Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Reexamination Certificate
1999-07-07
2001-09-11
Jankus, Almis R. (Department: 2772)
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
Reexamination Certificate
active
06288721
ABSTRACT:
TECHNICAL FIELD
This invention relates to the field of digital processes for the computer display of map information and more particularly to processes for illuminating and rendering map information in real time for depiction as a moving map display.
BACKGROUND ART
U.S. Pat. No. 5,579,456 for “Direct Rendering of Textured Height Fields” shows the a process for creating “a dynamic textured display, images of textured height fields(elevation samples arrayed on a rectangular coordinate grid, as to represent terrain)” and for rendering the image. However, the process taught re-samples the height field data into a radial form and does not show the process of converting the regular grid raw data into regular interval triangular strips nor the subsequent step of computing the relative illumination of each triangle in the strips, and passing the strips to a graphic processor.
This invention focuses on the specific issues in pre-processing gridded terrain data in order to achieve a real-time, computer efficient formulation for fast execution.
REFERENCES:
patent: 4855934 (1989-08-01), Robinson
patent: 5579456 (1996-11-01), Cosman
patent: 5699497 (1997-12-01), Erdahl et al.
Litton Guidance & Control Systems, Tactical Aircraft Moving Map Capability (TAMMAC) Program. Nov. 27, 1995, pp. 27,28.
Litton Guidance & Control Systems Div., 19601 Nordhoff Street, Northridge, California, 91324-2422.
Donoghue Patrick
Kinsinger Tor
Cunningham G. F.
Jankus Almis R.
Litton Systems Inc.
Price and Gess
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