Package de.bsommerfeld.pathetic.engine.pathfinder.processing

Class NodeEvaluationContextImpl

java.lang.Object

de.bsommerfeld.pathetic.engine.pathfinder.processing.NodeEvaluationContextImpl

All Implemented Interfaces:

NodeEvaluationContext

public class NodeEvaluationContextImpl
extends Object
implements NodeEvaluationContext

Constructor Summary

Constructors

Constructor	Description
NodeEvaluationContextImpl(SearchContext searchContext, Node engineNode, Node parentEngineNode, IHeuristicStrategy heuristicStrategy)	Creates a new NodeEvaluationContextImpl with the specified parameters.

Method Summary

Modifier and Type	Method	Description
double	getBaseTransitionCost()	Returns the base traversal cost for the transition from the previous PathPosition to the current PathPosition.
int	getCurrentNodeDepth()	Returns the depth of the current PathPosition in the search tree.
double	getCurrentNodeHeuristicValue()	Returns the heuristic value (H-cost) calculated by the pathfinding engine for the current PathPosition towards the target.
PathPosition	getCurrentPathPosition()	Returns the PathPosition currently being evaluated.
double	getPathCostToPreviousPosition()	Returns the accumulated G-cost (actual known cost from start) up to the previous PathPosition.
PathPosition	getPreviousPathPosition()	Returns the PathPosition from which the current PathPosition is being reached.
SearchContext	getSearchContext()	Provides access to the overarching SearchContext for this pathfinding operation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface de.bsommerfeld.pathetic.api.pathing.processing.context.NodeEvaluationContext

getEnvironmentContext, getNavigationPointProvider, getPathfinderConfiguration, getSharedData, getStartPathPosition, getTargetPathPosition

Constructor Details

NodeEvaluationContextImpl

public NodeEvaluationContextImpl(SearchContext searchContext,
 Node engineNode,
 Node parentEngineNode,
 IHeuristicStrategy heuristicStrategy)

Creates a new NodeEvaluationContextImpl with the specified parameters.

Parameters:

searchContext - The search context

engineNode - The current node being evaluated

parentEngineNode - The parent node (can be null for the start node)

Method Details

getCurrentPathPosition

public PathPosition getCurrentPathPosition()

Description copied from interface: NodeEvaluationContext

Returns the PathPosition currently being evaluated. This is the potential next step in the path.

Specified by:

getCurrentPathPosition in interface NodeEvaluationContext

Returns:

The current PathPosition.

getPreviousPathPosition

public PathPosition getPreviousPathPosition()

Description copied from interface: NodeEvaluationContext

Returns the PathPosition from which the current PathPosition is being reached. This is the position of the parent A* Node. This will be null if the currentPathPosition is the start position being evaluated initially.

Specified by:

getPreviousPathPosition in interface NodeEvaluationContext

Returns:

The previous PathPosition in the path segment, or null.

getCurrentNodeDepth

public int getCurrentNodeDepth()

Description copied from interface: NodeEvaluationContext

Returns the depth of the current PathPosition in the search tree. The start node is typically at depth 0 or 1 depending on convention. This value comes from the engine's internal node representation.

Specified by:

getCurrentNodeDepth in interface NodeEvaluationContext

Returns:

The depth of the current node.

getCurrentNodeHeuristicValue

public double getCurrentNodeHeuristicValue()

Description copied from interface: NodeEvaluationContext

Returns the heuristic value (H-cost) calculated by the pathfinding engine for the current PathPosition towards the target. This is the engine's estimate *before* any processor adjustments might influence path choices.

Specified by:

getCurrentNodeHeuristicValue in interface NodeEvaluationContext

Returns:

The engine-calculated heuristic value for the current node.

getPathCostToPreviousPosition

public double getPathCostToPreviousPosition()

Description copied from interface: NodeEvaluationContext

Returns the accumulated G-cost (actual known cost from start) up to the previous PathPosition. This value is derived from getParentEngineNode().getGCost(). If previousPathPosition is null (i.e., current is start), this returns 0.

Specified by:

getPathCostToPreviousPosition in interface NodeEvaluationContext

Returns:

The accumulated g-cost to the previous position.

getBaseTransitionCost

public double getBaseTransitionCost()

Description copied from interface: NodeEvaluationContext

Returns the base traversal cost for the transition from the previous PathPosition to the current PathPosition. This is typically derived from currentPathPosition.distance(previousPathPosition) and represents the raw geometric/movement cost *before* any NodeCostProcessor processors add their contributions for this specific transition. Returns 0 if previousPathPosition is null.

Specified by:

getBaseTransitionCost in interface NodeEvaluationContext

Returns:

The base cost of the current transition.

getSearchContext

public SearchContext getSearchContext()

Description copied from interface: NodeEvaluationContext

Provides access to the overarching SearchContext for this pathfinding operation.

Specified by:

getSearchContext in interface NodeEvaluationContext

Returns:

The search context.