Unity3D学习笔记之unity3D第一人称移动实现

为角色添加两个脚本 PlayerMotor.cs PlayerController.cs 分开处理输入信息和输出信息

PlayerController.cs： 

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
[RequireComponent(typeof(PlayerMotor))]
public class PlayerController : MonoBehaviour
{
    [SerializeField]
    private float speed = 5f;
    [SerializeField]
    private float lookSensitivity = 3f;

    private PlayerMotor motor;
    // Start is called before the first frame update
    void Start()
    {
        motor = GetComponent<PlayerMotor>();
    }

    // Update is called once per frame
    void Update()
    {
        float _xMov = Input.GetAxis("Horizontal");
        float _zMov = Input.GetAxis("Vertical");

        Vector3 _movHorizontal = transform.right * _xMov;
        Vector3 _movVertical = transform.forward * _zMov;

        // Final movement vector
        Vector3 _velocity = (_movHorizontal + _movVertical) * speed;
        motor.Move(_velocity);

        float _yRot = Input.GetAxisRaw("Mouse X");

        Vector3 _rotation = new Vector3(0f, _yRot, 0f) * lookSensitivity;

        //Apply rotation
        motor.Rotate(_rotation);

        float _xRot = Input.GetAxisRaw("Mouse Y");

        Vector3 _cameraRotation = new Vector3(_xRot, 0f, 0f) * lookSensitivity;

        //Apply camera rotation
        motor.RotateCamera(_cameraRotation);
    }
}

PlayerMotor.cs： 

using UnityEngine;

[RequireComponent(typeof(Rigidbody))]//在为物体添加此脚本时自动添加刚体组件
public class PlayerMotor : MonoBehaviour
{
    [SerializeField]//序列化使在unity界面可以改动
    private Camera cam;
    private Vector3 velocity = Vector3.zero;//初始化移动向量
    private Vector3 rotation = Vector3.zero;//初始化旋转向量
    private Vector3 cameraRotation = Vector3.zero;//初始化相机旋转向量

    private Rigidbody rb;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    public void Move(Vector3 _velocity)
    {
        velocity = _velocity;
    }

    public void Rotate(Vector3 _rotation)
    {
        rotation = _rotation;
    }

    public void RotateCamera(Vector3 _cameraRotation)
    {
        cameraRotation = _cameraRotation;
    }

    void FixedUpdate()
    {
        PerformMovement();
        PerformRotation();
    }
    void PerformMovement()
    {
        if (velocity != Vector3.zero)
        {
            rb.MovePosition(rb.position + velocity * Time.fixedDeltaTime);
        }
    }

    void PerformRotation()
    {
        rb.MoveRotation(rb.rotation * Quaternion.Euler(rotation));
        if (cam != null)
        {
            cam.transform.Rotate(-cameraRotation);
        }
    }
}

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