Zero/ZeroLevel.HNSW/Model/NSWOptions.cs

using System;

namespace ZeroLevel.HNSW
{
    public sealed class NSWOptions<TItem>
    {
        public const int FARTHEST_DIVIDER = 3;

        /// <summary>
        /// Mox node connections on Layer
        /// </summary>
        public readonly int M;

        /// <summary>
        /// Max search buffer
        /// </summary>
        public readonly int EF;
        /// <summary>
        /// Max search buffer for inserting
        /// </summary>
        public readonly int EFConstruction;
        /// <summary>
        /// Distance function beetween vectors
        /// </summary>
        public readonly Func<TItem, TItem, float> Distance;

        public readonly int LayersCount;


        private NSWOptions(int layersCount, int m, int ef, int ef_construction, Func<TItem, TItem, float> distance)
        {
            LayersCount = layersCount;
            M = m;
            EF = ef;
            EFConstruction = ef_construction;
            Distance = distance;
        }

        public static NSWOptions<TItem> Create(int layersCount, int M, int EF, int EF_construction, Func<TItem, TItem, float> distance) =>
            new NSWOptions<TItem>(layersCount, M, EF, EF_construction, distance);
    }
}