Yeah, floats would be faster than fixed point in most cases, unless you're doing a lot of float -> integer conversions, which it doesn't appear you'd be doing.

Although, most of the work you'd be doing would be subtraction and addition I'd presume, and integer addition/subtraction is plenty fast. Who knows, just use:

typedef MyFloat float;

Then write the program and get it to work, benchmark.. then change the typedef to...

typedef MyFloat Fixed16_S;

Program should still work the same, benchmark and see which was faster. It's not that hard to test out because both float types are treated the same in code, so no changes should have to be made to test them!

--- Edit ---
By the way, in your structs/classes, I mean to use MyFloat as the data type instead of float or Fixed16_S, so it's as simple as changing your typedef to change all the types instead of doing it manually. Once you find the most efficient method, stick to it .

[edited by - Ready4Dis on July 6, 2003 9:17:13 AM]