How to make a ball rolling while following a curve path made with ways point?

Question

I've already know how to create ways point from this youtube: link video I want to make game like Rotator in Google Play Store (see this video). That ball can roll along curve path and while keep rotating. Meanwhile in the youtube video, I tried it to change the object to sphere. It seems that it cannot rotate to its forward direction. I tried to add this code below, but it doesn't follow the curve path I make. Anyone can help me?

 RigidBody().AddForce(Vector3.forward * moveSpeed, ForceMode.Impulse); //move forward automatically

Answer 1

Hi. This is just something I threw together really quick, but it should give you an idea of how to do it.

 using UnityEngine;
 
     // Put on the ball object and add some waypoints
     public class BallMover : MonoBehaviour
     {
         [SerializeField] GameObject[] points;
         [SerializeField] Rigidbody body;
         [SerializeField] float force = 5f;
 
         int pointIndex = -1;
         bool movementComplete;
         Vector3 heading;
 
 
         void Start()
         {
             GetNextPoint();    
         }
 
 
         void FixedUpdate()
         {
             MoveBall();
         }
 
 
         void MoveBall()
         {
             if (movementComplete == false)
             {
                 if (Vector3.Distance(points[pointIndex].transform.position, transform.position) <= 0.2f)
                 {
                     GetNextPoint();
                 }
                 else
                 {
                     body.velocity = heading * force;
                 }
             }
         }
 
 
         void GetNextPoint()
         {
             pointIndex++;
 
             if (pointIndex < points.Length)
             {
                 heading = (points[pointIndex].transform.position - transform.position).normalized;
             }
             else
             {
                 movementComplete = true;
 
                 // Stop all the things
                 body.velocity = body.angularVelocity = Vector3.zero;
             }
         }
     }

I use rigidbody.velocity in this type of situation because I want to have total control over the speed of the ball. If we use addForce(), then the speed is additive and I would need a way to keep that under control.

Just add to your ball gameObject, then place some empty gameObject waypoints. Hope it helps!

How to make a ball rolling while following a curve path made with ways point?

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