Mirror inverse function in an interactive graphics system

Details Mirror inverse function in an interactive graphics system Mirror inverse function in an interactive graphics system

1985-10-24

1987-10-20

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340724, 340726, 340727, G09G 106

Patent

active

047017520

ABSTRACT:
A procedure for generating a mirror image of a graphic object on an interactive computer graphics display is disclosed. In the specific example described, a cursor locating device such as a mouse and an all points addressable display are assumed. The graphics object for which the mirror image is to be generated is selected by the pointing cursor. The mirror image function is also selected by the pointing cursor. This causes a default mirror image to be generated on the display along with the original image of the selected graphics object. In addition, a "mirror" with a direction handle and an angle handle is displayed in a window on the display. Either of these handles may be "grabbed" by selecting with the pointing cursor and then rotated to manipulate the generated mirror image and the selected object on the display. When the direction handle is rotated, the generated mirror image and the selected object are simultaneously rotated in the plane of the display. When the angle handle is rotated, the generated mirror image and the selected object are simultaneously stretched or shrunk depending on the direction of rotation to provide a "butterfly" effect.

REFERENCES:
"Diagraph", Computer Support Corp. 1984, pp. 22-25.
Kaehler et al. "MacPaint.TM.", Apple Computer Corp. 1983.

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