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10.1.1 PLOT HOUSTON
The PLOT HOUSTON command is used to create plots on the Houston Instrument
DMP range of pen plotters or any plotter that supports the DM/PL plotting
language or a compatible language.
Plots can be created at any size supported by the plotter and in up to 7
different colours.
Any hardfont styles used in the drawing are emulated using the available
DM/PL line styles. Hardfont line thickness is ignored, therefore colour
assignments should be used so that a larger diameter pen can be used to
plot thicker lines.
COMMAND FORMAT
#PLOT HOUSTON [modifiers] :Win x1 x2
or
#PLOT HOUSTON [modifiers] [CR]
If the command is terminated with a colon, a plot window can be defined by
entering two locations to define the extents of the window. If the command
is terminated with a return, the entire sheet will be plotted. The bottom
left corner of the window or sheet is used as the plot origin.
The plot will be created at a one to one scale with the sheet size and
units.
MODIFIERS
TO Requires the name of a file or device to direct all plot
commands. If this modifier is ommited, then the plot commands
will be directed to the device SER: - the serial port - as
the plotter is usually connected to this port. If the plotter
is connected to the parallel port then the command
#PLOT HOUSTON TO PAR:
should be used.
Plot commands can be directed to a disk file for later or
backround plotting.
PENSPEED The PENSPEED command is used to select the pen speed for the
plotter. Ink pens require a slow speed whereas felt tipped
pens can use a much faster plotting speed. The range of pen
speed values available is 1 - 127 measured in cm/sec. Refer
to the plotter operator's manual for its speed capabilities.
SCALE Can be used to alter the scale of the plot. If the modifier
is omitted, then a scale of 1.0 will be used.
OFFSET The OFFSET command can be used to specify an xy offset for
the origin of the plot. The modifier requires 2 values
separated by a comma, these are the x and y values at which
to offset the plot origin. The values must be entered in
millimetres. For example:
#PLOT HOUSTON OFFSET 30,60
Will offset the origin of the plot by 30 millimetres in the
x direction and 60 millimetres in the y direction.
Negative values can be used.
ROTATE The ROTATE modifier can be used to specify that the drawing
should be rotated through 90 degrees prior to being plotted.
SHADEPITCH Used to specify the vertical distance between horizontal
lines used to emulate a colour filled polygon. The value
must be entered in millimetres. If this modifier is omitted,
a value of 0.5 mm is used.
NOFILL The NOFILL modifier can be used to inhibit any filled areas
of a drawing being plotted.
MONO The MONO modifier can be used to create a single colour plot.
All entities will be plotted using pen 1.