Navigation methods, systems, and computer program products for virtual three-dimensional books
A system is described for displaying images of a virtual three-dimensional book having one or more virtual pages. The system comprises a display system capable of executing a display program wherein images of the virtual three-dimensional book are produced on the display system. A degree of interest (DOI) function is provided for allocating available space on the display system. A page selection function may provide a user-selectable scale along a long axis of the virtual book for selecting virtual pages. Virtual chapter tabs may also be provided for navigating within the virtual book. The display system may also include a page flipping function with several different page flipping speeds and several different page flipping animations for moving between virtual pages in the virtual book. Moreover, a scroll bar function provided to facilitate page navigation wherein space on the scroll bar is allocated using a DOI function. Finally, a computer program product comprising a computer usable medium having computer readable code embodied therein for producing images of a virtual three-dimensional book is also disclosed.
1. A system for displaying images of a virtual three-dimensional book having one or more virtual pages, the system comprising:
a display system capable of executing a display program,
wherein images of the virtual three-dimensional book are produced on the display system,
a page selection function is provided, the page selection function comprising a user-selectable scale along an axis of the virtual three-dimensional book for selecting virtual pages, the user selectable scale being non-linear and a function of a degree of interest value, and
the degree of interest (DOI) value comprises a page distance from a currently displayed page, falls off exponentially from the currently displayed page, and is determined for each page number p using the function
DOI
(
p
)
=
1
A
ⅇ
k
c
-
p
wherein A and k are constants, e is the base of natural logarithms, and |c-p| is the absolute value of the difference between a current page number c and each page number p.
2. A method for displaying a virtual book comprising:
producing images of a virtual three-dimensional book having one or more virtual pages on a display device; and
displaying a user-selectable scale along an axis of the virtual three-dimensional book for selecting virtual pages, the user selectable scale being non-linear and a function of a degree of interest value,
the degree of interest (DOI) value comprises a page distance from a currently displayed value, falls off exponentially from the currently displayed page, and is determined for each page number p using the function
DOI
(
p
)
=
1
A
ⅇ
k
c
-
p
wherein A and k are constants, e is the base of natural logarithms, and |c-p|is the absolute value of the difference between a current page number c and each page number p.