unity3d鼠标滚轮实现摄像头拉近后退

Question

void Update (){target = GameObject.Find("new_offer");// 滚轮设置 相机与人物的距离.if(Input.GetAxis("Mouse ScrollWheel") != 0){theDistance = theDistance + Input.GetAxis("Mouse ScrollWheel") * Time.deltaTime * ScrollKeySpeed;}// 鼠标中间滚动得到的值是不确定的,不会正好就是0,或 -10,当大于0时就设距离为0,小于MaxDistance就设置为MaxDistanceif(theDistance>0){ theDistance = 0;}if(theDistance < MaxDistance){ theDistance = MaxDistance;}transform.position = target.transform.position;SetDistance();}void Start (){if (rigidbody){rigidbody.freezeRotation = true;transform.position = target.transform.position;}}//设置相机与人物之间的距离void SetDistance(){transform.Translate(Vector3.forward * theDistance);}请问，运行时发现摄像头只是上下移动，并不实现拉近后退的效果，这是为什么？

Answer 1

不是distance，是fieldOfView，把下面的代码保存为C#再赋给主相机

using UnityEngine;
using System.Collections;

public class CubeStatic : MonoBehaviour
{

public float minFov = 15f;
public float maxFov = 90f;
public float sensitivity = 10f;

void Update()
{
float fov = Camera.main.fieldOfView;
fov += Input.GetAxis("Mouse ScrollWheel") * sensitivity;
fov = Mathf.Clamp(fov, minFov, maxFov);
Camera.main.fieldOfView = fov;
}
}