74 lines
2.0 KiB
Java
74 lines
2.0 KiB
Java
package baritone.bot.pathing.calc;
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import baritone.bot.pathing.goals.Goal;
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import baritone.bot.pathing.movement.Movement;
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import net.minecraft.util.math.BlockPos;
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import java.util.Objects;
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/**
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* A node in the path, containing the cost and steps to get to it.
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*
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* @author leijurv
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*/
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class PathNode {
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final BlockPos pos;
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final Goal goal;
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final double estimatedCostToGoal;
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// These three fields are mutable and are changed by PathFinder
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double cost;
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PathNode previous;
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Movement previousMovement;
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/**
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* Is this a member of the open set in A*? (only used during pathfinding)
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*/
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boolean isOpen;
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/**
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* In the linked list of open nodes, which one is next? (only used during pathfinding)
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*/
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PathNode nextOpen;
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public PathNode(BlockPos pos, Goal goal) {
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this.pos = pos;
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this.previous = null;
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this.cost = Short.MAX_VALUE;
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this.goal = goal;
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this.estimatedCostToGoal = goal.heuristic(pos);
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this.previousMovement = null;
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this.isOpen = false;
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}
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/**
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* TODO: Possibly reimplement hashCode and equals. They are necessary for this class to function but they could be done better
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*
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* @return The hash code value for this {@link PathNode}
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*/
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@Override
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public int hashCode() {
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int hash = 3241;
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hash = 3457689 * hash + this.pos.getX();
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hash = 8734625 * hash + this.pos.getY();
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hash = 2873465 * hash + this.pos.getZ();
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// Don't call goal.hashCode(). this calls objects hashcode to verify that the actual goal objects are == identical, which is important for node caching
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hash = 3241543 * hash + Objects.hashCode(this.goal);
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return hash;
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}
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@Override
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public boolean equals(Object obj) {
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if (obj == null || !(obj instanceof PathNode))
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return false;
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final PathNode other = (PathNode) obj;
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return Objects.equals(this.pos, other.pos) && Objects.equals(this.goal, other.goal);
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}
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}
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