates are in progress.

bool IsAnyGraphUpdateQueued

get

Returns if any graph updates are waiting to be applied.

Event Documentation

System.Action OnGraphsUpdated

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

/Users/arong/Unity/a-pathfinding-project/Assets/AstarPathfindingProject/Core/Misc/GraphUpdateProcessor.cs

Classes

Public Member Functions

Properties

Events

Private Types

Private Member Functions

Private Attributes

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

Property Documentation

Event Documentation