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using UnityEngine;public class Ball : MonoBehaviour{ private Rigidbody rigid; private Vector3 lastDir; public float speed = 30; private void Awake() { rigid = GetComponent(); rigid.velocity = new Vector3(1, 0, 1) * speed; } private void LateUpdate() { lastDir = rigid.velocity; } private void OnCollisionEnter(Collision other) { if (other.gameObject.tag == "Wall") { Vector3 reflexAngle = Vector3.Reflect(lastDir, other.contacts[0].normal); rigid.velocity = reflexAngle.normalized * lastDir.magnitude; } }}
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