Method and apparatus for spherical panning

Details Method and apparatus for spherical panning Method and apparatus for spherical panning

1987-04-06

1988-03-29

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340723, 340727, 364521, 364522, G09G 102

Patent

active

047346906

ABSTRACT:
A graphics display terminal performs a pan operation with respect to a view motion center to effectuate spherical panning, thereby providing perspective and non-perspective views. Three dimensional instructions stored in terminal memory are re-transformed in accordance with a panned direction. Also a zoom feature is provided so that displayed images may be magnified as desired.

REFERENCES:
patent: 4475104 (1984-10-01), Shen
patent: 4532605 (1985-07-01), Waller
patent: 4549275 (1985-10-01), Sukonick
"The Adage Graphics Terminal"; by Thomas C. Hagen et al.; pp. 64-72; from Interactive Computer Graphics, IEEE Computer Society 1980.
"A Computer Program for Drawing in Three Dimensions"; by Timothy E. Johnson, pp. 20-26, from Interactive Computer Graphics, IEEE Computer Society 1980.
"A Procedure for Generating Visible Line Projections of Solids Bounded by Quadratic Surfaces"; by Peter Woon et al., from Information Processing 71, 1972.
IBM Technical Disclosure Bulletin; "Program for the Interactive Design of Polyhedra", by A. Appel et al.

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