case 0: a = 1.0f;

Gotcha. Hidden on the same line! (Everyone has their own style)

Anyway, thanks for actually posting code for this suggestion, something I didn't take the time for.

Very intresting approaches, i may try them this weekend or next week, thank you people.

Any other observation/recomendation you guys may add?

Will be posting here the results and/or doubts than can come when i start to test this approaches.

Thank you