/// <summary> /// /// </summary> /// <param name="env"></param> /// <returns></returns> public static int ComputeQuadLevel(IEnvelope 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); }