Aufgabenblatt 6
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angabe/Aufgabenblatt6.md
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# Aufgabenblatt 6
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## Allgemeine Anmerkungen
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Ihre Lösung für dieses Aufgabenblatt ist bis Montag, 23.5. 11h durch `git commit` und `git push`
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abzugeben. Mit der Angabe werden die Dateien `MassiveIterable.java`, `MassiveIterator.java`,
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`MassiveSet.java`, `MassiveForceTreeMap.java`, `Simulation6.java` und `Aufgabe6Test.java`
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mitgeliefert.
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Wenn Sie zusätzlich zu den gefragten Klassen weitere Klassen definieren, achten Sie darauf, dass
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die Klassennamen mit `My` beginnen, um Konflikte mit späteren Aufgabenblättern zu vermeiden.
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## Ziel
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Ziel der Aufgabe ist die Anwendung der Konzepte: Iterator, Kopie vs. Sichtweise, Sortieren
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(siehe Skriptum Seite 91-109).
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## Beschreibung der gegebenen Dateien
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- [MassiveIterable](../src/MassiveIterable.java) ist ein Interface, das iterierbare Objekte mit
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Elementen vom Typ `Massive` spezifiziert. Verändern Sie diese Datei bitte nicht.
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- [MassiveIterator](../src/MassiveIterator.java) ist ein Interface, das einen Iterator über
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Elemente vom Typ `Massive` spezifiziert. Verändern Sie diese Datei bitte nicht.
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- [MassiveSet](../src/MassiveSet.java) ist ein Interface, das iterierbare Mengen mit
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`Massive`-Elementen spezifiziert. Verändern Sie diese Datei bitte nicht.
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- [MassiveForceTreeMap](../src/MassiveForceTreeMap.java) ist das Gerüst für eine Implementierung
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einer assoziativen Datenstruktur, die ein `Massive`-Objekt mit der auf das Objekt wirkenden Kraft
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assoziiert.
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- [Simulation6](../src/Simulation6.java) ist ein Gerüst für eine ausführbare Klasse. Hier soll
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die Simulation analog zur Klasse `Simulation` implementiert werden (damit Sie Ihre [ursprüngliche
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Datei](../src/Simulation.java) nicht überschreiben müssen).
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- [Aufgabe6Test](../src/Aufgabe6Test.java) ist eine vorgegebene Klasse, die Sie zum Testen Ihrer
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Implementierung verwenden sollten. Bei einer fehlerfreien Implementierung sollten bei der
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Ausführung dieser Klasse keine Exceptions geworfen werden und alle Tests als erfolgreich ("successful")
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ausgegeben werden. Entfernen Sie die Kommentarzeichen, um diese Klasse verwenden zu können. Sie
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müssen diese Klasse nicht weiter verändern, können aber eigene Testfälle hinzufügen.
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## Aufgaben
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Ihre Aufgaben sind folgende:
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**1. Implementieren Sie die Klasse `MassiveForceTreeMap`.**
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Implementieren Sie die Klasse `MassiveForceTreeMap`. `MassiveForceTreeMap` ist wie
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`BodyForceTreeMap` aufgebaut, mit dem Unterschied, dass der Typ des Schlüssels statt `Body` nun
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der Typ `Massive` ist. Weiters soll die Klasse Methode `getKeys()` zur Verfügung stellen,
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die eine `MassiveSet`-Sichtweise auf die Menge der Schlüssel liefert. Änderungen an dem
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zurückgelieferten `MassiveSet`-Objekt wirken sich auf das zugrunde
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liegende `MassiveForceTreeMap`-Objekt aus. Die Methode `toList()` liefert dagegen eine
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unabhängige Liste (Kopie) mit allen Schlüsseln der Map. Für die Implementierung von
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`MassiveSet` können Sie einen eigenen Klassennamen beginnend mit `My` wählen. Die Definition kann
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in einer eigenen Datei oder in der Datei `MassiveForceTreeMap.java` erfolgen.
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**2. Adaptieren Sie die Klasse `HierarchicalSystem`:**
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Die Klasse `HierarchicalSystem` soll so geändert werden, dass sie das gegebene
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Interface `MassiveIterable` implementiert. Die Reihenfolge der vom Iterator gelieferten
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Elemente ist nicht festgelegt. Sie dürfen für die Implementierung bei Bedarf Ihren Klassen
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`NamedBodyForcePair` und `HierarchicalSystem` neue, nicht angegebene Methoden hinzufügen.
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Die Verwendung von Klassen des Java-Collection-Frameworks (z.B. java.util.Stack) ist erlaubt
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(aber nicht notwendig).
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**3. Implementierung von `Simulation6`:**
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Implementieren Sie die Simulationsschleife unter Verwendung eines Objekts vom Typ
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`MassiveForceTreeMap`. Die Methode `getKeys()` hilft beim Iterieren der gespeicherten Schlüssel.
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Kollisionen von Himmelskörpern müssen in dieser Simulation nicht berücksichtigt werden.
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#### _Punkteaufteilung_
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- Implementierung von `MassiveForceTreeMap`: 3 Punkte
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- Implementierung von `MassiveIterable` in `HierarchicalSystem`: 1.5 Punkte
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- Implementierung von `Simulation6`: 0.5 Punkte
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- Gesamt: 5 Punkte
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180
src/Aufgabe6Test.java
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src/Aufgabe6Test.java
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import java.util.HashSet;
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public class Aufgabe6Test {
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public static void main(String[] args) {
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/* //TODO: uncomment for testing
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NamedBody sun1, mercury1, venus1, earth1, moon1, mars1, deimos1, phobos1, vesta1,
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pallas1, hygiea1, ceres1;
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// create the same 12 named body-force pairs
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sun1 = new NamedBody("Sun",1.989E30, new Vector3(0.0,0.0,0.0)
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, new Vector3(0.0,0.0,0.0));
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earth1 = new NamedBody("Earth",5.972E24,
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new Vector3(-6.13135922534815E10,-1.383789852227691E11,2.719682263474911E7), new Vector3(26832.720535473603,-11948.23168764519,1.9948243075997851));
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moon1 = new NamedBody("Moon",7.349E22,
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new Vector3(-6.132484773775896E10,-1.387394951280871E11,1.701046736294776E7), new Vector3(27916.62329282941,-12020.39526008238,-94.89703264508708));
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mars1 = new NamedBody("Mars",6.41712E23,
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new Vector3(-1.7923193702925848E11,1.726665823982123E11,7.991673845249474E9), new Vector3(-15925.78496403673,-15381.16179928219,68.67560910598857));
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deimos1 = new NamedBody("Deimos",1.8E20,
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new Vector3(-1.792255010450533E11,1.726891122683271E11,7.990659337380297E9), new Vector3(-17100.476719804457,-15020.348656808,631.2927851249581));
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phobos1 = new NamedBody("Phobos",1.08E20,
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new Vector3(-1.792253482539647E11,1.72661109673625E11,7.987848354800322E9), new Vector3(-14738.203714241401,-13671.17675223948,-411.0012490555253));
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mercury1 = new NamedBody("Mercury",3.301E23,
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new Vector3(-5.167375560011926E10,-4.217574885682655E10,1.14808913958168E9), new Vector3(21580.25398577148,-34951.03632847389,-4835.225596525241));
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venus1 = new NamedBody("Venus",4.86747E24,
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new Vector3(-3.123150865740532E10,1.0395568504115701E11,3.173401325838074E9), new Vector3(-33748.180519629335,-10014.25141045021,1809.94488874165));
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vesta1 = new NamedBody("Vesta",2.5908E20,
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new Vector3(-3.337493557929893E11,-4.7147908276077385E10,4.1923010146878105E10), new Vector3(4440.54247538484,-19718.49074006637,48.06573124543601));
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pallas1 = new NamedBody("Pallas",2.14E20,
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new Vector3(4.3452066613895575E11,-2.057319365171432E11,1.0549957423213101E11), new Vector3(5058.947582097117,11184.45711782372,-8183.524138259704));
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hygiea1 = new NamedBody("Hygiea",8.32E19,
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new Vector3(-3.983943433707043E11,2.325833000024021E11,-2.233667695713672E10), new Vector3(-6931.864585548552,-15686.8108598699,-690.5791992347208));
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ceres1 = new NamedBody("Ceres",9.394E20,
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new Vector3(3.781372641419032E11,1.96718960466285E11,-6.366459168068592E10), new Vector3(-8555.324226752316,14718.33755980907,2040.230135060142));
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// check basic functions of 'MassiveForceHashMap'
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MassiveForceTreeMap map = new MassiveForceTreeMap();
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map.put(sun1, new Vector3(0,0,0));
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map.put(mercury1, new Vector3(0,0,0));
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map.put(venus1, new Vector3(0,0,0));
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map.put(earth1, new Vector3(0,0,0));
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map.put(moon1, new Vector3(0,0,0));
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map.put(mars1, new Vector3(0,0,0));
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map.put(deimos1, new Vector3(0,0,0));
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map.put(phobos1, new Vector3(0,0,0));
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map.put(vesta1, new Vector3(0,0,0));
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map.put(pallas1, new Vector3(0,0,0));
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map.put(hygiea1, new Vector3(0,0,0));
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map.put(ceres1, new Vector3(0,0,0));
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map.put(mars1, new Vector3(0,0,0)); // inserted twice
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HashSet<Massive> set1 = new HashSet<>();
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set1.add(sun1);
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set1.add(mercury1);
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set1.add(venus1);
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set1.add(earth1);
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set1.add(moon1);
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set1.add(mars1);
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set1.add(deimos1);
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set1.add(phobos1);
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set1.add(vesta1);
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set1.add(pallas1);
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set1.add(hygiea1);
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set1.add(ceres1);
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System.out.println("Test1:");
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testValue(map.toString().contains("Mars"), true);
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testValue(map.toString().contains("Deimos"), true);
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testValue(map.toString().contains("Moon"), true);
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testValue(map.toString().contains("Earth"), true);
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System.out.println("Test2:");
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testValue(map.getKeys().size(), 12);
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System.out.println("Test3:");
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testValue(map.getKeys().contains(mars1), true);
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testValue(map.getKeys().contains(new NamedBody("Mars",6.41712E23,
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new Vector3(0,0,0),
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new Vector3(0,0,0))), true);
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testValue(map.getKeys().contains(new Body(6.41712E23,
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new Vector3(0,0,0),
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new Vector3(0,0,0))), false);
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System.out.println("Test4:");
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HashSet<Massive> set2 = new HashSet<>();
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for(Massive m: map.getKeys()) {
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set2.add(m);
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}
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testValue(set1.equals(set2), true);
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System.out.println("Test5:");
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MassiveLinkedList list = map.getKeys().toList();
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while (list.size() > 0) {
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set1.remove(list.pollLast());
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}
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testValue(set1.isEmpty(), true);
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System.out.println("Test6:");
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map.getKeys().remove(mars1);
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testValue(map.containsKey(mars1), false);
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testValue(map.getKeys().size(), 11);
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map.getKeys().clear();
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testValue(map.getKeys().size(), 0);
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System.out.println("Test7:");
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NamedBodyForcePair sun2, mercury2, venus2, earth2, moon2, mars2, deimos2, phobos2, vesta2,
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pallas2, hygiea2, ceres2;
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//test classes NamedBody and MassiveForceHashMap
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// create 12 named bodies
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// create the same 12 named body-force pairs
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sun2 = new NamedBodyForcePair("Sun",1.989E30, new Vector3(0.0,0.0,0.0)
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, new Vector3(0.0,0.0,0.0));
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earth2 = new NamedBodyForcePair("Earth",5.972E24,
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new Vector3(-6.13135922534815E10,-1.383789852227691E11,2.719682263474911E7), new Vector3(26832.720535473603,-11948.23168764519,1.9948243075997851));
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moon2 = new NamedBodyForcePair("Moon",7.349E22,
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new Vector3(-6.132484773775896E10,-1.387394951280871E11,1.701046736294776E7), new Vector3(27916.62329282941,-12020.39526008238,-94.89703264508708));
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mars2 = new NamedBodyForcePair("Mars",6.41712E23,
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new Vector3(-1.7923193702925848E11,1.726665823982123E11,7.991673845249474E9), new Vector3(-15925.78496403673,-15381.16179928219,68.67560910598857));
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deimos2 = new NamedBodyForcePair("Deimos",1.8E20,
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new Vector3(-1.792255010450533E11,1.726891122683271E11,7.990659337380297E9), new Vector3(-17100.476719804457,-15020.348656808,631.2927851249581));
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phobos2 = new NamedBodyForcePair("Phobos",1.08E20,
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new Vector3(-1.792253482539647E11,1.72661109673625E11,7.987848354800322E9), new Vector3(-14738.203714241401,-13671.17675223948,-411.0012490555253));
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mercury2 = new NamedBodyForcePair("Mercury",3.301E23,
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new Vector3(-5.167375560011926E10,-4.217574885682655E10,1.14808913958168E9), new Vector3(21580.25398577148,-34951.03632847389,-4835.225596525241));
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venus2 = new NamedBodyForcePair("Venus",4.86747E24,
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new Vector3(-3.123150865740532E10,1.0395568504115701E11,3.173401325838074E9), new Vector3(-33748.180519629335,-10014.25141045021,1809.94488874165));
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vesta2 = new NamedBodyForcePair("Vesta",2.5908E20,
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new Vector3(-3.337493557929893E11,-4.7147908276077385E10,4.1923010146878105E10), new Vector3(4440.54247538484,-19718.49074006637,48.06573124543601));
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pallas2 = new NamedBodyForcePair("Pallas",2.14E20,
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new Vector3(4.3452066613895575E11,-2.057319365171432E11,1.0549957423213101E11), new Vector3(5058.947582097117,11184.45711782372,-8183.524138259704));
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hygiea2 = new NamedBodyForcePair("Hygiea",8.32E19,
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new Vector3(-3.983943433707043E11,2.325833000024021E11,-2.233667695713672E10), new Vector3(-6931.864585548552,-15686.8108598699,-690.5791992347208));
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ceres2 = new NamedBodyForcePair("Ceres",9.394E20,
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new Vector3(3.781372641419032E11,1.96718960466285E11,-6.366459168068592E10), new Vector3(-8555.324226752316,14718.33755980907,2040.230135060142));
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CosmicSystem earthSystem = new HierarchicalSystem(earth2, moon2);
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CosmicSystem marsSystem = new HierarchicalSystem(mars2, deimos2, phobos2);
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HierarchicalSystem solarSystem = new HierarchicalSystem(sun2, mercury2, venus2, earthSystem,
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marsSystem, vesta2, pallas2, hygiea2, ceres2);
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int count = 0;
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for (Massive b: solarSystem) {
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count++;
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}
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testValue(count, 12);
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*/ //TODO: uncomment
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}
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public static void testComparison(Object first, Object second, boolean expected) {
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boolean real = first == second;
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if (real == expected) {
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System.out.println("Successful comparison");
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} else {
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System.out.println("Comparison NOT successful! Expected value: " + expected + " / Given value: " + real);
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}
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}
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public static void testValue(Object given, Object expected) {
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if (given == expected) {
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System.out.println("Successful test");
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} else {
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System.out.println("Test NOT successful! Expected value: " + expected + " / Given value: " + given);
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}
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}
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public static void testValue(double given, double expected) {
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if (given < expected + (expected + 1) / 1e12 && given > expected - (expected + 1) / 1e12) {
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System.out.println("Successful test");
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} else {
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System.out.println("Test NOT successful! Expected value: " + expected + " / Given value: " + given);
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}
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}
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}
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56
src/MassiveForceTreeMap.java
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src/MassiveForceTreeMap.java
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// A map that associates an object of 'Massive' with a Vector3. The number of key-value pairs
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// is not limited.
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//
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// TODO: define further classes and methods for the binary search tree and the implementation
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// of MassiveSet, if needed.
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//
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public class MassiveForceTreeMap {
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// TODO: define missing parts of this class.
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// Adds a new key-value association to this map. If the key already exists in this map,
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// the value is replaced and the old value is returned. Otherwise 'null' is returned.
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// Precondition: key != null.
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public Vector3 put(Massive key, Vector3 value) {
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// TODO: implement method.
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return null;
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}
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// Returns the value associated with the specified key, i.e. the method returns the force vector
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// associated with the specified key. Returns 'null' if the key is not contained in this map.
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// Precondition: key != null.
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public Vector3 get(Massive key) {
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// TODO: implement method.
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return null;
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}
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// Returns 'true' if this map contains a mapping for the specified key.
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//Precondition: key != null
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public boolean containsKey(Massive key) {
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// TODO: implement method.
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return false;
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}
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// Returns a readable representation of this map, in which key-value pairs are ordered
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// descending according to 'key.getMass()'.
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public String toString() {
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// TODO: implement method.
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return "";
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}
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// Returns a `MassiveSet` view of the keys contained in this tree map. Changing the
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// elements of the returned `MassiveSet` object also affects the keys in this tree map.
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public MassiveSet getKeys() {
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// TODO: implement method.
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return null;
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}
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||||
}
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||||
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//TODO: Define additional class(es) implementing the binary search tree and the implementation
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// of MassiveSet (either here or in a separate file).
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8
src/MassiveIterable.java
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8
src/MassiveIterable.java
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// Iterable objects with 'Massive' elements.
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||||
//
|
||||
public interface MassiveIterable extends Iterable<Massive> {
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||||
|
||||
@Override
|
||||
// Returns an iterator over elements of 'Massive'.
|
||||
MassiveIterator iterator();
|
||||
}
|
15
src/MassiveIterator.java
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src/MassiveIterator.java
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import java.util.Iterator;
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||||
|
||||
// An iterator over elements of 'Massive'.
|
||||
//
|
||||
public interface MassiveIterator extends Iterator<Massive> {
|
||||
|
||||
@Override
|
||||
// Returns the next element in the iteration.
|
||||
// (Returns 'null' if the iteration has no more elements.)
|
||||
Massive next();
|
||||
|
||||
@Override
|
||||
// Returns 'true' if the iteration has more elements.
|
||||
boolean hasNext();
|
||||
}
|
21
src/MassiveSet.java
Normal file
21
src/MassiveSet.java
Normal file
@ -0,0 +1,21 @@
|
||||
// A collection of 'Massive' objects in which there are no duplicates.
|
||||
//
|
||||
public interface MassiveSet extends MassiveIterable, Drawable {
|
||||
|
||||
// Returns 'true' if the set has the specified element (i.e., has an element equal to the
|
||||
// specified element).
|
||||
boolean contains(Massive element);
|
||||
|
||||
// Removes the specified element from the set.
|
||||
void remove(Massive element);
|
||||
|
||||
// Removes all elements from the set.
|
||||
void clear();
|
||||
|
||||
// Returns the number of elements in the set.
|
||||
int size();
|
||||
|
||||
// Returns an object of 'MassiveLinkedList' with all elements of 'this'.
|
||||
MassiveLinkedList toList();
|
||||
|
||||
}
|
68
src/Simulation6.java
Normal file
68
src/Simulation6.java
Normal file
@ -0,0 +1,68 @@
|
||||
import codedraw.CodeDraw;
|
||||
|
||||
import java.awt.*;
|
||||
import java.util.Random;
|
||||
|
||||
// Simulates the formation of a massive solar system.
|
||||
//
|
||||
public class Simulation6 {
|
||||
|
||||
// gravitational constant
|
||||
public static final double G = 6.6743e-11;
|
||||
|
||||
// one astronomical unit (AU) is the average distance of earth to the sun.
|
||||
public static final double AU = 150e9; // meters
|
||||
|
||||
// one light year
|
||||
public static final double LY = 9.461e15; // meters
|
||||
|
||||
// some further constants needed in the simulation
|
||||
public static final double SUN_MASS = 1.989e30; // kilograms
|
||||
public static final double SUN_RADIUS = 696340e3; // meters
|
||||
public static final double EARTH_MASS = 5.972e24; // kilograms
|
||||
public static final double EARTH_RADIUS = 6371e3; // meters
|
||||
|
||||
// set some system parameters
|
||||
public static final double SECTION_SIZE = 10 * AU; // the size of the square region in space
|
||||
|
||||
public static final int NUMBER_OF_BODIES = 22;
|
||||
public static final double OVERALL_SYSTEM_MASS = 20 * SUN_MASS; // kilograms
|
||||
|
||||
// all quantities are based on units of kilogram respectively second and meter.
|
||||
|
||||
// The main simulation method using instances of other classes.
|
||||
public static void main(String[] args) {
|
||||
|
||||
// simulation
|
||||
CodeDraw cd = new CodeDraw();
|
||||
|
||||
// create solar system with 12 bodies
|
||||
NamedBody sun = new NamedBody("Sun",1.989E30, new Vector3(0.0,0.0,0.0), new Vector3(0.0,0.0,0.0));
|
||||
NamedBody earth = new NamedBody("Earth",5.972E24, new Vector3(-6.13135922534815E10,-1.383789852227691E11,2.719682263474911E7), new Vector3(26832.720535473603,-11948.23168764519,1.9948243075997851));
|
||||
NamedBody moon = new NamedBody("Moon",7.349E22, new Vector3(-6.132484773775896E10,-1.387394951280871E11,1.701046736294776E7), new Vector3(27916.62329282941,-12020.39526008238,-94.89703264508708));
|
||||
NamedBody mars = new NamedBody("Mars",6.41712E23, new Vector3(-1.7923193702925848E11,1.726665823982123E11,7.991673845249474E9), new Vector3(-15925.78496403673,-15381.16179928219,68.67560910598857));
|
||||
NamedBody deimos = new NamedBody("Deimos",1.8E20, new Vector3(-1.792255010450533E11,1.726891122683271E11,7.990659337380297E9), new Vector3(-17100.476719804457,-15020.348656808,631.2927851249581));
|
||||
NamedBody phobos = new NamedBody("Phobos",1.08E20, new Vector3(-1.792253482539647E11,1.72661109673625E11,7.987848354800322E9), new Vector3(-14738.203714241401,-13671.17675223948,-411.0012490555253));
|
||||
NamedBody mercury = new NamedBody("Mercury",3.301E23, new Vector3(-5.167375560011926E10,-4.217574885682655E10,1.14808913958168E9), new Vector3(21580.25398577148,-34951.03632847389,-4835.225596525241));
|
||||
NamedBody venus = new NamedBody("Venus",4.86747E24, new Vector3(-3.123150865740532E10,1.0395568504115701E11,3.173401325838074E9), new Vector3(-33748.180519629335,-10014.25141045021,1809.94488874165));
|
||||
NamedBody vesta = new NamedBody("Vesta",2.5908E20, new Vector3(-3.337493557929893E11,-4.7147908276077385E10,4.1923010146878105E10), new Vector3(4440.54247538484,-19718.49074006637,48.06573124543601));
|
||||
NamedBody pallas = new NamedBody("Pallas",2.14E20, new Vector3(4.3452066613895575E11,-2.057319365171432E11,1.0549957423213101E11), new Vector3(5058.947582097117,11184.45711782372,-8183.524138259704));
|
||||
NamedBody hygiea = new NamedBody("Hygiea",8.32E19, new Vector3(-3.983943433707043E11,2.325833000024021E11,-2.233667695713672E10), new Vector3(-6931.864585548552,-15686.8108598699,-690.5791992347208));
|
||||
NamedBody ceres = new NamedBody("Ceres",9.394E20, new Vector3(3.781372641419032E11,1.96718960466285E11,-6.366459168068592E10), new Vector3(-8555.324226752316,14718.33755980907,2040.230135060142));
|
||||
|
||||
// create some additional bodies
|
||||
Body[] bodies = new Body[NUMBER_OF_BODIES];
|
||||
|
||||
Random random = new Random(2022);
|
||||
|
||||
for (int i = 0; i < bodies.length; i++) {
|
||||
bodies[i] = new Body(Math.abs(random.nextGaussian()) * OVERALL_SYSTEM_MASS / bodies.length,
|
||||
new Vector3(0.2 * random.nextGaussian() * AU, 0.2 * random.nextGaussian() * AU, 0.2 * random.nextGaussian() * AU),
|
||||
new Vector3(0 + random.nextGaussian() * 5e3, 0 + random.nextGaussian() * 5e3, 0 + random.nextGaussian() * 5e3));
|
||||
}
|
||||
|
||||
//TODO: implementation of this method according to 'Aufgabenblatt6.md'.
|
||||
// Add both, NamedBody- and Body-objects, to your simulation.
|
||||
|
||||
}
|
||||
}
|
Reference in New Issue
Block a user