PathPoints With Colliders

using UnityEngine;
using System.Collections;
using System;

public class PathPoint : MonoBehaviour {
    int radius = 10;
    public Func<Collider,GameObject, int> TriggerEnterAction;
    public Func<Collider, int> TriggerExitAction;
    public GameObject ObjectToDetect;
	void OnDrawGizmos(){
		Gizmos.color=Color.blue;
		Gizmos.DrawWireSphere(transform.position,radius);
	}
    void Start()
    {
        var collider = gameObject.AddComponent<SphereCollider>();
        collider.isTrigger = true;
        collider.radius = radius;
    }
    void OnTriggerEnter(Collider other)
    {
        if (other == ObjectToDetect.collider)
        {
            TriggerEnterAction(other,gameObject);
        }
    }

    void OnTriggerExit(Collider other)
    {
        TriggerExitAction(other);
    }
}