Julia Fractal Drawing Program

This program is a specialized tool for the study of various dynamical systems. It was developed by Rich Stankewitz of the Ball State University (BSU) Mathematical Sciences department.

Julia is designed to draw the following types of sets in the complex plane:

1. Julia sets of a function.
2. Julia sets of rational semigroups.
3. Attractor sets of an Iterated Function System (IFS).
4. Iterates of a seed value under any of the allowable map types.
5. Postcritical sets (of finite order) of any function or semigroup of the allowable map types.
6. Forward and Inverse images (using any of the allowable map types) of the above sets or any sets imported into Julia.

Requirements

Julia will run on systems with the following:

• Java Runtime Environment version 6 or greater (JRE 8 recommended)
• An OpenGL graphics card.
• Windows, Mac OS X, Linux, or Solaris operating systems
• To draw large sets, at least 2gb of RAM is needed.

Installation and Use

Julia can be launched as a Java Web Start Application:

• Julia - v2.2.0 (stable)

Help

Please refer to the Julia Wiki for information about how to use Julia.

Development

Development requirements:

• Java SE Development Kit 8 or higher
• Groovy 2.4.4 or higher
• Gradle 2.6 or higher
• IntelliJ IDEA (recommended IDE)

Build

To build Julia run:

gradle build

Release

To release a new version of Julia, in addition to building the project you need to sign the jar files with a certificate. Rich Stankewitz keeps the BSU Math department's signing key.

Create a file in this repo named keystore.properties with the following:

storepass=the key store password goes here
storetype=pkcs12
keystore=D:\\path\\to\\the\\cert.p12
alias=the correct certificate alias
tsaurl=http://the.real.timestamp.authority.example.com

Rich Stankewitz has the correct values for the keystore.properties file. Once that file is created you can sign the jars and generate the jnlp content with:

gradle createWebstart

Then the build/jnlp directory will contain

• julia.jnlp - the file to launch Julia via Java Web Start
• lib/*.jar - the signed jar files for Julia and its dependencies

These files should then be committed on the bsumath/julia@gh-pages branch.

Contributors

Initial development of Julia was done by Team Motivity as a Software Engineering project for the BSU Computer Science department. Team Motivity was:

• Rich Stankewitz
• Wendy Conatser
• Trey Butz
• Yun Li
• Kristopher Hart

Further development of Julia has been done by:

• Ben Dean
• Wendy Conatser
• Sida Qiu

License

Copyright © 2007-2016 Ball State University

Julia is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

Julia is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Julia. If not, see http://www.gnu.org/licenses/.