Unity3D Mesh网格合并

首先我们需要再3d场景创建一个空对象，把脚本挂给空对象

然后创建3D物体进行合并

然后我们在吧自己的MeshFiler和MeshRanderer拖上去

脚本代码

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

public class HeBing : MonoBehaviour
{
    public MeshFilter[] meshFilters;//合并网格过滤器的集合
    public MeshFilter meshFilter;//自身的网格过滤器

    public MeshRenderer[] Resnderers;//网格渲染器
    public MeshRenderer meshRanderer;//自身的网格渲染器
    // Start is called before the first frame update
    void Start()
    {
        Mesh mesh = new Mesh();//初始化mesh
        List<Material> materials = new List<Material>();//合并对象的材质集合
        List<CombineInstance> combines = new List<CombineInstance>();//组合集合
        //给combines中的子类赋值
        for (int i = 0; i < meshFilters.Length; i++)
        {
            CombineInstance combine = new CombineInstance();
            combine.mesh = meshFilters[i].mesh;
            combine.transform = meshFilters[i].transform.localToWorldMatrix;
            combines.Add(combine);
            foreach (var item in Resnderers[i].materials)
            {
                materials.Add(item);//添加到集合中
            }
        }
        mesh.CombineMeshes(combines.ToArray(), false);//给mesh中的CombineMeshes赋值
        meshFilter.mesh = mesh;//给网格过滤器的mesh赋值
        meshRanderer.materials = materials.ToArray();//给网格渲染赋材质


    }

    // Update is called once per frame
    void Update()
    {
        
    }
}