判断物体摄像机是否可见

判断物体摄像机是否可见 

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   ///<summary>

   ///判断世界坐标系内的物体,摄像机是否可见

   ///</summary>

   ///<param name="obj"></param>

   ///<returns></returns>

   publicstaticboolisVisibleOn3dCamera(thisGameObjectobj,Cameracamera3d)

    {

       Vector3pos = camera3d.WorldToViewportPoint(obj.transform.position);

       // Determine the visibility and the target alpha

       boolisVisible = (camera3d.orthographic || pos.z > 0f) && (pos.x > 0f && pos.x < 1f && pos.y > 0f && pos.y < 1f);

       returnisVisible;

    }

       ///<summary>

       ///判断世界坐标系内的一个点,摄像机是否可见

       ///</summary>

       ///<param name="obj"></param>

       ///<returns></returns>

       publicstaticboolisVisibleOn3dCamera(thisVector3pos,Cameracamera3d)

        {

            pos = camera3d.WorldToViewportPoint(pos);

           boolisVisible = (camera3d.orthographic || pos.z > 0f) && (pos.x > 0f && pos.x < 1f && pos.y > 0f && pos.y < 1f);

           returnisVisible;

        }