1 package net.sf.openrocket.unit;
3 import static net.sf.openrocket.util.Chars.*;
4 import static net.sf.openrocket.util.MathUtil.pow2;
6 import java.util.ArrayList;
7 import java.util.Collections;
8 import java.util.HashMap;
10 import java.util.regex.Matcher;
11 import java.util.regex.Pattern;
13 import net.sf.openrocket.rocketcomponent.Configuration;
14 import net.sf.openrocket.rocketcomponent.Rocket;
18 * A group of units (eg. length, mass etc.). Contains a list of different units of a same
21 * @author Sampo Niskanen <sampo.niskanen@iki.fi>
24 public class UnitGroup {
26 public static final UnitGroup UNITS_NONE;
28 public static final UnitGroup UNITS_MOTOR_DIMENSIONS;
29 public static final UnitGroup UNITS_LENGTH;
30 public static final UnitGroup UNITS_DISTANCE;
32 public static final UnitGroup UNITS_AREA;
33 public static final UnitGroup UNITS_STABILITY;
35 * This unit group contains only the caliber unit that never scales the originating "SI" value.
36 * It can be used in cases where the originating value is already in calibers to obtains the correct unit.
38 public static final UnitGroup UNITS_STABILITY_CALIBERS;
39 public static final UnitGroup UNITS_VELOCITY;
40 public static final UnitGroup UNITS_ACCELERATION;
41 public static final UnitGroup UNITS_MASS;
42 public static final UnitGroup UNITS_INERTIA;
43 public static final UnitGroup UNITS_ANGLE;
44 public static final UnitGroup UNITS_DENSITY_BULK;
45 public static final UnitGroup UNITS_DENSITY_SURFACE;
46 public static final UnitGroup UNITS_DENSITY_LINE;
47 public static final UnitGroup UNITS_FORCE;
48 public static final UnitGroup UNITS_IMPULSE;
50 /** Time in the order of less than a second (time step etc). */
51 public static final UnitGroup UNITS_TIME_STEP;
53 /** Time in the order of seconds (motor delay etc). */
54 public static final UnitGroup UNITS_SHORT_TIME;
56 /** Time in the order of the flight time of a rocket. */
57 public static final UnitGroup UNITS_FLIGHT_TIME;
58 public static final UnitGroup UNITS_ROLL;
59 public static final UnitGroup UNITS_TEMPERATURE;
60 public static final UnitGroup UNITS_PRESSURE;
61 public static final UnitGroup UNITS_RELATIVE;
62 public static final UnitGroup UNITS_ROUGHNESS;
64 public static final UnitGroup UNITS_COEFFICIENT;
66 // public static final UnitGroup UNITS_FREQUENCY;
69 public static final Map<String, UnitGroup> UNITS;
73 * Note: Units may not use HTML tags.
75 * The scaling value "X" is obtained by "one of this unit is X of SI units"
76 * Type into Google for example: "1 in^2 in m^2"
79 UNITS_NONE = new UnitGroup();
80 UNITS_NONE.addUnit(Unit.NOUNIT2);
82 UNITS_LENGTH = new UnitGroup();
83 UNITS_LENGTH.addUnit(new GeneralUnit(0.001, "mm"));
84 UNITS_LENGTH.addUnit(new GeneralUnit(0.01, "cm"));
85 UNITS_LENGTH.addUnit(new GeneralUnit(1, "m"));
86 UNITS_LENGTH.addUnit(new GeneralUnit(0.0254, "in"));
87 UNITS_LENGTH.addUnit(new GeneralUnit(0.3048, "ft"));
88 UNITS_LENGTH.setDefaultUnit(1);
90 UNITS_MOTOR_DIMENSIONS = new UnitGroup();
91 UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.001, "mm"));
92 UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.01, "cm"));
93 UNITS_MOTOR_DIMENSIONS.addUnit(new GeneralUnit(0.0254, "in"));
94 UNITS_MOTOR_DIMENSIONS.setDefaultUnit(0);
96 UNITS_DISTANCE = new UnitGroup();
97 UNITS_DISTANCE.addUnit(new GeneralUnit(1, "m"));
98 UNITS_DISTANCE.addUnit(new GeneralUnit(1000, "km"));
99 UNITS_DISTANCE.addUnit(new GeneralUnit(0.3048, "ft"));
100 UNITS_DISTANCE.addUnit(new GeneralUnit(0.9144, "yd"));
101 UNITS_DISTANCE.addUnit(new GeneralUnit(1609.344, "mi"));
103 UNITS_AREA = new UnitGroup();
104 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.001), "mm" + SQUARED));
105 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.01), "cm" + SQUARED));
106 UNITS_AREA.addUnit(new GeneralUnit(1, "m" + SQUARED));
107 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.0254), "in" + SQUARED));
108 UNITS_AREA.addUnit(new GeneralUnit(pow2(0.3048), "ft" + SQUARED));
109 UNITS_AREA.setDefaultUnit(1);
112 UNITS_STABILITY = new UnitGroup();
113 UNITS_STABILITY.addUnit(new GeneralUnit(0.001, "mm"));
114 UNITS_STABILITY.addUnit(new GeneralUnit(0.01, "cm"));
115 UNITS_STABILITY.addUnit(new GeneralUnit(0.0254, "in"));
116 UNITS_STABILITY.addUnit(new CaliberUnit((Rocket) null));
117 UNITS_STABILITY.setDefaultUnit(3);
119 UNITS_STABILITY_CALIBERS = new UnitGroup();
120 UNITS_STABILITY_CALIBERS.addUnit(new GeneralUnit(1, "cal"));
123 UNITS_VELOCITY = new UnitGroup();
124 UNITS_VELOCITY.addUnit(new GeneralUnit(1, "m/s"));
125 UNITS_VELOCITY.addUnit(new GeneralUnit(1 / 3.6, "km/h"));
126 UNITS_VELOCITY.addUnit(new GeneralUnit(0.3048, "ft/s"));
127 UNITS_VELOCITY.addUnit(new GeneralUnit(0.44704, "mph"));
129 UNITS_ACCELERATION = new UnitGroup();
130 UNITS_ACCELERATION.addUnit(new GeneralUnit(1, "m/s" + SQUARED));
131 UNITS_ACCELERATION.addUnit(new GeneralUnit(0.3048, "ft/s" + SQUARED));
133 UNITS_MASS = new UnitGroup();
134 UNITS_MASS.addUnit(new GeneralUnit(0.001, "g"));
135 UNITS_MASS.addUnit(new GeneralUnit(1, "kg"));
136 UNITS_MASS.addUnit(new GeneralUnit(0.0283495231, "oz"));
137 UNITS_MASS.addUnit(new GeneralUnit(0.45359237, "lb"));
139 UNITS_INERTIA = new UnitGroup();
140 UNITS_INERTIA.addUnit(new GeneralUnit(0.0001, "kg" + DOT + "cm" + SQUARED));
141 UNITS_INERTIA.addUnit(new GeneralUnit(1, "kg" + DOT + "m" + SQUARED));
142 UNITS_INERTIA.addUnit(new GeneralUnit(1.82899783e-5, "oz" + DOT + "in" + SQUARED));
143 UNITS_INERTIA.addUnit(new GeneralUnit(0.000292639653, "lb" + DOT + "in" + SQUARED));
144 UNITS_INERTIA.addUnit(new GeneralUnit(0.0421401101, "lb" + DOT + "ft" + SQUARED));
145 UNITS_INERTIA.addUnit(new GeneralUnit(1.35581795, "lbf" + DOT + "ft" + DOT + "s" + SQUARED));
146 UNITS_INERTIA.setDefaultUnit(1);
148 UNITS_ANGLE = new UnitGroup();
149 UNITS_ANGLE.addUnit(new DegreeUnit());
150 UNITS_ANGLE.addUnit(new FixedPrecisionUnit("rad", 0.01));
152 UNITS_DENSITY_BULK = new UnitGroup();
153 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1000, "g/cm" + CUBED));
154 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1, "kg/m" + CUBED));
155 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1729.99404, "oz/in" + CUBED));
156 UNITS_DENSITY_BULK.addUnit(new GeneralUnit(16.0184634, "lb/ft" + CUBED));
158 UNITS_DENSITY_SURFACE = new UnitGroup();
159 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(10, "g/cm" + SQUARED));
160 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.001, "g/m" + SQUARED));
161 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(1, "kg/m" + SQUARED));
162 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(43.9418487, "oz/in" + SQUARED));
163 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.305151727, "oz/ft" + SQUARED));
164 UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(4.88242764, "lb/ft" + SQUARED));
165 UNITS_DENSITY_SURFACE.setDefaultUnit(1);
167 UNITS_DENSITY_LINE = new UnitGroup();
168 UNITS_DENSITY_LINE.addUnit(new GeneralUnit(0.001, "g/m"));
169 UNITS_DENSITY_LINE.addUnit(new GeneralUnit(1, "kg/m"));
170 UNITS_DENSITY_LINE.addUnit(new GeneralUnit(0.0930102465, "oz/ft"));
172 UNITS_FORCE = new UnitGroup();
173 UNITS_FORCE.addUnit(new GeneralUnit(1, "N"));
174 UNITS_FORCE.addUnit(new GeneralUnit(4.44822162, "lbf"));
175 UNITS_FORCE.addUnit(new GeneralUnit(9.80665, "kgf"));
177 UNITS_IMPULSE = new UnitGroup();
178 UNITS_IMPULSE.addUnit(new GeneralUnit(1, "Ns"));
179 UNITS_IMPULSE.addUnit(new GeneralUnit(4.44822162, "lbf" + DOT + "s"));
181 UNITS_TIME_STEP = new UnitGroup();
182 UNITS_TIME_STEP.addUnit(new FixedPrecisionUnit("ms", 1, 0.001));
183 UNITS_TIME_STEP.addUnit(new FixedPrecisionUnit("s", 0.01));
184 UNITS_TIME_STEP.setDefaultUnit(1);
186 UNITS_SHORT_TIME = new UnitGroup();
187 UNITS_SHORT_TIME.addUnit(new GeneralUnit(1, "s"));
189 UNITS_FLIGHT_TIME = new UnitGroup();
190 UNITS_FLIGHT_TIME.addUnit(new GeneralUnit(1, "s"));
191 UNITS_FLIGHT_TIME.addUnit(new GeneralUnit(60, "min"));
193 UNITS_ROLL = new UnitGroup();
194 UNITS_ROLL.addUnit(new GeneralUnit(1, "rad/s"));
195 UNITS_ROLL.addUnit(new GeneralUnit(2 * Math.PI, "r/s"));
196 UNITS_ROLL.addUnit(new GeneralUnit(2 * Math.PI / 60, "rpm"));
197 UNITS_ROLL.setDefaultUnit(1);
199 UNITS_TEMPERATURE = new UnitGroup();
200 UNITS_TEMPERATURE.addUnit(new FixedPrecisionUnit("K", 1));
201 UNITS_TEMPERATURE.addUnit(new TemperatureUnit(1, 273.15, DEGREE + "C"));
202 UNITS_TEMPERATURE.addUnit(new TemperatureUnit(5.0 / 9.0, 459.67, DEGREE + "F"));
203 UNITS_TEMPERATURE.setDefaultUnit(1);
205 UNITS_PRESSURE = new UnitGroup();
206 UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("mbar", 1, 1.0e2));
207 UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("bar", 0.001, 1.0e5));
208 UNITS_PRESSURE.addUnit(new FixedPrecisionUnit("atm", 0.001, 1.01325e5));
209 UNITS_PRESSURE.addUnit(new GeneralUnit(101325.0 / 760.0, "mmHg"));
210 UNITS_PRESSURE.addUnit(new GeneralUnit(3386.389, "inHg"));
211 UNITS_PRESSURE.addUnit(new GeneralUnit(6894.75729, "psi"));
212 UNITS_PRESSURE.addUnit(new GeneralUnit(1, "Pa"));
214 UNITS_RELATIVE = new UnitGroup();
215 UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + ZWSP, 0.01, 1.0));
216 UNITS_RELATIVE.addUnit(new GeneralUnit(0.01, "%"));
217 UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + PERMILLE, 1, 0.001));
218 // UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + ZWSP, 0.01, 1.0));
219 // UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("%", 1, 0.01));
220 // UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("" + PERMILLE, 1, 0.001));
221 UNITS_RELATIVE.setDefaultUnit(1);
224 UNITS_ROUGHNESS = new UnitGroup();
225 UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.000001, MICRO + "m"));
226 UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.0000254, "mil"));
229 UNITS_COEFFICIENT = new UnitGroup();
230 UNITS_COEFFICIENT.addUnit(new FixedPrecisionUnit("" + ZWSP, 0.01)); // zero-width space
233 // This is not used by OpenRocket, and not extensively tested:
234 // UNITS_FREQUENCY = new UnitGroup();
235 // UNITS_FREQUENCY.addUnit(new GeneralUnit(1, "s"));
236 // UNITS_FREQUENCY.addUnit(new GeneralUnit(0.001, "ms"));
237 // UNITS_FREQUENCY.addUnit(new GeneralUnit(0.000001, MICRO + "s"));
238 // UNITS_FREQUENCY.addUnit(new FrequencyUnit(1, "Hz"));
239 // UNITS_FREQUENCY.addUnit(new FrequencyUnit(1000, "kHz"));
240 // UNITS_FREQUENCY.setDefaultUnit(3);
243 HashMap<String, UnitGroup> map = new HashMap<String, UnitGroup>();
244 map.put("NONE", UNITS_NONE);
245 map.put("LENGTH", UNITS_LENGTH);
246 map.put("MOTOR_DIMENSIONS", UNITS_MOTOR_DIMENSIONS);
247 map.put("DISTANCE", UNITS_DISTANCE);
248 map.put("VELOCITY", UNITS_VELOCITY);
249 map.put("ACCELERATION", UNITS_ACCELERATION);
250 map.put("AREA", UNITS_AREA);
251 map.put("STABILITY", UNITS_STABILITY);
252 map.put("MASS", UNITS_MASS);
253 map.put("INERTIA", UNITS_INERTIA);
254 map.put("ANGLE", UNITS_ANGLE);
255 map.put("DENSITY_BULK", UNITS_DENSITY_BULK);
256 map.put("DENSITY_SURFACE", UNITS_DENSITY_SURFACE);
257 map.put("DENSITY_LINE", UNITS_DENSITY_LINE);
258 map.put("FORCE", UNITS_FORCE);
259 map.put("IMPULSE", UNITS_IMPULSE);
260 map.put("TIME_STEP", UNITS_TIME_STEP);
261 map.put("SHORT_TIME", UNITS_SHORT_TIME);
262 map.put("FLIGHT_TIME", UNITS_FLIGHT_TIME);
263 map.put("ROLL", UNITS_ROLL);
264 map.put("TEMPERATURE", UNITS_TEMPERATURE);
265 map.put("PRESSURE", UNITS_PRESSURE);
266 map.put("RELATIVE", UNITS_RELATIVE);
267 map.put("ROUGHNESS", UNITS_ROUGHNESS);
268 map.put("COEFFICIENT", UNITS_COEFFICIENT);
270 UNITS = Collections.unmodifiableMap(map);
273 public static void setDefaultMetricUnits() {
274 UNITS_LENGTH.setDefaultUnit("cm");
275 UNITS_MOTOR_DIMENSIONS.setDefaultUnit("mm");
276 UNITS_DISTANCE.setDefaultUnit("m");
277 UNITS_AREA.setDefaultUnit("cm" + SQUARED);
278 UNITS_STABILITY.setDefaultUnit("cal");
279 UNITS_VELOCITY.setDefaultUnit("m/s");
280 UNITS_ACCELERATION.setDefaultUnit("m/s" + SQUARED);
281 UNITS_MASS.setDefaultUnit("g");
282 UNITS_INERTIA.setDefaultUnit("kg" + DOT + "m" + SQUARED);
283 UNITS_ANGLE.setDefaultUnit("" + DEGREE);
284 UNITS_DENSITY_BULK.setDefaultUnit("g/cm" + CUBED);
285 UNITS_DENSITY_SURFACE.setDefaultUnit("g/m" + SQUARED);
286 UNITS_DENSITY_LINE.setDefaultUnit("g/m");
287 UNITS_FORCE.setDefaultUnit("N");
288 UNITS_IMPULSE.setDefaultUnit("Ns");
289 UNITS_TIME_STEP.setDefaultUnit("s");
290 UNITS_FLIGHT_TIME.setDefaultUnit("s");
291 UNITS_ROLL.setDefaultUnit("r/s");
292 UNITS_TEMPERATURE.setDefaultUnit(DEGREE + "C");
293 UNITS_PRESSURE.setDefaultUnit("mbar");
294 UNITS_RELATIVE.setDefaultUnit("%");
295 UNITS_ROUGHNESS.setDefaultUnit(MICRO + "m");
298 public static void setDefaultImperialUnits() {
299 UNITS_LENGTH.setDefaultUnit("in");
300 UNITS_MOTOR_DIMENSIONS.setDefaultUnit("in");
301 UNITS_DISTANCE.setDefaultUnit("ft");
302 UNITS_AREA.setDefaultUnit("in" + SQUARED);
303 UNITS_STABILITY.setDefaultUnit("cal");
304 UNITS_VELOCITY.setDefaultUnit("ft/s");
305 UNITS_ACCELERATION.setDefaultUnit("ft/s" + SQUARED);
306 UNITS_MASS.setDefaultUnit("oz");
307 UNITS_INERTIA.setDefaultUnit("lb" + DOT + "ft" + SQUARED);
308 UNITS_ANGLE.setDefaultUnit("" + DEGREE);
309 UNITS_DENSITY_BULK.setDefaultUnit("oz/in" + CUBED);
310 UNITS_DENSITY_SURFACE.setDefaultUnit("oz/ft" + SQUARED);
311 UNITS_DENSITY_LINE.setDefaultUnit("oz/ft");
312 UNITS_FORCE.setDefaultUnit("N");
313 UNITS_IMPULSE.setDefaultUnit("Ns");
314 UNITS_TIME_STEP.setDefaultUnit("s");
315 UNITS_FLIGHT_TIME.setDefaultUnit("s");
316 UNITS_ROLL.setDefaultUnit("r/s");
317 UNITS_TEMPERATURE.setDefaultUnit(DEGREE + "F");
318 UNITS_PRESSURE.setDefaultUnit("mbar");
319 UNITS_RELATIVE.setDefaultUnit("%");
320 UNITS_ROUGHNESS.setDefaultUnit("mil");
325 * Return a UnitGroup for stability units based on the rocket.
327 * @param rocket the rocket from which to calculate the caliber
328 * @return the unit group
330 public static UnitGroup stabilityUnits(Rocket rocket) {
331 return new StabilityUnitGroup(rocket);
336 * Return a UnitGroup for stability units based on the rocket configuration.
338 * @param config the rocket configuration from which to calculate the caliber
339 * @return the unit group
341 public static UnitGroup stabilityUnits(Configuration config) {
342 return new StabilityUnitGroup(config);
347 * Return a UnitGroup for stability units based on a constant caliber.
349 * @param reference the constant reference length
350 * @return the unit group
352 public static UnitGroup stabilityUnits(double reference) {
353 return new StabilityUnitGroup(reference);
357 //////////////////////////////////////////////////////
360 protected ArrayList<Unit> units = new ArrayList<Unit>();
361 protected int defaultUnit = 0;
363 public int getUnitCount() {
367 public Unit getDefaultUnit() {
368 return units.get(defaultUnit);
371 public int getDefaultUnitIndex() {
375 public void setDefaultUnit(int n) {
376 if (n < 0 || n >= units.size()) {
377 throw new IllegalArgumentException("index out of range: " + n);
385 * Find a unit by approximate unit name. Only letters and (ordinary) numbers are
386 * considered in the matching. This method is mainly means for testing, allowing
387 * a simple means to obtain a particular unit.
389 * @param str the unit name.
390 * @return the corresponding unit, or <code>null</code> if not found.
392 public Unit findApproximate(String str) {
393 str = str.replaceAll("\\W", "").trim();
394 for (Unit u : units) {
395 String name = u.getUnit().replaceAll("\\W", "").trim();
396 if (str.equalsIgnoreCase(name))
403 * Set the default unit based on the unit name. Throws an exception if a
404 * unit with the provided name is not available.
406 * @param name the unit name.
407 * @throws IllegalArgumentException if the corresponding unit is not found in the group.
409 public void setDefaultUnit(String name) throws IllegalArgumentException {
410 for (int i = 0; i < units.size(); i++) {
411 if (units.get(i).getUnit().equals(name)) {
416 throw new IllegalArgumentException("name=" + name);
420 public Unit getUnit(int n) {
424 public int getUnitIndex(Unit u) {
425 return units.indexOf(u);
428 private void addUnit(Unit u) {
432 public boolean contains(Unit u) {
433 return units.contains(u);
436 public Unit[] getUnits() {
437 return units.toArray(new Unit[0]);
442 * Return the value formatted by the default unit of this group.
443 * It is the same as calling <code>getDefaultUnit().toString(value)</code>.
445 * @param value the SI value to format.
446 * @return the formatted string.
447 * @see Unit#toString(double)
449 public String toString(double value) {
450 return this.getDefaultUnit().toString(value);
455 * Return the value formatted by the default unit of this group including the unit.
456 * It is the same as calling <code>getDefaultUnit().toStringUnit(value)</code>.
458 * @param value the SI value to format.
459 * @return the formatted string.
460 * @see Unit#toStringUnit(double)
462 public String toStringUnit(double value) {
463 return this.getDefaultUnit().toStringUnit(value);
471 * Creates a new Value object with the specified value and the default unit of this group.
473 * @param value the value to set.
474 * @return a new Value object.
476 public Value toValue(double value) {
477 return this.getDefaultUnit().toValue(value);
483 private static final Pattern STRING_PATTERN = Pattern.compile("^\\s*([0-9.,-]+)(.*?)$");
486 * Converts a string into an SI value. If the string has one of the units in this
487 * group appended to it, that unit will be used in conversion. Otherwise the default
488 * unit will be used. If an unknown unit is specified or the value does not parse
489 * with <code>Double.parseDouble</code> then a <code>NumberFormatException</code>
492 * This method is applicable only for simple units without e.g. powers.
494 * @param str the string to parse.
495 * @return the SI value.
496 * @throws NumberFormatException if the string cannot be parsed.
498 public double fromString(String str) {
499 Matcher matcher = STRING_PATTERN.matcher(str);
501 if (!matcher.matches()) {
502 throw new NumberFormatException("string did not match required pattern");
505 double value = Double.parseDouble(matcher.group(1));
506 String unit = matcher.group(2).trim();
508 if (unit.equals("")) {
509 value = this.getDefaultUnit().fromUnit(value);
512 for (i = 0; i < units.size(); i++) {
513 Unit u = units.get(i);
514 if (unit.equalsIgnoreCase(u.getUnit())) {
515 value = u.fromUnit(value);
519 if (i >= units.size()) {
520 throw new NumberFormatException("unknown unit " + unit);
528 ///////////////////////////
532 * A private class that switches the CaliberUnit to a rocket-specific CaliberUnit.
533 * All other methods are passed through to UNITS_STABILITY.
535 private static class StabilityUnitGroup extends UnitGroup {
537 public StabilityUnitGroup(double ref) {
538 this(new CaliberUnit(ref));
541 public StabilityUnitGroup(Rocket rocket) {
542 this(new CaliberUnit(rocket));
545 public StabilityUnitGroup(Configuration config) {
546 this(new CaliberUnit(config));
549 private StabilityUnitGroup(CaliberUnit caliberUnit) {
550 this.units.addAll(UnitGroup.UNITS_STABILITY.units);
551 this.defaultUnit = UnitGroup.UNITS_STABILITY.defaultUnit;
552 for (int i = 0; i < units.size(); i++) {
553 if (units.get(i) instanceof CaliberUnit) {
554 units.set(i, caliberUnit);
561 public void setDefaultUnit(int n) {
562 super.setDefaultUnit(n);
563 UNITS_STABILITY.setDefaultUnit(n);