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prints dots in only half the possible dot positions in any one row. The
higher density means that the resolution of the pattern is better than in
single-density mode. When you design patterns in these two modes,
however, you must make sure that no dots overlap.
Reassigning a graphics mode
Another graphics command lets you assign a different eight-pin graphics
mode to one of the specific eight-pin graphics commands. You can use
this command with graphics software programs to quickly change the
density and proportions of your printouts. Changing the graphics option
changes the width without changing the height.
The command for reassigning a graphics mode is ESC ? c m. In this
command, c is a letter designating one of the four alternate graphics
codes (K, L, Y, or Z) and m is the mode number of the new mode, as
listed in
the
table on page
4-15.
For example, to change the ESC K command to select the CRT I screen
graphics mode, the command in BASIC is’ the following:
LPRINT CHR$(27);"?K";CHR$(4);
A little experimentation should tell you whether the reassigning
command can improve your graphics printouts.
Designing your own graphics
This section takes you through the development of a graphics program.
The example is not especially complicated, but it does include the same
steps you would use for a more complex figure.
You should plan your figure with dots on graph paper, but before beginning
to place the dots, you must decide which graphics density you want. The
figure on the next page shows the differences
between three common
modes.
4-16
Using Software and Graphics