Replace ZERO_TOLERANCE

[asmaloney]

Describe the feature you would like

We had discussed replacing ZERO_TOLERANCE with the old FLT_EPSILON.

Maybe what we should provide here is inline methods instead. ZERO_TOLERANCE is mostly used for comparison - "is this less than zero-ish?" or "is this greater than zero-ish?"

This would make it a bit more readable and eliminate casting issues and warnings.

if (range < CCLib::ZERO_TOLERANCE)

becomes:

if ( CCLib::lessThanEpsilon( range ) )

This might be implemented like this:

inline bool	lessThanEpsilon( double x )
{
   return x < std::numeric_limits<double>::epsilon();
}

inline bool	lessThanEpsilon( float x )
{
   return x < std::numeric_limits<float>::epsilon();
}

[dgirardeau]

Ok, then simply a template version?

template inline bool lessThanEpsilon( T x )
{
return x < std::numeric_limits::epsilon();
}

[asmaloney]

I considered that, but wanted to avoid templates as much as possible. I think it's overkill for this. Just causes longer compile times for no real return.

[asmaloney]

This was rolled into the plan for #20