/// <summary>
/// 让摄像机看向某个Obj，fDuration为0则不做移动动画
/// </summary>
/// <param name="target"></param>
/// <param name="onCameraMoveDone">当移动动画结束时的回调，fDuration为0时不会调用</param>
/// <param name="fDuration">移动动画时长</param>
public void LookTarget(Obj target, CameraDefine.CameraMoveDoneCallback onCameraMoveDone = null, float fDuration = CameraDefine.m_fDefaultCameraMoveTime)
{
m_State.LookTarget(target, onCameraMoveDone, fDuration);
}
