CombineInstance和SkinnedMeshRenderer实现 换装

 //想要换的衣服放入数组
    public GameObject[] arr;
    void Start()
    {
       Mesh mesh = new Mesh();
        List<CombineInstance> combines=new List<CombineInstance>(); 
        List<Material> materials=new List<Material>();
        List<Transform> bones=new List<Transform>();
        // 找到我身上的所有骨骼  //骨骼是本体mesh网格是衣服
        Transform[] mybones = GetComponentsInChildren<Transform>();
        Dictionary<string,Transform> bonesdic=new Dictionary<string,Transform>();

        //遍历我的骨骼  把他们放入字典中 名字作键 transform做值
        foreach (var item in mybones)
        {
            bonesdic.Add(item.name, item);
        }
        for (int i = 0; i < arr.Length; i++)
        {
            materials.Add(arr[i].GetComponentInChildren<SkinnedMeshRenderer>().sharedMaterial);

            CombineInstance instance = new CombineInstance();
            //获取子物体的mesh网格
            instance.mesh = arr[i].GetComponentInChildren<SkinnedMeshRenderer>().sharedMesh;
            //获取位置信息等
            instance.transform = arr[i].transform.localToWorldMatrix;
            combines.Add(instance);

            //看看别人这件衣服是穿在什么位置，我也穿在这个位置
            foreach (var item in arr[i].GetComponentInChildren<SkinnedMeshRenderer>().bones)
            {
                if(bonesdic.ContainsKey(item.name))
                {
                    bones.Add(bonesdic[item.name]);
                }
            }
        }
        mesh.CombineMeshes(combines.ToArray(), false, false);

        GetComponent<SkinnedMeshRenderer>().bones = bones.ToArray();
        GetComponent<SkinnedMeshRenderer>().sharedMesh=mesh;
        GetComponent<SkinnedMeshRenderer>().materials = materials.ToArray();


    }