用unity脚本实现角色移动

在 Unity 中，角色移动可以通过使用脚本实现。下面是一个简单的代码示例，使用键盘控制角色移动：

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    public float speed = 6f;

    Vector3 movement;
    Animator anim;
    Rigidbody playerRigidbody;
    int floorMask;
    float camRayLength = 100f;

    void Awake ()
    {
        floorMask = LayerMask.GetMask ("Floor");
        anim = GetComponent <Animator> ();
        playerRigidbody = GetComponent <Rigidbody> ();
    }

    void FixedUpdate ()
    {
        float h = Input.GetAxisRaw ("Horizontal");
        float v = Input.GetAxisRaw ("Vertical");

        Move (h, v);
        Turning ();
        Animating (h, v);
    }

    void Move (float h, float v)
    {
        movement.Set (h, 0f, v);
        movement = movement.normalized * speed * Time.deltaTime;
        playerRigidbody.MovePosition (transform.position + movement);
    }

    void Turning ()
    {
        Ray camRay = Camera.main.ScreenPointToRay (Input.mousePosition);
        RaycastHit floorHit;
        if(Physics.Raycast (camRay, out floorHit, camRayLength, floorMask))
        {
            Vector3 playerToMouse = floorHit.point - transform.position;
            playerToMouse.y = 0f;

            Quaternion newRotation = Quaternion.LookRotation (playerToMouse);
            playerRigidbody.MoveRotation (newRotation);
        }
    }

    void Animating (float h, float v)
    {
        bool walking = h != 0f || v != 0f;
        anim.SetBool ("IsWalking", walking);
    }
}

该代码使用 `Input.GetAxisRaw` 函数获取玩家输入的水平和垂直方向，然后使用 `Move` 函数对角色位置进行更新。其中 `Turning` 函数用于实现鼠标控制角色朝向，`Animating` 函数用于更新角色动画。