Unity实现枪械射击后坐力效果

Unity实现枪械射击后坐力效果

引用

CSDN

1.

https://blog.csdn.net/pq8888168/article/details/103686706

最近要在VR里面制作一个射击的功能，枪是外接设备也不知道有没有后坐力，模拟一个先以防万一。这个是PC测试的，模拟的不是很真实，用摄像机的抖动造成后坐力的感觉，但是改改还是够用。

枪械发射脚本

using UnityEngine;

public class GunRecoil : MonoBehaviour
{
    private GameObject bullet; // 子弹
    private Vector3 FrontStar; // 准星
    private CameraController cam; // 摄像机控制脚本
    private float shootRate = 0.15f; // 射击频率
    private float shootTimer; // 射击计时

    private void Start()
    {
        bullet = transform.Find("Bullet").gameObject;
        cam = Camera.main.GetComponent<CameraController>();
        LookAtStar();
    }

    private void Update()
    {
        if (Input.GetButton("Fire1"))
        {
            Fire();
        }
        else
        {
            if (Input.GetAxis("Mouse X") == 0 && Input.GetAxis("Mouse Y") == 0)
                cam.Recover();
        }
    }

    /// <summary>
    /// 射击，射击频率，后坐力模拟
    /// </summary>
    private void Fire()
    {
        shootTimer += Time.deltaTime;
        if (shootTimer >= shootRate)
        {
            GameObject go = Instantiate(bullet, bullet.transform.position, Quaternion.identity);
            go.SetActive(true);
            go.GetComponent<Rigidbody>().velocity = transform.forward * 20000;
            Destroy(go, 4f);
            shootTimer = 0;
            cam.SimulateRecoil();
        }
    }

    /// <summary>
    /// 枪始终看向准星
    /// </summary>
    private void LookAtStar()
    {
        Ray ray = Camera.main.ScreenPointToRay(new Vector3(Screen.width / 2, Screen.height / 2));
        RaycastHit hit;
        if (Physics.Raycast(ray, out hit))
        {
            FrontStar = hit.point;
        }
        else
        {
            //Debug.DrawRay(Camera.main.transform.position,Camera.main.transform.forward * 1000,Color.red);
            FrontStar = Camera.main.transform.forward * 1000;
        }
        transform.LookAt(FrontStar);
    }
}

摄像机控制脚本

using UnityEngine;
using UnityEngine.EventSystems;

public class CameraController : MonoBehaviour
{
    public float RotateAngle;

    public void CameraRotate()
    {
        float x_axis = Input.GetAxis("Mouse X");
        float y_axis = Input.GetAxis("Mouse Y");
        if (Input.GetMouseButton(1))
        {
            if (Mathf.Abs(x_axis) > Mathf.Abs(y_axis))
            {
                transform.Rotate(Vector3.up, RotateAngle * x_axis * Time.deltaTime);
            }
            if (Mathf.Abs(y_axis) > Mathf.Abs(x_axis))
            {
                if (transform.eulerAngles.x > -80 && transform.eulerAngles.x < 360)
                {
                    transform.Rotate(Vector3.left, RotateAngle * y_axis * Time.deltaTime);
                }
                else
                {
                    return;
                }
            }

            transform.eulerAngles = new Vector3(transform.eulerAngles.x, transform.eulerAngles.y, 0);
            if (!Input.GetButton("Fire1")) // 如果不是在射击时移动镜头就设置最终旋转等于移动的旋转
                lastQ = transform.rotation; // 避免在射击时压枪射击完后镜头不恢复到射击前的状态
        }
    }

    public float Max_X_Recoil; // X轴最大旋转偏移
    public float Max_Y_Recoil; // Y轴最大旋转便宜
    private float x_Range; // X轴射击时的旋转度
    private float y_Range; // Y轴射击时的旋转度

    public void SimulateRecoil()
    {
        x_Range = Random.Range(0.1f, Max_X_Recoil);
        y_Range = Random.Range(0.1f, Max_Y_Recoil);
        //transform.eulerAngles += transform.rotation * transform.up*x_Range+transform.rotation*transform.right * y_Range;//使用右乘会导致左右旋转后出现偏差
        transform.eulerAngles = new Vector3(transform.eulerAngles.x - x_Range, transform.eulerAngles.y + y_Range, 0); // 射击时的旋转
    }

    private Quaternion lastQ; // 摄像机射击之前的旋转

    public void Recover()
    {
        transform.rotation = Quaternion.Lerp(transform.rotation, lastQ, 5f * Time.deltaTime); // 恢复之前的旋转
    }
}

效果展示