/// <summary>
/// Determines whether the given proportion of the year falls within the range indicated for
/// a <paramref name="position"/> in a <paramref name="region"/>.
/// </summary>
/// <param name="region">The mapped region.</param>
/// <param name="planet">The mapped planet.</param>
/// <param name="position">A position relative to the center of <paramref
/// name="region"/>.</param>
/// <param name="ranges">A set of ranges.</param>
/// <param name="proportionOfYear">
/// The proportion of the year, starting and ending with midwinter, at which the calculation
/// is to be performed.
/// </param>
/// <param name="equalArea">
/// If <see langword="true"/> the projection will be a cylindrical equal-area projection.
/// Otherwise, an equirectangular projection will be used.
/// </param>
/// <returns><see langword="true"/> if the given proportion of the year falls within the
/// range indicated for a <paramref name="position"/> in a <paramref name="region"/>;
/// otherwise <see langword="false"/>.</returns>
public static bool GetAnnualRangeIsPositiveAtTimeAndLocalPosition(
this SurfaceRegion region,
Planetoid planet,
Vector3 position,
FloatRange[,] ranges,
float proportionOfYear,
bool equalArea = false)
{
var(x, y) = region.GetProjectionFromLocalPosition(
planet,
position,
ranges.GetLength(0),
ranges.GetLength(1),
equalArea);
return(SurfaceMap.GetAnnualRangeIsPositiveAtTime(ranges[x, y], proportionOfYear));
}
/// <summary>
/// Determines whether the given <paramref name="moment"/> falls within the range indicated.
/// </summary>
/// <param name="planet">The mapped planet.</param>
/// <param name="range">The range being interpolated.</param>
/// <param name="moment">The time at which the determination is to be performed.</param>
/// <returns><see langword="true"/> if the range indicates a positive result for the given
/// <paramref name="moment"/>; otherwise <see langword="false"/>.</returns>
public static bool GetAnnualRangeIsPositiveAtTime(
this Planetoid planet,
FloatRange range,
Instant moment) => SurfaceMap.GetAnnualRangeIsPositiveAtTime(range, (float)planet.GetProportionOfYearAtTime(moment));