OldBlueWater/BlueWater/Assets/02.Scripts/Weapon/ObjectWeapon.cs

using System.Collections;
using UnityEngine;

// ReSharper disable once CheckNamespace
namespace BlueWaterProject
{
    public class ObjectWeapon : MonoBehaviour
    {
        [SerializeField] private LayerMask targetLayer;
        [SerializeField] private float power;
        [SerializeField] private float autoDestroyTime = 3f;

        private Rigidbody rb;
        private SphereCollider sphereCollider;
        private WaitForSeconds waitForSeconds;

        private void Awake()
        {
            rb = GetComponent<Rigidbody>();
            sphereCollider = GetComponent<SphereCollider>();
            waitForSeconds = new WaitForSeconds(autoDestroyTime);
        }
        
        private void OnDestroy()
        {
            StopAllCoroutines();
        }

        private void Start()
        {
            StartCoroutine(nameof(AutoDestroy));
        }
		
        private void FixedUpdate()
        {	
			// if (rb.velocity.magnitude != 0)
			// {
			//     transform.rotation = Quaternion.LookRotation(rb.velocity); // Sets rotation to look at direction of movement
			// }

            var direction = rb.velocity; // Gets the direction of the projectile, used for collision detection
            if (rb.useGravity)
                direction += Physics.gravity * Time.deltaTime; // Accounts for gravity if enabled
            direction = direction.normalized;

            var detectionDistance = rb.velocity.magnitude * Time.deltaTime; // Distance of collision detection for this frame

            if (Physics.SphereCast(transform.position, sphereCollider.radius, direction, out var hit, detectionDistance, targetLayer)) // Checks if collision will happen
            {
                transform.position = hit.point + (hit.normal); // Move projectile to point of collision
                
                Destroy(gameObject); // Removes the projectile

                hit.transform.GetComponent<IDamageable>()?.TakeDamage(power);
            }
        }
        
        private IEnumerator AutoDestroy()
        {
            yield return waitForSeconds;

            if (gameObject != null)
            {
                Destroy(gameObject);
            }
        }

        public void SetPower(float value) => power = value;
    }
}