Unity3D让物体始终朝向摄像机的2中方法

标签：unity3d

1、设置rotation

此方法的基础是将对象绑定在场景中的一个对象上，然后设置对象的rotation或者lookat，需要在Update中时时更新

//方法1
//m_Name.transform.LookAt(Camera.main.transform.position);	
//m_Name.transform.rotation = Quaternion.Slerp(Quaternion.LookRotation(Camera.main.transform.position - m_Name.transform.position), m_Name.transform.rotation, 10 * Time.deltaTime);
//方法2
//Vector3 v = Camera.main.transform.forward;
//m_Name.transform.forward = v;
//m_Name.transform.forward = Vector3.Slerp (m_Name.transform.forward,v,10*Time.deltaTime);
//方法3
    lastRotation = m_cameraTransform.rotation;
    m_Name.transform.rotation = lastRotation;   

headShowObj = new GameObject("playerName");
objTrans = headShowObj.transform;
objTrans.parent = _controller.trans;// Camera.main.transform;
objTrans.localPosition = Vector3.zero + v;
objTrans.localRotation = Quaternion.identity;
objTrans.localScale = Vector3.one;
objTrans.LookAt(Camera.main.transform.position);
m_Name = headShowObj.AddComponent<TextMeshPro>();
m_Name.font = Resources.Load ("UI/Fonts/SIMLI",typeof(TextMeshProFont)) as TextMeshProFont;
m_Name.fontSize = 4;
m_Name.isOverlay = true;
m_Name.alignment = AlignmentTypes.Center;
m_Name.anchor = AnchorPositions.Center;

2、设置position

此方法的基础是在对象初始化的时候设置对象的rotation或者lookat，然后在Update中更新对象的position

初始化方法：

headShowObj = new GameObject("playerName");
objTrans = headShowObj.transform;
objTrans.parent = _controller.trans;// Camera.main.transform;
objTrans.localPosition = _controller.trans.localPosition + v;
objTrans.localRotation = Quaternion.identity;
objTrans.localScale = Vector3.one;
objTrans.LookAt(Camera.main.transform.position);
m_Name = headShowObj.AddComponent<TextMeshPro>();
m_Name.font = Resources.Load ("UI/Fonts/SIMLI",typeof(TextMeshProFont)) as TextMeshProFont;
m_Name.fontSize = 4;
m_Name.isOverlay = true;
m_Name.alignment = AlignmentTypes.Center;
m_Name.anchor = AnchorPositions.Center;
lastRotation = m_cameraTransform.rotation;
m_Name.transform.rotation = lastRotation;

但是，有一个想法：加入我在初始化时就设置对象的rotation为面向摄像机，而且把它绑定在场景中的父对象，这样就不用updateposition和rotation了，但是试了下，当父对象rotation时，子对象也跟着rotation，所以，rotation或者position是必须有一个是update的。

Unity3D让物体始终朝向摄像机的2中方法

标签：unity3d

原文地址：http://blog.csdn.net/yuxikuo_1/article/details/45642129