Пример #1
0
 /**
  * @param lon0
  * @param lat0
  * @param variation
  */
 public void updateStationWithLocation(double lon0, double lat0, double variation) {
   Projection p = new Projection(lon, lat, lon0, lat0);
   station +=
       "("
           + Math.round(p.getDistance())
           + Preferences.distanceConversionUnit
           + " "
           + p.getGeneralDirectionFrom(variation)
           + ")";
 }
Пример #2
0
 /** @return */
 private String getPriorityMessage() {
   if (mPointProjection != null) {
     String priorityMessage =
         Helper.makeLine2(
             mPointProjection.getDistance(),
             Preferences.distanceConversionUnit,
             mPointProjection.getGeneralDirectionFrom(mGpsParams.getDeclinition()),
             mPointProjection.getBearing(),
             mGpsParams.getDeclinition());
     return priorityMessage;
   }
   return null;
 }
Пример #3
0
  /**
   * Update the current speed, lat, lon, that will update ETA, distance and bearing to the
   * destination
   *
   * @param params
   */
  public void updateTo(GpsParams params) {

    /*
     */
    double mLon = params.getLongitude();
    double mLat = params.getLatitude();
    double speed = params.getSpeed();
    mDeclination = params.getDeclinition();

    if (!mFound) {
      return;
    }

    if (!mInited) {
      mLonInit = mLon;
      mLatInit = mLat;
      mInited = true;
    }

    /*
     * Project and find distance
     */
    Projection p = new Projection(mLon, mLat, mLond, mLatd);

    mDistance = p.getDistance();

    mBearing = p.getBearing();

    // in flying mode, calculate time based on ground speed from GPS
    mGroundSpeed = speed;
    mWca = 0;
    mCrs = mBearing;
    if (mPref.isSimulationMode()) {
      double ws = 0;
      double wd = 0;
      if (mWinds != null) {
        double winds[] = mWinds.getWindAtAltitude(params.getAltitude());
        ws = winds[0];
        wd = winds[1];
      }

      // in sim mode, do planning with winds
      speed = mPref.getAircraftTAS(); // in sim mode, use preferred TAS
      // from aviation formulary
      double hd = mBearing;
      mGroundSpeed =
          Math.sqrt(
              ws * ws + speed * speed - 2 * ws * speed * Math.cos((hd - wd) * Math.PI / 180.0));
      mWca =
          -Math.toDegrees(
              Math.atan2(
                  ws * Math.sin((hd - wd) * Math.PI / 180.0),
                  speed - ws * Math.cos((hd - wd) * Math.PI / 180.0)));
      mCrs = (hd + mWca + 360) % 360;
    } else if (mPref.useBearingForETEA() && (!mService.getPlan().isActive())) {
      // This is just when we have a destination set and no plan is active
      // We can't assume that we are heading DIRECTLY for the destination, so
      // we need to figure out the multiply factor by taking the COS of the difference
      // between the bearing and the heading.
      double angDif = Helper.angularDifference(params.getBearing(), mBearing);
      double xFactor = 1;

      // If the difference is 90 or greater, then ETE means nothing as we are not
      // closing on the target
      if (angDif < 90) {
        // Calculate the actual relative speed closing on the target
        xFactor = Math.cos(angDif * Math.PI / 180);
      }
      mGroundSpeed *= xFactor;
    }

    /*
     * ETA when speed != 0
     */
    mEte = Helper.calculateEte(mDistance, mGroundSpeed, 0, true);
    if (mGroundSpeed == 0) {
      mEteSec = Long.MAX_VALUE;
      mFuelGallons = Float.MAX_VALUE;
      mFuel = "-.-";
    } else {
      mEteSec = (long) (mDistance / mGroundSpeed * 3600);
      mFuelGallons = (float) mEteSec / 3600 * mPref.getFuelBurn();
      mFuel = String.valueOf((float) Math.round(mFuelGallons * 10.f) / 10.f);
    }

    // Calculate the time of arrival at our destination. We SHOULD be taking in to account
    // the timezone at that location
    mEta = Helper.calculateEta(Calendar.getInstance().getTimeZone(), mDistance, mGroundSpeed);
  }