Spring RTS Engine

So I need some visual graphic widgets, not sure if they're even possible.

What I want is basically stuff like this:



Replacing various drawn circles such as radar and weapons range.

However I want mine to have a faint grid pattern "filling":



That's just a rough sketch; I want hexagonal grid pattern, not square.

What's worse is I'd like them to overlap nicely, either merging or cancelling each other out or whathaveyou, particularly since it uses semi-transparency and several overlapping might lead to hideousness. But is this even possible to do in a way that doesn't look horrendous when two grids overlap?

This might do what you want. You can see it in evo by simply building a powerplant.

http://svn.evolutionrts.info/evolutiond ... _range.lua

Supports animations in customparams a la:
Or you can just leave it as one frame.