【Unity项目实践】野怪生成系统

分为两个部分，一个是获取野怪生成点的数据，二是生成野怪。

获取野怪生成点的数据

（1）通过放置物体来定位我们想要让其生成的位置，并且附加上一个脚本用来在编辑模式下显示物体。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[ExecuteInEditMode]
public class SpawnPoint : MonoBehaviour
{
    Mesh mesh = null;
    public int ID;

    // Start is called before the first frame update
    void Start()
    {
        this.mesh = this.GetComponent<MeshFilter>().sharedMesh;
    }

    // Update is called once per frame
    void Update()
    {
        
    }

#if UNITY_EDITOR
    private void OnDrawGizmos()
    {
        Vector3 pos = this.transform.position + Vector3.up * this.transform.localScale.y * .5f;
        Gizmos.color = Color.red;

        if (this.mesh != null)
            Gizmos.DrawWireMesh(this.mesh, pos, this.transform.rotation, this.transform.localScale);

        UnityEditor.Handles.color = Color.red;
        UnityEditor.Handles.ArrowHandleCap(0, pos, this.transform.rotation, 1f, EventType.Repaint);
        UnityEditor.Handles.Label(pos, "SpawnPoint:" + this.ID);
    }
#endif
}

（2）写一个编辑器扩展脚本用于生成数据

 [MenuItem("Map Tools/Export SpawnPoints")]
    public static void ExportSpawnPoints()
    {
        DataManager.Instance.Load();

        Scene current = EditorSceneManager.GetActiveScene();
        string currentScene = current.name;

        if (current.isDirty)
        {
            EditorUtility.DisplayDialog("提示", "请先保存当前场景", "确定");
            return;
        }

        if (DataManager.Instance.SpawnPoints == null)
            DataManager.Instance.SpawnPoints = new Dictionary<int, Dictionary<int, SpawnPointDefine>>();

        foreach (var map in DataManager.Instance.Maps)
        {
            string sceneFile = "Assets/Levels/" + map.Value.Resource + ".unity";
            if (!System.IO.File.Exists(sceneFile))
            {
                Debug.LogWarningFormat("Scene {0} not existed!", sceneFile);
                continue;
            }
            EditorSceneManager.OpenScene(sceneFile, OpenSceneMode.Single);

            SpawnPoint[] spawnPoints = GameObject.FindObjectsOfType<SpawnPoint>();

            if (!DataManager.Instance.SpawnPoints.ContainsKey(map.Value.ID))
            {
                DataManager.Instance.SpawnPoints[map.Value.ID] = new Dictionary<int, SpawnPointDefine>();
            }

            foreach (var sp in spawnPoints)
            {
                if (!DataManager.Instance.SpawnPoints[map.Value.ID].ContainsKey(sp.ID))
                {
                    DataManager.Instance.SpawnPoints[map.Value.ID][sp.ID] = new SpawnPointDefine();
                }

                SpawnPointDefine def = DataManager.Instance.SpawnPoints[map.Value.ID][sp.ID];
                def.ID = sp.ID;
                def.MapID = map.Value.ID;
                def.Position = GameObjectTool.WorldToLogicN(sp.transform.position);
                def.Direction = GameObjectTool.WorldToLogicN(sp.transform.forward);
            }
        }

        DataManager.Instance.SaveSpawnPoints();
        EditorSceneManager.OpenScene("Assets/Levels/" + currentScene + ".unity");
        EditorUtility.DisplayDialog("提示", "刷怪点导出完成", "确定");

    }

然后点击运行即可生成。

文件如下：

生成野怪

野怪是生成在地图上的，并且对于不同的玩家，野怪都是一样的，所以野怪应该卸载地图加载的逻辑中，并且是在服务端定时生成的，和客户端解耦。

服务端总体的野怪生成逻辑如下图所示：

野怪生成的时候服务端的Log如下：