Tanks Unity Tutorial

YouTube地址：https://www.youtube.com/watch?v=_In3KT97aTw

实现射击的效果：

using UnityEngine;using UnityEngine.UI;public class TankShooting : MonoBehaviour{    public int m_PlayerNumber = 1;           public Rigidbody m_Shell;                public Transform m_FireTransform;        public Slider m_AimSlider;               public AudioSource m_ShootingAudio;      public AudioClip m_ChargingClip;         public AudioClip m_FireClip;             public float m_MinLaunchForce = 15f;     public float m_MaxLaunchForce = 30f;     public float m_MaxChargeTime = 0.75f;        private string m_FireButton;             private float m_CurrentLaunchForce;      private float m_ChargeSpeed;             private bool m_Fired;                    private void OnEnable()    {        m_CurrentLaunchForce = m_MinLaunchForce;        m_AimSlider.value = m_MinLaunchForce;    }    private void Start()    {        m_FireButton = "Fire" + m_PlayerNumber;        m_ChargeSpeed = (m_MaxLaunchForce - m_MinLaunchForce) / m_MaxChargeTime;    }        private void Update()    {        // Track the current state of the fire button and make decisions based on the current launch force.        m_AimSlider.value = m_CurrentLaunchForce;        if (m_CurrentLaunchForce >= m_MaxLaunchForce && !m_Fired) {            m_CurrentLaunchForce = m_MaxLaunchForce;            Fire ();        } else if (Input.GetButtonDown (m_FireButton)) {            m_Fired = false;            m_CurrentLaunchForce = m_MinLaunchForce;            m_ShootingAudio.clip = m_ChargingClip;            m_ShootingAudio.Play ();        } else if (Input.GetButton (m_FireButton) && !m_Fired) {            m_CurrentLaunchForce += m_ChargeSpeed * Time.deltaTime;            m_AimSlider.value = m_CurrentLaunchForce;        } else if (Input.GetButtonUp (m_FireButton)&& !m_Fired) {            Fire ();        }    }    private void Fire()    {        // Set the fired flag so only Fire is only called once.        m_Fired = true;        // Create an instance of the shell and store a reference to it's rigidbody.        Rigidbody shellInstance =            Instantiate (m_Shell, m_FireTransform.position, m_FireTransform.rotation) as Rigidbody;        // Set the shell's velocity to the launch force in the fire position's forward direction.        shellInstance.velocity = m_CurrentLaunchForce * m_FireTransform.forward; ;        // Change the clip to the firing clip and play it.        m_ShootingAudio.clip = m_FireClip;        m_ShootingAudio.Play ();        // Reset the launch force.  This is a precaution in case of missing button events.        m_CurrentLaunchForce = m_MinLaunchForce;    }}