I am planning to buy a GPS enabled android phone and develop an Augmented Reality application (which will point the locations in front of camera).
All i found about GPS is that it just tells the location of the device, how do i get the direction where camera is pointing, and height of device? how to make compass (2D, 3D) with GPS enabled phone?
Is responsibility of phone to tell the direction?
(please correct, if i asked this question at wrong place)