High Frontier game progress report

Although I have other projects I should be working on, this one has
captured my imagination, and I haven't been able to stop myself. So, in
the last week or so I've made a decent start on this game. You can see
a screen shot here:

http://strout.net/temp/HighFrontier0.png

This is the "design" mode, where you build up the structure of your
colony by snapping and configuring parts from a parts library. Right
now these parts are just simple shapes; high on the to-do list is adding
a torus, as well as more configuration for the ones here (such as
defining the roundness of cylinder endcaps).

The app then calculates and reports the total mass of your habitat, as
well as more detailed statistics for the selected part (shown in blue).
This currently includes the area and mass of the shell, the
pressurized volume, the mass of air needed, and so on.

Parts snap together and can be unsnapped in a very intuitive way, making
it rather fun (IMHO) to play with already. It will of course be much
more satisfying when we are computing more human-relevant values, such
as gravity, cost, and max population it can reasonably support.

Al Globus has kindly offered to be a technical advisor. I'll be getting
him a build soon (probably via the web, using the Unity plugin, so that
he doesn't have to keep downloading and unpacking files every time I
update the code). If anybody else would like to participate in these
early, pre-public-release days, just let me know. Feedback based merely
on the screenshot and comments here is of course also welcome!

Cheers,
- Joe