1993-02-26
1995-10-24
Powell, Mark R.
395157, G06F 938
Patent
active
054617090
ABSTRACT:
A system for supplying input data establishes the location of data points in a model space represented in a view of a two-dimensional display. In one embodiment, the system has a pointing device (such as a mouse) for establishing the location of a cursor on the display, and also an arrangement for establishing in the model space primary and secondary orientation planes of which one is currently active at any given time. The embodiment also has an arrangement for providing an initial value (called the "start point") of a tentative point in the model space. A dynamic arrangement establishes a current point in a construction plane, parallel to the active plane, in which the tentative point is located, in the location attributable to the position of the cursor on the display of the view. On command (typically when the cursor is in a desired position) a tentative selection arrangement copies the current point data to the tentative point data and toggles the active plane from one to the other of the primary and secondary planes. On command, typically when the user is satisfied with the location of the tentative point, a final selection arrangement provides input point data using the data of the tentative point.
REFERENCES:
patent: 4812829 (1989-03-01), Ebina et al.
patent: 4835528 (1989-05-01), Flinchbaugh
patent: 4987527 (1991-01-01), Hamada et al.
patent: 5181181 (1993-01-01), Glynn
patent: 5264836 (1993-11-01), Rubin
Ba Huynh
Intergraph Corporation
Powell Mark R.
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