32leaves.net

3D graph visualization

After I’ve started playing arround with the JME, there actually was something useful to do with it: visualizing complex UML models in the three-dimensional space. When I say complex, I’m talking about roughly 250 packages (making the vertices) and about 1500 edges (depencies and containment relationships between the packages). So there is quite some data to visualize.
Unfortunately the model I used for testing (and which is the main use-case) is confidential, so I’m not allowed to post screenshots or a demo of it. But as I wanted to show this thing I had to come up with another data source. And here it comes, the WikiCircle. After some minor modifications, a script transforming the YAML dump into some neat XML format and an importer to read that XML file I got some neat graph working.
One can highlight a specific vertex and it’s edges accordingly. As the graph shown here is always considered to be directed, one can highlight the from and to edges. As the program was initially intended to visualize pretty complex models, it is capable of showing the containment hierarchy using the Y axis (the lower the depper in the containment graph). For the wikipedia data, the rule is: the lower, the more irrelevant.
Maybe some other day I’ll post an interactive demo of this (especially once it is really interactive, like browse Wikipedia in 3D space). Until that there are only screenshots:

Yet another game of life

I’ve always wanted to do something with Java and 3D. Therefore a few years ago, I bought myself a book called “Killer Game Programming in Java“, but honestly only came to like the fifth page. Doing OpenGL or similiar just sucks when don’t even know what a (spatial) vector or matrix is.

A few years later and another year of school later, I do know what those stuff is. And I’m not going to mess around with Java3D anymore. This time it’s the Java Monkey Engine. And just to get my hands on this thing I wrote a small Game of Life implementation. Nothing fancy, and actually it’s just a few GOLs stacked up to become a cube. But nice anyway.

You wanna see this thing? Click here then and hope you’ve got Java WebStart at your fingertips.

Ahh, I forgot the keybindings:

ESC Exit
G Add a glider
R Add some random population
C Clear the population (like kill everyone)
RETURN Let there be evolution

The screenshot is not as much fun as the real “product” is, as you can’t see things evolving.

Fork me on GitHub