【转】摄像机漫游脚本

//-----------------------------------------------------------------  
//1，把本类作为一个组件，包含在 GameObject 中。  
//2，左手坐标系。  
//-----------------------------------------------------------------  
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
//-----------------------------------------------------------------  
public class CameraControl : MonoBehaviour
{
    public float moveSpeed = 8.0f;
    public float rotateSpeed = 0.05f;


    public static Vector3 kUpDirection = new Vector3(0.0f, 1.0f, 0.0f);


    //控制摄像机旋转的成员变量。  
    private float m_fLastMousePosX = 0.0f;
    private float m_fLastMousePosY = 0.0f;
    private bool m_bMouseRightKeyDown = false;


    //-----------------------------------------------------------------  
    void Start()
    {


    }
    //-----------------------------------------------------------------  
    void Update()
    {
        //判断旋转  
        if (Input.GetMouseButtonDown(1)) //鼠标右键刚刚按下了  
        {
            if (m_bMouseRightKeyDown == false)
            {
                m_bMouseRightKeyDown = true;
                Vector3 kMousePos = Input.mousePosition;
                m_fLastMousePosX = kMousePos.x;
                m_fLastMousePosY = kMousePos.y;
            }
        }
        else if (Input.GetMouseButtonUp(1)) //鼠标右键刚刚抬起了  
        {
            if (m_bMouseRightKeyDown == true)
            {
                m_bMouseRightKeyDown = false;
                m_fLastMousePosX = 0;
                m_fLastMousePosY = 0;
            }
        }
        else if (Input.GetMouseButton(1)) //鼠标右键处于按下状态中  
        {
            if (m_bMouseRightKeyDown)
            {
                Vector3 kMousePos = Input.mousePosition;
                float fDeltaX = kMousePos.x - m_fLastMousePosX;
                float fDeltaY = kMousePos.y - m_fLastMousePosY;
                m_fLastMousePosX = kMousePos.x;
                m_fLastMousePosY = kMousePos.y;


                Vector3 kNewEuler = transform.eulerAngles;
                kNewEuler.x += (fDeltaY * rotateSpeed);
                kNewEuler.y += -(fDeltaX * rotateSpeed);
                transform.eulerAngles = kNewEuler;
            }
        }


        //判断位移  
        float fMoveDeltaX = 0.0f;
        float fMoveDeltaZ = 0.0f;
        float fDeltaTime = Time.deltaTime;
        if (Input.GetKey(KeyCode.A))
        {
            fMoveDeltaX -= moveSpeed * fDeltaTime;
        }
        if (Input.GetKey(KeyCode.D))
        {
            fMoveDeltaX += moveSpeed * fDeltaTime;
        }
        if (Input.GetKey(KeyCode.W))
        {
            fMoveDeltaZ += moveSpeed * fDeltaTime;
        }
        if (Input.GetKey(KeyCode.S))
        {
            fMoveDeltaZ -= moveSpeed * fDeltaTime;
        }
        if (fMoveDeltaX != 0.0f || fMoveDeltaZ != 0.0f)
        {
            Vector3 kForward = transform.forward;
            Vector3 kRight = Vector3.Cross(kUpDirection, kForward);
            Vector3 kNewPos = transform.position;
            kNewPos += kRight * fMoveDeltaX;
            kNewPos += kForward * fMoveDeltaZ;
            transform.position = kNewPos;
        }
    }
}

原链接：http://www.cnblogs.com/oilcode/p/6927951.html