Re: Fixed vs float and precision and conversions

[Shark8 <onewingedshark@gmail.com>]

On Wednesday, July 8, 2020 at 12:08:16 PM UTC-6, björn lundin wrote:
> 
> hmm no. valuies in global_odds_table are fixed_type
>    Global_Odds_Table : array(Tics_Type'Range) of Fixed_Type := (

Except you don't *have*, in the things you are getting [from JSON], fixed-point.
You are getting IEEE-float, as a consequence of JSON's definition.
In order to find the proper values for a non-'Round-able you have to compare Floatingpoints to the acceptable-values in the table: for simplicity this means using the table-values as floats. [Conceptually they are universal-numbers.]

By putting the global-table in the convert function, as an array of floats, I got rid of the need for Tics_Type, as well as simplifying the translation (if-needed).

Take a look at the conversion function you provided, and the one I provided; there are two big differences: mine will return a valid Odds value, and that value will be that value from the table which is the closest value to the input-float.