lorenz.stechauner/EP2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Aufgabenblatt 4

Browse Source
This commit is contained in:
Anton Ertl
2022-04-25 10:15:53 +00:00
parent 95a4907dd2 ef01f2a0fc
commit 60ea5aa6f4
7 changed files with 469 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

205
src/Aufgabe4Test.java Normal file
View File

@ -0,0 +1,205 @@
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
public class Aufgabe4Test {
public static void main(String[] args) {
//TODO: uncomment for testing
/*
//test classes HierachicalSystem and NamedBodyForcePair
// create 12 bodies
Body sun1, earth1, moon1, mars1, deimos1, phobos1, mercury1, venus1, vesta1, pallas1,
hygiea1, ceres1;
NamedBodyForcePair sun2, mercury2, venus2, earth2, moon2, mars2, deimos2, phobos2, vesta2,
pallas2, hygiea2, ceres2;
sun1 = new Body(1.989E30, new Vector3(0.0,0.0,0.0), new Vector3(0.0,0.0,
0.0));
earth1 = new Body(5.972E24, new Vector3(-6.13135922534815E10,-1.383789852227691E11,
2.719682263474911E7), new Vector3(26832.720535473603,-11948.23168764519,1.9948243075997851));
moon1 = new Body(7.349E22, new Vector3(-6.132484773775896E10,-1.387394951280871E11,
1.701046736294776E7), new Vector3(27916.62329282941,-12020.39526008238,-94.89703264508708));
mars1 = new Body(6.41712E23, new Vector3(-1.7923193702925848E11,1.726665823982123E11
,7.991673845249474E9), new Vector3(-15925.78496403673,-15381.16179928219,68.67560910598857));
deimos1 = new Body(1.8E20, new Vector3(-1.792255010450533E11,1.726891122683271E11,
7.990659337380297E9), new Vector3(-17100.476719804457,-15020.348656808,631.2927851249581));
phobos1 = new Body(1.08E20, new Vector3(-1.792253482539647E11,1.72661109673625E11,
7.987848354800322E9), new Vector3(-14738.203714241401,-13671.17675223948,-411.0012490555253));
mercury1 = new Body(3.301E23, new Vector3(-5.167375560011926E10,
-4.217574885682655E10,1.14808913958168E9), new Vector3(21580.25398577148,-34951.03632847389,-4835.225596525241));
venus1 = new Body(4.86747E24, new Vector3(-3.123150865740532E10,
1.0395568504115701E11,3.173401325838074E9), new Vector3(-33748.180519629335,-10014.25141045021,1809.94488874165));
vesta1 = new Body(2.5908E20, new Vector3(-3.337493557929893E11,
-4.7147908276077385E10,4.1923010146878105E10), new Vector3(4440.54247538484,-19718.49074006637,48.06573124543601));
pallas1 = new Body(2.14E20, new Vector3(4.3452066613895575E11,-2.057319365171432E11,
1.0549957423213101E11), new Vector3(5058.947582097117,11184.45711782372,-8183.524138259704));
hygiea1 = new Body(8.32E19, new Vector3(-3.983943433707043E11,2.325833000024021E11,
-2.233667695713672E10), new Vector3(-6931.864585548552,-15686.8108598699,-690.5791992347208));
ceres1 = new Body(9.394E20, new Vector3(3.781372641419032E11,1.96718960466285E11,
-6.366459168068592E10), new Vector3(-8555.324226752316,14718.33755980907,2040.230135060142));
Body[] bodies = new Body[]{sun1, mercury1, venus1, earth1, moon1, mars1, deimos1, phobos1,
vesta1, pallas1, hygiea1, ceres1};
Vector3[] forceOnBody = new Vector3[bodies.length];
// create the same 12 named body-force pairs
sun2 = new NamedBodyForcePair("Sun",1.989E30, new Vector3(0.0,0.0,0.0)
, new Vector3(0.0,0.0,0.0));
earth2 = new NamedBodyForcePair("Earth",5.972E24,
new Vector3(-6.13135922534815E10,-1.383789852227691E11,2.719682263474911E7), new Vector3(26832.720535473603,-11948.23168764519,1.9948243075997851));
moon2 = new NamedBodyForcePair("Moon",7.349E22,
new Vector3(-6.132484773775896E10,-1.387394951280871E11,1.701046736294776E7), new Vector3(27916.62329282941,-12020.39526008238,-94.89703264508708));
mars2 = new NamedBodyForcePair("Mars",6.41712E23,
new Vector3(-1.7923193702925848E11,1.726665823982123E11,7.991673845249474E9), new Vector3(-15925.78496403673,-15381.16179928219,68.67560910598857));
deimos2 = new NamedBodyForcePair("Deimos",1.8E20,
new Vector3(-1.792255010450533E11,1.726891122683271E11,7.990659337380297E9), new Vector3(-17100.476719804457,-15020.348656808,631.2927851249581));
phobos2 = new NamedBodyForcePair("Phobos",1.08E20,
new Vector3(-1.792253482539647E11,1.72661109673625E11,7.987848354800322E9), new Vector3(-14738.203714241401,-13671.17675223948,-411.0012490555253));
mercury2 = new NamedBodyForcePair("Mercury",3.301E23,
new Vector3(-5.167375560011926E10,-4.217574885682655E10,1.14808913958168E9), new Vector3(21580.25398577148,-34951.03632847389,-4835.225596525241));
venus2 = new NamedBodyForcePair("Venus",4.86747E24,
new Vector3(-3.123150865740532E10,1.0395568504115701E11,3.173401325838074E9), new Vector3(-33748.180519629335,-10014.25141045021,1809.94488874165));
vesta2 = new NamedBodyForcePair("Vesta",2.5908E20,
new Vector3(-3.337493557929893E11,-4.7147908276077385E10,4.1923010146878105E10), new Vector3(4440.54247538484,-19718.49074006637,48.06573124543601));
pallas2 = new NamedBodyForcePair("Pallas",2.14E20,
new Vector3(4.3452066613895575E11,-2.057319365171432E11,1.0549957423213101E11), new Vector3(5058.947582097117,11184.45711782372,-8183.524138259704));
hygiea2 = new NamedBodyForcePair("Hygiea",8.32E19,
new Vector3(-3.983943433707043E11,2.325833000024021E11,-2.233667695713672E10), new Vector3(-6931.864585548552,-15686.8108598699,-690.5791992347208));
ceres2 = new NamedBodyForcePair("Ceres",9.394E20,
new Vector3(3.781372641419032E11,1.96718960466285E11,-6.366459168068592E10), new Vector3(-8555.324226752316,14718.33755980907,2040.230135060142));
NamedBodyForcePair[] pairs = new NamedBodyForcePair[] {sun2, mercury2, venus2, earth2,
moon2, mars2, deimos2, phobos2,
vesta2, pallas2, hygiea2, ceres2};
// check basic functions of 'HierachicalSystem'
System.out.println("Test1:");
CosmicSystem earthSystem = new HierarchicalSystem(earth2, moon2);
CosmicSystem marsSystem = new HierarchicalSystem(mars2, deimos2, phobos2);
CosmicSystem solarSystem = new HierarchicalSystem(sun2, mercury2, venus2, earthSystem,
marsSystem, vesta2, pallas2, hygiea2, ceres2);
testValue(earthSystem.numberOfBodies(), 2);
testValue(solarSystem.numberOfBodies(), 12);
System.out.println("Test2:");
System.out.println(solarSystem.toString());
testValue(solarSystem.toString().contains("Mars"), true);
testValue(solarSystem.toString().contains("Deimos"), true);
testValue(solarSystem.toString().contains("Moon"), true);
testValue(earthSystem.toString().contains("Moon"), true);
testValue(earthSystem.toString().contains("Earth"), true);
System.out.println("Test3:");
testValue(solarSystem.getMass(),1.9890118865556799E30);
System.out.println("Test4:");
BodyLinkedList bl = solarSystem.getBodies();
testValue(bl.size(),12);
HashSet<Body> set = new HashSet<>();
while(bl.size() > 0) {
set.add(bl.pollFirst());
}
testValue(set.size(), 12);
System.out.println("Test5:");
for (int seconds = 0; seconds < 50000; seconds++) {
// for each body (with index i): compute the total force exerted on it.
for (int i = 0; i < bodies.length; i++) {
forceOnBody[i] = new Vector3(0, 0, 0); // begin with zero
for (int j = 0; j < bodies.length; j++) {
if (i != j) {
pairs[i].addForceTo(pairs[j]);
Vector3 forceToAdd = bodies[i].gravitationalForce(bodies[j]);
forceOnBody[i] = forceOnBody[i].plus(forceToAdd);
}
}
}
// now forceOnBody[i] holds the force vector exerted on body with index i.
// for each body (with index i): move it according to the total force exerted on it.
for (int i = 0; i < bodies.length; i++) {
bodies[i].move(forceOnBody[i]);
pairs[i].update();
}
}
for (int i = 0; i < bodies.length; i++) {
testValue(bodies[i].massCenter().distanceTo(pairs[i].getMassCenter()),0);
}
System.out.println("Test6:");
sun2 = new NamedBodyForcePair("Sun",1.989E30, new Vector3(0.0,0.0,0.0)
, new Vector3(0.0,0.0,0.0));
earth2 = new NamedBodyForcePair("Earth",5.972E24,
new Vector3(-6.13135922534815E10,-1.383789852227691E11,2.719682263474911E7), new Vector3(26832.720535473603,-11948.23168764519,1.9948243075997851));
moon2 = new NamedBodyForcePair("Moon",7.349E22,
new Vector3(-6.132484773775896E10,-1.387394951280871E11,1.701046736294776E7), new Vector3(27916.62329282941,-12020.39526008238,-94.89703264508708));
mars2 = new NamedBodyForcePair("Mars",6.41712E23,
new Vector3(-1.7923193702925848E11,1.726665823982123E11,7.991673845249474E9), new Vector3(-15925.78496403673,-15381.16179928219,68.67560910598857));
deimos2 = new NamedBodyForcePair("Deimos",1.8E20,
new Vector3(-1.792255010450533E11,1.726891122683271E11,7.990659337380297E9), new Vector3(-17100.476719804457,-15020.348656808,631.2927851249581));
phobos2 = new NamedBodyForcePair("Phobos",1.08E20,
new Vector3(-1.792253482539647E11,1.72661109673625E11,7.987848354800322E9), new Vector3(-14738.203714241401,-13671.17675223948,-411.0012490555253));
mercury2 = new NamedBodyForcePair("Mercury",3.301E23,
new Vector3(-5.167375560011926E10,-4.217574885682655E10,1.14808913958168E9), new Vector3(21580.25398577148,-34951.03632847389,-4835.225596525241));
venus2 = new NamedBodyForcePair("Venus",4.86747E24,
new Vector3(-3.123150865740532E10,1.0395568504115701E11,3.173401325838074E9), new Vector3(-33748.180519629335,-10014.25141045021,1809.94488874165));
vesta2 = new NamedBodyForcePair("Vesta",2.5908E20,
new Vector3(-3.337493557929893E11,-4.7147908276077385E10,4.1923010146878105E10), new Vector3(4440.54247538484,-19718.49074006637,48.06573124543601));
pallas2 = new NamedBodyForcePair("Pallas",2.14E20,
new Vector3(4.3452066613895575E11,-2.057319365171432E11,1.0549957423213101E11), new Vector3(5058.947582097117,11184.45711782372,-8183.524138259704));
hygiea2 = new NamedBodyForcePair("Hygiea",8.32E19,
new Vector3(-3.983943433707043E11,2.325833000024021E11,-2.233667695713672E10), new Vector3(-6931.864585548552,-15686.8108598699,-690.5791992347208));
ceres2 = new NamedBodyForcePair("Ceres",9.394E20,
new Vector3(3.781372641419032E11,1.96718960466285E11,-6.366459168068592E10), new Vector3(-8555.324226752316,14718.33755980907,2040.230135060142));
pairs = new NamedBodyForcePair[] {sun2, mercury2, venus2, earth2,
moon2, mars2, deimos2, phobos2,
vesta2, pallas2, hygiea2, ceres2};
HierarchicalSystem hs = new HierarchicalSystem(sun2, mercury2, venus2,
new HierarchicalSystem(earth2, moon2), new HierarchicalSystem(mars2, deimos2,
phobos2), vesta2, pallas2, hygiea2, ceres2);
for (int seconds = 0; seconds < 50000; seconds++) {
hs.addForceTo(hs);
hs.update();
}
for (int i = 0; i < bodies.length; i++) {
testValue(bodies[i].massCenter().distanceTo(pairs[i].getMassCenter()),0);
}
*/ //TODO: uncomment
}
public static void testComparison(Object first, Object second, boolean expected) {
boolean real = first == second;
if (real == expected) {
System.out.println("Successful comparison");
} else {
System.out.println("Comparison NOT successful! Expected value: " + expected + " / Given value: " + real);
}
}
public static void testValue(Object given, Object expected) {
if (given == expected) {
System.out.println("Successful test");
} else {
System.out.println("Test NOT successful! Expected value: " + expected + " / Given value: " + given);
}
}
public static void testValue(double given, double expected) {
if (given < expected + (expected + 1) / 1e12 && given > expected - (expected + 1) / 1e12) {
System.out.println("Successful test");
} else {
System.out.println("Test NOT successful! Expected value: " + expected + " / Given value: " + given);
}
}
}

41
src/CosmicSystem.java Normal file
View File

@ -0,0 +1,41 @@
// A representation of a system of bodies with associated forces. Provides methods
// for computing current mutual forces, updating the positions of bodies and drawing
// the bodies in a CodeDraw object.
//
public interface CosmicSystem extends Drawable {
// Returns a readable representation of this system.
String toString();
// Returns the mass center of this system.
Vector3 getMassCenter();
// Returns the overall mass of this system.
double getMass();
// Returns the overall number of bodies contained in this system.
int numberOfBodies();
// Returns the distance between the mass centers of 'this' and the specified system.
//Precondition: cs != null
double distanceTo(CosmicSystem cs);
// Adds the force that the specified body exerts on each of this systems bodies to each of this
// systems bodies.
// Precondition: b != null
void addForceFrom(Body b);
// Adds the force that this system exerts on each of the bodies of 'cs' to the bodies in 'cs'.
// For exact computations this means that for each body of 'this' its force on each body of
// 'cs' is added to this body of 'cs'.
// Precondition: cs != null
void addForceTo(CosmicSystem cs);
// Returns a list with all the bodies of 'this'. The order is not defined.
BodyLinkedList getBodies();
// Moves each of the bodies of 'this' according to the previously accumulated forces and
// resets all forces to zero.
void update();
}

10
src/Drawable.java Normal file
View File

@ -0,0 +1,10 @@
import codedraw.CodeDraw;
// An object that can be drawn in a CodeDraw canvas.
//
public interface Drawable {
//draws the object into the canvas 'cd'
//Precondition: cd != null
void draw(CodeDraw cd);
}

14
src/HierarchicalSystem.java Normal file
View File

@ -0,0 +1,14 @@
// A cosmic system that is composed of a central named body (of type 'NamedBodyForcePair')
// and an arbitrary number of subsystems (of type 'HierarchicalSystem') in its orbit.
// This class implements 'CosmicSystem'.
//
public class HierarchicalSystem /* TODO: add clause */ {
// TODO: define missing parts of this class.
// Initializes this system with a name and a central body.
public HierarchicalSystem(NamedBodyForcePair central, CosmicSystem... inOrbit) {
// TODO: implement constructor.
}
}

21
src/NamedBodyForcePair.java Normal file
View File

@ -0,0 +1,21 @@
// A body with a name and an associated force. The leaf node of
// a hierarchical cosmic system. This class implements 'CosmicSystem'.
//
public class NamedBodyForcePair /* TODO: add clause */ {
// TODO: define missing parts of this class.
// Initializes this with name, mass, current position and movement. The associated force
// is initialized with a zero vector.
public NamedBodyForcePair(String name, double mass, Vector3 massCenter, Vector3 currentMovement) {
// TODO: implement constructor.
}
// Returns the name of the body.
public String getName() {
// TODO: implement method.
return "";
}
}

53
src/Simulation4.java Normal file
View File

@ -0,0 +1,53 @@
import codedraw.CodeDraw;
import java.awt.*;
// Simulates the formation of a massive solar system.
//
public class Simulation4 {
// 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
// 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
NamedBodyForcePair sun = new NamedBodyForcePair("Sun",1.989E30, new Vector3(0.0,0.0,0.0), new Vector3(0.0,0.0,0.0));
NamedBodyForcePair earth = new NamedBodyForcePair("Earth",5.972E24, new Vector3(-6.13135922534815E10,-1.383789852227691E11,2.719682263474911E7), new Vector3(26832.720535473603,-11948.23168764519,1.9948243075997851));
NamedBodyForcePair moon = new NamedBodyForcePair("Moon",7.349E22, new Vector3(-6.132484773775896E10,-1.387394951280871E11,1.701046736294776E7), new Vector3(27916.62329282941,-12020.39526008238,-94.89703264508708));
NamedBodyForcePair mars = new NamedBodyForcePair("Mars",6.41712E23, new Vector3(-1.7923193702925848E11,1.726665823982123E11,7.991673845249474E9), new Vector3(-15925.78496403673,-15381.16179928219,68.67560910598857));
NamedBodyForcePair deimos = new NamedBodyForcePair("Deimos",1.8E20, new Vector3(-1.792255010450533E11,1.726891122683271E11,7.990659337380297E9), new Vector3(-17100.476719804457,-15020.348656808,631.2927851249581));
NamedBodyForcePair phobos = new NamedBodyForcePair("Phobos",1.08E20, new Vector3(-1.792253482539647E11,1.72661109673625E11,7.987848354800322E9), new Vector3(-14738.203714241401,-13671.17675223948,-411.0012490555253));
NamedBodyForcePair mercury = new NamedBodyForcePair("Mercury",3.301E23, new Vector3(-5.167375560011926E10,-4.217574885682655E10,1.14808913958168E9), new Vector3(21580.25398577148,-34951.03632847389,-4835.225596525241));
NamedBodyForcePair venus = new NamedBodyForcePair("Venus",4.86747E24, new Vector3(-3.123150865740532E10,1.0395568504115701E11,3.173401325838074E9), new Vector3(-33748.180519629335,-10014.25141045021,1809.94488874165));
NamedBodyForcePair vesta = new NamedBodyForcePair("Vesta",2.5908E20, new Vector3(-3.337493557929893E11,-4.7147908276077385E10,4.1923010146878105E10), new Vector3(4440.54247538484,-19718.49074006637,48.06573124543601));
NamedBodyForcePair pallas = new NamedBodyForcePair("Pallas",2.14E20, new Vector3(4.3452066613895575E11,-2.057319365171432E11,1.0549957423213101E11), new Vector3(5058.947582097117,11184.45711782372,-8183.524138259704));
NamedBodyForcePair hygiea = new NamedBodyForcePair("Hygiea",8.32E19, new Vector3(-3.983943433707043E11,2.325833000024021E11,-2.233667695713672E10), new Vector3(-6931.864585548552,-15686.8108598699,-690.5791992347208));
NamedBodyForcePair ceres = new NamedBodyForcePair("Ceres",9.394E20, new Vector3(3.781372641419032E11,1.96718960466285E11,-6.366459168068592E10), new Vector3(-8555.324226752316,14718.33755980907,2040.230135060142));
//TODO: implementation of this method according to 'Aufgabenblatt4.md'.
}
}