using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class AvatarSystem : MonoBehaviour {

    //模型全文件

    GameObject modelObject;

    Transform modelSource;

    //骨骼文件

    GameObject targetSource;

    Transform targetTrans;

    //Data字典 存储source的各种信息；

    private Dictionary<string, Dictionary<string, Transform>> data = new Dictionary<string, Dictionary<string, Transform>>();

    //targetSmr字典 存储目标的骨骼信息

    private Dictionary<string, SkinnedMeshRenderer> targetSmr = new Dictionary<string, SkinnedMeshRenderer>();

    //骨骼数组

    private Transform[] hips;

    //套装数据

    string[,] avatarStr = new string[,] { { "Glove", "suit01" }, { "Head", "suit01" }, { "Hair", "suit01" }, { "Body", "suit02" }, { "Leg", "suit03" }, { "Shoe", "suit03" } };

    // Use this for initialization

    void Start () {

        InstantiateAvatar("Prefab/Model_girl");//读取模型文件

        InstantiateSkeleton("Prefab/Target_girl");//读取骨架文件

        LoadAvatarData(modelSource);//读取模型所有衣服数据，并且存储

        hips = targetTrans.GetComponentsInChildren<Transform>();//拿取人物骨骼信息

        Inivatar(avatarStr);//换上套装

        //targetSource.AddComponent<Animator>();

    }

    // Update is called once per frame

    void Update () {

    }

    //实例化来源

    void InstantiateAvatar(string modelName)

    {

        //必需得实例化出来，不然无法获得数据

        modelObject = (Instantiate(Resources.Load<GameObject>(modelName)));

        modelSource = modelObject.transform;

        modelSource.gameObject.SetActive(false);//隐藏

        //Destroy(modelObject);//销毁

    }

    //实例化骨架（换装就是在骨架上加衣服）

    void InstantiateSkeleton(string targetName)

    {

        targetSource = Instantiate(Resources.Load<GameObject>(targetName));

        targetTrans = targetSource.transform;

    }

    //读取来源的各种信息(source模型源文件)

    void LoadAvatarData(Transform source)

    {

        if (source == null)

        {

            return;

        }

        SkinnedMeshRenderer[] parts = source.GetComponentsInChildren<SkinnedMeshRenderer>(true);

        foreach (SkinnedMeshRenderer part in parts)

        {

            string[] partName = part.name.Split('_');

            if (!data.ContainsKey(partName[]))

            {

                data.Add(partName[], new Dictionary<string, Transform>());

                GameObject partObj = new GameObject();

                partObj.name = partName[];

                partObj.transform.parent = targetTrans;

                targetSmr.Add(partName[], partObj.AddComponent<SkinnedMeshRenderer>());

            }

            data[partName[]].Add(partName[], part.transform);

        }

    }

    //更改Mesh

    public void ChangeMesh(string part, string item)

    {

        SkinnedMeshRenderer smr = data[part][item].GetComponent<SkinnedMeshRenderer>();

        //网格合并

        List<CombineInstance> combineInstances = new List<CombineInstance>();

        for (int i = ; i < smr.sharedMesh.subMeshCount; i++)

        {

            CombineInstance ci = new CombineInstance();

            ci.mesh = smr.sharedMesh;

            ci.subMeshIndex = i;

            combineInstances.Add(ci);

        }

        List<Transform> bones = new List<Transform>();

        foreach (Transform bone in smr.bones)

        {

            foreach (Transform hip in hips)

            {

                if (hip.name != bone.name)

                {

                    continue;

                }

                bones.Add(hip);

                break;

            }

        }

        //网格合并方式

        targetSmr[part].sharedMesh = new Mesh();

        targetSmr[part].sharedMesh.CombineMeshes(combineInstances.ToArray(), false, false);

        //非网格合并方式

        //targetSmr[part].sharedMesh = smr.sharedMesh;

        targetSmr[part].bones = bones.ToArray();

        targetSmr[part].materials = smr.materials;

    }

    /// <summary>

    /// 换装（换1件到多件）

    /// </summary>

    /// <param name="avatarStr"></param>

    public void Inivatar(string[,] avatarStr)

    {

        int nLength = avatarStr.GetLength();

        for (int i = ; i < nLength; i++)

        {

            ChangeMesh(avatarStr[i, ], avatarStr[i, ]);

        }

    }

}