ROTATING CLASTS 1.3.2
(c) 2004-2005 Skylar L. Primm & Basil Tikoff
All rights reserved.
Contact: skylarp@geology.wisc.edu

This program simply displays four clasts of specified dimensions (major
and minor axes) and orientations (phi, the angle between the y-axis and
the major axis) and rotates them in progressive general shear according to
parameters set up by the user (pure shear, simple shear, and number of
steps). According to the user's preference, the clasts will either act as rigid
elliptical markers (Jeffery model rotation) or as passive material lines
(March model rotation).

To start a deformation, click the "New Deformation" button and input
your desired parameters. The program will display four clasts, along with
their aspect ratios (Rf) and orientations. Left-click anywhere in the window
to take the deformation forward one step, and right-click (or ctrl-click)
anywhere in the window to take the deformation backward one step. At
any time, you can click "New Deformation" again to start over.

During each step, the program will display each clast's current orientation
and the amount it rotated during the previous step. At any time, you can click
"New Deformation" again to start over.

Rotating Clasts should run on any computer with Java 1.4.2 or later installed,
but the author makes no guarantees. Furthermore, the author is not
responsible for any damage or loss of data caused by running Rotating
Clasts (though the odds of anything untoward happening are quite miniscule).

Feel free to use Rotating Clasts in a classroom setting and distribute it to
students and colleagues. (They are its intended audience, after all.) In any
other circumstances, do not distribute Rotating Clasts without the express
permission of the author.

The most recent version of Rotating Clasts can always be found at my website:
http://www.geology.wisc.edu/~skylarp/java.html

VERSION HISTORY
1.0 - Initial Release
1.1 - Added background information on the math involved
1.2 - Added the ability to step backwards through the deformation, fixed a few
math bugs, made some positive cosmetic changes
1.2.1 - VERY minor cosmetic change ("Ellipse" -> "Clast" in several places)
1.3 - When starting a new deformation, Rotating Clasts now retains the input values
from the previous deformation, making repeated simulations easier to perform
1.3.1 - Minor changes to help text
1.3.2 - Fixed a minor typo in help text