Class LayerGridGraph Extends GridGraph, IUpdatableGraph

Public

Grid Graph, supports layered worlds.

The GridGraph is great in many ways, reliable, easily configured and updatable during runtime. But it lacks support for worlds which have multiple layers, such as a building with multiple floors. That's where this graph type comes in. It supports basically the same stuff as the grid graph, but also multiple layers. It uses a bit more memory than a regular grid graph, but is otherwise equivalent.

See

GridGraph

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

Inner Types

Struct returned by SampleHeights.

Sorts RaycastHits by distance.

Public Methods

CalculateConnections (node)

Calculates the grid connections for a single node.

Public
CalculateConnections (x, z)

Calculates connections for all nodes in a cell (there may be multiple layers of nodes)

Public
CalculateConnections (x, z, layerIndex)

Calculates the layered grid graph connections for a single node.

Public
CountNodes ()

Number of nodes in the graph.

Public
GetNearest (position, constraint, hint)

Returns the nearest node to a position using the specified NNConstraint.

Public
GetNode (x, z)

Node in the specified cell in the first layer.

Public
GetNode (x, z, layer)

Node in the specified cell.

Public
GetNodes (action)

Calls a delegate with all nodes in the graph.

Public
GetNodesInRegion (rect)

Get all nodes in a rectangle.

Public
GetNodesInRegion (rect, buffer)

Get all nodes in a rectangle.

Public
RecalculateCell (x, z, resetPenalties=true, resetTags=true)

Recalculates single cell.

Public

Public Variables

LayerCount
Public
characterHeight

Nodes with a short distance to the node above it will be set unwalkable.

Public
mergeSpanRange

If two layered nodes are too close, they will be merged.

Public
uniformWidthDepthGrid
Public

Inherited Public Members

CalculateConnectionsForCellAndNeighbours (x, z)

Calculates the grid connections for a cell as well as its neighbours.

Public
CalculateTransform ()

Returns a new transform which transforms graph space to world space.

Public
CheckConnection (node, dir)

Returns if node is connected to it's neighbour in the specified direction.

Public
ConvertHexagonSizeToNodeSize (mode, value)
Public Static
ConvertNodeSizeToHexagonSize (mode, value)
Public Static
Depth
Public
ErodeWalkableArea ()

Erodes the walkable area.

Public
ErodeWalkableArea (xmin, zmin, xmax, zmax)

Erodes the walkable area.

Public
GetConnectionCost (dir)
Public
GetNearest (position)

Returns the nearest node to a position.

Public
GetNearest (position, constraint)

Returns the nearest node to a position using the specified NNConstraint.

Public
GetNearestForce (position, constraint)

Returns the nearest node to a position using the specified constraint .

Public
GetNodes (action)

Calls a delegate with all nodes in the graph until the delegate returns false.

Public
GetNodesInRegion (bounds)

All nodes inside the bounding box.

Public
GetNodesInRegion (shape)

All nodes inside the shape.

Public
GetRectFromBounds (bounds)

A rect that contains all nodes that the bounds could touch.

Public
GraphPointToWorld (x, z, height)

Transform a point in graph space to world space.

Public
HasNodeConnection (index, x, z, dir)
Public
IsValidConnection (node1, node2)

Returns true if a connection between the adjacent nodes n1 and n2 is valid.

Public
LayerCount

Number of layers in the graph.

Public
Linecast (from, to)

Returns if there is an obstacle between from and to on the graph.

Public
Linecast (from, to, hit, trace=null, filter=null)

Returns if there is an obstacle between from and to on the graph.

Public
Linecast (fromNode, toNode, filter=null)

Returns if there is an obstacle between the two nodes on the graph.

Public
Linecast (from, to, hit, trace=null, filter=null)

Returns if there is an obstacle between from and to on the graph.

Public
Linecast (fromNode, normalizedFromPoint, toNode, normalizedToPoint, hit, trace=null, filter=null, continuePastEnd=…)

Returns if there is an obstacle between the two nodes on the graph.

Public
Linecast (fromNode, fixedNormalizedFromPoint, toNode, fixedNormalizedToPoint, hit, trace=null, filter=null, continuePastEnd=…)

Returns if there is an obstacle between the two nodes on the graph.

Public
OnDrawGizmos (gizmos, drawNodes)

Draw gizmos for the graph.

Public
RelocateNodes (deltaMatrix)

Moves the nodes in this graph.

Public
RelocateNodes (center, rotation, nodeSize, aspectRatio=1, isometricAngle=0)

Relocate the grid graph using new settings.

Public
Scan ()

Scan the graph.

Public
SetDimensions (width, depth, nodeSize)

Updates unclampedSize from width, depth and nodeSize values.

Public
SetGridShape (shape)

Changes the grid shape.

Public
SetUpOffsetsAndCosts ()

Sets up neighbourOffsets with the current settings.

Public
StandardDimetricAngle

Commonly used value for isometricAngle.

Public Static Readonly
StandardIsometricAngle

Commonly used value for isometricAngle.

Public Static Readonly
UpdateTransform ()

Updates the transform field which transforms graph space to world space.

Public
Width
Public
active

Reference to the AstarPath object in the scene.

Public
aspectRatio

Scaling of the graph along the X axis.

Public
center

Center point of the grid.

Public
collision

Settings on how to check for walkability and height.

Public
cutCorners

If disabled, will not cut corners on obstacles.

Public
depth

Depth (height) of the grid in nodes.

Public
drawGizmos

Enable to draw gizmos in the Unity scene view.

Public
erodeIterations

Erosion of the graph.

Public
erosionFirstTag

Tag to start from when using tags for erosion.

Public
erosionUseTags

Use tags instead of walkability for erosion.

Public
getNearestForceOverlap

In GetNearestForce, determines how far to search after a valid node has been found.

Public Static
graphIndex

Index of the graph, used for identification purposes.

Public
guid

Used as an ID of the graph, considered to be unique.

Public
infoScreenOpen

Used in the editor to check if the info screen is open.

Public
initialPenalty

Default penalty to apply to all nodes.

Public
inspectorGridMode

Determines the layout of the grid graph inspector in the Unity Editor.

Public
inspectorHexagonSizeMode

Determines how the size of each hexagon is set in the inspector.

Public
is2D

Get or set if the graph should be in 2D mode.

Public
isometricAngle

Angle to use for the isometric projection.

Public
maxClimb

The max position difference between two nodes to enable a connection.

Public
maxSlope

The max slope in degrees for a node to be walkable.

Public
name

Name of the graph.

Public
neighbourCosts

Costs to neighbour nodes.

Public Readonly
neighbourOffsets

Index offset to get neighbour nodes.

Public Readonly
neighbourXOffsets

Offsets in the X direction for neighbour nodes.

Public Readonly
neighbourZOffsets

Offsets in the Z direction for neighbour nodes.

Public Readonly
neighbours

Number of neighbours for each node.

Public
nodeSize

Size of one node in world units.

Public
nodes

All nodes in this graph.

Public
open

Is the graph open in the editor.

Public
penaltyAngle
Public
penaltyAngleFactor

How much penalty is applied depending on the slope of the terrain.

Public
penaltyAnglePower

How much extra to penalize very steep angles.

Public
penaltyPosition

Use position (y-coordinate) to calculate penalty.

Public
penaltyPositionFactor

Scale factor for penalty when calculating from position.

Public
penaltyPositionOffset

Offset for the position when calculating penalty.

Public
rotation

Rotation of the grid in degrees.

Public
showMeshOutline

Show an outline of the grid nodes in the Unity Editor.

Public
showMeshSurface

Show the surface of the graph.

Public
showNodeConnections

Show the connections between the grid nodes in the Unity Editor.

Public
size

Size of the grid.

Public
textureData

Holds settings for using a texture as source for a grid graph.

Public
transform

Determines how the graph transforms graph space to world space.

Public
unclampedSize

Size of the grid.

Public
uniformEdgeCosts

If true, all edge costs will be set to the same value.

Public
uniformWidthDepthGrid

This is placed here so generators inheriting from this one can override it and set it to false.

Public
useJumpPointSearch

Use jump point search to speed up pathfinding.

Public
width

Width of the grid in nodes.

Public

Private/Protected Members

AddLayers (count)

Increases the capacity of the nodes array to hold more layers.

Private
AssertSafeToUpdateGraph ()

Throws an exception if it is not safe to update internal graph data right now.

Protected
CalculateAffectedRegions (o, originalRect, affectRect, physicsRect, willChangeWalkability, erosion)
Protected
ClipLineSegmentToBounds (a, b, outA, outB)

Clips a line segment in graph space to the graph bounds.

Protected
CrossMagnitude (a, b)

Magnitude of the cross product a x b.

Protected Static
DeserializeExtraInfo (ctx)

Deserializes graph type specific node data.

Protected
DestroyAllNodes ()

Destroys all nodes in the graph.

Protected
DrawUnwalkableNodes (size)
Protected
ErosionAnyFalseConnections (baseNode)

True if the node has any blocked connections.

Protected
GetNearestFromGraphSpace (positionGraphSpace)
Protected
GetNearestNode (position, x, z, constraint)
Private
GetNodesInRegion (bounds, shape)

All nodes inside the shape or if null, the bounding box.

Protected
OnDestroy ()

This function will be called when this graph is destroyed.

Protected
PostDeserialization (ctx)

Called after all deserialization has been done for all graphs.

Protected
RemoveGridGraphFromStatic ()
Private
SampleHeights (collision, mergeSpanRange, position, numHits)

Fires a ray from the sky and returns a sample for everything it hits.

Protected Static
ScanInternal ()

Internal method to scan the graph.

Protected
SerializeExtraInfo (ctx)

Serializes graph type specific node data.

Protected
UpdateArea (o)

Updates an area using the specified #GraphUpdateObject.

Private
comparer

Sorts RaycastHits by distance.

Private Static Readonly
exists

True if the graph exists, false if it has been destroyed.

Internal
heightSampleBuffer

Internal buffer used by SampleHeights.

Private Static
hexagonNeighbourIndices

Which neighbours are going to be used when neighbours=6.

Internal Static Readonly
lastScannedDepth
Internal
lastScannedWidth
Internal
layerCount

Number of layers.

Internal
useRaycastNormal

Use heigh raycasting normal for max slope calculation.

Protected

Deprecated Members

CalculateConnections (x, z, layerIndex, node)

Calculates the layered grid graph connections for a single node.

Public
CheckConnection (node, dir)

Returns if node is connected to it's neighbour in the specified direction.

Public Static