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PostScript


Sabrina can write a PostScript (.ps) file containing the graphics on the screen. There are 2 types of graphics:

Write PostScript
When checked, Sabrina's graphics are written to the current PostScript file. A raster Dump is made automatically following a ray traced Color, Etch, or 2-D Slice picture. Vector graphics operations are written as they are executed.

The Write PostScript mode should be disabled before the file is Printed.

PostScript Options...
Show the PostScript Options Dialog described next.
Write PostScript
Performs the same function as Write PostScript on the File Menu. Apply must be selected for the mode change to take effect.

Compress Bitmaps
When checked, the PostScript raster bitmaps are compressed using run-length encoding. Compessed bitmaps are smaller, sometimes significantly, than uncompressed bitmaps. No data is lost in the compression. The use of compressed bitmaps is highly recommended.

File
The text field shows the name of current PostScript file that is open or will be opened when Write PostScript is enabled. A file name can be tpyed in the field or one chosen in the file selection dialog that is shown by the Browse button.

The file name must be 64 characters or less.

If a file other than the default sabplot.ps (in any directory) is chosen with the file dialog, Sabrina will ask if it is OK to overwrite an existing file.

The file name is restored when Sabrina is restarted without asking if it is OK to overwrite an existing file.

Text
Specify the Size in points and the Font used for text in the PostScript file. The settings apply to both text on the graph (text labels and color legend bars) and the Bottom Labels below the graph. The graphics text is in the same color as on the graph; the Bottom Labels are always black. It is the user's responsibility to ensure that the Font is supported by the target PostScript printer or viewer. The Font need not be the same as the screen font.

Bottom Labels
The Bottom Labels appear below the picture. They are entered in the input window following the Post Label command. A '.' (period) ends the label input. As many label lines can by entered as will fit on the page. The labels can be Centered or Left justified. The distance between the label lines is given by the Line Spacing value.

Vector Graphics Options
Vector graphics can be written in Color, have their color converted to a Gray Scale, or, with the B/W setting, always written as black.

When the Show SubWindows box is checked and the graphics window is divided in subwindows, multiple line drawings will appear on the PostScript page. The maximum number than can appear on a single page is the larger of the number of subwindows in which a drawing is made and the value in the SubWindows per Page box.

The ShowSubWindows setting has a similar effect for ray traced images. When unchecked, each ray traced subwindow is written to a single PostScript page. When checked, the entire graphics window is dumped after each image.

Caution: vector graphics, such as particle tracks, drawn over ray traced images will not be sized correctly when Show SubWindows is checked. The use of the SubWindow mode is discouraged in such situations.

Line Width Multiplier
The value multiplies the line width of PostScript lines. Smaller widths may be desired, for example, when a plot contains lots of particle tracks.

Height Align Factor
The value affects the vertical displacement of graphics text for which a vertical alignment of Top or Center is specified. Top aligned text is moved down by P x F, where P is the Text Size and F is the Height Align Factor. For center aligned text, the displacment is 1/2 of the top aligned displacement.

Dump
Write a Dump of the Graphics Window (or current subwindow if the Show SubWindow setting is checked.) in raster PostScript format. The file will produce color plots on color PostScript printers and will print a greyscale image on monochrome printers. If a Dump is made when the PostScript Mode is OFF, Dump will open the PostScript file (using either the default or the user-specified name), dump the image, and close the file, leaving PostScript in the OFF mode.

PostScript Commands