物品展示必备代码（旋转与缩放代码） - 纳金网

<pre>using UnityEngine;
using System.Collections;
// 直接放在相机上，控制相机的旋转和缩放 //
public class CameraContro : 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);
//<a target="_blank" class="relatedlink">unity3d</a>教程手册：www.unitymanual.com
}
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：www.unitymanual.com
}
}
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);
}
}
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