Authors : Syd Hall, Roeli Olthof-Hazekamp, Howard Flack, James Hester & Ursula Bartsch
Contact: Syd Hall, Crystallography Centre, University of Western Australia, Nedlands 6907, Australia
PLOTX generates data appropriate for the different graphical protocols (e.g. X11, HPGL, PostScript) for use with local plotting devices. A number of new options for setting the postscript papersize have been added.
The positive x-axis of a plot is taken as horizontal from left to right, and the positive y-axis is taken as vertical from bottom to top. Default frame dimensions and resolutions for the different devices are defined for each device at implementation time. They may be changed with the params line. High resolution values (i.e. small values entered in field 7) may result in smoother plots but will run slowly. To magnify or contract a plot, or to translate a plot within the given frame, the user may define the scale factor and/or plot centre manually.
The plot command bdf generated by some programs contains subject indices that are used to produce colour plots. This facility allows different subjects, such as atoms, bonds, numbers, characters and contours, to be plotted in different colours. Default colours are set within PLOTX but the user can specify his own colours using the color line. For atoms up to 16 different colours are allowed. Options available on the color line are:
The format of postscript output has been modified
significantly to make it more amenable to manual editing.
It has also been modified to conform to the ADOBE
postscript Document Structuring Conventions for multi-page
documents. This permits the page selection methods of
postscript previewers to be used to step through multi-page
plots, such as multi-layered contour diagrams. To support
these modifications a postscript prolog file
xtalps is supplied with
xtal and is included in every postscript output plot. For
including single page XTAL postscript images in other
image/manipulation packages it may be necessary to edit the
first line of the
XFIG is free software for interactively editing vector graphics under X11. XFIG3.2can be obtained from http://www-epb.lbl.gov/xfig/. Xtal is not associated with the XFIG project in any way, we merely recommend their software as a useful additional graphical editting tool for post processing Xtal plot files.