void
GlidePolarTest::TestBallast()
{
polar.SetBallast(fixed(0.25));
ok1(equals(polar.GetBallastLitres(), 25));
ok1(equals(polar.GetBallast(), 0.25));
polar.SetBallastLitres(fixed(50));
ok1(equals(polar.GetBallastLitres(), 50));
ok1(equals(polar.GetBallast(), 0.5));
ok1(equals(polar.GetTotalMass(), 368));
ok1(equals(polar.GetWingLoading(), 37.551020408));
ok1(polar.HasBallast());
fixed loading_factor = sqrt(polar.GetTotalMass() / polar.reference_mass);
ok1(equals(polar.polar.a, polar.ideal_polar.a / loading_factor));
ok1(equals(polar.polar.b, polar.ideal_polar.b));
ok1(equals(polar.polar.c, polar.ideal_polar.c * loading_factor));
ok1(equals(polar.SinkRate(Units::ToSysUnit(fixed(80), Unit::KILOMETER_PER_HOUR)),
0.640739));
ok1(equals(polar.SinkRate(Units::ToSysUnit(fixed(120), Unit::KILOMETER_PER_HOUR)),
0.928976));
ok1(equals(polar.SinkRate(Units::ToSysUnit(fixed(160), Unit::KILOMETER_PER_HOUR)),
1.722908));
ok1(equals(polar.GetVMin(), 21.44464));
ok1(equals(polar.GetVBestLD(), 27.78703));
polar.SetBallast(fixed(0));
ok1(!polar.HasBallast());
}
void
RenderGlidePolarInfo(Canvas &canvas, const PixelRect rc,
const ChartLook &chart_look,
const GlidePolar &glide_polar)
{
canvas.Select(chart_look.label_font);
StaticString<80> text;
StaticString<20> value;
canvas.SetBackgroundTransparent();
FormatUserMass(glide_polar.GetTotalMass(), value.buffer(), true);
int left = rc.left*0.8 + rc.right*0.2;
text.Format(_T("%s: %s"), _("Mass"), value.c_str());
canvas.DrawText(left,
rc.bottom - Layout::Scale(50),
text);
double wl = glide_polar.GetWingLoading();
if (wl != 0) {
FormatUserWingLoading(wl, value.buffer(), true);
text.Format(_T("%s: %s"), _("Wing loading"), value.c_str());
canvas.DrawText(left,
rc.bottom - Layout::Scale(35),
text);
}
}
void
GlidePolarTest::TestBasic()
{
polar.Update();
ok1(equals(polar.polar.a, polar.ideal_polar.a));
ok1(equals(polar.polar.b, polar.ideal_polar.b));
ok1(equals(polar.polar.c, polar.ideal_polar.c));
ok1(equals(polar.SinkRate(Units::ToSysUnit(fixed(80), Unit::KILOMETER_PER_HOUR)), 0.606));
ok1(equals(polar.SinkRate(Units::ToSysUnit(fixed(120), Unit::KILOMETER_PER_HOUR)), 0.99));
ok1(equals(polar.SinkRate(Units::ToSysUnit(fixed(160), Unit::KILOMETER_PER_HOUR)), 1.918));
ok1(equals(polar.GetSMax(), polar.SinkRate(polar.GetVMax())));
ok1(equals(polar.GetVMin(), 19.934640523));
ok1(equals(polar.GetSMin(), polar.SinkRate(polar.GetVMin())));
ok1(equals(polar.GetVTakeoff(), polar.GetVMin() / 2));
ok1(equals(polar.GetVBestLD(), 25.830434162));
ok1(equals(polar.GetSBestLD(), polar.SinkRate(polar.GetVBestLD())));
ok1(equals(polar.GetBestLD(), polar.GetVBestLD() / polar.GetSBestLD()));
ok1(equals(polar.GetTotalMass(), 318));
ok1(equals(polar.GetWingLoading(), 32.448979592));
ok1(equals(polar.GetBallast(), 0));
ok1(equals(polar.GetBallastLitres(), 0));
ok1(polar.IsBallastable());
ok1(!polar.HasBallast());
}
