PathManager.cs

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using System.Collections.Generic;
using System.Threading;
using Algorithms;
using UnityEngine;
 
public class PathManager : MonoBehaviour
{
    public enum MoveType
    {
        Default,
        Combat
    }
 
    public static int requestCount;
 
    public static PathManager Instance;
 
    public static PathProgress tempProgress = new PathProgress();
 
    public PathFinder _pathfinder;
 
    public int searchLimit = 1000000;
 
    public IPathfinder pathfinder => _pathfinder;
 
    private void Awake()
    {
        Instance = this;
    }
 
    public void RequestPath(PathProgress progress)
    {
        requestCount++;
        progress.state = PathProgress.State.Searching;
        ThreadPool.QueueUserWorkItem(delegate
        {
            new PathThread().Start(progress);
        });
    }
 
    public void RequestPathImmediate(PathProgress progress)
    {
        requestCount++;
        pathfinder.FindPath(progress);
    }
 
    public bool IsPathClear(Point origin, Point dest, IPathfindWalker walker, int radius)
    {
        tempProgress.walker = walker;
        tempProgress.moveType = MoveType.Default;
        tempProgress.RequestPathImmediate(origin, dest, 0, _ignoreConnection: false);
        if (tempProgress.nodes.Count > 0)
        {
            return tempProgress.nodes.Count < radius;
        }
        return false;
    }
 
    public PathProgress RequestPathImmediate(Point origin, Point dest, IPathfindWalker walker, MoveType moveType = MoveType.Default, int searchLimit = -1, int destDist = 0)
    {
        tempProgress.walker = walker;
        tempProgress.moveType = moveType;
        tempProgress.RequestPathImmediate(origin, dest, destDist, _ignoreConnection: false, searchLimit);
        return tempProgress;
    }
 
    public Point GetFirstStep(Point origin, Point _dest, IPathfindWalker walker, int maxDist = 20, MoveType moveType = MoveType.Default)
    {
        Point dest = _dest.Copy();
        Point point = _GetFirstStep(origin, dest, walker, maxDist, moveType);
        if (point.IsValid)
        {
            return point;
        }
        return Point.Invalid;
    }
 
    public Point _GetFirstStep(Point origin, Point dest, IPathfindWalker walker, int maxDist = 20, MoveType moveType = MoveType.Default)
    {
        if (!dest.IsValid || (dest.cell.blocked && origin.Distance(dest) <= 1))
        {
            return Point.Invalid;
        }
        tempProgress.walker = walker;
        tempProgress.moveType = moveType;
        tempProgress.RequestPathImmediate(origin, dest, (moveType == MoveType.Combat) ? 1 : 0, _ignoreConnection: false, maxDist);
        if (!tempProgress.HasPath)
        {
            return Point.Invalid;
        }
        List<PathFinderNode> nodes = tempProgress.nodes;
        if (nodes.Count > 0)
        {
            PathFinderNode pathFinderNode = nodes[nodes.Count - 1];
            if (pathFinderNode.X == origin.x && pathFinderNode.Z == origin.z && nodes.Count > 1)
            {
                pathFinderNode = nodes[nodes.Count - 2];
            }
            if (Mathf.Abs(pathFinderNode.X - origin.x) > 1 || Mathf.Abs(pathFinderNode.Z - origin.z) > 1)
            {
                return Point.Invalid;
            }
            Point point = new Point(pathFinderNode.X, pathFinderNode.Z);
            if (point.x == origin.x && point.z == origin.z)
            {
                return Point.Invalid;
            }
            return point;
        }
        return Point.Invalid;
    }
 
    public void OnGridModified()
    {
    }
}