Method and apparatus for identifying an object selected on a com

Details Method and apparatus for identifying an object selected on a com Method and apparatus for identifying an object selected on a com

1995-12-27

1998-03-24

Bayerl, Raymond J.

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

345348, 345352, 345353, 345355, G06F 314

Patent

active

057318140

ABSTRACT:
A technique for identifying an object selected from a plurality of objects displayed on an output display is disclosed. The technique includes grouping the objects into a plurality of scenes based on natural groupings. An identifier for each object is generated that uniquely identifies each object displayed. The identifier is dynamically partitioned into "n" segments based on the graphics subsystem, and each segment is mapped to a color representation in the graphics subsystem. In response to user selection of one of the objects, location information, which identifies the location of an object on the display, is generated. During each of "n" time intervals, a color mapped segment for each object is painted in a back buffer of a double buffered graphics subsystem, and the back buffer is subsequently queried for the color at the user selected location. The segments are accumulated to assemble the identifier for the selected object.

REFERENCES:
patent: 5335323 (1994-08-01), Kolnick
patent: 5625783 (1997-04-01), Ezekiel et al.
patent: 5666504 (1997-09-01), Crutcher
OpenGL programming guide: the official guide to learning OpenGL, release 1/OpenGL Architecture Review Board; Jackie Neider, Tom Davis, Mason Woo, Chapter 13, pp. 389-390.
Communications of the ACM, Apr., 1993, vol. 36, No. 4, "Information Visualization Using 3D Interactive Animation", Authors: George G. Robertson, Stuart K. Card, and Jock D. Mackinlay.

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