• W/S :: 前進/後退
• A/D :: 下降/上升
• 滑鼠滾輪 :: 物件移動的速度
• 游標水平移動 :: 物件左右方向旋轉
• 游標上下移動 :: 物件上下方向旋轉

using UnityEngine;
using System.Collections;

public class ObjectController : MonoBehaviour
{
    // x方向移動的速度
    public float xSpeed = 1f;

    // y方向移動的速度
    public float ySpeed = 1f;

    // z方向移動的速度
    public float
 
 zSpeed = 1f;


    public Vector3 velocity = Vector3.zero;

    // 是否按下A鍵
    private bool isAdown = false;
    // 是否按下D鍵
    private bool isDdown = false;

    private float x = 0.0f;
    private float y = 0.0f;


    void Update()
    {
        float theZ = Input.GetAxis("Vertical") * this.zSpeed;
        float
 
 theX = Input.GetAxis("Horizontal") * this.xSpeed;

        // 設定位移
        Vector3 v1 = new Vector3(0, 0, theZ);
        v1 = this.transform.TransformDirection(v1);
        v1 = v1 - Vector3.Dot(v1, Vector3.up) * Vector3.up;
        v1 = this.transform.InverseTransformDirection(v1);
        this.transform.Translate(v1);

        // 設定旋轉角度
 

        Vector3 v2 = new Vector3(0, theX, 0);
        this.transform.Rotate(v2);

        if (Input.GetKeyDown(KeyCode.A))
            this.isAdown = true;
        else if (Input.GetKeyUp(KeyCode.A))
            this.isAdown = false;
        else if (Input.GetKeyUp(KeyCode.D))
            this.isDdown = false;
        else if (Input.GetKeyDown(KeyCode.D))
            this.isDdown = true;

        if (this.isAdown)
            this.transform.position = Vector3.SmoothDamp(this.transform.position
                    , this.transform.position - new Vector3(0, this.ySpeed, 0)
                    , ref velocity, 0.1f);
        if (this.isDdown)
            this.transform.position = Vector3.SmoothDamp(this.transform.position
                    , this.transform.position + new Vector3(0, this.ySpeed, 0)
                    , ref velocity, 0.1f);

        float zoom = Input.GetAxis("Mouse ScrollWheel");
        if (this.zSpeed + zoom < 10 && this.zSpeed + zoom > 0.1)
            this.zSpeed += zoom;
    }

    private void Rotate()
    {
        this.x += Input.GetAxis("Mouse X") * this.xSpeed;
        this.y -= Input.GetAxis("Mouse Y") * this.ySpeed;

        if (this.y < -360f)
            this.y += 360f;
        if (this.y > 360f)
            this.y -= 360f;

        y = Mathf.Clamp(y, -20f, 80f);
        Quaternion rotation = Quaternion.Euler(y * 0.5f, x, 0);
        this.transform.rotation = rotation;
    }

    private void LateUpdate()
    {
        Rotate();
    }
}