How to detect the object behind the camera or view point.

[Anonymous]

Is there any one know how to detect the object behind the camera or view point?

[Steve_Curley]

Behind a camera is possible, I've no idea about the viewport "camera".
This thread may give you some idea about how to detect an object, though may not be exactly what you need. A bit more detail about what you're tryng to achieve would be useful.