Method for interactive rotation of displayed graphic objects

Details Method for interactive rotation of displayed graphic objects Method for interactive rotation of displayed graphic objects

1985-02-19

1987-04-28

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340706, 340710, 340727, G09G 114

Patent

active

046618104

ABSTRACT:
A method is described for editing a graphic object being displayed by an interactive draw graphic system. The method is directed to a rotate edit action on a graphic object that can be selected from a group of individual objects that are being concurrently displayed in an overlaid fashion on the same screen. The method permits the operator to move the cursor that is involved in the object selection task away from the object after the object selection task is completed so that the cursor can be positioned in an uncluttered area of the screen. The direction of movement of the cursor is along the line extending from the center of the object through a point or line segment of the object that was adjacent the cursor the time the object was selected. When cursor motion is under the control of an input device, such as a mouse, the operator's efficiency and accuracy is increased since the desired amount of rotation becomes easier to obtain as the distance between the object and the cursor increases.

REFERENCES:
patent: 4116444 (1978-09-01), Mayer et al.
patent: 4504918 (1985-03-01), Axmann
patent: 4533911 (1985-08-01), Finegold
"The Lisa Computer System", BYTE, Feb. 1983, pp. 33-50, Gregg Williams.
"Computer Graphics Tutorial", edited by Kellogg S. Booth, IEEE Computer Society, 1979, One Touch Input of Vector Information for Computer Displays.

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