public void ChangeSurfVelocity()
{
active = false;
//DaMichel: Avoid conflict between multiple vessels in physics range. We only want to show the speed of the active vessel.
if (FlightGlobals.ActiveVessel != _vessel)
{
return;
}
//DaMichel: Keep our fingers off of this also if there is no atmosphere (staticPressure <= 0)
if (FlightUIController.speedDisplayMode != FlightUIController.SpeedDisplayModes.Surface || _vessel.atmDensity <= 0)
{
return;
}
double unitConversion = 1;
string unitString = "m/s";
string caption;
if (unitMode == SurfaceVelUnit.KNOTS)
{
unitConversion = 1.943844492440604768413343347219;
unitString = "knots";
}
else if (unitMode == SurfaceVelUnit.KM_H)
{
unitConversion = 3.6;
unitString = "km/h";
}
else if (unitMode == SurfaceVelUnit.MPH)
{
unitConversion = 2.236936;
unitString = "mph";
}
if (velMode == SurfaceVelMode.TAS)
{
caption = "Surface";
velString = (_vessel.srfSpeed * unitConversion).ToString("F1") + unitString;
}
else
{
if (velMode == SurfaceVelMode.IAS)
{
caption = "IAS";
double densityRatio = (FARAeroUtil.GetCurrentDensity(_vessel.mainBody, _vessel.altitude, false) / 1.225);
double pressureRatio = FARAeroUtil.StagnationPressureCalc(_vessel.mach);
velString = (_vessel.srfSpeed * Math.Sqrt(densityRatio) * pressureRatio * unitConversion).ToString("F1") + unitString;
}
else if (velMode == SurfaceVelMode.EAS)
{
caption = "EAS";
double densityRatio = (FARAeroUtil.GetCurrentDensity(_vessel.mainBody, _vessel.altitude, false) / 1.225);
velString = (_vessel.srfSpeed * Math.Sqrt(densityRatio) * unitConversion).ToString("F1") + unitString;
}
else// if (velMode == SurfaceVelMode.MACH)
{
caption = "Mach";
velString = _vessel.mach.ToString("F3");
}
}
active = true;
FlightUIController UI = FlightUIController.fetch;
if (UI.spdCaption == null || UI.speed == null)
{
return;
}
UI.spdCaption.text = caption;
UI.speed.text = velString;
}