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AB8/3 + AB8/4

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Lorenz Stechauner
2022-06-07 14:36:07 +02:00
parent 150eb7aa49
commit a951b5c14a
7 changed files with 244 additions and 50 deletions
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13
src/Body.java
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@ -20,6 +20,19 @@ public class Body implements Massive {
this.currentMovement = new Vector3(other.currentMovement);
}
public Body(double mass) {
this(mass, new Vector3(), new Vector3());
}
public Body() {
this(0);
}
public void setState(Vector3 position, Vector3 velocity) {
this.massCenter = new Vector3(position);
this.currentMovement = new Vector3(velocity);
}
/**
* Returns the distance between the mass centers of this body and the specified body 'b'.
*/

46
src/NamedBody.java
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@ -1,43 +1,41 @@
import codedraw.CodeDraw;
public class NamedBody implements Massive {
public class NamedBody extends Body {
private final String name;
private final Body body;
/**
* Initializes this with name, mass, current position and movement.
*/
public NamedBody(String name, double mass, Vector3 massCenter, Vector3 currentMovement) {
this(name, new Body(mass, massCenter, currentMovement));
super(mass, massCenter, currentMovement);
this.name = name;
}
public NamedBody(String name, double mass) {
super(mass);
this.name = name;
}
public NamedBody(String name) {
super();
this.name = name;
}
public NamedBody(String name, Body body) {
super(body);
this.name = name;
this.body = body;
}
public NamedBody(NamedBody other) {
this(other.name, new Body(other.body));
super(other);
this.name = other.name;
}
/**
* Returns the name of the body.
*/
public String getName() {
return name;
}
public Body getBody() {
return body;
}
public Vector3 getMassCenter() {
return body.getMassCenter();
}
public double getMass() {
return body.getMass();
return this.name;
}
/**
@ -66,14 +64,4 @@ public class NamedBody implements Massive {
public String toString() {
return this.getName();
}
@Override
public void move(Vector3 force) {
body.move(force);
}
@Override
public void draw(CodeDraw cd) {
body.draw(cd);
}
}

6
src/NamedBodyForcePair.java
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@ -30,7 +30,7 @@ public class NamedBodyForcePair implements CosmicSystem {
}
public Body getBody() {
return body.getBody();
return body;
}
/**
@ -72,13 +72,13 @@ public class NamedBodyForcePair implements CosmicSystem {
@Override
public void addForceTo(CosmicSystem cs) {
cs.addForceFrom(body.getBody());
cs.addForceFrom(body);
}
@Override
public BodyLinkedList getBodies() {
BodyLinkedList list = new BodyLinkedList();
list.addFirst(body.getBody());
list.addFirst(body);
return list;
}

103
src/ReadDataUtil.java
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@ -1,7 +1,14 @@
import java.io.*;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ReadDataUtil {
private static final Pattern LINE_FORMAT = Pattern.compile("^\\d+(\\.\\d+)?, *[A-Za-z \\d:.-]+(, *[-+]?\\d+(\\.\\d+)?([eE][+-]?\\d+)?){6}, *$");
private static final Pattern DATE_COLUMN_FORMAT = Pattern.compile("^A\\.D\\. (?<year>\\d{4})-(?<month>[A-Z][a-z]{2})-(?<day>[0-3]\\d) \\d{2}:\\d{2}:\\d{2}(\\.\\d+)?$");
private static final Pattern DATE_FORMAT_YYYY_MMM_DD = Pattern.compile("^(?<year>\\d{4})-(?<month>[A-Z][a-z]{2})-(?<day>[0-3]\\d)$");
/**
* Reads the position and velocity vector on the specified 'day' from the file with the
* specified 'path', and sets position and current velocity of 'b' accordingly. If
@ -20,7 +27,101 @@ public class ReadDataUtil {
* Precondition: b != null, path != null, day != null and has the format YYYY-MM-DD.
*/
public static boolean readConfiguration(NamedBody b, String path, String day) throws IOException {
// TODO: implement this method.
State state = State.Pre;
try (BufferedInputStream in = new BufferedInputStream(new FileInputStream(path))) {
Scanner lines = new Scanner(in);
long lineNum = 0;
while (lines.hasNextLine() && state != State.Post) {
lineNum++;
String line = lines.nextLine();
State nextState = state.next(line);
if (state == State.In && nextState == State.In) {
Matcher m = LINE_FORMAT.matcher(line);
if (!m.matches()) {
throw new StateFileFormatException(path, lineNum);
}
String[] rows = line.split(", *");
String date;
try {
date = convertDateColumn(rows[1]);
} catch (IllegalArgumentException e) {
throw new StateFileFormatException(path, lineNum);
}
if (date.equals(day)) {
try {
double x = Double.parseDouble(rows[2]); // [km]
double y = Double.parseDouble(rows[3]); // [km]
double z = Double.parseDouble(rows[4]); // [km]
double vx = Double.parseDouble(rows[5]); // [km/s]
double vy = Double.parseDouble(rows[6]); // [km/s]
double vz = Double.parseDouble(rows[7]); // [km/s]
b.setState(new Vector3(x * 1000, y * 1000, z * 1000), new Vector3(vx * 1000, vy * 1000, vz * 1000));
} catch (NumberFormatException e) {
throw new StateFileFormatException(path, lineNum);
}
return true;
}
}
state = nextState;
}
} catch (IOException e) {
if (e instanceof FileNotFoundException) {
throw new StateFileNotFoundException(path);
} else {
throw e;
}
}
return false;
}
private static String convertDateColumn(String column) {
Matcher m = DATE_COLUMN_FORMAT.matcher(column);
if (!m.matches()) {
throw new IllegalArgumentException();
}
return m.group("year") + "-" + convertMonth(m.group("month")) + "-" + m.group("day");
}
public static String convertDate(String date) {
Matcher m = DATE_FORMAT_YYYY_MMM_DD.matcher(date);
if (!m.matches()) {
throw new IllegalArgumentException();
}
return m.group("year") + "-" + convertMonth(m.group("month")) + "-" + m.group("day");
}
private static String convertMonth(String month) {
return switch (month) {
case "Jan" -> "01";
case "Feb" -> "02";
case "Mar" -> "03";
case "Apr" -> "04";
case "May" -> "05";
case "Jun" -> "06";
case "Jul" -> "07";
case "Aug" -> "08";
case "Sep" -> "09";
case "Oct" -> "10";
case "Nov" -> "11";
case "Dec" -> "12";
default -> throw new IllegalArgumentException();
};
}
private enum State {
Pre, In, Post;
public State next(String line) {
switch (this) {
case Pre: if (line.equals("$$SOE")) return In; break;
case In: if (line.equals("$$EOE")) return Post; break;
case Post: break;
}
return this;
}
}
}

102
src/Simulation8.java
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@ -1,5 +1,8 @@
import codedraw.CodeDraw;
import java.awt.*;
import java.io.IOException;
/**
* Simulates the solar system.
*/
@ -18,31 +21,100 @@ public class Simulation8 {
// The main simulation method using instances of other classes.
public static void main(String[] args) {
if (args.length != 2) {
System.err.println("Error: wrong number of arguments.");
System.exit(1);
}
String statePath = args[0];
String date;
try {
date = ReadDataUtil.convertDate(args[1]);
} catch (IllegalArgumentException e) {
System.err.println("Error: State has wrong format (requires YYYY-MMM-DD), aborting.");
System.exit(2);
return;
}
// simulation
CodeDraw cd = new CodeDraw();
// create solar system with 13 bodies
MassiveForceTreeMap map = new MassiveForceTreeMap();
MassiveForceTreeMap forceOnBody = new MassiveForceTreeMap();
map.put(new NamedBody("Oumuamua", 8e6, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Earth", 5.972E24, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Moon", 7.349E22, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Mars1", 6.41712E23, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Deimos", 1.8E20, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Phobos", 1.08E20, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Mercury", 3.301E23, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Venus", 4.86747E24, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Vesta", 2.5908E20, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Pallas", 2.14E20, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Hygiea", 8.32E19, new Vector3(), new Vector3()), new Vector3());
map.put(new NamedBody("Ceres1", 9.394E20, new Vector3(), new Vector3()), new Vector3());
forceOnBody.put(new NamedBody("Oumuamua", 8e6), new Vector3());
forceOnBody.put(new NamedBody("Earth", 5.972E24), new Vector3());
forceOnBody.put(new NamedBody("Moon", 7.349E22), new Vector3());
forceOnBody.put(new NamedBody("Mars", 6.41712E23), new Vector3());
forceOnBody.put(new NamedBody("Deimos", 1.8E20), new Vector3());
forceOnBody.put(new NamedBody("Phobos", 1.08E20), new Vector3());
forceOnBody.put(new NamedBody("Mercury", 3.301E23), new Vector3());
forceOnBody.put(new NamedBody("Venus", 4.86747E24), new Vector3());
forceOnBody.put(new NamedBody("Vesta", 2.5908E20), new Vector3());
forceOnBody.put(new NamedBody("Pallas", 2.14E20), new Vector3());
forceOnBody.put(new NamedBody("Hygiea", 8.32E19), new Vector3());
forceOnBody.put(new NamedBody("Ceres", 9.394E20), new Vector3());
MassiveIterator iter = forceOnBody.getKeys().iterator();
while (iter.hasNext()) {
Massive a = iter.next();
if (a instanceof NamedBody b) {
boolean remove = false;
//TODO: implementation of this method according to 'Aufgabenblatt8.md'.
try {
boolean found = ReadDataUtil.readConfiguration(b, statePath + "/" + b.getName() + ".txt", date);
if (!found) {
System.err.println("Warning: State not available for " + b.getName() + ".");
remove = true;
}
} catch (IOException e) {
if (e instanceof StateFileNotFoundException notFound) {
System.err.println("Warning: " + notFound.getMessage());
} else if (e instanceof StateFileFormatException format) {
System.err.println("Warning: " + format.getMessage());
} else {
System.err.println("Error: " + e.getMessage());
System.exit(3);
}
remove = true;
}
if (remove) {
System.err.println("Running simulation without " + b.getName());
iter.remove();
}
}
}
// add sun after states have been read from files.
map.put(new NamedBody("Sun", 1.989E30, new Vector3(), new Vector3()), new Vector3());
forceOnBody.put(new NamedBody("Sun", 1.989E30), new Vector3());
System.out.println("Starting simulation");
long seconds = 0;
while (true) {
seconds++;
for (Massive b1 : forceOnBody.getKeys()) {
Vector3 force = new Vector3();
for (Massive b2 : forceOnBody.getKeys()) {
if (b1 != b2) {
force = force.plus(b1.gravitationalForce(b2));
}
}
forceOnBody.put(b1, force);
}
for (Massive body : forceOnBody.getKeys()) {
body.move(forceOnBody.get(body));
}
if ((seconds % 3600) == 0) {
cd.clear(Color.BLACK);
for (Massive body : forceOnBody.getKeys()) {
body.draw(cd);
}
cd.show();
}
}
}
}

15
src/StateFileFormatException.java
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@ -1,7 +1,20 @@
import java.io.IOException;
public class StateFileFormatException extends IOException {
private final String fileName;
private final long lineNum;
// TODO: implement class
public StateFileFormatException(String fileName, long lineNum) {
super("File " + fileName + " has illegal format (line " + lineNum + ")");
this.fileName = fileName;
this.lineNum = lineNum;
}
public String getFileName() {
return this.fileName;
}
public long getLineNum() {
return this.lineNum;
}
}

9
src/StateFileNotFoundException.java
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@ -1,7 +1,14 @@
import java.io.IOException;
public class StateFileNotFoundException extends IOException {
private final String fileName;
// TODO: implement class
public StateFileNotFoundException(String fileName) {
super("File " + fileName + " not found.");
this.fileName = fileName;
}
public String getFileName() {
return this.fileName;
}
}