相機跟隨和鼠標滾輪控制縮放

相機跟隨和鼠標滾輪控制縮放

using UnityEngine;
using System.Collections;

/// <summary>
/// 腳本掛在相機上
/// </summary>
public class CameraFollow : MonoBehaviour {

    //相機要跟隨的物體
    public Transform FollowTargetTransfrom;

    //相機 和 跟隨物體之間的偏移量
    public Vector3 offset;


    //攝像機的FieldOfView範圍
    private float MinMainCameraFieldOfView;
    private float MaxMainCameraFieldOfView;

	void Start () {
        offset = new Vector3(0.4857328f, 9.1733f, 11.28004f);

        MinMainCameraFieldOfView = 20;
        MaxMainCameraFieldOfView = 90;

	}
	
	// Update is called once per frame
	void Update () {
	
	}
    void FixedUpdate()
    {

        Vector3 targetPos = FollowTargetTransfrom.position + offset;
        transform.position = Vector3.Lerp(transform.position, targetPos, Time.deltaTime);


        //滾輪控制視野縮放
        //zoom in
        if (Input.GetAxis("Mouse ScrollWheel") < 0)
        {
            if (Camera.main.fieldOfView +2 < MaxMainCameraFieldOfView)
            {
                Camera.main.fieldOfView += 2;
            }
            else
            {
                Camera.main.fieldOfView = MaxMainCameraFieldOfView;
            }

        }

        //zoom out
        if (Input.GetAxis("Mouse ScrollWheel") > 0)
        {
            if (Camera.main.fieldOfView > MinMainCameraFieldOfView)
            {
                Camera.main.fieldOfView -= 2;
            }
            else
            {
                Camera.main.fieldOfView = MinMainCameraFieldOfView;
            }
            
        }
    }

}