/**
* Return the maximum level such that the metric is at least the given
* value, or zero if there is no such level. For example,
* S2.kMinWidth.GetMaxLevel(0.1) returns the maximum level such that all
* cells have a minimum width of 0.1 or larger. The return value is always a
* valid level.
*/
public int GetMaxLevel(double value)
{
if (value <= 0)
{
return(S2CellId.MaxLevel);
}
// This code is equivalent to computing a floating-point "level"
// value and rounding down.
var exponent = S2.Exp((1 << _dim) * _deriv / value);
var level = Math.Max(0,
Math.Min(S2CellId.MaxLevel, ((exponent - 1) >> (_dim - 1))));
// assert (level == 0 || getValue(level) >= value);
// assert (level == S2CellId.MAX_LEVEL || getValue(level + 1) < value);
return(level);
}
