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Triangle

Triangle is a DOS workspace program intended for severely print-impaired students and professionals in math, science, and engineering. It includes:

• A math/science word processor
• a graphing calculator
• a viewer for y versus x plots
• a table viewer, and
• the Touch-and-Tell Program for audio and/or Braille-assisted reading of tactile figures on an external digitizing pad

In the word processor, the keyboard or any assistive device/software that emulates a keyboard may be used for input. Triangle output may be viewed:

• Visually on the DOS text screen
• Audibly using a screen-reading program and external voice synthesizer for text and the PC speaker or a SB16-compatible sound output for other audio
• Tactually using a Braille screen access program and external refreshable Braille display
• Any or all of the above simultaneously

The GS linear notation is used for scientific expressions. GS symbols that are not on the standard keyboard may be entered using a Braille keyboard option or several Menu selection options. The word processor has five different document buffers that provide basic editing capabilities, including search and cut and paste operations.

The calculator permits evaluation of most standard math expressions. Results are returned to the scratchpad buffer and may be cut and pasted to other documents. The calculator will also evaluate functions y versus x that can be viewed in audio. The tone graph viewer has a number of options and provides a blind user with a quick semi-quantitative overview. A moving icon on the screen provides similar information for a deaf blind user.

The table reader program allows two options for reading tables. One option, useful for reading tables with large cells, allows tables to be read cell by cell. The second option formats tables to be read line by line. The latter option is useful for small tables being read in Braille, but the first is usually preferable when speech synthesis is used or when tables are large. Tables may also be created or edited in this viewer.

The Touch-and-Tell program provides alternate-mode display for information presented visually in figures. The user selects an object or region on a figure that is mounted on a digitizing tablet. The touch-and-tell program then displays textual information about that object or region. This information can be read visually, audibly, or in Braille. Triangle supports the Nomad tablet, the Edmark Touch Window, and the MagicTouch touch screen digitising tablets.

FTP download is available at www.dots.physics.orst.edu . The TRIANGLE program is located in the pub/triangle/ subdirectory and is called triangle.zip.

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Eyeway intends building a community where people can share and learn from each other. If you would like to share your experiences about the Triangle with others, please send us your write-up at inspiration@eyeway.org

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