Unity性能优化篇(十) 模型优化之网格合并 Easy Mesh Combine Tool插件使用以及代码实现网格合并

news2025/6/17 6:24:52

把多个模型的网格合并为一个网格。可以使用自己写代码，使用Unity自带的CombineMeshes方法，也可以使用资源商店的插件，在资源商店搜Mesh Combine可以搜索到相关的插件，例如Easy Mesh Combine Tool等插件。
可大幅度减少Batches数量减少模型的顶点、面、材质、骨骼、蒙皮网格。
写代码使用CombineMeshes方法实现网格合并:
1.测试脚本挂载在需要合并的物体身上
在这里插入图片描述
2.代码逻辑

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

public class MeshCombineTest : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        CombineTest();
    }

    public void CombineTest()
    {
        MeshFilter[] meshFilters = GetComponentsInChildren<MeshFilter>();
        CombineInstance[] combine = new CombineInstance[meshFilters.Length];
        Material[] mats = new Material[meshFilters.Length];
        Matrix4x4 matrix = transform.worldToLocalMatrix;
        for (int i = 0; i < meshFilters.Length; i++)
        {
            MeshFilter mf = meshFilters[i];
            MeshRenderer mr = meshFilters[i].GetComponent<MeshRenderer>();
            if (mr == null)
            {
                continue;
            }
            combine[i].mesh = mf.sharedMesh;
            combine[i].transform = mf.transform.localToWorldMatrix * matrix;
            mr.enabled = false;
            mats[i] = mr.sharedMaterial;
        }
        //新建一个物体 用来接收合并后的数据
        GameObject go = new GameObject("NewGameobject");
        go.AddComponent<MeshFilter>();
        go.AddComponent<MeshRenderer>();
        //赋值位置信息
        go.transform.localPosition = transform.localPosition;
        go.transform.localRotation = transform.localRotation;
        //赋值合并后的网格
        MeshFilter thisMeshFilter = go.GetComponent<MeshFilter>();
        Mesh mesh = new Mesh();
        mesh.name = "Combined";
        thisMeshFilter.mesh = mesh;
        mesh.CombineMeshes(combine, false);
        //赋值合并后的材质信息
        MeshRenderer thisMeshRenderer = go.GetComponent<MeshRenderer>();
        thisMeshRenderer.sharedMaterials = mats;
        thisMeshRenderer.enabled = true;

        MeshCollider thisMeshCollider = GetComponent<MeshCollider>();
        if (thisMeshCollider != null)
        {
            thisMeshCollider.sharedMesh = mesh;
        }
        //合并后隐藏自己
        gameObject.SetActive(false);
    }
}