Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Reexamination Certificate
2001-09-27
2008-10-21
Zimmerman, Mark (Department: 2671)
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
C345S215000, C345S215000, C345S215000, C345S215000, C345S215000, C345S215000
Reexamination Certificate
active
07439975
ABSTRACT:
A methodology for generating a drop shadow effect for objects in a graphical user interface is presented. A first object in a presentation space occludes the illumination from a simulated light source, and a dynamically determined drop shadow from the first object may partially occlude a second object. A portion of a drop shadow from the first object is shown on the second object; the portion of the drop shadow from the first object is displaced from the first object in direct proportion to a z-depth difference between the first object and the second object. Hence, a drop shadow can be generated in a computationally inexpensive manner, and the dynamically determined drop shadow enhances the perception of depth within the presentation space by a user.
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Arnold Adam
Burwell Joseph R.
International Business Machines - Corporation
LaBaru Jeffrey S.
Zimmerman Mark
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