Java application that simulates spheres moving... - repost

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Project Budget (USD)
$30 - $50

Project Description:
Project 1 (I want my project to be created with Java and using the jMonkeyEngine SDK 3, that can be downloaded in the following web site:

Create a Java or C# application that simulates a minimum of 3 spheres moving through a frictionless environment with gravity. The environment should be a confined cube area for the spheres to collide and respond to collisions. The application must display the graphical positions of the spheres in real time (i.e. show the spheres moving smoothly). In addition, the 3D vector position of each sphere should be saved to a plain text file once every second for future plotting and simulation replay. The initial position and velocity for each sphere should be random, but constrained to a reasonable range, each time the application is run. The camera should be positioned to see the entire cube environment, but it does not have to be adjustable by the user.

What to submit:

All the source code for your game.
A compiled JAR or executable file.
Test suite data and description along with the results for the test.
A text file briefly describing how to run and play your game.

All of the above should be attached to your assignment as a single *.zip file.

Skills required:
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