update

Assets/FPS/Scripts/Gameplay/Pickup.cs

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+using Unity.FPS.Game;
+using UnityEngine;
+
+namespace Unity.FPS.Gameplay
+{
+    [RequireComponent(typeof(Rigidbody), typeof(Collider))]
+    public class Pickup : MonoBehaviour
+    {
+        [Tooltip("Frequency at which the item will move up and down")]
+        public float VerticalBobFrequency = 1f;
+
+        [Tooltip("Distance the item will move up and down")]
+        public float BobbingAmount = 1f;
+
+        [Tooltip("Rotation angle per second")] public float RotatingSpeed = 360f;
+
+        [Tooltip("Sound played on pickup")] public AudioClip PickupSfx;
+        [Tooltip("VFX spawned on pickup")] public GameObject PickupVfxPrefab;
+
+        public Rigidbody PickupRigidbody { get; private set; }
+
+        Collider m_Collider;
+        Vector3 m_StartPosition;
+        bool m_HasPlayedFeedback;
+
+        protected virtual void Start()
+        {
+            PickupRigidbody = GetComponent<Rigidbody>();
+            DebugUtility.HandleErrorIfNullGetComponent<Rigidbody, Pickup>(PickupRigidbody, this, gameObject);
+            m_Collider = GetComponent<Collider>();
+            DebugUtility.HandleErrorIfNullGetComponent<Collider, Pickup>(m_Collider, this, gameObject);
+
+            // ensure the physics setup is a kinematic rigidbody trigger
+            PickupRigidbody.isKinematic = true;
+            m_Collider.isTrigger = true;
+
+            // Remember start position for animation
+            m_StartPosition = transform.position;
+        }
+
+        void Update()
+        {
+            // Handle bobbing
+            float bobbingAnimationPhase = ((Mathf.Sin(Time.time * VerticalBobFrequency) * 0.5f) + 0.5f) * BobbingAmount;
+            transform.position = m_StartPosition + Vector3.up * bobbingAnimationPhase;
+
+            // Handle rotating
+            transform.Rotate(Vector3.up, RotatingSpeed * Time.deltaTime, Space.Self);
+        }
+
+        void OnTriggerEnter(Collider other)
+        {
+            PlayerCharacterController pickingPlayer = other.GetComponent<PlayerCharacterController>();
+
+            if (pickingPlayer != null)
+            {
+                OnPicked(pickingPlayer);
+
+                PickupEvent evt = Events.PickupEvent;
+                evt.Pickup = gameObject;
+                EventManager.Broadcast(evt);
+            }
+        }
+
+        protected virtual void OnPicked(PlayerCharacterController playerController)
+        {
+            PlayPickupFeedback();
+        }
+
+        public void PlayPickupFeedback()
+        {
+            if (m_HasPlayedFeedback)
+                return;
+
+            if (PickupSfx)
+            {
+                AudioUtility.CreateSFX(PickupSfx, transform.position, AudioUtility.AudioGroups.Pickup, 0f);
+            }
+
+            if (PickupVfxPrefab)
+            {
+                var pickupVfxInstance = Instantiate(PickupVfxPrefab, transform.position, Quaternion.identity);
+            }
+
+            m_HasPlayedFeedback = true;
+        }
+    }
+}