unity在game窗口生成可视化圆锥形视野范围，请给出具体代码实现

以下是一种实现可视化圆锥形视野范围的Unity代码：

using UnityEngine;

public class ConeOfVision : MonoBehaviour
{
    public float viewAngle = 90f;
    public float viewDistance = 10f;
    public LayerMask targetMask;
    public LayerMask obstacleMask;

    private void Update()
    {
        Collider[] targetsInViewRadius = Physics.OverlapSphere(transform.position, viewDistance, targetMask);

        for (int i = 0; i < targetsInViewRadius.Length; i++)
        {
            Transform target = targetsInViewRadius[i].transform;
            Vector3 dirToTarget = (target.position - transform.position).normalized;

            if (Vector3.Angle(transform.forward, dirToTarget) < viewAngle / 2)
            {
                float dstToTarget = Vector3.Distance(transform.position, target.position);

                if (!Physics.Raycast(transform.position, dirToTarget, dstToTarget, obstacleMask))
                {
                    Debug.DrawLine(transform.position, target.position, Color.green);
                }
            }
        }

        DrawFieldOfView();
    }

    private void DrawFieldOfView()
    {
        int rayCount = 50;
        float angle = transform.eulerAngles.y - viewAngle / 2;

        for (int i = 0; i < rayCount; i++)
        {
            Vector3 dir = DirFromAngle(angle + viewAngle / rayCount * i);
            Debug.DrawLine(transform.position, transform.position + dir * viewDistance, Color.red);
        }
    }

    private Vector3 DirFromAngle(float angleInDegrees)
    {
        float angleInRadians = angleInDegrees * Mathf.Deg2Rad;
        return new Vector3(Mathf.Sin(angleInRadians), 0, Mathf.Cos(angleInRadians));
    }
}

这个脚本会在每一帧检测视野范围内的目标，并用绿色的线条连接玩家和目标。同时，它还会在玩家周围画出一个红色的圆锥形视野范围。