物品展示必备代码（旋转与缩放代码…_让物品旋转的代码-优快云博客

本文介绍了一个Unity中的鼠标跟随旋转脚本，通过此脚本玩家可以使用鼠标来控制摄像机的旋转和平移，实现自由视角的效果。该脚本还支持平滑过渡效果，使旋转更加自然。

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using UnityEngine;

public class MouseFollowRotation : MonoBehaviour {

    public Transform target;

    public float xSpeed=200, ySpeed=200, mSpeed=10;

    public float yMinLimit=-50, yMaxLimit=50;

    public float distance=7, minDistance=2, maxDistance=30;

    //bool needDamping = false;

    public bool needDamping =true;

    float damping = 5.0f;

    public float x = 0.0f;

    public float y = 0.0f;

    public void SetTarget( GameObject go )

    {

        target = go.transform;

    }

    // Use this for initialization

    void Start () {

        Vector3 angles = transform.eulerAngles;

        x = angles.y;

        y = angles.x;

    }

    // Update is called once per frame

    void LateUpdate ()

    {

        if (target)

        {

        //use the light button of mouse to rotate the camera

            if( Input.GetMouseButton(0) )

            {

                x += Input.GetAxis("Mouse X") * xSpeed * 0.02f;

                y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;

                y = ClampAngle(y, yMinLimit, yMaxLimit);

                //print(Input.GetAxis("Mouse X"));

                //print( Input.GetAxis("Mouse Y"));

                //print(x);

                //print(y);

                //Unity3D教程手册：[url]www.unitymanual.com[/url]

            }

             distance -= Input.GetAxis("Mouse ScrollWheel")*mSpeed;

            distance = Mathf.Clamp(distance, minDistance, maxDistance);

            Quaternion rotation = Quaternion.Euler(y, x, 0.0f);

            Vector3 disVector = new Vector3( 0.0f, 0.0f, -distance );

            Vector3 position = rotation * disVector + target.position;

            //adjust the camera

            if( needDamping )

            {

                transform.rotation = Quaternion.Lerp(transform.rotation, rotation, Time.deltaTime*damping);

                transform.position = Vector3.Lerp(transform.position, position, Time.deltaTime*damping);

            }

            else

            {

                transform.rotation = rotation;

                transform.position = position;

            }

              //Unity3D教程手册：[url]www.unitymanual.com[/url]

        }

    }

    static float ClampAngle (float angle, float min, float max)

    {

    if (angle < -360)

        angle += 360;

    if (angle > 360)

        angle -= 360;

    return Mathf.Clamp (angle, min, max);

    }

}