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# Expedients for the Construction of Rectangular Charts on a Processor Display

IP.com Disclosure Number: IPCOM000041507D
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

IBM

## Related People

Chan, YT: AUTHOR [+3]

## Abstract

The preceding article describes a mechanism for the formation of charts and graphs. When using the mechanism described therein wherein the line "trails" the cursor, several possibilities exist as to the proper display character to place into a display location. Our simple algorithm requires just two items to determine the proper character to place into the display position for a changing display. 1. The four characters adjacent to the cursor position. 2. A "to-direction" indicator. Thus, the algorithm consists of examining the adjacent characters to see if they are rectangular draw (or box) characters which can be connected by a rectangular draw character at the cursor position.

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Expedients for the Construction of Rectangular Charts on a Processor Display

The preceding article describes a mechanism for the formation of charts and graphs. When using the mechanism described therein wherein the line "trails" the cursor, several possibilities exist as to the proper display character to place into a display location. Our simple algorithm requires just two items to determine the proper character to place into the display position for a changing display. 1. The four characters adjacent to the cursor position. 2. A "to-direction" indicator. Thus, the algorithm consists of examining the adjacent characters to see if they are rectangular draw (or box) characters which can be connected by a rectangular draw character at the cursor position. Next, we select the character which makes the proper connection and use it together with the "to-direction" indicator to select the output character. If the characters cannot be connected (e.g., none of the four characters is a rectangular draw character), then the "to- direction" is used to determine if a vertical or horizontal bar should be placed at the cursor position.

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