public class FanMeshGenerator : MonoBehaviour { public float radius = 1f; public float angle = 90f; public int segments = 24; private MeshFilter meshFilter; void Start() { meshFilter = GetComponent<MeshFilter>(); GenerateMesh(); } void GenerateMesh() { Mesh mesh = new Mesh(); Vector3[] vertices = new Vector3[segments + 2]; int[] triangles = new int[segments * 3]; vertices[0] = Vector3.zero; float angleStep = angle / segments; for (int i = 1; i <= segments + 1; i++) { float a = angleStep * (i - 1) * Mathf.Deg2Rad; vertices[i] = new Vector3(Mathf.Cos(a) * radius, 0f, Mathf.Sin(a) * radius); } for (int i = 0; i < segments; i++) { triangles[i * 3] = 0; triangles[i * 3 + 1] = i + 1; triangles[i * 3 + 2] = i + 2; } mesh.vertices = vertices; mesh.triangles = triangles; meshFilter.mesh = mesh; } }加注释

好的，以下是带注释的代码：

public class FanMeshGenerator : MonoBehaviour
{
    public float radius = 1f; // 扇形的半径
    public float angle = 90f; // 扇形的角度（以度为单位）
    public int segments = 24; // 扇形的分段数

    private MeshFilter meshFilter;

    void Start()
    {
        meshFilter = GetComponent<MeshFilter>(); // 获取 MeshFilter 组件
        GenerateMesh(); // 生成扇形网格
    }

    void GenerateMesh()
    {
        Mesh mesh = new Mesh(); // 创建一个新的网格对象

        Vector3[] vertices = new Vector3[segments + 2]; // 存储扇形的顶点数组，数组长度为分段数加 2
        int[] triangles = new int[segments * 3]; // 存储扇形的三角形索引数组，数组长度为分段数乘以 3

        vertices[0] = Vector3.zero; // 第一个顶点为圆心（0,0,0）

        float angleStep = angle / segments; // 计算每个分段的角度

        for (int i = 1; i <= segments + 1; i++) // 构建扇形的顶点
        {
            float a = angleStep * (i - 1) * Mathf.Deg2Rad; // 计算当前顶点的角度
            vertices[i] = new Vector3(Mathf.Cos(a) * radius, 0f, Mathf.Sin(a) * radius); // 根据角度和半径计算顶点的坐标
        }

        for (int i = 0; i < segments; i++) // 构建扇形的三角形索引
        {
            triangles[i * 3] = 0; // 第一个顶点为圆心
            triangles[i * 3 + 1] = i + 1; // 当前分段的第一个顶点
            triangles[i * 3 + 2] = i + 2; // 下一个分段的第一个顶点
        }

        mesh.vertices = vertices; // 设置网格的顶点数组
        mesh.triangles = triangles; // 设置网格的三角形索引数组

        meshFilter.mesh = mesh; // 将生成的网格赋给 MeshFilter 组件
    }
}