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- About MacAtoms 3.3.0
-
- MacAtoms is a program for making realistic pictures of atomic
- structures. The program is designed to give you interactive control over
- the parameters that determine the appearance of the picture. For
- example, you can change the viewpoint by just moving the mouse and
- observing the effect. You can also change the radius and color of groups
- of atoms by moving the mouse.
-
- MacAtoms lets you select atoms or groups of atoms using the usual point and
- click technique. It also lets you select atoms based on various criteria,
- such as the type of atom or the distance between an atom and its nearest
- neighbors. The atoms that are selected can be moved independently of the
- other atoms. You can use this feature to make stereo pairs that help you
- visualize your structure. You can hide the atoms that are selected, or move
- them aside in order to see inside a structure.
-
- MacAtoms lets you combine selected atoms into groups and then combine
- the groups to make more complex groups. You can use this to build
- molecules out of simpler components or to organize the atoms so that
- clicking on one atom of a group causes the entire group to be selected.
-
- MacAtoms supports multiple windows, and it is possible to cut and paste
- atoms between windows. The program takes its data for each window from a
- simple text file that describes the atom positions, radii, and colors.
- Each window can have a separate data file. You can use these features in
- many ways. For example, you can compare similar data sets by displaying
- each one in a different window. Or, you can have one window that
- contains a library of useful molecules, and another window that contains
- a complex structure built from the molecules that you copy from the first
- window.
-
- MacAtoms places essentially no limits on the number of windows, the
- number of atom types, the number of atoms of each type, or the number of
- groups of atoms, beyond the obvious limitations imposed by memory. While
- it is at its best on the Macintosh II line of computers, the program can
- also generate realistic pictures on older Macintoshes that do not
- support gray scale and color displays, such as the Macintosh 512K or SE.
- However you will be a bit constrained for memory on the smaller
- machines.
-
- MacAtoms can produce hardcopy prints on any printer, including color
- printers. The print quality may not be very satisfactory on low
- resolution printers such as the ImageWriter, but on most printers the
- images are quite realistic. MacAtoms can also drive several other types
- of recording devices, such as video tape recorders and optical disks.
- MacAtoms can be made to run freely, reading data from a data file and
- plotting the results on a recording device, all without human
- intervention. You can use this technique to make movies.
-
- The manual for MacAtoms was written using Microsoft Word. You should also
- be able to read the manual in other word processors provided they can read
- Microsoft Word files. To do that, start your word processor, and then
- select the Open menu item. Look for an Options button in the dialog that
- lets you select what type of document to open.
-
- This version of MacAtoms is being offered as "Freeware", which means you
- don't have to pay me for it unless you just want to. However, the
- program is not in the public domain, and I retain all rights to it. I am
- encouraging users to distribute the program widely, subject to a few
- restrictions. If you do use MacAtoms, send me a postcard so I can
- keep you up to date when new versions come out.
-
- Version 3.3.0 is primarily a feature release. Some of the new features
- include selecting atoms by type, by distance from the origin, and by
- distance to near neighbors; hiding and unhiding atoms; creating new atoms
- and atom types interactively; undoing and repeating most commands; and many
- others. There are a few bugfixes too. For more information about changes in
- this version, read the release notes in the manual.
-
-
- Hilary D. Jones
- 364 Princeton Ln.
- Danville CA 94526
- 510-837-8958
-
- Sandia National Laboratories
- PO Box 969, Department 1952
- Livermore CA 94551-0969
- 510-294-2892
-
- CompuServe: 74666,167
- ARPANET: hilary@california.sandia.gov
-