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hWeighted.cs
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hWeighted.cs
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using FlashPlanner.Core.Models;
using FlashPlanner.Core.Models.SAS;
using FlashPlanner.Core.States;
namespace FlashPlanner.Core.Heuristics
{
/// <summary>
/// Based on the <seealso href="https://www.fast-downward.org/Doc/Evaluator">weighted Evaluator</seealso>
/// It simply takes a heuristic, and multiplies its value by some constant.
/// </summary>
public class hWeighted : BaseHeuristic
{
/// <summary>
/// The child heuristic
/// </summary>
public IHeuristic Heuristic { get; set; }
/// <summary>
/// The weight to multiply with
/// </summary>
public double Weight { get; set; }
/// <summary>
/// Main constructor
/// </summary>
/// <param name="heuristic"></param>
/// <param name="weight"></param>
public hWeighted(IHeuristic heuristic, double weight)
{
Heuristic = heuristic;
Weight = weight;
}
/// <summary>
/// Get a heuristic value for the current <paramref name="state"/>
/// </summary>
/// <param name="parent"></param>
/// <param name="state"></param>
/// <param name="operators"></param>
/// <returns></returns>
internal override uint GetValueInner(StateMove parent, SASStateSpace state, List<Operator> operators) => (uint)(Heuristic.GetValue(parent, state, operators) * Weight);
}
}