Dynamic control of zoom operation in computer graphics

Details Dynamic control of zoom operation in computer graphics Dynamic control of zoom operation in computer graphics

1998-05-11

2000-04-18

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345146, 345339, G09G 508

Patent

active

060521104

ABSTRACT:
Various objects, images, pictures, etc. are selectively enlarged or reduced on a screen using a zoom operation. To view an object, for example, on the screen with less details or more details than the current display of the object, a cursor positioned on the screen display using an input device is utilized to fix a reference location located on a circle of a predetermined diameter. By moving the cursor on the screen display, a line between the cursor and the reference location is provided. The direction of the line indicates direction of the zoom operation: if the line is inside the circle, the object is zoomed-out, and if the line is outside the circle, the object is zoomed in. The length of the line determines speed of the zoom operation.

REFERENCES:
patent: 5880722 (1999-03-01), Brewer et al.
patent: 5910801 (1999-06-01), Rosenburg et al.

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