A java physics simulator for simulating the force of gravity. Authors: Frederick Ceder and Joakim Uddholm

== Requirements ==

1. Java 1.7 (JRE)
2. Ant

== Building == The project was built in the eclipse IDE but can be compiled by ant if you wish. Either run the make command or the ant command and it will compile the project with the correct.

== Running == The main programs that might be interesting to you as a tester are:

• 2D visualiser
• the ResultGenerator.

Available runnable scripts:

• 2dvisualiser
• grav_single
• grav_multi
• barneshut_single
• barneshut_multi

== Input parameters ==

./2dvisualiser numBodies numSteps far numThreads collision width height barnes ./grav_single numBodies numSteps far numThreads collision ./grav_multi numBodies numSteps far numThreads collision ./barneshut_single numBodies numSteps far numThreads collision ./barneshut_multi numBodies numSteps far numThreads collision

numBodies and numSteps are mandatory, the rest is optional and will fallback to default values if no others are entered.

Defaults: far = 0.5 numThreads = 1 or 2 (Depending on if sequential run or multithreaded) collision = true width = 640 height = 480 barnes = false

Definitions:

far 		:= Granularity value in barnes-hut algorithm. Does nothing for other implementations. 

numThreads 	:= The number of worker threads used. Does nothing for a sequential run.

collision 	:= Set if collision physics should be activated or not.

width		:= Width of the window for the GUI.

height		:= Width of the window for the GUI.

barnes		:= Set gravitational force to run with a Barnes-Hut implementation.