- Member vpgl_perspective_camera< T >::cast_to_perspective_camera ()
- code for affine camera and other children
- Member vpgl_perspective_camera< T >::postmultiply (const vpgl_perspective_camera< T > &in_cam, const vgl_h_matrix_3d< T > &euclid_trans)
- decide whether this needs to be either a static method or a stand-alone function. (Now both are present.)
