/// <summary>
///
/// </summary>
/// <param name="env"></param>
/// <returns></returns>
public static int ComputeQuadLevel(Envelope env)
{
double dx = env.Width;
double dy = env.Height;
double dMax = dx > dy ? dx : dy;
int level = DoubleBits.GetExponent(dMax) + 1;
return(level);
}
/// <summary>
/// Computes whether the interval [min, max] is effectively zero width.
/// I.e. the width of the interval is so much less than the
/// location of the interval that the midpoint of the interval cannot be
/// represented precisely.
/// </summary>
public static bool IsZeroWidth(double min, double max)
{
double width = max - min;
if (width == 0.0)
{
return(true);
}
double maxAbs = Math.Max(Math.Abs(min), Math.Abs(max));
double scaledInterval = width / maxAbs;
int level = DoubleBits.GetExponent(scaledInterval);
return(level <= MinBinaryExponent);
}