C++ (Cpp) LeastSquares::GetAverageY示例

示例#1

文件： WaveComputer.cpp 项目： Advi42/XCSoar

/**
 * Convert a #LeastSquares to a #WaveInfo.  Returns
 * WaveInfo::Undefined() if there is no valid result in the
 * #LeastSquares instance.
 */
gcc_pure
static WaveInfo
GetWaveInfo(const LeastSquares &ls, const FlatProjection &projection,
            double time)
{
  if (!ls.HasResult())
    return WaveInfo::Undefined();

  const FlatPoint flat_location(ls.GetMiddleX(), ls.GetAverageY());
  const GeoPoint location(projection.Unproject(flat_location));

  const GeoPoint a(projection.Unproject(FlatPoint(ls.GetMinX(),
                                                  ls.GetYAtMinX())));
  const GeoPoint b(projection.Unproject(FlatPoint(ls.GetMaxX(),
                                                  ls.GetYAtMaxX())));

  Angle bearing = a.Bearing(b);
  Angle normal = (bearing + Angle::QuarterCircle()).AsBearing();

  return {location, a, b, normal, time};
}