VRCycling/Assets/Scripts/Roads/StraightRoadExtras.cs

using System;
using Pools;
using Routes;
using UnityEngine;

namespace Roads
{
   [RequireComponent(typeof(BoxCollider))]
   public class StraightRoadExtras : MonoBehaviour, IRoad
   {
      public GameObject arcPrefab;
      private GameObject arc;

      private bool hasArc;
      public TriggerState ArcState { get; private set; } = TriggerState.Outside;
      
      public float SlopeDeg { get; private set; }

      public float MinY { get; private set; }

      private void Start()
      {
         SlopeDeg = transform.localRotation.eulerAngles.z;
         MinY = GetComponent<BoxCollider>().bounds.center.y;
      }

      public void ShowArc()
      {
         arc = Instantiate(arcPrefab, transform);
         hasArc = arc != null;
      }

      private void OnTriggerEnter(Collider other)
      { 
         if (hasArc && other.CompareTag("bike"))
         {
            ArcState = TriggerState.Inside;
         }
      }

      private void OnTriggerExit(Collider other)
      {
         if (hasArc && other.CompareTag("bike"))
         {
            Destroy(arc);
            ArcState = TriggerState.Outside;
         }
      }
   }
}