Unity中使用Mesh绘制圆环/空心圆,可调节圆环角度与位置

public class MeshDrawRing : MonoBehaviour
{
   
    public Material mat;
    public Transform go;
    public float radius = 6;            //外半径 
    public float innerRadius = 3;       //内半径
    public int segments = 60;           //分割数 
    public int angleDegree = 360;       //扇形或扇面的角度

    private void Start()
    {
   
        transform.eulerAngles = Vector3.left * 90;
    }

    private void Update()
    {
   
        DrawRing(radius, innerRadius, segments, angleDegree, go.position);
    }

    /// <summary>
    /// 画圆环
    /// </summary>
    /// <param name="radius">圆半径</param>
    /// <param name="innerRadius">内圆半径</param>