Moving sphere gameObject between 3 points in a loop

Question

I am defining three gameObject points where a sphere gameObject should travel from one position to another in a loop, such that 1-2-3-1-2-3....(as in a triangle). I am able to achieve the movement with Vector3.MoveTowards() function but it only takes in 2 points. Is there a way to achieve the same with multiple points? (atleast 3 or more)

public class SlideBetweenPoints : MonoBehaviour
{
    public Transform pointA, pointB, pointC;
    public float speed;
 
     void Update ()
     {
        float step =  speed * Time.deltaTime; 
        transform.position = Vector3.MoveTowards(pointA.position , pointB.position , step);
 
     }
}

Answer 1

Yes simply move towards one point and when you reached it go to the next one.

Note that currently you are always starting again from pointA . In order to continuously move towards a target position you have to rather use

transform.position = Vector3.MoveTowards(transform.position, targetPosition, step);

I would rather use a more general List like

public class SlideBetweenPoints : MonoBehaviour
{
    public List<Transform> points;
    public float speed;
 
    private int index;

     void Update ()
     { 
         transform.position = Vector3.MoveTowards(transform.position, points[index].position, speed * Time.deltaTime);
 
         if(transform.position == points[index].position)
         {
             // increase index with wrap around
             index = (index + 1) % points.Count;
         }
     }
}

Where transform.position == points[index] uses a precision of 1e-5 for equality. If you really need it you could also check for exact matching positions:

 if(Mathf.Approximately(0, (transform.position- points[index].position).sqrMagnitude))
 {
     index = (index + 1) % points.Count;
 }