【UnityFPS射击游戏】(1)制作FPS角色控制器方法①

使用Rigbody&Capsule Collider制作FPS角色控制器

1.1鼠标控制视角在X轴，Y轴旋转

通过鼠标移动视角的代码，此代码放在相机身上

新建【FPMouseLook】脚本

    private Transform cameraTransform;   
    private Vector3 cameraRotation; //保存每一帧存储下的坐标信息
    public float mouseSesitivity;//修改鼠标灵敏度
    public Vector2 maxMinAngle;//限制垂直视角区域
    void Start()
    {
        cameraTransform = transform;
    }
    void Update()
    {
        var mouseX = Input.GetAxis("Mouse X");//将鼠标输入的X值赋予mouseX
        var mouseY = Input.GetAxis("Mouse Y"); //将鼠标输入的Y值赋予mouseY
        cameraRotation.y += mouseX * mouseSesitivity;//Y轴想要旋转需要在X轴移动
        cameraRotation.x -= mouseY * mouseSesitivity;//X轴想要旋转需要在Y轴移动
        cameraRotation.x = Mathf.Clamp(cameraRotation.x, maxMinAngle.x, maxMinAngle.y);//cameraRotation.x的值控制在maxMinAngle.x和maxMinAngle.y两个值之间
        cameraTransform.rotation = Quaternion.Euler(cameraRotation.x, cameraRotation.y, 0);//更新相机的旋转角度
    }

1.2玩家移动的脚本

给玩家即（新建的空物体）添加此脚本，目前玩家的移动朝向不可跟随相机方向的旋转移动，锁定X，Z轴.

玩家游戏对象

锁定X、Y轴

新建【FPMovement】脚本

public class FPMovement : MonoBehaviour
{
    private Transform myTransform;
    public float speed;
    private Rigidbody myRigbody;
    void Start()
    {
        myTransform = transform;
        myRigbody = GetComponent<Rigidbody>();
    }
    private void FixedUpdate()
    {
        var h = Input.GetAxis("Horizontal");
        var v = Input.GetAxis("Vertical");
        var currentDirection= new Vector3(h, 0, v);
        //从自身坐标转为世界坐标
        currentDirection = myTransform.TransformDirection(currentDirection);
        currentDirection *= speed;//当前方向乘以速度 
        var currentVelocity = myRigbody.velocity;//获取当前的速度
        var velocityChange = currentDirection - currentVelocity;//得出需要以多少的速度进行行走
        velocityChange.y = 0;//不需要计算y轴的数值
        myRigbody.AddForce(velocityChange, ForceMode.VelocityChange);//添加力到刚体，让它随之移动
    }

1.3 玩家随相机旋转方向移动

修改【FPMouseLook】脚本

public class FPMouseLook : MonoBehaviour
{
    private Transform cameraTransform;
    [SerializeField] private Transform characterTransform;//记录玩家的位置，序列化到检视视图上或者使用public修饰
    private Vector3 cameraRotation; //保存每一帧存储下的坐标信息
    public float mouseSesitivity;//修改鼠标灵敏度
    public Vector2 maxMinAngle;//限制垂直视角区域
    void Start()
    {
        cameraTransform = transform;
    }
    void Update()
    {
        var mouseX = Input.GetAxis("Mouse X");//将鼠标输入的X值赋予mouseX
        var mouseY = Input.GetAxis("Mouse Y"); //将鼠标输入的Y值赋予mouseY
        cameraRotation.y += mouseX * mouseSesitivity;//Y轴想要旋转需要在X轴移动
        cameraRotation.x -= mouseY * mouseSesitivity;//X轴想要旋转需要在Y轴移动
        cameraRotation.x = Mathf.Clamp(cameraRotation.x, maxMinAngle.x, maxMinAngle.y);//cameraRotation.x的值控制在maxMinAngle.x和maxMinAngle.y两个值之间
        cameraTransform.rotation = Quaternion.Euler(cameraRotation.x, cameraRotation.y, 0);//更新相机的旋转角度
        characterTransform.rotation = Quaternion.Euler(0, cameraRotation.y, 0);//只需改变玩家旋转角度的Y值
    }
}

至此可以进行第一人称正常移动

1.4 控制玩家才地面才可移动，实现玩家跳跃的功能

修改【FPMovement】脚本

public class FPMovement : MonoBehaviour
{
    private Transform myTransform;
    public float speed;
    public float gravity;//定义一个重力，自己赋值
    public float jumpHeight;//定义跳跃的高度
    private Rigidbody myRigbody;
    private bool isGrounded;//判断是否玩家触地
    void Start()
    {
        myTransform = transform;
        myRigbody = GetComponent<Rigidbody>();
    }
    private void FixedUpdate()
    {
        if (isGrounded)
        {
            var h = Input.GetAxis("Horizontal");
            var v = Input.GetAxis("Vertical");
            var currentDirection = new Vector3(h, 0, v);
            //从自身坐标转为世界坐标
            currentDirection = myTransform.TransformDirection(currentDirection);
            currentDirection *= speed;//当前方向乘以速度 
            var currentVelocity = myRigbody.velocity;//获取当前的速度
            var velocityChange = currentDirection - currentVelocity;//得出需要以多少的速度进行行走
            velocityChange.y = 0;//不需要计算y轴的数值
            myRigbody.AddForce(velocityChange, ForceMode.VelocityChange);//添加力到刚体，让它随之移动
            if (Input.GetButtonDown("Jump"))//判断是否摁下跳跃键
            {
                myRigbody.velocity = new Vector3(currentVelocity.x, JumpHeightSpeed(), currentVelocity.z);//跳跃，玩家坐标的x与z轴均使用自身坐标，y轴为自己写的方法
            }
        }
        myRigbody.AddForce(new Vector3(0, -gravity * myRigbody.mass, 0));//如果未触地，则下坠
    }
    private float JumpHeightSpeed()//返回平方根，其数值作为玩家跳跃的y轴的值
    {
        return Mathf.Sqrt(2 * gravity * jumpHeight);
    }
    private void OnCollisionStay(Collision collision)
    {
        isGrounded = true;
    }
    private void OnCollisionExit(Collision collision)
    {
        isGrounded = false;
    }
}