Converting floating point to fixed point

Question

In C++, what\'s the generic way to convert any floating point value (float) to fixed point (int, 16:16 or 24:8)?

EDIT: For clarification, fixed-poin

Answer 1

I gave the answer to the guy that wrote the best answer, but I really used a related questions code that points here.

It used templates and was easy to ditch dependencies on the boost lib.