GridNodeBase Class Reference

Base class for GridNode and LevelGridNode. More...

Detailed Description

Base class for GridNode and LevelGridNode.

Public Member Functions
override void	AddConnection (GraphNode node, uint cost)
	Add a connection from this node to the specified node.
override void	ClearConnections (bool alsoReverse)
	Remove all connections from this node.
override bool	ContainsConnection (GraphNode node)
	Checks if this node has a connection to the specified node.
override void	DeserializeReferences (GraphSerializationContext ctx)
	Used to deserialize references to other nodes e.g connections.
override void	FloodFill (System.Collections.Generic.Stack< GraphNode > stack, uint region)
override void	GetConnections (GraphNodeDelegate del)
	Calls the delegate with all connections from this node.
override void	Open (Path path, PathNode pathNode, PathHandler handler)
	Open the node.
override void	RemoveConnection (GraphNode node)
	Removes any connection from this node to the specified node.
override void	SerializeReferences (GraphSerializationContext ctx)
	Used to serialize references to other nodes e.g connections.
override void	UpdateRecursiveG (Path path, PathNode pathNode, PathHandler handler)
Public Member Functions inherited from GraphNode
virtual void	DeserializeNode (GraphSerializationContext ctx)
void	Destroy ()
	Destroys the node.
virtual void	FloodFill (Stack< GraphNode > stack, uint region)
virtual bool	GetPortal (GraphNode other, List< Vector3 > left, List< Vector3 > right, bool backwards)
	Add a portal from this node to the specified node.
virtual void	RecalculateConnectionCosts ()
	Recalculates all connection costs from this node.
virtual void	SerializeNode (GraphSerializationContext ctx)

Public Attributes
uint[]	connectionCosts
GraphNode[]	connections
Public Attributes inherited from GraphNode
const uint	MaxAreaIndex = FlagsAreaMask >> FlagsAreaOffset
const uint	MaxGraphIndex = FlagsGraphMask >> FlagsGraphOffset
	Max number of graphs-1.
Int3	position
	Position of the node in world space.

Protected Member Functions
	GridNodeBase (AstarPath astar)
Protected Member Functions inherited from GraphNode
	GraphNode (AstarPath astar)
	Constructor for a graph node.

Protected Attributes
ushort	gridFlags
int	nodeInGridIndex
Protected Attributes inherited from GraphNode
uint	flags
	Bitpacked field holding several pieces of data.

Properties
int	NodeInGridIndex [get, set]
	The index of the node in the grid.
bool	TmpWalkable [get, set]
	Temporary variable used internally when updating the graph.
bool	WalkableErosion [get, set]
	Stores walkability before erosion is applied.
Properties inherited from GraphNode
uint	Area [get, set]
bool	Destroyed [get]
uint	Flags [get, set]
	Holds various bitpacked variables.
uint	GraphIndex [get, set]
int	NodeIndex [get]
	Internal unique index.
uint	Penalty [get, set]
	Penalty cost for walking on this node.
uint	Tag [get, set]
bool	Walkable [get, set]
	True if the node is traversable.

Private Attributes
const int	GridFlagsWalkableErosionMask = 1 << GridFlagsWalkableErosionOffset
const int	GridFlagsWalkableErosionOffset = 8
const int	GridFlagsWalkableTmpMask = 1 << GridFlagsWalkableTmpOffset
const int	GridFlagsWalkableTmpOffset = 9

Static Private Attributes
static readonly System.Version	VERSION_3_8_3 = new System.Version(3, 8, 3)
	Cached to avoid allocations.

Constructor & Destructor Documentation

GridNodeBase ( AstarPath  astar )

protected

Member Function Documentation

override void AddConnection ( GraphNode  node, uint  cost  )

virtual

Add a connection from this node to the specified node.

If the connection already exists, the cost will simply be updated and no extra connection added.

Note

Only adds a one-way connection. Consider calling the same function on the other node to get a two-way connection.

Implements GraphNode.

override void ClearConnections ( bool  alsoReverse )

virtual

Remove all connections from this node.

Parameters

alsoReverse

if true, neighbours will be requested to remove connections to this node.

Implements GraphNode.

override bool ContainsConnection ( GraphNode  node )

virtual

Checks if this node has a connection to the specified node.

Reimplemented from GraphNode.

override void DeserializeReferences ( GraphSerializationContext  ctx )

virtual

Used to deserialize references to other nodes e.g connections.

Use the GraphSerializationContext.GetNodeIdentifier and GraphSerializationContext.GetNodeFromIdentifier methods for serialization and deserialization respectively.

Nodes must override this method and serialize their connections. Graph generators do not need to call this method, it will be called automatically on all nodes at the correct time by the serializer.

Reimplemented from GraphNode.

override void FloodFill	(	System.Collections.Generic.Stack< GraphNode >	stack,
		uint	region
	)

override void GetConnections ( GraphNodeDelegate  del )

virtual

Calls the delegate with all connections from this node.

Implements GraphNode.

override void Open ( Path  path, PathNode  pathNode, PathHandler  handler  )

virtual

Open the node.

Implements GraphNode.

override void RemoveConnection ( GraphNode  node )

virtual

Removes any connection from this node to the specified node.

If no such connection exists, nothing will be done.

Note

This only removes the connection from this node to the other node. You may want to call the same function on the other node to remove its eventual connection to this node.

Implements GraphNode.

override void SerializeReferences ( GraphSerializationContext  ctx )

virtual

Used to serialize references to other nodes e.g connections.

Use the GraphSerializationContext.GetNodeIdentifier and GraphSerializationContext.GetNodeFromIdentifier methods for serialization and deserialization respectively.

Nodes must override this method and serialize their connections. Graph generators do not need to call this method, it will be called automatically on all nodes at the correct time by the serializer.

Reimplemented from GraphNode.

override void UpdateRecursiveG ( Path  path, PathNode  pathNode, PathHandler  handler  )

virtual

Reimplemented from GraphNode.

Member Data Documentation

uint [] connectionCosts

GraphNode [] connections

ushort gridFlags

protected

const int GridFlagsWalkableErosionMask = 1 << GridFlagsWalkableErosionOffset

private

const int GridFlagsWalkableErosionOffset = 8

private

const int GridFlagsWalkableTmpMask = 1 << GridFlagsWalkableTmpOffset

private

const int GridFlagsWalkableTmpOffset = 9

private

int nodeInGridIndex

protected

readonly System.Version VERSION_3_8_3 = new System.Version(3, 8, 3)

staticprivate

Cached to avoid allocations.

Property Documentation

int NodeInGridIndex

getset

The index of the node in the grid.

This is x + z*graph.width So you can get the X and Z indices using

int index = node.NodeInGridIndex;
int x = index % graph.width;
int z = index / graph.width;
// where graph is GridNode.GetGridGraph (node.graphIndex), i.e the graph the nodes are contained in.

bool TmpWalkable

getset

Temporary variable used internally when updating the graph.

bool WalkableErosion

getset

Stores walkability before erosion is applied.

Used internally when updating the graph.

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

• /Users/arong/Unity/a-pathfinding-project/Assets/AstarPathfindingProject/Generators/NodeClasses/GridNodeBase.cs