Re: Integer division

[Roberto Ierusalimschy <roberto@...>]

> How hard will it be to ensure that all the computations inside a given
> collection of functions are being done with floating point math?  I have a
> library for generating parametric paths, and I know all of its internal
> computations ought to be floating point -- both for reasons of speed and
> precision handling.  Will I need to explicitly convert any numeric
> arguments sent to that library to the float subtype?  Something like:
> 
> function path(x,y)
>    return internal_path( tofloat(x), tofloat(y) )
> end ?

Yes, or this:

function path(x,y)
   x = x/1; y = y/1;    -- ensure 'floatness'
   ...
end

Moreover, you should write all your constants with a decimal mark (0.0,
1.0, etc.), which may be a good idea even in current Lua when you are
coding floating-point computations.

-- Roberto