Prefab to automatically follow a waypoint path?

Questions & Answers
1

I have a car game object with scripts that move it along a path. It works great exactly how I want it to work.

I then turn it into a prefab to spawn at a certain point on a road. I made a game controller to instantiate the prefab. It works and the car spawns where I want it to…but doesn’t move along the path. It just sits there.

When I first wrote the scripts for the game object I made it so that I had to manually drag the waypoint path object to a public variable for it to follow. And I assumed that when I made the car into a prefab it kept that variable when it spawns. It doesn’t.

So my question is how do I get my spawned car to automatically find the path to follow and actually follow?

Here is my initial code for moving the car on the path:

using UnityEngine;
using System.Collections;

public class moveOnPath : MonoBehaviour
{

    public waypointPath PathToFollow;

    public int CurrentWayPointID;
    public float speed;
    public float reachDistance;
    public float rotationSpeed;
    public string pathName;

    Vector3 last_position;
    Vector3 current_position;


 

    void Start()
    {
        PathToFollow = GameObject.Find(pathName).GetComponent<waypointPath>();
        last_position = transform.position;
    }


    void Update()
    {
        float distance = Vector3.Distance(PathToFollow.nodes[CurrentWayPointID].position, transform.position);
        transform.position = Vector3.MoveTowards(transform.position, PathToFollow.nodes[CurrentWayPointID].position, Time.deltaTime * speed);

        var rotation = Quaternion.LookRotation(PathToFollow.nodes[CurrentWayPointID].position - transform.position);
        transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Time.deltaTime * rotationSpeed);

        if (distance <= reachDistance)
        {
            CurrentWayPointID++;
        }

        if (CurrentWayPointID >= PathToFollow.nodes.Count)
        {
            CurrentWayPointID = 0;
        }
    }
}

And here is the code for the path:

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Path : MonoBehaviour {

    public Color lineColor;

    public List<Transform> nodes = new List<Transform>();


   
	
	void OnDrawGizmosSelected()
    {
        Gizmos.color = lineColor;

        Transform[] pathTransforms = GetComponentsInChildren<Transform>();
        nodes = new List<Transform>();

        for(int i = 0; i < pathTransforms.Length; i++)
        {
            if(pathTransforms *!= transform)*

{
nodes.Add(pathTransforms*);*
}
}

for(int i = 0; i < nodes.Count; i++)
{
Vector3 currentNode = nodes*.position;*
Vector3 previousNode = Vector3.zero;

if (i > 0)
{
previousNode = nodes[i - 1].position;
}

else if(i == 0 && nodes.Count > 1)
{
previousNode = nodes[nodes.Count - 1].position;
}

Gizmos.DrawLine(previousNode, currentNode);
Gizmos.DrawWireSphere(currentNode, 0.3f);
}

}

}

2

try this one if it is 2d

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EnemyWaypoints : MonoBehaviour
{

public List<Transform> waypoints;
private Transform currentWaypoint;

public float speed = 5f;

private float closeEnouth = 0.5f;
int point = 0;


void Start()
{

    currentWaypoint = waypoints[point];
}

// Update is called once per frame
void Update()
{

    Quaternion rotation = Quaternion.LookRotation(waypoints[point].position - transform.position, transform.TransformDirection(Vector3.forward));
    transform.rotation = new Quaternion(0, 0, rotation.z, rotation.w);

    float dist = Vector3.Distance(waypoints[point].position, transform.position);
    transform.position = Vector3.MoveTowards(transform.position, waypoints[point].position, Time.deltaTime * speed);

    if (Vector3.Distance(this.transform.position, waypoints[point].position) < closeEnouth)
    {
        if (point + 1 < waypoints.Count)
            point++;
       

    }
}

}