NavMesh.CalculatePathの最低限の検証用コード

FindPath.cs

using UnityEngine;
using UnityEngine.AI;

public class FindPath : MonoBehaviour {

    [SerializeField] Transform start, goal;
    const int maxPosition = 9; // パスの最大登録数
    
    // パスと、座標リスト。使い回す
    NavMeshPath path = null;
    Vector3[] positions = new Vector3[maxPosition];

    void Awake()
    {
        path = new NavMeshPath();
    }

    void Start ()
    {
        // パスの計算
        NavMesh.CalculatePath(start.localPosition, goal.localPosition, NavMesh.AllAreas, path);
        path.GetCornersNonAlloc(positions);
    }

    private void OnDrawGizmosSelected()
    {
        for (int i = 0; i < positions.Length - 1; i++)
        {
            Gizmos.DrawLine(positions[i], positions[i + 1]);
        }
    }
}