04622641 is referenced by 21 patents and cites 8 patents.

A user-friendly procedure for the generation and display of geometric figures on a graphics screen uses a cursor placement device such as a joy stick to both define the initial position and size of the geometrical figure. Two specific examples are described: the generation of a circle and the generation of a square or rectangle. In the first example, the cursor is first positioned to point to the center of the circle at which point a small circle is drawn. The circle is expanded in response to the pressing of a designated key by the user until the desired size is attained. In the second example, the pointing by the cursor is to the upper left corner of the square or rectangle, and the square or rectangle is then expanded in response to the user deflecting the joy stick down and to the right.

Title
Geometrical display generator
Application Number
6/531651
Publication Number
4622641
Application Date
September 13, 1983
Publication Date
November 11, 1986
Inventor
Lawrence K Stephens
Dallas
TX, US
Agent
C Lamont Whitham
Assignee
International Business Machines
NY, US
IPC
G06F 15/626
G06F 15/40
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