示例#1
0
void
ChartRenderer::ScaleXFromData(const LeastSquares &lsdata)
{
  if (lsdata.IsEmpty())
    return;

  if (x.unscaled) {
    x.min = lsdata.GetMinX();
    x.max = lsdata.GetMaxX();
    x.unscaled = false;
  } else {
    x.min = std::min(x.min, lsdata.GetMinX());
    x.max = std::max(x.max, lsdata.GetMaxX());
  }

  x.scale = (x.max - x.min);
  if (x.scale > 0)
    x.scale = (rc.right - rc.left - padding_left) / x.scale;
}
示例#2
0
void
ChartRenderer::DrawTrend(const LeastSquares &lsdata, ChartLook::Style style)
{
  if (!lsdata.HasResult())
    return;

  if (x.unscaled || y.unscaled)
    return;

  auto xmin = lsdata.GetMinX();
  auto xmax = lsdata.GetMaxX();
  auto ymin = lsdata.GetYAtMinX();
  auto ymax = lsdata.GetYAtMaxX();

  DrawLine(xmin, ymin, xmax, ymax, look.GetPen(style));
}
示例#3
0
/**
 * 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};
}