Merge pull request #2416 from SiboVG/issue-2178

[#2178] Add South/West unit for latitude/longitude

core/resources/l10n/messages.properties

@@ -374,6 +374,8 @@ pref.dlg.lbl.SecondaryStability.ttip = Select the stability unit that will be di
 pref.dlg.checkbox.DisplaySecondaryStability = Display secondary stability unit
 pref.dlg.checkbox.DisplaySecondaryStability.ttip = If checked, a secondary stability unit will be displayed in the rocket design view.
 pref.dlg.lbl.FlightTime = Flight time:
+pref.dlg.lbl.Latitude = Latitude:
+pref.dlg.lbl.Longitude = Longitude:
 pref.dlg.lbl.effect1 = The effects will take place the next time you open a window.
 pref.dlg.lbl.Checkingupdates = Checking for updates\u2026
 pref.dlg.PrefChoiseSelector1 = Always ask

core/src/net/sf/openrocket/simulation/FlightDataType.java

@@ -79,10 +79,10 @@ public class FlightDataType implements Comparable<FlightDataType> {
 	public static final FlightDataType TYPE_ACCELERATION_XY = newType(trans.get("FlightDataType.TYPE_ACCELERATION_XY"), "Al", UnitGroup.UNITS_ACCELERATION,
 			FlightDataTypeGroup.POSITION_AND_MOTION, 5);
 	//// Latitude
-	public static final FlightDataType TYPE_LATITUDE = newType(trans.get("FlightDataType.TYPE_LATITUDE"), "\u03c6", UnitGroup.UNITS_ANGLE,
+	public static final FlightDataType TYPE_LATITUDE = newType(trans.get("FlightDataType.TYPE_LATITUDE"), "\u03c6", UnitGroup.UNITS_LATITUDE,
 			FlightDataTypeGroup.POSITION_AND_MOTION, 6);
 	//// Longitude
-	public static final FlightDataType TYPE_LONGITUDE = newType(trans.get("FlightDataType.TYPE_LONGITUDE"), "\u03bb", UnitGroup.UNITS_ANGLE,
+	public static final FlightDataType TYPE_LONGITUDE = newType(trans.get("FlightDataType.TYPE_LONGITUDE"), "\u03bb", UnitGroup.UNITS_LONGITUDE,
 			FlightDataTypeGroup.POSITION_AND_MOTION, 7);
 
 
@@ -212,7 +212,7 @@ public class FlightDataType implements Comparable<FlightDataType> {
 	//// Reference area
 	public static final FlightDataType TYPE_REFERENCE_AREA = newType(trans.get("FlightDataType.TYPE_REFERENCE_AREA"), "Ar", UnitGroup.UNITS_AREA,
 			FlightDataTypeGroup.REFERENCE_VALUES, 1);
-	
+
 	
 	//  Atmospheric conditions
 	//// Wind velocity
@@ -416,7 +416,7 @@ public class FlightDataType implements Comparable<FlightDataType> {
 		this.groupPriority = priority;
 		this.hashCode = this.name.toLowerCase(Locale.ENGLISH).hashCode();
 	}
-	
+
 	public String getName() {
 		return name;
 	}
@@ -436,7 +436,7 @@ public class FlightDataType implements Comparable<FlightDataType> {
 	public int getGroupPriority() {
 		return groupPriority;
 	}
-	
+
 	@Override
 	public String toString() {
 		return name; //+" ("+symbol+") "+units.getDefaultUnit().toString();

core/src/net/sf/openrocket/unit/Unit.java

@@ -69,7 +69,11 @@ public abstract class Unit {
 	public boolean hasSpace() {
 		return true;
 	}
-	
+
+	public double getMultiplier() {
+		return multiplier;
+	}
+
 	@Override
 	public String toString() {
 		return unit;

core/src/net/sf/openrocket/unit/UnitGroup.java

@@ -16,8 +16,11 @@ import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import net.sf.openrocket.l10n.Translator;
 import net.sf.openrocket.rocketcomponent.FlightConfiguration;
 import net.sf.openrocket.rocketcomponent.Rocket;
+import net.sf.openrocket.startup.Application;
+import net.sf.openrocket.util.Chars;
 import net.sf.openrocket.util.StringUtils;
 
 
@@ -29,15 +32,15 @@ import net.sf.openrocket.util.StringUtils;
  */
 
 public class UnitGroup {
-	
+
 	public static final UnitGroup UNITS_NONE;
-	
+
 	public static final UnitGroup UNITS_MOTOR_DIMENSIONS;
 	public static final UnitGroup UNITS_LENGTH;
 	public static final UnitGroup UNITS_ALL_LENGTHS;
 	public static final UnitGroup UNITS_DISTANCE;
 	public static final UnitGroup UNITS_SHAPE_PARAMETER;
-	
+
 	public static final UnitGroup UNITS_AREA;
 	public static final UnitGroup UNITS_STABILITY;
 	public static final UnitGroup UNITS_SECONDARY_STABILITY;
@@ -49,6 +52,8 @@ public class UnitGroup {
 	public static final UnitGroup UNITS_STABILITY_CALIBERS;
 	public static final UnitGroup UNITS_VELOCITY;
 	public static final UnitGroup UNITS_WINDSPEED;
+	public static final UnitGroup UNITS_LATITUDE;
+	public static final UnitGroup UNITS_LONGITUDE;
 	public static final UnitGroup UNITS_ACCELERATION;
 	public static final UnitGroup UNITS_MASS;
 	public static final UnitGroup UNITS_INERTIA;
@@ -58,13 +63,13 @@ public class UnitGroup {
 	public static final UnitGroup UNITS_DENSITY_LINE;
 	public static final UnitGroup UNITS_FORCE;
 	public static final UnitGroup UNITS_IMPULSE;
-	
+
 	/** Time in the order of less than a second (time step etc). */
 	public static final UnitGroup UNITS_TIME_STEP;
-	
+
 	/** Time in the order of seconds (motor delay etc). */
 	public static final UnitGroup UNITS_SHORT_TIME;
-	
+
 	/** Time in the order of the flight time of a rocket. */
 	public static final UnitGroup UNITS_FLIGHT_TIME;
 	public static final UnitGroup UNITS_ROLL;
@@ -72,10 +77,10 @@ public class UnitGroup {
 	public static final UnitGroup UNITS_PRESSURE;
 	public static final UnitGroup UNITS_RELATIVE;
 	public static final UnitGroup UNITS_ROUGHNESS;
-	
+
 	public static final UnitGroup UNITS_COEFFICIENT;
 	public static final UnitGroup UNITS_FREQUENCY;
-	
+
 	public static final UnitGroup UNITS_ENERGY;
 	public static final UnitGroup UNITS_POWER;
 	public static final UnitGroup UNITS_MOMENTUM;
@@ -83,12 +88,14 @@ public class UnitGroup {
 	public static final UnitGroup UNITS_CURRENT;
 
 	public static final UnitGroup UNITS_SCALING;
-	
+
-	
+
 	public static final Map<String, UnitGroup> UNITS; // keys such as "LENGTH", "VELOCITY"
 	public static final Map<String, UnitGroup> SIUNITS; // keys such a "m", "m/s"
-	
+
-	
+	private static final Translator trans = Application.getTranslator();
+
+
 	/*
 	 * Note:  Units may not use HTML tags.
 	 * 
@@ -98,32 +105,32 @@ public class UnitGroup {
 	static {
 		UNITS_NONE = new UnitGroup();
 		UNITS_NONE.addUnit(Unit.NOUNIT);
-		
+
 		UNITS_ENERGY = new UnitGroup();
 		UNITS_ENERGY.addUnit(new GeneralUnit(1, "J"));
 		UNITS_ENERGY.addUnit(new GeneralUnit(1e-7, "erg"));
 		UNITS_ENERGY.addUnit(new GeneralUnit(1.055, "BTU"));
 		UNITS_ENERGY.addUnit(new GeneralUnit(4.184, "cal"));
 		UNITS_ENERGY.addUnit(new GeneralUnit(1.3558179483314, "ft" + DOT + "lbf"));
-		
+
 		UNITS_POWER = new UnitGroup();
 		UNITS_POWER.addUnit(new GeneralUnit(1e-3, "mW"));
 		UNITS_POWER.addUnit(new GeneralUnit(1, "W"));
 		UNITS_POWER.addUnit(new GeneralUnit(1e3, "kW"));
 		UNITS_POWER.addUnit(new GeneralUnit(1e-7, "ergs"));
 		UNITS_POWER.addUnit(new GeneralUnit(745.699872, "hp"));
-		
+
 		UNITS_MOMENTUM = new UnitGroup();
 		UNITS_MOMENTUM.addUnit(new GeneralUnit(1, "kg" + DOT + "m/s"));
-		
+
 		UNITS_VOLTAGE = new UnitGroup();
 		UNITS_VOLTAGE.addUnit(new GeneralUnit(1e-3, "mV"));
 		UNITS_VOLTAGE.addUnit(new GeneralUnit(1, "V"));
-		
+
 		UNITS_CURRENT = new UnitGroup();
 		UNITS_CURRENT.addUnit(new GeneralUnit(1e-3, "mA"));
 		UNITS_CURRENT.addUnit(new GeneralUnit(1, "A"));
-		
+
 		UNITS_LENGTH = new UnitGroup();
 		UNITS_LENGTH.addUnit(new GeneralUnit(0.001, "mm"));
 		UNITS_LENGTH.addUnit(new GeneralUnit(0.01, "cm"));
@@ -131,13 +138,13 @@ public class UnitGroup {
 		UNITS_LENGTH.addUnit(new InchUnit(0.0254, "in", 1));
 		UNITS_LENGTH.addUnit(new FractionalUnit(0.0254, "in/64", "in", 64, 1d / 16d, 0.5d / 64d));
 		UNITS_LENGTH.addUnit(new GeneralUnit(0.3048, "ft"));
-		
+
 		UNITS_MOTOR_DIMENSIONS = new UnitGroup();
 		UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.001, "mm"));
 		UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.01, "cm"));
 		UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(1, "m"));
 		UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.0254, "in"));
-		
+
 		UNITS_DISTANCE = new UnitGroup();
 		UNITS_DISTANCE.addUnit(new GeneralUnit(1, "m"));
 		UNITS_DISTANCE.addUnit(new GeneralUnit(1000, "km"));
@@ -145,7 +152,7 @@ public class UnitGroup {
 		UNITS_DISTANCE.addUnit(new GeneralUnit(0.9144, "yd"));
 		UNITS_DISTANCE.addUnit(new GeneralUnit(1609.344, "mi"));
 		UNITS_DISTANCE.addUnit(new GeneralUnit(1852, "nmi"));
-		
+
 		UNITS_ALL_LENGTHS = new UnitGroup();
 		UNITS_ALL_LENGTHS.addUnit(new GeneralUnit(0.001, "mm"));
 		UNITS_ALL_LENGTHS.addUnit(new GeneralUnit(0.01, "cm"));
@@ -157,7 +164,7 @@ public class UnitGroup {
 		UNITS_ALL_LENGTHS.addUnit(new GeneralUnit(0.9144, "yd"));
 		UNITS_ALL_LENGTHS.addUnit(new GeneralUnit(1609.344, "mi"));
 		UNITS_ALL_LENGTHS.addUnit(new GeneralUnit(1852, "nmi"));
-		
+
 		UNITS_AREA = new UnitGroup();
 		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.001), "mm" + SQUARED));
 		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.01), "cm" + SQUARED));
@@ -167,7 +174,7 @@ public class UnitGroup {
 
 		UNITS_SHAPE_PARAMETER = new UnitGroup();
 		UNITS_SHAPE_PARAMETER.addUnit(new GeneralUnit(1, "" + ZWSP, 1, 10, 0.1));
-		
+
 		
 		UNITS_STABILITY = new UnitGroup();
 		UNITS_SECONDARY_STABILITY = new UnitGroup();
@@ -184,25 +191,33 @@ public class UnitGroup {
 		UNITS_VELOCITY.addUnit(new GeneralUnit(0.3048, "ft/s"));
 		UNITS_VELOCITY.addUnit(new GeneralUnit(0.44704, "mph"));
 		UNITS_VELOCITY.addUnit(new GeneralUnit(0.51444445, "kt"));
-		
+
 		UNITS_WINDSPEED = new UnitGroup();
 		UNITS_WINDSPEED.addUnit(new GeneralUnit(1, "m/s"));
 		UNITS_WINDSPEED.addUnit(new GeneralUnit(1 / 3.6, "km/h"));
 		UNITS_WINDSPEED.addUnit(new GeneralUnit(0.3048, "ft/s"));
 		UNITS_WINDSPEED.addUnit(new GeneralUnit(0.44704, "mph"));
 		UNITS_WINDSPEED.addUnit(new GeneralUnit(0.51444445, "kt"));
-		
+
+		UNITS_LATITUDE = new UnitGroup();
+		UNITS_LATITUDE.addUnit(new GeneralUnit(1, DEGREE + " " + trans.get("CompassRose.lbl.north")));
+		UNITS_LATITUDE.addUnit(new GeneralUnit(-1, DEGREE + " " + trans.get("CompassRose.lbl.south")));
+
+		UNITS_LONGITUDE = new UnitGroup();
+		UNITS_LONGITUDE.addUnit(new GeneralUnit(1, DEGREE + " " + trans.get("CompassRose.lbl.east")));
+		UNITS_LONGITUDE.addUnit(new GeneralUnit(-1, DEGREE + " " + trans.get("CompassRose.lbl.west")));
+
 		UNITS_ACCELERATION = new UnitGroup();
 		UNITS_ACCELERATION.addUnit(new GeneralUnit(1, "m/s" + SQUARED));
 		UNITS_ACCELERATION.addUnit(new GeneralUnit(0.3048, "ft/s" + SQUARED));
 		UNITS_ACCELERATION.addUnit(new GeneralUnit(9.80665, "G"));
-		
+
 		UNITS_MASS = new UnitGroup();
 		UNITS_MASS.addUnit(new GeneralUnit(0.001, "g"));
 		UNITS_MASS.addUnit(new GeneralUnit(1, "kg"));
 		UNITS_MASS.addUnit(new GeneralUnit(0.0283495231, "oz"));
 		UNITS_MASS.addUnit(new GeneralUnit(0.45359237, "lb"));
-		
+
 		UNITS_INERTIA = new UnitGroup();
 		UNITS_INERTIA.addUnit(new GeneralUnit(0.0001, "kg" + DOT + "cm" + SQUARED));
 		UNITS_INERTIA.addUnit(new GeneralUnit(1, "kg" + DOT + "m" + SQUARED));
@@ -210,12 +225,12 @@ public class UnitGroup {
 		UNITS_INERTIA.addUnit(new GeneralUnit(0.000292639653, "lb" + DOT + "in" + SQUARED));
 		UNITS_INERTIA.addUnit(new GeneralUnit(0.0421401101, "lb" + DOT + "ft" + SQUARED));
 		UNITS_INERTIA.addUnit(new GeneralUnit(1.35581795, "lbf" + DOT + "ft" + DOT + "s" + SQUARED));
-		
+
 		UNITS_ANGLE = new UnitGroup();
 		UNITS_ANGLE.addUnit(new DegreeUnit());
 		UNITS_ANGLE.addUnit(new FixedPrecisionUnit("rad", 0.01));
 		UNITS_ANGLE.addUnit(new GeneralUnit(1.0 / 3437.74677078, "arcmin"));
-		
+
 		UNITS_DENSITY_BULK = new UnitGroup();
 		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1000, "g/cm" + CUBED));
 		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1000999, "kg/cm" + CUBED));
@@ -223,7 +238,7 @@ public class UnitGroup {
 		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1, "kg/m" + CUBED));
 		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1729.99404, "oz/in" + CUBED));
 		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(16.0184634, "lb/ft" + CUBED));
-		
+
 		UNITS_DENSITY_SURFACE = new UnitGroup();
 		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(10, "g/cm" + SQUARED));
 		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.001, "g/m" + SQUARED));
@@ -233,7 +248,7 @@ public class UnitGroup {
 		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(43.9418487, "oz/in" + SQUARED));
 		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.305151727, "oz/ft" + SQUARED));
 		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(4.88242764, "lb/ft" + SQUARED));
-		
+
 		UNITS_DENSITY_LINE = new UnitGroup();
 		UNITS_DENSITY_LINE.addUnit(new GeneralUnit(0.1, "g/cm"));
 		UNITS_DENSITY_LINE.addUnit(new GeneralUnit(0.001, "g/m"));
@@ -241,38 +256,38 @@ public class UnitGroup {
 		UNITS_DENSITY_LINE.addUnit(new GeneralUnit(10, "kg/dm"));
 		UNITS_DENSITY_LINE.addUnit(new GeneralUnit(1, "kg/m"));
 		UNITS_DENSITY_LINE.addUnit(new GeneralUnit(0.0930102465, "oz/ft"));
-		
+
 		UNITS_FORCE = new UnitGroup();
 		UNITS_FORCE.addUnit(new GeneralUnit(1, "N"));
 		UNITS_FORCE.addUnit(new GeneralUnit(4.44822162, "lbf"));
 		UNITS_FORCE.addUnit(new GeneralUnit(9.80665, "kgf"));
-		
+
 		UNITS_IMPULSE = new UnitGroup();
 		UNITS_IMPULSE.addUnit(new GeneralUnit(1, "Ns"));
 		UNITS_IMPULSE.addUnit(new GeneralUnit(4.44822162, "lbf" + DOT + "s"));
-		
+
 		UNITS_TIME_STEP = new UnitGroup();
 		UNITS_TIME_STEP.addUnit(new FixedPrecisionUnit("ms", 1, 0.001));
 		UNITS_TIME_STEP.addUnit(new FixedPrecisionUnit("s", 0.01));
-		
+
 		UNITS_SHORT_TIME = new UnitGroup();
 		UNITS_SHORT_TIME.addUnit(new GeneralUnit(1, "s"));
-		
+
 		UNITS_FLIGHT_TIME = new UnitGroup();
 		UNITS_FLIGHT_TIME.addUnit(new GeneralUnit(1, "s"));
 		UNITS_FLIGHT_TIME.addUnit(new GeneralUnit(60, "min"));
-		
+
 		UNITS_ROLL = new UnitGroup();
 		UNITS_ROLL.addUnit(new GeneralUnit(1, "rad/s"));
 		UNITS_ROLL.addUnit(new GeneralUnit(Math.PI / 180, DEGREE + "/s"));
 		UNITS_ROLL.addUnit(new GeneralUnit(2 * Math.PI, "r/s"));
 		UNITS_ROLL.addUnit(new GeneralUnit(2 * Math.PI / 60, "rpm"));
-		
+
 		UNITS_TEMPERATURE = new UnitGroup();
 		UNITS_TEMPERATURE.addUnit(new FixedPrecisionUnit("K", 0.01));
 		UNITS_TEMPERATURE.addUnit(new TemperatureUnit(1, 273.15, 0.01, DEGREE + "C"));
 		UNITS_TEMPERATURE.addUnit(new TemperatureUnit(5.0 / 9.0, 459.67, 0.01, DEGREE + "F"));
-		
+
 		UNITS_PRESSURE = new UnitGroup();
 		UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("mbar", 0.01, 1.0e2));
 		UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("bar", 0.001, 1.0e5));
@@ -281,26 +296,26 @@ public class UnitGroup {
 		UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("inHg", 0.01, 3386.389));
 		UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("psi", 0.01, 6894.75729));
 		UNITS_PRESSURE.addUnit(new GeneralUnit(1, "Pa"));
-		
+
 		UNITS_RELATIVE = new UnitGroup();
 		UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + ZWSP, 0.01, 1.0));
 		UNITS_RELATIVE.addUnit(new GeneralUnit(0.01, "%"));
 		UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + PERMILLE, 1, 0.001));
-		
+
-		
+
 		UNITS_ROUGHNESS = new UnitGroup();
 		UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.000001, MICRO + "m"));
 		UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.0000254, "mil"));
 		UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.0254, "in"));
 		UNITS_ROUGHNESS.addUnit(new GeneralUnit(1, "m"));
-		
+
-		
+
 		UNITS_COEFFICIENT = new UnitGroup();
 		UNITS_COEFFICIENT.addUnit(new FixedPrecisionUnit("" + ZWSP, 0.001)); // zero-width space
 
 		UNITS_SCALING = new UnitGroup();
 		UNITS_SCALING.addUnit(new FixedPrecisionUnit("" + ZWSP, 0.1)); // zero-width space
-		
+
 		
 		// This is not used by OpenRocket, and not extensively tested:
 		UNITS_FREQUENCY = new UnitGroup();
@@ -309,7 +324,7 @@ public class UnitGroup {
 		UNITS_FREQUENCY.addUnit(new FrequencyUnit(1000, "kHz"));
 
 		resetDefaultUnits();
-		
+
 		HashMap<String, UnitGroup> map = new HashMap<String, UnitGroup>();
 		map.put("NONE", UNITS_NONE);
 		map.put("LENGTH", UNITS_LENGTH);
@@ -346,9 +361,11 @@ public class UnitGroup {
 		map.put("MOMENTUM", UNITS_MOMENTUM);
 		map.put("FREQUENCY", UNITS_FREQUENCY);
 		map.put("WINDSPEED", UNITS_WINDSPEED);
-		
+		map.put("LATITUDE", UNITS_LATITUDE);
+		map.put("LONGITUDE", UNITS_LONGITUDE);
+
 		UNITS = Collections.unmodifiableMap(map);
-		
+
 		HashMap<String, UnitGroup> simap = new HashMap<String, UnitGroup>();
 		simap.put("m", UNITS_ALL_LENGTHS);
 		simap.put("m^2", UNITS_AREA);
@@ -368,10 +385,10 @@ public class UnitGroup {
 		simap.put("kg m/s", UNITS_MOMENTUM);
 		simap.put("Hz", UNITS_FREQUENCY);
 		simap.put("K", UNITS_TEMPERATURE);
-		
+
 		SIUNITS = Collections.unmodifiableMap(simap);
 	}
-	
+
 	public static void setDefaultMetricUnits() {
 		UNITS_LENGTH.setDefaultUnit("cm");
 		UNITS_MOTOR_DIMENSIONS.setDefaultUnit("mm");
@@ -394,11 +411,13 @@ public class UnitGroup {
 		UNITS_ROLL.setDefaultUnit("r/s");
 		UNITS_TEMPERATURE.setDefaultUnit(DEGREE + "C");
 		UNITS_WINDSPEED.setDefaultUnit("m/s");
+		UNITS_LATITUDE.setDefaultUnit(DEGREE + " " + trans.get("CompassRose.lbl.north"));
+		UNITS_LONGITUDE.setDefaultUnit(DEGREE + " " + trans.get("CompassRose.lbl.east"));
 		UNITS_PRESSURE.setDefaultUnit("mbar");
 		UNITS_RELATIVE.setDefaultUnit("%");
 		UNITS_ROUGHNESS.setDefaultUnit(MICRO + "m");
 	}
-	
+
 	public static void setDefaultImperialUnits() {
 		UNITS_LENGTH.setDefaultUnit("in");
 		UNITS_MOTOR_DIMENSIONS.setDefaultUnit("in");
@@ -421,6 +440,8 @@ public class UnitGroup {
 		UNITS_ROLL.setDefaultUnit("r/s");
 		UNITS_TEMPERATURE.setDefaultUnit(DEGREE + "F");
 		UNITS_WINDSPEED.setDefaultUnit("mph");
+		UNITS_LATITUDE.setDefaultUnit(DEGREE + " " + trans.get("CompassRose.lbl.north"));
+		UNITS_LONGITUDE.setDefaultUnit(DEGREE + " " + trans.get("CompassRose.lbl.east"));
 		UNITS_PRESSURE.setDefaultUnit("mbar");
 		UNITS_RELATIVE.setDefaultUnit("%");
 		UNITS_ROUGHNESS.setDefaultUnit("mil");
@@ -443,6 +464,8 @@ public class UnitGroup {
 		UNITS_STABILITY_CALIBERS.setDefaultUnit(0);
 		UNITS_VELOCITY.setDefaultUnit(0);
 		UNITS_WINDSPEED.setDefaultUnit(0);
+		UNITS_LATITUDE.setDefaultUnit(0);
+		UNITS_LONGITUDE.setDefaultUnit(0);
 		UNITS_ACCELERATION.setDefaultUnit(0);
 		UNITS_MASS.setDefaultUnit(0);
 		UNITS_INERTIA.setDefaultUnit(1);
@@ -473,13 +496,13 @@ public class UnitGroup {
 		stabilityUnit.addUnit(new CaliberUnit((Rocket) null));
 		stabilityUnit.addUnit(new PercentageOfLengthUnit((Rocket) null));
 	}
-	
+
 	
 	/**
 	 * Return a UnitGroup for stability units based on the rocket.
-	 * 
+	 *
-	 * @param rocket	the rocket from which to calculate the caliber
+	 * @param rocket    the rocket from which to calculate the caliber
-	 * @return			the unit group
+	 * @return the unit group
 	 */
 	public static StabilityUnitGroup stabilityUnits(Rocket rocket) {
 		return new StabilityUnitGroup(UnitGroup.UNITS_STABILITY, rocket);
@@ -494,13 +517,13 @@ public class UnitGroup {
 	public static StabilityUnitGroup secondaryStabilityUnits(Rocket rocket) {
 		return new StabilityUnitGroup(UnitGroup.UNITS_SECONDARY_STABILITY, rocket);
 	}
-	
+
-	
+
 	/**
 	 * Return a UnitGroup for stability units based on the rocket configuration.
-	 * 
+	 *
-	 * @param config	the rocket configuration from which to calculate the caliber
+	 * @param config    the rocket configuration from which to calculate the caliber
-	 * @return			the unit group
+	 * @return the unit group
 	 */
 	public static StabilityUnitGroup stabilityUnits(FlightConfiguration config) {
 		return new StabilityUnitGroup(UnitGroup.UNITS_STABILITY, config);
@@ -515,13 +538,13 @@ public class UnitGroup {
 	public static StabilityUnitGroup secondaryStabilityUnits(FlightConfiguration config) {
 		return new StabilityUnitGroup(UnitGroup.UNITS_SECONDARY_STABILITY, config);
 	}
-	
+
-	
+
 	/**
 	 * Return a UnitGroup for stability units based on a constant caliber.
-	 * 
+	 *
-	 * @param reference	the constant reference length
+	 * @param reference    the constant reference length
-	 * @return			the unit group
+	 * @return the unit group
 	 */
 	public static UnitGroup stabilityUnits(double reference) {
 		return new StabilityUnitGroup(UnitGroup.UNITS_STABILITY, reference);
@@ -536,33 +559,33 @@ public class UnitGroup {
 	public static UnitGroup secondaryStabilityUnits(double reference) {
 		return new StabilityUnitGroup(UnitGroup.UNITS_SECONDARY_STABILITY, reference);
 	}
-	
+
-	
+
 	//////////////////////////////////////////////////////
-	
+
-	
+
 	protected ArrayList<Unit> units = new ArrayList<Unit>();
 	protected int defaultUnit = 0;
-	
+
 	public int getUnitCount() {
 		return units.size();
 	}
-	
+
 	public Unit getDefaultUnit() {
 		return units.get(defaultUnit);
 	}
-	
+
 	public int getDefaultUnitIndex() {
 		return defaultUnit;
 	}
-	
+
 	public void setDefaultUnit(int n) {
 		if (n < 0 || n >= units.size()) {
 			throw new IllegalArgumentException("index out of range: " + n);
 		}
 		defaultUnit = n;
 	}
-	
+
 	public Unit getSIUnit() {
 		for (Unit u : units) {
 			if (u.multiplier == 1) {
@@ -571,14 +594,14 @@ public class UnitGroup {
 		}
 		return UNITS_NONE.getDefaultUnit();
 	}
-	
+
 	/**
 	 * Find a unit by approximate unit name.  Only letters and (ordinary) numbers are
 	 * considered in the matching.  This method is mainly means for testing, allowing
 	 * a simple means to obtain a particular unit.
-	 * 
+	 *
-	 * @param str	the unit name.
+	 * @param str    the unit name.
-	 * @return		the corresponding unit, or <code>null</code> if not found.
+	 * @return the corresponding unit, or <code>null</code> if not found.
 	 */
 	public Unit findApproximate(String str) {
 		str = str.replaceAll("\\W", "").trim();
@@ -589,13 +612,13 @@ public class UnitGroup {
 		}
 		return null;
 	}
-	
+
 	/**
 	 * Set the default unit based on the unit name.  Throws an exception if a
 	 * unit with the provided name is not available.
-	 * 
+	 *
-	 * @param   name	the unit name.
+	 * @param   name    the unit name.
-	 * @throws  IllegalArgumentException	if the corresponding unit is not found in the group.
+	 * @throws  IllegalArgumentException    if the corresponding unit is not found in the group.
 	 */
 	public void setDefaultUnit(String name) throws IllegalArgumentException {
 		for (int i = 0; i < units.size(); i++) {
@@ -606,7 +629,7 @@ public class UnitGroup {
 		}
 		throw new IllegalArgumentException("name=" + name);
 	}
-	
+
 	public Unit getUnit(String name) throws IllegalArgumentException {
 		for (int i = 0; i < units.size(); i++) {
 			if (units.get(i).getUnit().equals(name)) {
@@ -615,31 +638,31 @@ public class UnitGroup {
 		}
 		throw new IllegalArgumentException("name=" + name);
 	}
-	
+
 	public Unit getUnit(int n) {
 		return units.get(n);
 	}
-	
+
 	public int getUnitIndex(Unit u) {
 		return units.indexOf(u);
 	}
-	
+
 	public void addUnit(Unit u) {
 		units.add(u);
 	}
-	
+
 	public boolean contains(Unit u) {
 		return units.contains(u);
 	}
-	
+
 	public Unit[] getUnits() {
 		return units.toArray(new Unit[0]);
 	}
-	
+
 	/**
 	 * Return the value in SI units from the default unit of this group.
 	 * It is the same as calling <code>getDefaultUnit().fromUnit(value)</code>
-	 * 
+	 *
 	 * @param value the default unit value to convert
 	 * @return the value in SI units.
 	 * @see Unit#fromUnit(double)
@@ -647,51 +670,48 @@ public class UnitGroup {
 	public double fromUnit(double value) {
 		return this.getDefaultUnit().fromUnit(value);
 	}
-	
+
 	/**
 	 * Return the value formatted by the default unit of this group.
 	 * It is the same as calling <code>getDefaultUnit().toString(value)</code>.
-	 * 
+	 *
-	 * @param value		the SI value to format.
+	 * @param value        the SI value to format.
-	 * @return			the formatted string.
+	 * @return the formatted string.
-	 * @see 			Unit#toString(double)
+	 * @see             Unit#toString(double)
 	 */
 	public String toString(double value) {
 		return this.getDefaultUnit().toString(value);
 	}
-	
+
-	
+
 	/**
 	 * Return the value formatted by the default unit of this group including the unit.
 	 * It is the same as calling <code>getDefaultUnit().toStringUnit(value)</code>.
-	 * 
+	 *
-	 * @param value		the SI value to format.
+	 * @param value        the SI value to format.
-	 * @return			the formatted string.
+	 * @return the formatted string.
-	 * @see 			Unit#toStringUnit(double)
+	 * @see             Unit#toStringUnit(double)
 	 */
 	public String toStringUnit(double value) {
 		return this.getDefaultUnit().toStringUnit(value);
 	}
-	
+
-	
+
-	
-	
-	
 	/**
 	 * Creates a new Value object with the specified value and the default unit of this group.
-	 * 
+	 *
-	 * @param value	the value to set.
+	 * @param value    the value to set.
-	 * @return		a new Value object.
+	 * @return a new Value object.
 	 */
 	public Value toValue(double value) {
 		return this.getDefaultUnit().toValue(value);
 	}
-	
+
 	@Override
 	public String toString() {
 		return this.getClass().getSimpleName() + ":" + this.getSIUnit().toString();
 	}
-	
+
 	@Override
 	public boolean equals(Object o) {
 		UnitGroup u = (UnitGroup) o;
@@ -699,43 +719,43 @@ public class UnitGroup {
 		if (size != u.units.size()) {
 			return false;
 		}
-		
+
 		for (int i = 0; i < size; i++) {
 			if (!units.get(i).equals(u.units.get(i))) {
 				return false;
 			}
 		}
-		
+
 		return true;
-		
+
 	}
-	
+
-	
+
 	private static final Pattern STRING_PATTERN = Pattern.compile("^\\s*([0-9.,-]+)(.*?)$");
-	
+
 	/**
 	 * Converts a string into an SI value.  If the string has one of the units in this
 	 * group appended to it, that unit will be used in conversion.  Otherwise the default
 	 * unit will be used.  If an unknown unit is specified or the value does not parse
-	 * with <code>Double.parseDouble</code> then a <code>NumberFormatException</code> 
+	 * with <code>Double.parseDouble</code> then a <code>NumberFormatException</code>
 	 * is thrown.
 	 * <p>
 	 * This method is applicable only for simple units without e.g. powers.
-	 * 
+	 *
 	 * @param str   the string to parse.
-	 * @return		the SI value.
+	 * @return the SI value.
 	 * @throws NumberFormatException   if the string cannot be parsed.
 	 */
 	public double fromString(String str) {
 		Matcher matcher = STRING_PATTERN.matcher(str);
-		
+
 		if (!matcher.matches()) {
 			throw new NumberFormatException("string did not match required pattern");
 		}
 
 		double value = StringUtils.convertToDouble(matcher.group(1));
 		String unit = matcher.group(2).trim();
-		
+
 		if (unit.equals("")) {
 			value = this.getDefaultUnit().fromUnit(value);
 		} else {
@@ -751,14 +771,14 @@ public class UnitGroup {
 				throw new NumberFormatException("unknown unit " + unit);
 			}
 		}
-		
+
 		return value;
 	}
-	
+
-	
+
 	///////////////////////////
-	
+
-	
+
 	@Override
 	public int hashCode() {
 		int code = 0;
@@ -767,7 +787,7 @@ public class UnitGroup {
 		}
 		return code;
 	}
-	
+
 	/**
 	 * A private class that switches the CaliberUnit to a rocket-specific CaliberUnit.
 	 * All other methods are passed through to UNITS_STABILITY.
@@ -775,11 +795,11 @@ public class UnitGroup {
 	public static class StabilityUnitGroup extends UnitGroup {
 		private final PercentageOfLengthUnit percentageOfLengthUnit;
 		private final UnitGroup stabilityUnit;
-		
+
 		public StabilityUnitGroup(UnitGroup stabilityUnit, double ref) {
 			this(stabilityUnit, new CaliberUnit(ref), new PercentageOfLengthUnit(ref));
 		}
-		
+
 		public StabilityUnitGroup(UnitGroup stabilityUnit, Rocket rocket) {
 			this(stabilityUnit, new CaliberUnit(rocket), new PercentageOfLengthUnit(rocket));
 		}
@@ -787,7 +807,7 @@ public class UnitGroup {
 		public StabilityUnitGroup(UnitGroup stabilityUnit, FlightConfiguration config) {
 			this(stabilityUnit, new CaliberUnit(config), new PercentageOfLengthUnit(config));
 		}
-		
+
 		private StabilityUnitGroup(UnitGroup stabilityUnit, CaliberUnit caliberUnit, PercentageOfLengthUnit percentageOfLengthUnit) {
 			this.percentageOfLengthUnit = percentageOfLengthUnit;
 			this.stabilityUnit = stabilityUnit;

swing/src/net/sf/openrocket/gui/adaptors/DoubleModel.java

@@ -123,7 +123,8 @@ public class DoubleModel implements StateChangeListener, ChangeSource, Invalidat
 		@Override
 		public Object getNextValue() {
 			double d = currentUnit.toUnit(DoubleModel.this.getValue());
-			double max = currentUnit.toUnit(maxValue);
+			boolean inverted = DoubleModel.this.currentUnit.getMultiplier() < 0;
+			double max = inverted ? currentUnit.toUnit(minValue) : currentUnit.toUnit(maxValue);
 			if (MathUtil.equals(d, max))
 				return null;
 			d = currentUnit.getNextValue(d);
@@ -135,7 +136,8 @@ public class DoubleModel implements StateChangeListener, ChangeSource, Invalidat
 		@Override
 		public Object getPreviousValue() {
 			double d = currentUnit.toUnit(DoubleModel.this.getValue());
-			double min = currentUnit.toUnit(minValue);
+			boolean inverted = DoubleModel.this.currentUnit.getMultiplier() < 0;
+			double min = inverted ? currentUnit.toUnit(maxValue) : currentUnit.toUnit(minValue);
 			if (MathUtil.equals(d, min))
 				return null;
 			d = currentUnit.getPreviousValue(d);
@@ -315,11 +317,12 @@ public class DoubleModel implements StateChangeListener, ChangeSource, Invalidat
 		@Override
 		public int getValue() {
 			double value = DoubleModel.this.getValue();
+			boolean inverted = DoubleModel.this.getCurrentUnit().getMultiplier() < 0;
 			if (value <= min.getValue())
-				return 0;
+				return inverted ? MAX : 0;
 			if (value >= max.getValue())
-				return MAX;
+				return inverted ? 0 : MAX;
-			
+
 			double x;
 			if ((value <= mid.getValue()) || (quad2 == 0)) {		// If quad 2 is 0, the midpoint is perfectly in center
 				// Use linear scale
@@ -333,6 +336,9 @@ public class DoubleModel implements StateChangeListener, ChangeSource, Invalidat
 				//   a*x^2 + b*x + c-value == 0
 				x = (MathUtil.safeSqrt(quad1 * quad1 - 4 * quad2 * (quad0 - value)) - quad1) / (2 * quad2);
 			}
+			if (inverted) {
+				x = 1 - x;
+			}
 			return (int) (x * MAX);
 		}
 		
@@ -345,8 +351,12 @@ public class DoubleModel implements StateChangeListener, ChangeSource, Invalidat
 						" value=" + newValue + ", currently firing events");
 				return;
 			}
-			
+
+			boolean inverted = DoubleModel.this.getCurrentUnit().getMultiplier() < 0;
 			double x = (double) newValue / MAX;
+			if (inverted) {
+				x = 1 - x;
+			}
 			double scaledValue;
 			
 			if (x <= linearPosition) {

swing/src/net/sf/openrocket/gui/dialogs/preferences/UnitsPreferencesPanel.java

@@ -26,18 +26,18 @@ public class UnitsPreferencesPanel extends PreferencesPanel {
 		JComboBox<?> combo;
 		JPanel leftPanel = new JPanel(new MigLayout("ins 0"));
 		JPanel rightPanel = new JPanel(new MigLayout("ins 0"));
-		
+
 		//// Select your preferred units:
 		this.add(new JLabel(trans.get("pref.dlg.lbl.Selectprefunits")), "span, wrap paragraph");
 
 
 		// -------------- LEFT PANEL
-		
+
 		//// Rocket dimensions:
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Rocketdimensions")));
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_LENGTH));
 		leftPanel.add(combo, "sizegroup boxes, wrap");
-		
+
 		//// Motor dimensions:
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Motordimensions")));
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_MOTOR_DIMENSIONS));
@@ -47,37 +47,37 @@ public class UnitsPreferencesPanel extends PreferencesPanel {
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Distance")));
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_DISTANCE));
 		leftPanel.add(combo, "sizegroup boxes, wrap");
-		
+
 		//// Velocity:
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Velocity")));
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_VELOCITY));
 		leftPanel.add(combo, "sizegroup boxes, wrap");
-		
+
 		//// Acceleration:
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Acceleration")));
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_ACCELERATION));
 		leftPanel.add(combo, "sizegroup boxes, wrap");
-		
+
 		//// Mass:
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Mass")));
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_MASS));
 		leftPanel.add(combo, "sizegroup boxes, wrap");
-		
+
 		//// Force:
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Force")));
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_FORCE));
 		leftPanel.add(combo, "sizegroup boxes, wrap");
-		
+
 		//// Total impulse:
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Totalimpulse")));
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_IMPULSE));
 		leftPanel.add(combo, "sizegroup boxes, wrap");
-		
+
 		//// Moment of inertia:
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Momentofinertia")));
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_INERTIA));
 		leftPanel.add(combo, "sizegroup boxes, wrap");
-		
+
 		//// Stability:
 		leftPanel.add(new JLabel(trans.get("pref.dlg.lbl.Stability")));
 		combo = new JComboBox<>(new DefaultUnitSelector(UnitGroup.UNITS_STABILITY));
@@ -160,6 +160,17 @@ public class UnitsPreferencesPanel extends PreferencesPanel {
 		combo = new JComboBox<Object>(new DefaultUnitSelector(UnitGroup.UNITS_WINDSPEED));
 		rightPanel.add(combo, "sizegroup boxes, wrap");
 
+		//// Latitude
+		rightPanel.add(new JLabel(trans.get("pref.dlg.lbl.Latitude")));
+		combo = new JComboBox<>(new DefaultUnitSelector(UnitGroup.UNITS_LATITUDE));
+		rightPanel.add(combo, "sizegroup boxes, wrap");
+
+		//// Longitude
+		rightPanel.add(new JLabel(trans.get("pref.dlg.lbl.Longitude")));
+		combo = new JComboBox<>(new DefaultUnitSelector(UnitGroup.UNITS_LONGITUDE));
+		rightPanel.add(combo, "sizegroup boxes, wrap");
+
+
 		this.add(leftPanel, "top");
 		this.add(rightPanel, "top, wrap para");
 		

swing/src/net/sf/openrocket/gui/simulation/SimulationConditionsPanel.java

@@ -51,34 +51,34 @@ public class SimulationConditionsPanel extends JPanel {
 
 		JButton restoreDefaults = new SelectColorButton(trans.get("simedtdlg.but.resettodefault"));
 		restoreDefaults.addActionListener(new ActionListener() {
-			
+
 			@Override
 			public void actionPerformed(ActionEvent e) {
-				
+
 				DefaultSimulationOptionFactory f = Application.getInjector().getInstance(DefaultSimulationOptionFactory.class);
 				SimulationOptions defaults = f.getDefault();
 				conditions.copyConditionsFrom(defaults);
-				
+
 			}
-			
+
 		});
 		this.add(restoreDefaults, "span, split 3, skip, gapbottom para, gapright para, right");
-		
+
 		JButton saveDefaults = new SelectColorButton(trans.get("simedtdlg.but.savedefault"));
 		saveDefaults.addActionListener(new ActionListener() {
-			
+
 			@Override
 			public void actionPerformed(ActionEvent e) {
-				
+
 				DefaultSimulationOptionFactory f = Application.getInjector().getInstance(DefaultSimulationOptionFactory.class);
 				f.saveDefault(conditions);
-				
+
 			}
-			
+
 		});
-		
+
 		this.add(saveDefaults, "gapbottom para, gapright para, right");
-		
+
 	}
 
 	/**
@@ -327,17 +327,17 @@ public class SimulationConditionsPanel extends JPanel {
 		label.setToolTipText(tip);
 		sub.add(label);
 
-		m = new DoubleModel(target, "LaunchLatitude", UnitGroup.UNITS_NONE, -90, 90);
+		m = new DoubleModel(target, "LaunchLatitude", UnitGroup.UNITS_LATITUDE, -90, 90);
 
 		spin = new JSpinner(m.getSpinnerModel());
 		spin.setEditor(new SpinnerEditor(spin));
 		spin.setToolTipText(tip);
 		sub.add(spin, "w 65lp!");
 
-		label = new JLabel(Chars.DEGREE + " N");
+		unit = new UnitSelector(m);
-		label.setToolTipText(tip);
+		unit.setToolTipText(tip);
-		sub.add(label, "growx");
+		sub.add(unit, "growx");
-		slider = new BasicSlider(m.getSliderModel(-90, 90));
+		slider = new BasicSlider(m.getSliderModel());
 		slider.setToolTipText(tip);
 		sub.add(slider, "w 75lp, wrap");
 
@@ -348,17 +348,17 @@ public class SimulationConditionsPanel extends JPanel {
 		label.setToolTipText(tip);
 		sub.add(label);
 
-		m = new DoubleModel(target, "LaunchLongitude", UnitGroup.UNITS_NONE, -180, 180);
+		m = new DoubleModel(target, "LaunchLongitude", UnitGroup.UNITS_LONGITUDE, -180, 180);
 
 		spin = new JSpinner(m.getSpinnerModel());
 		spin.setEditor(new SpinnerEditor(spin));
 		spin.setToolTipText(tip);
 		sub.add(spin, "w 65lp!");
 
-		label = new JLabel(Chars.DEGREE + " E");
+		unit = new UnitSelector(m);
-		label.setToolTipText(tip);
+		unit.setToolTipText(tip);
-		sub.add(label, "growx");
+		sub.add(unit, "growx");
-		slider = new BasicSlider(m.getSliderModel(-180, 180));
+		slider = new BasicSlider(m.getSliderModel());
 		slider.setToolTipText(tip);
 		sub.add(slider, "w 75lp, wrap");