A* Pathfinding Project  3.6.1
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LevelGridNode Class Reference

Describes a single node for the LayeredGridGraph. More...

Detailed Description

Describes a single node for the LayeredGridGraph.

Works almost the same as a grid node, except that it also stores to which layer the connections go to

Public Member Functions

 LevelGridNode (AstarPath astar)
 
override void AddConnection (GraphNode node, uint cost)
 
override void ClearConnections (bool alsoReverse)
 Remove all connections from this node.
 
override void DeserializeNode (GraphSerializationContext ctx)
 
override void FloodFill (Stack< GraphNode > stack, uint region)
 
bool GetConnection (int i)
 Is there a grid connection in that direction.
 
override void GetConnections (GraphNodeDelegate del)
 Calls the delegate with all connections from this node.
 
int GetConnectionValue (int dir)
 Which layer a grid connection goes to.
 
override bool GetPortal (GraphNode other, List< Vector3 > left, List< Vector3 > right, bool backwards)
 Add a portal from this node to the specified node.
 
bool HasAnyGridConnections ()
 Does this node have any grid connections.
 
override void Open (Path path, PathNode pathNode, PathHandler handler)
 Open the node.
 
override void RemoveConnection (GraphNode node)
 
void ResetAllGridConnections ()
 Removes all grid connections from this node.
 
override void SerializeNode (GraphSerializationContext ctx)
 
void SetConnectionValue (int dir, int value)
 Set which layer a grid connection goes to.
 
void SetPosition (Int3 position)
 
override void UpdateRecursiveG (Path path, PathNode pathNode, PathHandler handler)
 
- Public Member Functions inherited from GraphNode
 GraphNode (AstarPath astar)
 Constructor for a graph node.
 
virtual bool ContainsConnection (GraphNode node)
 Checks if this node has a connection to the specified node.
 
virtual void DeserializeReferences (GraphSerializationContext ctx)
 Used to deserialize references to other nodes e.g connections.
 
void Destroy ()
 Destroys the node.
 
virtual void RecalculateConnectionCosts ()
 Recalculates all connection costs from this node.
 
virtual void SerializeReferences (GraphSerializationContext ctx)
 Used to serialize references to other nodes e.g connections.
 
void UpdateG (Path path, PathNode pathNode)
 

Static Public Member Functions

static LayerGridGraph GetGridGraph (uint graphIndex)
 
static void SetGridGraph (int graphIndex, LayerGridGraph graph)
 

Public Attributes

float height
 
const int MaxLayerCount = ConnectionMask
 
const int NoConnection = 0xF
 
- Public Attributes inherited from GraphNode
const uint MaxAreaIndex = FlagsAreaMask >> FlagsAreaOffset
 
const uint MaxGraphIndex = FlagsGraphMask >> FlagsGraphOffset
 Max number of graphs-1.
 
Int3 position
 

Protected Attributes

ushort gridConnections
 
uint gridConnections
 
ushort gridFlags
 
int nodeInGridIndex
 
- Protected Attributes inherited from GraphNode
uint flags
 

Static Protected Attributes

static LayerGridGraph[] gridGraphs
 

Properties

int NodeInGridIndex [get, set]
 
bool TmpWalkable [get, set]
 
bool WalkableErosion [get, set]
 
- Properties inherited from GraphNode
uint Area [get, set]
 
bool Destroyed [get]
 
uint Flags [get, set]
 Holds various bitpacked variables.
 
uint graphIndex [get, set]
 
uint GraphIndex [get, set]
 
int NodeIndex [get]
 
uint Penalty [get, set]
 Penalty cost for walking on this node.
 
Int3 Position [get]
 
uint Tag [get, set]
 
uint tags [get, set]
 
bool walkable [get, set]
 
bool Walkable [get, set]
 True if the node is traversable.
 

Private Attributes

const int ConnectionMask = 0xF
 
const int ConnectionStride = 4
 
const int GridFlagsWalkableErosionMask = 1 << GridFlagsWalkableErosionOffset
 
const int GridFlagsWalkableErosionOffset = 8
 
const int GridFlagsWalkableTmpMask = 1 << GridFlagsWalkableTmpOffset
 
const int GridFlagsWalkableTmpOffset = 9
 

Static Private Attributes

static LayerGridGraph[] _gridGraphs = new LayerGridGraph[0]
 

Constructor & Destructor Documentation

Member Function Documentation

override void AddConnection ( GraphNode  node,
uint  cost 
)
virtual

Implements GraphNode.

override void ClearConnections ( bool  alsoReverse)
virtual

Remove all connections from this node.

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

Implements GraphNode.

override void DeserializeNode ( GraphSerializationContext  ctx)
virtual

Reimplemented from GraphNode.

override void FloodFill ( Stack< GraphNode stack,
uint  region 
)
virtual

Reimplemented from GraphNode.

bool GetConnection ( int  i)

Is there a grid connection in that direction.

override void GetConnections ( GraphNodeDelegate  del)
virtual

Calls the delegate with all connections from this node.

Implements GraphNode.

int GetConnectionValue ( int  dir)

Which layer a grid connection goes to.

Parameters
dirDirection for the connection.
Returns
The layer of the connected node or NoConnection if there is no connection in that direction.
static LayerGridGraph GetGridGraph ( uint  graphIndex)
static
override bool GetPortal ( GraphNode  other,
List< Vector3 >  left,
List< Vector3 >  right,
bool  backwards 
)
virtual

Add a portal from this node to the specified node.

This function should add a portal to the left and right lists which is connecting the two nodes (this and other).

Parameters
otherThe node which is on the other side of the portal (strictly speaking it does not actually have to be on the other side of the portal though).
leftList of portal points on the left side of the funnel
rightList of portal points on the right side of the funnel
backwardsIf this is true, the call was made on a node with the other node as the node before this one in the path. In this case you may choose to do nothing since a similar call will be made to the other node with this node referenced as other (but then with backwards = true). You do not have to care about switching the left and right lists, that is done for you already.
Returns
True if the call was deemed successful. False if some unknown case was encountered and no portal could be added. If both calls to node1.GetPortal (node2,...) and node2.GetPortal (node1,...) return false, the funnel modifier will fall back to adding to the path the positions of the node.

The default implementation simply returns false.

This function may add more than one portal if necessary.

See Also
http://digestingduck.blogspot.se/2010/03/simple-stupid-funnel-algorithm.html

Reimplemented from GraphNode.

bool HasAnyGridConnections ( )

Does this node have any grid connections.

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

Open the node.

Implements GraphNode.

override void RemoveConnection ( GraphNode  node)
virtual

Implements GraphNode.

void ResetAllGridConnections ( )

Removes all grid connections from this node.

override void SerializeNode ( GraphSerializationContext  ctx)
virtual

Reimplemented from GraphNode.

void SetConnectionValue ( int  dir,
int  value 
)

Set which layer a grid connection goes to.

Parameters
dirDirection for the connection.
valueThe layer of the connected node or NoConnection if there should be no connection in that direction.
static void SetGridGraph ( int  graphIndex,
LayerGridGraph  graph 
)
static
void SetPosition ( Int3  position)
override void UpdateRecursiveG ( Path  path,
PathNode  pathNode,
PathHandler  handler 
)
virtual

Reimplemented from GraphNode.

Member Data Documentation

LayerGridGraph [] _gridGraphs = new LayerGridGraph[0]
staticprivate
const int ConnectionMask = 0xF
private
const int ConnectionStride = 4
private
ushort gridConnections
protected
uint gridConnections
protected
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
LayerGridGraph [] gridGraphs
staticprotected
float height
const int MaxLayerCount = ConnectionMask
const int NoConnection = 0xF
int nodeInGridIndex
protected

Property Documentation

int NodeInGridIndex
getset
bool TmpWalkable
getset
bool WalkableErosion
getset

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