I thought I had posted this earlier, but it turns out I hadn’t. So, it’s here now

Meteoroids

Meteoroids is a simple game (the premise being an homage to the classic Asteroids-based titles), programmed in Processing. Audio is provided via ChucK, and input is provided by a Nintendo Wiimote via OSC commands generated from an extension of Darwiin Remote.

To explain more, here’s a short video

Due to minor demand, the code is also available: BigNum source.

Please note that I haven’t actually touched the code since it was first written. I’m sure there’s some things that don’t work properly. If you’re doing anything big with this you probably want to write some ‘destructive’ update functions for adding, etc. At the moment every time you add, subtract, etc, a completely new BigInt is returned. To make it faster you’d want to just update the number in-place.

Original content…

I’ve created a simple wrapper for GMP. At the moment only BigInts are implemented, but I expect to have BigRationals and BigFloats coming along soon enough. (Edit: this never happened.)

Usage

I think this is very close to as-you’d-expect. The only minor thing that might come as a surprise is that BigInts aren’t value types; since they need destructors, they can’t be. The rest is fairly straightforward:

static void Main(string[] args) {
    BigInt n;
    for (ulong i = 100; i <= 999; i++) {
        n = BigInt.Factorial(i);
        Console.WriteLine(n);
    }
    Console.ReadLine();
}

This code executes with sub 5-second times, which I’m pretty pleased with. I’m not sure what kind of performance decrease you get through using GMP under managed code.

Caveats

• Consider this alpha software
• The included GMP DLL is compiled with none of the magical assembly they provide. If you want to, you can compile it yourself with all this enabled, and you should be able to just use it as a drop-in replacement.

Download

Available here: BigNum library. Documentation is available.