As I am approaching the study GR, I was wondering if there are softwares that allow a quick visualization of custom metrics, curvature, and particle motion even in the limited context of 2D space.

Playing with equations is fun, but it would be more fun if I could play with various parameters and see the outcome.

Obviously free would be better, but I am open to commercial programs.


2 Answers 2


I've been looking at this Java archive

General Relativity (GR) Package written by Wolfgang Christian, Mario Belloni, and Anne Cox

It includes a lot of simple programs about Newtonian mechanics, special relativity and general relativity, including the aforementioned GROrbits.

It doesn't permit custom metrics - you are limited to Schwarzschild (regular and rain co-ordinates) and Kerr black holes.

  • $\begingroup$ Can this package calculate Gravitational Time Dilatation at Kerr BH's? $\endgroup$
    – Randy Welt
    Apr 15, 2015 at 18:52

For particle/light motion in 2D space, my nomination would be GROrbits

It's free and requires a JVM to run, there is also a web start version for the brave ;)

Sorry but I've never found anything aimed at visualizing metrics or curvature (apart from plotting programs of course).


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