I want to make an enemy spawn where there are no obstacles within 20 meters of the player's radius

I want to make an enemy spawn where there are no obstacles within 20 meters of the player's radius

Do you have nice idea?

 

Physics.OverlapSphere

 

How to use?

 

Here's a script I've used to spawn gameobjects randomly within a box area which are clear of obstacles. If you tweak it you'll be able to get the behaviour you want. It spawns as many gameobjects as you want up to a maximum. You can set the minimum distance from obstacles and the size of the area to spawn gameobjects in.

Code (CSharp):

1. public class BoxSpawner : MonoBehaviour
2. {
3.     public GameObject ToSpawn;
4.     public int Number;
5.     public float SpawnInterval;
6.     public int StartSpawnAmount;
7.  
8.     public float SizeX = 10f;
9.     public float SizeY = 10f;
10.     public float SizeZ = 10f;
11.  
12.     public float ClearRadius = 1f;
13.     public LayerMask ObstructingLayers;
14.  
15.     float spawnCountdown;
16.     GameObject[] spawned;
17.  
18.     void Awake()
19.     {
20.         spawned = new GameObject[Number];
21.     }
22.  
23.     void Start()
24.     {
25.         for (int i = 0; i < StartSpawnAmount; i++)
26.         {
27.             spawn();
28.         }
29.     }
30.  
31.     void OnEnable()
32.     {
33.         StartCoroutine(SpawnRoutine());
34.     }
35.  
36.     IEnumerator SpawnRoutine()
37.     {
38.         spawnCountdown = SpawnInterval;
39.         while (true)
40.         {
41.             spawnCountdown -= Time.deltaTime;
42.             if (spawnCountdown <= 0f)
43.             {
44.                 spawn();
45.             }
46.             yield return null;
47.         }
48.     }
49.  
50.     int nextAvailableSlot
51.     {
52.         get
53.         {
54.             for (int i = 0; i < spawned.Length; i++)
55.             {
56.                 if (spawned[i] == null) return i;
57.             }
58.             return -1;
59.         }
60.     }
61.  
62.     void spawn()
63.     {
64.         spawnCountdown = SpawnInterval;
65.         var nextSlot = nextAvailableSlot;
66.         if (nextSlot == -1) return; // No spawn slots available
67.  
68.         int nTrys = 0;
69.         Vector3 pos;
70.         do
71.         {
72.             nTrys++;
73.             if (nTrys > 10)
74.             {
75.                 Debug.LogWarning("Failed to find spawn location after 10 tries, aborting.", gameObject);
76.                 return;
77.             }
78.             pos = chooseLocation();
79.         } while (locationIsObstructed(pos));
80.  
81.         var newInst = Instantiate(ToSpawn, pos, transform.rotation) as GameObject;
82.         newInst.transform.SetParent(transform.parent);
83.         spawned[nextSlot] = newInst;
84.     }
85.  
86.     Vector3 chooseLocation()
87.     {
88.         var dims = new Vector3(SizeX / 2f, SizeY / 2f, SizeZ / 2f);
89.         var randVector = new Vector3(Random.Range(-1f, 1f), Random.Range(-1f, 1f), Random.Range(-1f, 1f));
90.         var pos = Vector3.Scale(dims, randVector) + transform.position;
91.         return pos;
92.     }
93.  
94.     bool locationIsObstructed(Vector3 location)
95.     {
96.         return Physics.CheckSphere(location, ClearRadius, ObstructingLayers);
97.     }
98.  
99.     protected static readonly Color NoneColor = Color.green;
100.     protected static readonly Color RedColor = Color.red;
101.     public void OnDrawGizmosSelected()
102.     {
103.         if (!isActiveAndEnabled) return;
104.  
105.         else Gizmos.color = NoneColor;
106.         Gizmos.DrawCube(transform.position, new Vector3(SizeX, SizeY, SizeZ));
107.  
108.         Gizmos.color = RedColor;
109.         Gizmos.DrawSphere(transform.position + Vector3.up * (SizeY / 2f + ClearRadius), ClearRadius);
110.     }
111. }

 

thanks to you problem solved!!!!