Procedural Mesh

模型基本概念

顶点

三角面

使用代码创建模型

using UnityEngine;

public class ProceduralMesh : MonoBehaviour
{
    private Vector3[] _verticals;

    private int[] _triangles;

    private Mesh _mesh;

    // Start is called before the first frame update
    void Awake()
    {
        //获取相应组件
        var meshFilter = gameObject.GetComponent<MeshFilter>();
        var meshRenderer = gameObject.GetComponent<MeshRenderer>();
        _mesh = meshFilter.mesh;
    }

    private void Start()
    {
        MakeMeshData();
        CreateMesh();
    }

    private void MakeMeshData()
    {
        //顶点数据
        _verticals = new[]
        {
            new Vector3(0, 0, 0),
            new Vector3(0, 1, 0),
            new Vector3(1, 0, 0),
            new Vector3(1, 1, 0),
        };

        //三角面信息
        _triangles = new[] {0, 1, 2, 3, 2, 1};
    }

    //创建Mesh
    private void CreateMesh()
    {
        _mesh.Clear();
        _mesh.vertices = _verticals;
        _mesh.triangles = _triangles;
        _mesh.RecalculateNormals();
    }
}

顶点共用

三角面可以共用顶点，但需要注意的是，使用共用顶点组成相邻面时，如果相邻面不在同一平面上，那么会平滑过渡。如果不公用点，则不会由此效果。