unity3d 随机物体生成器 工具

根据输入的物体生成随机成组的物体.

/// <summary>
/// 本脚本可以由输入的预制 生成以本物体为中心的随机预制,支持预制打组
/// 随机物体生成器(尤其试用于场景中静态物体随机摆放)
/// </summary>
using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class PrefabMixer : MonoBehaviour
{
    [Tooltip("输入预制")]
    public GameObject[]
        inputPrefabs;
    [Tooltip("生成多少组")]
    public int
        maxGroupsNum = 3;
    [Tooltip("每组最多的个数")]
    public int
        maxEachGroupsNum = 5;
    [Tooltip("距离中心的距离")]
    public float
        distanceToSpawn = 50f;
    [Tooltip("缩放范围")]
    public float
        scaleToSpawn = 5f;

    //一共生成多少组
    public List<Transform> asteroidsGroupList = new List<Transform> ();
    //生成的陨石总数
    private List<Transform> asteroidsList = new List<Transform> ();

    private Transform _cacheTransform;

    void OnEnable ()
    {
        ResetList ();
        _cacheTransform = transform;
        Debug.Log("Cache Transform !!");
    }
    
    void OnDisable ()
    {
        ResetList ();
    }

    public void GenerateAsteroids ()
    {
        if (inputPrefabs == null || inputPrefabs.Length <= 0)
        {
            Debug.LogError ("预制不能为空哦 !");
            return;
        }

        if(_cacheTransform == null)
        {
            _cacheTransform = transform;
        }

        int tempMap = 0;
        ResetList ();
        //按组数来判断
        while (asteroidsGroupList.Count < maxGroupsNum) {

            Transform o = new GameObject ("AsteroidsMap_" + tempMap ++).transform;
            o.localPosition = _cacheTransform.position;
            o.localRotation = Quaternion.identity;
            o.localScale = Vector3.one;
            if(o.GetComponent<RotateSelf>() == null)
                o.gameObject.AddComponent<RotateSelf>();
            o.GetComponent<RotateSelf>().speed = Random.Range(1,5f);


            for (int i = 0; i<Random.Range(1,maxEachGroupsNum + 1); i++) {
                if (GetRandomPrefab () == null)
                    continue;
                GameObject asteroid = Instantiate (GetRandomPrefab ()) as GameObject;
                asteroid.transform.parent = o.transform;
                asteroid.name = "asteroid_" + GetRandomPrefab ().name + "_" + i;
                asteroid.transform.localRotation = Quaternion.Euler (Random.Range (0, 360), Random.Range (0, 360), Random.Range (0, 360));
                asteroid.transform.localPosition = Random.insideUnitSphere * distanceToSpawn;
                asteroid.transform.localScale = new Vector3 (Random.Range (1, scaleToSpawn), Random.Range (1, scaleToSpawn), Random.Range (1, scaleToSpawn));

            }
            asteroidsGroupList.Add (o);
        }
    }

    public void ResetList ()
    {
        for (int i = 0; i < asteroidsGroupList.Count && asteroidsGroupList.Count > 0; i++) {
            if(asteroidsGroupList [i] == null)
                continue;
//            #if UNITY_3_5
//            asteroidsGroupList[i].gameObject.active = false;        
//            #endif
//            asteroidsGroupList [i].gameObject.SetActive (false);
            DestroyImmediate(asteroidsGroupList [i].gameObject);

        }

        if (asteroidsGroupList.Count > 0)
            asteroidsGroupList.Clear ();
    }

    GameObject GetRandomPrefab ()
    {
        if (inputPrefabs != null && inputPrefabs.Length > 0)
            return inputPrefabs [Random.Range (0, inputPrefabs.Length)];
        return null;
    }
    
}

/// <summary>
/// Prefab mixer editor.
/// </summary>
using UnityEditor;
using UnityEngine;
using System.Collections.Generic;

[CustomEditor(typeof(PrefabMixer))]
public class PrefabMixerEditor : Editor {
    SerializedObject myTarget;
    
    SerializedProperty maxEachGroupsNum;
    SerializedProperty maxGroupsNum;
    SerializedProperty distanceToSpawn;
    SerializedProperty scaleToSpawn;
    SerializedProperty GenerateAsteroids;
//    SerializedProperty asteroidsGroupList;


    PrefabMixer prefabMixer;
    private List<Transform> asteroidsGroupList = new List<Transform> ();

    void OnEnable()
    {
        myTarget = new SerializedObject(target);

        maxGroupsNum = myTarget.FindProperty("maxGroupsNum");
        maxEachGroupsNum = myTarget.FindProperty("maxEachGroupsNum");
        distanceToSpawn = myTarget.FindProperty("distanceToSpawn");
        scaleToSpawn = myTarget.FindProperty("scaleToSpawn");
//        asteroidsGroupList = myTarget.FindProperty("asteroidsGroupList");

        //获得实例
        prefabMixer = target as PrefabMixer;
        asteroidsGroupList = prefabMixer.asteroidsGroupList;

    }
        
    private bool _showPrefabs = true;

    public override void OnInspectorGUI()
    {
        myTarget.Update();        

        EditorGUILayout.Separator();
            
        _showPrefabs = EditorGUILayout.Foldout(_showPrefabs, "单个预制");
        EditorGUIUtility.LookLikeInspector();
        if (_showPrefabs) {
            ArrayGUI(myTarget, "inputPrefabs");                
        }        
        EditorGUIUtility.LookLikeControls();    

        EditorGUILayout.Separator();

        maxGroupsNum.intValue = EditorGUILayout.IntSlider("生成多少组", maxGroupsNum.intValue, 1, 1000);
        EditorGUILayout.Separator();

        maxEachGroupsNum.intValue = EditorGUILayout.IntSlider("每组最多的个数", maxEachGroupsNum.intValue, 1, 100);
        EditorGUILayout.Separator();

        distanceToSpawn.floatValue = EditorGUILayout.Slider("距离中心的距离", distanceToSpawn.floatValue, 1f, 100f);
        EditorGUILayout.Separator();

        scaleToSpawn.floatValue = EditorGUILayout.Slider("缩放范围", scaleToSpawn.floatValue, 1f, 10f);
        EditorGUILayout.Separator();

        if(GUILayout.Button("生成"))
        {
            prefabMixer.GenerateAsteroids();
        }
        EditorGUILayout.Separator();

        if(GUILayout.Button("清空"))
        {
            prefabMixer.ResetList();
        }
        EditorGUILayout.Separator();

        myTarget.ApplyModifiedProperties();
    }


    void ArrayGUI(SerializedObject obj, string name) {    
        int size = obj.FindProperty(name + ".Array.size").intValue;
        int newSize = EditorGUILayout.IntField("数量", size);
        if (newSize != size) obj.FindProperty(name + ".Array.size").intValue = newSize;
        EditorGUI.indentLevel = 3;
        for (int i=0;i<newSize;i++) {
            var prop = obj.FindProperty(string.Format("{0}.Array.data[{1}]", name, i));
            EditorGUILayout.PropertyField(prop);    
        }
        EditorGUI.indentLevel = 0;
    }    
}