Two Types Of Graphics Programs; The Planning Process - Epson FX-80 User Manual

Chapter 14
Two Types of Graphics Programs
In this chapter we take you through the development of two
graphics programs, from design to implementation. In the process,
you'll have a chance to explore the way data are used to produce more
complex designs.
The two programs use entirely different techniques. The first pro-
gram uses a method of storing and recalling data similar to that used in
the ribbon program in the last chapter; pin patterns and their repeti-
tion factors are stored in DATA statements. The second program does
not read pin patterns from DATA statements. Instead, the few pin
patterns needed are coded into the program as constants, while the
DATA lines contain only the number of repetitions for the patterns.
These examples show how easy it is to create high-resolution dot
graphics on your FX-80. We hope they inspire you to include graphics
in your own programs.
The Planning Process
It should be apparent by now that printing high-resolution images
requires careful planning and lots of data. There are programs avail-
able for some computers that enable users to draw figures on the
screen, then dump them to the printer. Without such a program, there
really is no quick and easy way to calculate the data required for pin
patterns.
The usual routine goes like this:
1) Plot the designs, dot by dot, on graph paper.
2) Translate the dots into their appropriate pin numbers, seven or
eight rows at a time.
3) Figure out the easiest way to send those numbers to the printer.
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