Collision Events

using UnityEngine;

public class CollisionSounds : MonoBehaviour
{
  public AudioClip softHit, hardHit;
  public ParticleSystem impactFX;
  public float hardHitThreshold = 5f;

  void OnCollisionEnter(Collision collision)
  {
      float speed = collision.relativeVelocity.magnitude;

      // Chọn âm thanh dựa vào tốc độ va chạm
      AudioClip clip = speed > hardHitThreshold ? hardHit : softHit;
      AudioSource.PlayClipAtPoint(clip, collision.GetContact(0).point);

      // Spawn hiệu ứng tại điểm va chạm đầu tiên
      if (impactFX != null)
      {
          ContactPoint contact = collision.GetContact(0);
          Instantiate(impactFX, contact.point,
              Quaternion.LookRotation(contact.normal));
      }
  }
}

using UnityEngine;

public class BreakableObject : MonoBehaviour
{
  public GameObject[] fragmentPrefabs; // Các mảnh vỡ
  public float breakForceThreshold = 8f;
  public float fragmentExplosionForce = 200f;
  bool broken = false;

  void OnCollisionEnter(Collision collision)
  {
      if (broken) return;
      if (collision.relativeVelocity.magnitude < breakForceThreshold) return;

      broken = true;
      ContactPoint contact = collision.GetContact(0);

      // Spawn và phân tán mảnh vỡ
      foreach (GameObject frag in fragmentPrefabs)
      {
          GameObject piece = Instantiate(frag, transform.position,
              Random.rotation);

          Rigidbody rb = piece.GetComponent<Rigidbody>();
          if (rb != null)
              rb.AddExplosionForce(fragmentExplosionForce,
                  contact.point, 1f);
      }

      Destroy(gameObject);
  }
}