103 lines
2.5 KiB
C#
103 lines
2.5 KiB
C#
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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public class OctreeManager : MonoBehaviour
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{
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public GameObject[] parents;
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private float cellSize = 250f;
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private Dictionary<Vector2Int, List<GameObject>> grid = new Dictionary<Vector2Int, List<GameObject>>();
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// Start is called before the first frame update
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void Start()
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{
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//get all objects with mapzone tag, assign to parents array
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parents = GameObject.FindGameObjectsWithTag("mapzone");
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for (int i = 0; i < parents.Length; i++)
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{
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GameObject[] children = getChildren(parents[i]);
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if (children == null) return;
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//get all children of parents[i]
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for (int j = 0; j < children.Length; j++)
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{
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Vector3 position = children[j].transform.position;
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Vector2Int cell = new Vector2Int(
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Mathf.FloorToInt(position.x / cellSize),
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Mathf.FloorToInt(position.z / cellSize));
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if (!grid.ContainsKey(cell))
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{
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grid[cell] = new List<GameObject>();
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}
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grid[cell].Add(children[j]);
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children[j].SetActive(false);
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}
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}
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}
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// Update is called once per frame
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void Update()
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{
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Vector3 playerPosition = Player.Instance.transform.position;
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Vector2Int playerCell = new Vector2Int(
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Mathf.FloorToInt(playerPosition.x / cellSize),
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Mathf.FloorToInt(playerPosition.z / cellSize));
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// Iterate through neighboring cells
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for (int x = playerCell.x - 1; x <= playerCell.x + 1; x++)
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{
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for (int y = playerCell.y - 1; y <= playerCell.y + 1; y++)
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{
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Vector2Int cell = new Vector2Int(x, y);
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if (grid.ContainsKey(cell))
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{
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foreach (var obj in grid[cell])
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{
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// Compare squared distances for faster calculation
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Vector2 offset = new Vector2(obj.transform.position.x, obj.transform.position.z) - new Vector2(playerPosition.x, playerPosition.z);
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float distanceSquared = Vector2.SqrMagnitude(offset);
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// Set your threshold distance squared here
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float hideDistanceSquared = 15000f;
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if (distanceSquared <= hideDistanceSquared)
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{
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obj.SetActive(true); // Show the object
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}
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else
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{
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obj.SetActive(false); // Hide the object
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}
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}
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}
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}
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}
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}
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private GameObject[] getChildren(GameObject g)
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{
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if (g.transform.childCount == 0)
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{
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return null;
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}
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else
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{
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GameObject[] children = new GameObject[g.transform.childCount];
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for (int i = 0; i < g.transform.childCount; i++)
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{
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children[i] = g.transform.GetChild(i).gameObject;
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}
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return children;
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}
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}
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}
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