Graphic display processing system and displayed pattern picking

Details Graphic display processing system and displayed pattern picking Graphic display processing system and displayed pattern picking

1988-07-22

1990-09-18

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

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

340703, 340729, G09G 500

Patent

active

049581473

ABSTRACT:
A graphic display processing system is disclosed, in which a two-dimensional pattern or an image of a three-dimensional pattern can be displayed on the display screen of a display device, and moreover it can be rapidly judged whether or not each graphic data on a display list formed in a graphic data buffer corresponds to a pattern in a pattern pick region (namely, pick aperture) set on the display screen. In more detail, display color data in the pick aperture is first read out of a frame memory for storing image data. In a case where an image of a three-dimensional pattern is displayed, depth values in the pick aperture are read out of a Z-buffer for storing depth values with respect to a displayed pattern. Next, the read-out display color data is compared with display color commands on the display list, or the read-out depth values are compared with depth values obtained from geometrical form commands on the display list, to check whether or not each graphic data on the display list indicates the same display color or depth value as that of a pattern to be picked, thereby selecting only graphic data which is judged to indicate the same display color or depth value as that of the to-be-picked pattern. Then, it is checked whether or not the selected graphic data indicates a pattern intersecting with the pick aperture. Thus, desired graphic data can be rapidly picked out of the display list.

REFERENCES:
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patent: 4642625 (1987-02-01), Tsuneshiro et al.
patent: 4679041 (1987-07-01), Fetter et al.
patent: 4808986 (1989-02-01), Mansfield et al.
patent: 4812988 (1989-03-01), Duthuit et al.
patent: 4813013 (1989-03-01), Dunn
patent: 4847605 (1989-07-01), Callahan et al.

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