学步园

网上看到些Unity3D的公告板的方法，国内的有问题，国外的那个http://www.unifycommunity.com/wiki/index.php?title=CameraFacingBillboard还是对的，不过初始朝向方向要是+-Z轴。

改了点可以设置面向法线，然后对面的默认朝向就没啥子要求了。

using UnityEngine;
using System.Collections;

public class Billboard : MonoBehaviour {
	
	public Camera m_Camera;
	public Vector3 Normal;
	Quaternion direction;
	
	// Use this for initialization
	void Start () {
		direction=Quaternion.FromToRotation (new Vector3 (0, 0, 1), Normal);
	}
	
	// Update is called once per frame
	void Update ()
	{
		transform.rotation = m_Camera.transform.rotation* direction;
	}

}

今天又用到这个脚本，以前写那个不方便调节，在弄初始朝向的时候，用法线麻烦的很。改了哈直接保存初始旋转数据，相机获取也改了哈。

默认为空时，取当前使用相机。
 

using UnityEngine;
using System.Collections;

public class Billboard : MonoBehaviour {

    public Camera camera;
	Quaternion direction=new Quaternion();
	
	// Use this for initialization
	void Start () {
        direction.x = transform.localRotation.x;
        direction.y = transform.localRotation.y;
        direction.z = transform.localRotation.z;
        direction.w = transform.localRotation.w;
	}
	
	// Update is called once per frame
	void Update ()
	{
        Camera cam=null;
        if (camera != null)
        {
            cam = camera;
        }
        else
        {
            cam = Camera.current;
            if (!cam)
                return;
        }
        transform.rotation = cam.transform.rotation * direction;
	}

}