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Graphics
Rubberband Line Mode
Turn Rubberband Line On:
Thrn Rubberband Line off:
Ec
*
dm
Ec * dn
((Rubberband Line" mode causes the terminal to display a temporary line connecting the
graphics cursor to the current pen position. As the cursor is moved (using the cursor control
keys or move cursor commands), the temporary line moves, stretches, or contracts as required
to maintain the connection. The temporary line is (tset" when the cursor position is entered as a
new point by executing the
Ec*pc
command. The origin of the temporary rubberband line is
then updated to the new point and the process can be repeated.
NOTE: If the graphics cursor is not already on, activating the rubberband line function turns
on the graphics cursor.
Draw A Point At The Current Pen Position
Ec
*
pd
This command draws a point at the current pen position. The pen is set to up. This command is
ignored if encountered during an area fill sequence.
VECTORS
Graphics data is made up of vectors. Each vector is specified by the current graphic starting
point and an end point. The current graphic starting point is one of the following:
0,0 Initial starting point
Last point defined by the graphics cursor
(Ec*pc).
Last point defined by data in a draw or move command
(Ec
*
p f/g/h/i/j/k/l).
Graphic points are specified in one of the following formats:
ASCII Absolute
ASCII Incremental
ASCII Relocatable
Binary Absolute
Binary Incremental
Binary Short Incremental
Binary Relocatable
Ifno format is specified in the graphic command, ASCII absolute format is assumed. More than
one point can be given in a command. This minimizes communications overhead. Tables D-7,
D-8, and D-9 provide a reference for computing data bytes used in the various vector formats.
D-28
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