Mesh

描述

用于通过脚本创建或修改网格的类。

Meshes contain vertices and multiple triangle arrays.

三角形数组是顶点数组的简单索引；每个三角形三个索引。

For every vertex there can be a normal, two texture coordinates, color and tangent. These are optional though and can be removed at will. All vertex information is stored in separate arrays of the same size, so if your mesh has 10 vertices, you would also have 10-size arrays for normals and other attributes.

您可能需要将可修改的网格接口用于 3 种用途：

有三种常见任务可能需要使用网格 API：

1.从头开始构建网格： 应始终按以下顺序进行：
a) 分配 vertices
b) 分配 triangles。

using UnityEngine;

public class Example : MonoBehaviour
{
    Vector3[] newVertices;
    Vector2[] newUV;
    int[] newTriangles;

   void Start()
    {
        Mesh mesh = new Mesh();
        GetComponent<MeshFilter>().mesh = mesh;
        mesh.vertices = newVertices;
        mesh.uv = newUV;
        mesh.triangles = newTriangles;
    }
}

2.每一帧都修改顶点属性：
a) 获取顶点
b) 修改它们
c) 将它们分配回网格。

using UnityEngine;

public class Example : MonoBehaviour
{
    void Update()
    {
        Mesh mesh = GetComponent<MeshFilter>().mesh;
        Vector3[] vertices = mesh.vertices;
        Vector3[] normals = mesh.normals;

       for (var i = 0; i < vertices.Length; i++)
        {
            vertices[i] += normals[i] * Mathf.Sin(Time.time);
        }

       mesh.vertices = vertices;
    }
}

3.连续更改网格三角形和顶点：
a) 调用 Clear 以开始刷新
b) 分配顶点和其他属性
c) 分配三角形索引。

It is important to call Clear before assigning new vertices or triangles. Unity always checks the supplied triangle indices whether they don't reference out of bounds vertices. Calling Clear then assigning vertices then triangles makes sure you never have out of bounds data.

using UnityEngine;

public class ExampleClass : MonoBehaviour
{
    Vector3[] newVertices;
    Vector2[] newUV;
    int[] newTriangles;

   void Start()
    {
        Mesh mesh = GetComponent<MeshFilter>().mesh;

       mesh.Clear();

       // Do some calculations...
        mesh.vertices = newVertices;
        mesh.uv = newUV;
        mesh.triangles = newTriangles;
    }
}

变量

构造函数

公共函数

静态函数

继承的成员