Relocatable Origin - HP 262SA Reference Manual

Graphics
LIFT/LOWER BOUNDARY PEN
Lift Boundary Pen:
Ec
*
pu
Lower Boundary Pen:
Ec
*
pv
If the boundary pen has been enabled by the
Ec
*
m 0 h
command (above), the pen may be
((lifted" so that the edges of the filled area are the same pattern as the interior. When the pen is
((lowered", the boundary of the filled area is a solid white line. The Lower Boundary Pen
command is executed only if the boundary pen has first been enabled.
0,2000
2000,2000
Display
0,0
1000,1389
1000, 1000
1511, 1389
1511, 1000
Relocatable
Origin =
-1000, -1000 \
I
~(
2000,0
Figure D-12. Relocatable Origin
RELOCATABLE ORIGIN
The relocatable origin allows you to use one set of data and drawing commands to display a
figure at several different positions on the screen. (See the resistor example under ASCII
Relocatable Format.)
You can also display portions of a figure that is too large to fit on the screen. You can create a
((window" that can be positioned to display any 512 by 390 unit portion of the figure. The value
of the relocatable origin is subtracted from the relocatable data to obtain the coordinates used
to draw the data. Figure D-12 illustrates the effect of a Relocatable Origin on the display.
This technique eliminates the need to check boundary conditions or compute new data in order
to display the desired portion of the figure. Simply set the relocatable origin to the proper value
to display the desired portion of the figure and then send the unchanged figure data to the
terminal. The terminal will then automatically select and adjust the ((window" data.
D-23