PlayerAttack

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using EnemyInfo;
using Shell;

namespace PlayerInfo
{
    public class PlayerAttack : MonoBehaviour
    {
        public int PlayerNumber = 1;
        public Rigidbody Shell;
        public Transform FireTransform;
        public Slider AimSlider;
        public AudioSource ShootingAudio;
        public AudioClip ChargingClip;
        public AudioClip FireClip;
        public float MinForce = 15f;
        public float MaxForce = 30f;
        public float MaxCharge = 0.75f;

        string FireButton;
        float CurrentForce;
        float ChargeSpeed;
        bool Fired;

        void OnEnable ()
        {
            CurrentForce = MinForce;
            AimSlider.value = MinForce;
        }

        void Start ()
        {
            FireButton = "Fire";

            ChargeSpeed = (MaxForce - MinForce) / MaxCharge;
        }

        void Update ()
        {
            AimSlider.value = MinForce;

            if (CurrentForce >= MaxForce && !Fired)
            {
                CurrentForce = MaxForce;
                Fire ();
            }
            else if (Input.GetButtonDown (FireButton))
            {
                Fired = false;
                CurrentForce = MinForce;

                ShootingAudio.clip = ChargingClip;
                ShootingAudio.Play ();
            }
            else if (Input.GetButton (FireButton) && !Fired)
            {
                CurrentForce += ChargeSpeed * Time.deltaTime;

                AimSlider.value = CurrentForce;
            }
            else if (Input.GetButtonUp (FireButton) && !Fired)
            {
                Fire ();
            }
        }

        void Fire ()
        {
            Fired = true;

            Rigidbody shellInstance = Instantiate (Shell, FireTransform.position, FireTransform.rotation) as Rigidbody;

            shellInstance.velocity = CurrentForce * FireTransform.forward;

            ShootingAudio.clip = FireClip;
            ShootingAudio.Play ();

            CurrentForce = MinForce;
        }
    }
}