unity 在Mesh中的顶点或者mesh 三角形的中点生成物体

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/BaiYangShouTong/article/details/53613310

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class MeshPoint : MonoBehaviour {

    public GameObject cubePrefab;
    private Vector3[] verticals;
    private List<Vector3> points;
    public Transform cubeperent;

    private float randomOffect;
    private Vector3 pos;
    private Vector3 rotation;
    private float randomRotation;

    private int[] triangleArr;
    string triangle;
    Mesh mesh;
	// Use this for initialization
	void Start () {
        mesh = GetComponent<MeshFilter>().mesh;
        cubeperent = GameObject.Find("Cubes").transform;
        
        //*****************************************************************三角形两个顶点的中点
        triangleArr = mesh.triangles;
        points = new List<Vector3>(mesh.vertices);
        //三角形的个数
        int size = mesh.triangles.Length;

        for(int i=0;i<200;i++ )
        {
            //一个三角形、三个点(第几个三角形)
            int tt = Random.Range(0,size/3);

            int index1= triangleArr[3 * tt];
            int index2= triangleArr[3 * tt+1];

            Debug.Log(index1+"  "+index2);
           
            //那个顶点
            Vector3 point1 = points[index1];
            Vector3 point2 = points[index2];

            Debug.Log(point1 + "  " + point2);

            //中点
            Vector3 point3 = (point1 +point2) / 2.0f;
            Instantiate(cubePrefab, point3, Quaternion.Euler(rotation), cubeperent);
        }
            
        cubeperent.transform.position = new Vector3(0, 119.4179f, 0);
        cubeperent.transform.rotation = Quaternion.Euler(new Vector3(-90.26f, 0, 0));
        //----------------------------------------------------------------------------------------------------

        //Debug.Log(GetComponent<MeshFilter>().mesh.vertices.Length);
        //******************************************************************************************根据顶点
        //verticals = GetComponent<MeshFilter>().mesh.vertices;
        //points = new List<Vector3>(verticals);

        //for (int j = 0; j < 400; j++)
        //{
        //    int a = Random.Range(0, points.Count);
        //    randomOffect = Random.Range(-0.4f,0.4f);
        //    randomRotation = Random.Range(0,360);
            
        //    pos = new Vector3(points[a].x + randomOffect, points[a].y+randomOffect, points[a].z + randomOffect);
        //    rotation = new Vector3(transform.rotation.x + randomRotation, transform.rotation.y + randomRotation, transform.rotation.z + randomRotation);
        //    Instantiate(cubePrefab, pos, Quaternion.Euler(rotation), cubeperent);

        //    points.RemoveAt(a);

        //}

        //*******************************************************************************************************

        cubeperent.transform.position = new Vector3(0, 119.4179f, 0);
        cubeperent.transform.rotation = Quaternion.Euler(new Vector3(-90.26f, 0, 0));
	}
	
	// Update is called once per frame
	void Update () {
	
	}
}