using UnityEngine;using System.Collections;using System.Collections.Generic;public class CombineMesh : MonoBehaviour{    void OnGUI()    {        if (GUI.Button(new Rect(0, 0, 200, 30), "CombineMeshes"))        {            CombineMeshes();        }    }    public void CombineMeshes()    {        SkinnedMeshRenderer[] smr = gameObject.GetComponentsInChildren<SkinnedMeshRenderer>();        List<CombineInstance> combineInstances = new List<CombineInstance>();        List<Material> materials = new List<Material>();        List<Transform> bones = new List<Transform>();        for (int i = 0; i < smr.Length; i++)        {            materials.AddRange(smr[i].materials);            bones.AddRange(smr[i].bones);            // 收集待合并的對(duì)象信息            for (int k = 0; k < smr[i].sharedMesh.subMeshCount; k++)            {                CombineInstance ci = new CombineInstance();                ci.mesh = smr[i].sharedMesh;                ci.subMeshIndex = k;                combineInstances.Add(ci);            }            // 刪除原有模型的對(duì)象(如果有還原外觀的需求，也可以暫時(shí)將對(duì)象的活動(dòng)狀態(tài)設(shè)置為false，代碼如下)            // smr[i].gameObject.SetActive(false);            Destroy(smr[i].gameObject);        }        // 創(chuàng)建新的SkinnedMeshRenderer，合并后的mesh數(shù)據(jù)都在該對(duì)象下        SkinnedMeshRenderer combinedSMR = gameObject.GetComponent<SkinnedMeshRenderer>();        if (combinedSMR == null)        {            combinedSMR = gameObject.AddComponent<SkinnedMeshRenderer>();        }        combinedSMR.sharedMesh = new Mesh();        combinedSMR.bones = bones.ToArray();        combinedSMR.materials = materials.ToArray();        combinedSMR.rootBone = gameObject.transform;        // 由于合并mesh的material數(shù)據(jù)不統(tǒng)一，因此第二項(xiàng)參數(shù)不能設(shè)置為true        combinedSMR.sharedMesh.CombineMeshes(combineInstances.ToArray(), false, false);    }}運(yùn)行結(jié)果：可以看到合并后人物的各個(gè)部件都合并到新創(chuàng)建的skinnenMeshRenderer下了，Unity Editor中Statistics中visible skinned meshes的數(shù)量也由9個(gè)變成了1個(gè)。總結(jié)分析性能方面會(huì)由于skinned mesh renderer的減少而減輕cpu的負(fù)擔(dān)，而在代碼中然而在導(dǎo)入模型資源時(shí)，需要將read/write enabled打鉤。而該選項(xiàng)會(huì)增加內(nèi)存的占用，mesh為了可以在代碼中進(jìn)行修改，需要保留一份拷貝而駐留內(nèi)存。官方的說(shuō)明如下：Read/Write EnabledIf enabled, Mesh data is kept in memory so that a custom script can read and change it. Disabling this option saves memory, because Unity can unload a copy of Mesh data in the game. However, in certain cases when the Mesh is used with a Mesh Collider, this option must be enabled.