Error adding sound script

Questions & Answers
1

I’m working on this project, I got two errors while trying to add a sound to my shotgun:
“Removing Assets/Resources/railgun.wav because the asset does not exist”
and
“Assets/Scripts/Armory/WeaponShotgun.cs(45,46): error CS0120: An object reference is required to access non-static member `UnityEngine.GameObject.AddComponent(string)'”

I attached an edited version of the script, any help will be appreciated as I’m new to Unity
namespace Thot.GameAI
{
using System.Collections.Generic;

	using UnityEngine;
	[RequireComponent(typeof(AudioSource))]
	
	public sealed class WeaponShotgun : Weapon
    {
		//here I defined the variable for the shotgun sound
		public AudioSource shotgun;//
		public WeaponShotgun(Agent agent)
            : base(
                WeaponTypes.Shotgun, 
                Parameters.Instance.ShotgunDefaultRounds, 
                Parameters.Instance.ShotgunMaximumRoundsCarried, 
                Parameters.Instance.ShotgunFiringFrequency, 
                Parameters.Instance.ShotgunIdealRange, 
                Parameters.Instance.PelletMaximumSpeed, 
                agent)
        {
            Targets = new List<Vector3>();
            BallsInShell = Parameters.Instance.ShotgunBallsInShell;
            Spread = Parameters.Instance.ShotgunSpread;

            // setup the fuzzy module
            InitializeFuzzyModule();
			//shotgun = (AudioSource)GameObject.AddComponent("AudioSource");
        }
		//I added the initializer for the AudioSource here
		public AudioSource AudioSource { get; set; }
//		AudioSource = gameObject.GetComponent<AudioSource>();

		public int BallsInShell { get; private set; }
		
		public float Spread { get; private set; }
		
		public List<Vector3> Targets { get; private set; }
		public void Update(){
			//AudioSource = gameObject.AddComponent<AudioSource>();
		}
		//I added a start method
		public void Start(){
			//shotgun = (AudioSource)GameObject.GetComponent("AudioSource");
			shotgun = GameObject.AddComponent<AudioSource>();
			AudioClip myClip = (AudioClip)Resources.Load("SFX/shotgun");
			shotgun.clip = myClip;
		}

		public override void ShootAt(Vector3 targetPosition)

		{
			if (RoundsRemaining <= 0 || !IsReadyForNextShot())
            {
                return;
            }
			
			Targets.Clear();
			
			// a shotgun cartridge contains lots of tiny metal balls called
            // pellets. Therefore, every time the shotgun is discharged we 
            // have to calculate the spread of the pellets and add one for 
            // each trajectory
            for (int b = 0; b < BallsInShell; ++b)
            {
                // determine deviation from target using a bell curve type distribution
                float deviation =
                    Random.Range(0, Spread) +
                    Random.Range(0, Spread) - Spread;

                Vector3 adjustedTarget = targetPosition;
				
                // rotate the target vector by the deviation
                VectorExtensions.RotateAroundPivot(
                    Agent.Kinematic.Position, 
                    Quaternion.Euler(0, deviation, 0),
					ref adjustedTarget);

                // add a pellet to the game world
                AddPellet(
                    Agent, 
                    adjustedTarget);

                // temp debugging code
                Targets.Add(adjustedTarget);
            }
			
			DecrementRounds();
			
			UpdateTimeNextAvailable();
			
			AddSoundTrigger(Agent, Parameters.Instance.ShotgunSoundRange);
		}
		
		public override float GetDesirability(float distanceToTarget)
        {
			if (RoundsRemaining == 0)
            {
                LastDesirabilityScore = 0;
            }
            else
            {
				// fuzzify distance and amount of ammo
                FuzzyModule.Fuzzify("distanceToTarget", distanceToTarget);
                FuzzyModule.Fuzzify("ammoStatus", RoundsRemaining);
                LastDesirabilityScore =
                    FuzzyModule.DeFuzzify("desirability", FuzzyModule.DefuzzifyMethod.MaxAv);
			}

            return LastDesirabilityScore;
        }
		
		protected override void InitializeFuzzyModule()
        {
			FzSet targetClose;
			FzSet targetMedium;
			FzSet targetFar;

            InitializeDistanceToTarget(out targetClose, out targetMedium, out targetFar);
			
			FzSet undesirable;
			FzSet desirable;
			FzSet veryDesirable;
				
			InitializeDesirability(out undesirable, out desirable, out veryDesirable);

            FuzzyVariable ammoStatus = FuzzyModule.CreateFlv("ammoStatus");
            FzSet ammoLoads = ammoStatus.AddRightShoulderSet("ammoLoads", 15, 20, 30);
            FzSet ammoOkay = ammoStatus.AddTriangularSet("ammoOkay", 0, 10, 20);
            FzSet ammoLow = ammoStatus.AddTriangularSet("ammoLow", 0, 0, 10);

            FuzzyModule.AddRule(new FzAnd(targetClose, ammoLoads), veryDesirable);
            FuzzyModule.AddRule(new FzAnd(targetClose, ammoOkay), veryDesirable);
            FuzzyModule.AddRule(new FzAnd(targetClose, ammoLow), veryDesirable);

            FuzzyModule.AddRule(new FzAnd(targetMedium, ammoLoads), veryDesirable);
            FuzzyModule.AddRule(new FzAnd(targetMedium, ammoOkay), desirable);
            FuzzyModule.AddRule(new FzAnd(targetMedium, ammoLow), undesirable);

            FuzzyModule.AddRule(new FzAnd(targetFar, ammoLoads), desirable);
            FuzzyModule.AddRule(new FzAnd(targetFar, ammoOkay), undesirable);
            FuzzyModule.AddRule(new FzAnd(targetFar, ammoLow), undesirable);
		}
		
		private void AddPellet(Agent shooter, Vector3 target)
        {
			if (activeProjectileCount < Parameters.Instance.MaximumActivePellets)
			{
				OnProjectileAdded();
				
				GameObject pelletObject = GameObject.Instantiate(GameManager.Instance.pelletPrefab) as GameObject;
				pelletObject.rigidbody.mass = Parameters.Instance.PelletMass;
				ProjectilePellet pellet = pelletObject.AddComponent<ProjectilePellet>();
				pellet.Spawn(this, shooter, target);
				//if the pallet comes out, that means a gunshot has been made
				//we play a shotgun sound after the pallet has been ejected from the shotgun
				//AudioSource.PlayOneShot(shotgun);
				shotgun.Play ();

			}
        }
	}
}
2

‘GameObject’ with upper case ‘G’ is the class. ‘gameObject’ is this instance of that class. So you can do:

shotgun = (AudioSource)gameObject.AddComponent("AudioSource");

But I recommend using the generic rather than the string version of AddComponent() as you’ve done on line 143:

shotgun = gameObject.AddComponent<AudioSource>();