POIMap.cs

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using System;
 
public class POIMap
{
    public class Cell
    {
        public int x;
 
        public int z;
 
        public bool occupied;
 
        public Point GetCenter()
        {
            return new Point(x * cellSize + cellSize / 2, z * cellSize + cellSize / 2).Clamp();
        }
    }
 
    public static int cellSize;
 
    public static int mapSize;
 
    public Cell[,] cells;
 
    public int length => mapSize / cellSize + 1;
 
    public void Init(int _mapSize, int _cellSize)
    {
        cellSize = _cellSize;
        mapSize = _mapSize;
        cells = new Cell[length, length];
        Reset();
    }
 
    public void Reset()
    {
        for (int i = 0; i < length; i++)
        {
            for (int j = 0; j < length; j++)
            {
                cells[i, j] = new Cell
                {
                    x = i,
                    z = j
                };
            }
        }
    }
 
    public Point GetCenterOfEmptyCell(int tries = 100)
    {
        new Point();
        for (int i = 0; i < tries; i++)
        {
            int num = EClass.rnd(length - 2) + 1;
            int num2 = EClass.rnd(length - 2) + 1;
            if (!cells[num, num2].occupied)
            {
                return cells[num, num2].GetCenter();
            }
        }
        return Point.Invalid;
    }
 
    public Cell GetCenterCell(int radius = 1)
    {
        return cells[length / 2 - radius + EClass.rnd(radius * 2), length / 2 - radius + EClass.rnd(radius * 2)];
    }
 
    public Cell GetEmptyCell()
    {
        new Point();
        for (int i = 0; i < 100; i++)
        {
            int num = EClass.rnd(length - 2) + 1;
            int num2 = EClass.rnd(length - 2) + 1;
            if (cells[num, num2] == null)
            {
                return cells[num, num2];
            }
        }
        return null;
    }
 
    public void ForeachCenterOfEmptyCell(Action<Point> action)
    {
        for (int i = 1; i < length - 2; i++)
        {
            for (int j = 1; j < length - 2; j++)
            {
                if (!cells[i, j].occupied)
                {
                    action(cells[i, j].GetCenter());
                }
            }
        }
    }
 
    public void OccyupyPOI(Point p, int radius = 0)
    {
        OccyupyPOI(p.x, p.z, radius);
    }
 
    public void OccyupyPOI(int _x, int _z, int radius)
    {
        int num = _x / cellSize;
        int num2 = _z / cellSize;
        cells[num, num2].occupied = true;
        if (radius <= 0)
        {
            return;
        }
        for (int i = num - radius; i < num + radius + 1; i++)
        {
            if (i < 0 || i >= length)
            {
                continue;
            }
            for (int j = num2 - radius; j < num2 + radius + 1; j++)
            {
                if (j >= 0 && j < length)
                {
                    cells[i, j].occupied = true;
                }
            }
        }
    }
}