Hello,
I have to write a class test about our last project in school.
I just copied what the teatcher wrote down in the script, but nobody undersands what effect those
command blocks have. If I would know what they cause, I would maybe be able to change them.
I will mark the command-parts with
Just write what simple effect the entered commands have.
Thank you :)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 | import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)import java.util.Random;import java.util.*;import java.lang.*;--------------------------------------------------/** * Write a description of class MyWorld here. * * @author (your name) * @version (a version number or a date) */public class Medium extends World{ public static final int cellsX = 80; public static final int cellsY = 80; private static final int cellSize = 10; public static final double forceConst = 1.0; public static double attractiveForce = 0.1; public static double forceThreshold = 0.1; public static double temperature = 5; public enum Kind { KATION, ANION, NEUT } Random rand = new Random(); // Initialisierung einer Zufallszahl public static class Vector { public double x,y; public Vector() { this.x = 0.0; this.y = 0.0; } public Vector (double x, double y) { this.x = x; this.y = y; } } public static class Cell { public int x,y; public Particle particle; boolean occupied; public Cell() { this.x = 0; this.y = 0; this.particle = null; this.occupied = false; } public Cell(int x, int y, Particle particle, boolean occupied) { this.x = x; this.y = y; this.particle = particle; this.occupied = occupied; } } public static Cell[][] cell = new Cell[cellsX][cellsY]; public static List<Cell> freeCells = new ArrayList<Cell>(); public static List<Cell> occupiedCells = new ArrayList<Cell>(); public static List<Cell> chargedCells = new ArrayList<Cell>(); public static List<Particle> chargedParticles = new ArrayList<Particle>(); ------------------------------------------------ /** * Constructor for objects of class MyWorld. * */ public Medium() { // Create a new world with cellsX x cellsY cells with a cell size of cellSize x cellSize pixels. super(cellsX, cellsY, cellSize); /* * Initialisierung aller Zellen * und Vorbereiten der Mengen der freien und besetzen Zellen */ freeCells.clear(); // Liste freier Zellen leeren occupiedCells.clear(); // Liste besetzter Zellen leeren chargedCells.clear(); // Liste besetzter geladener Zellen leeren chargedParticles.clear(); // Liste geladener Teilchen leeren for (int x=0; x<cellsX; x++) // Initialisierung aller Zellen des Mediums { for (int y=0; y<cellsY; y++) { cell[x][y] = new Cell(x,y,null,false); // Verwendung des polymorphen Konstruktors freeCells.add(cell[x][y]); // Liste freier Zellen füllen } } } -------------------------------------------------- /** * createParticle - erzeugt ein Particle der Art kind und der Ladung charge * an einer gegebenen Position */ public void createParticle(Kind kind, int charge, int x, int y) { Particle particle; particle=new Particle(kind, charge, x, y); addObject(particle,x,y); cell[x][y].particle = particle; cell[x][y].occupied = true; freeCells.remove(cell[x][y]); occupiedCells.add(cell[x][y]); if (charge!=0) { chargedCells.add(cell[x][y]); chargedParticles.add(particle); } } ----------------------------------------------------- /** * createParticles - erzeugt n Teilchen der Art kind und der Ladung charge an zufälligen Positionen */ public void createParticles(int n, Kind kind, int charge) { int x,y; Cell freeCell; if (freeCells.size()>=n) { for(int i=0; i<n; i++) { freeCell = freeCells.get(rand.nextInt(freeCells.size())); createParticle(kind, charge,freeCell.x,freeCell.y); } } else { System.out.println("Not enough free cells, only "+freeCells.size()+" cells available!"); // exception } } -------------------------------------------- /** * createKations - erzeugt n Teilchen der Art KATION und der Ladung charge=1 an zufälligen Positionen */ public void createKations(int n) { createParticles(n, Kind.KATION, 1); }------------------------------------------------------- /** * createKations - erzeugt n Teilchen der Art KATION und der Ladung charge an zufälligen Positionen */ public void createKations(int n, int charge) { createParticles(n, Kind.KATION, charge); }----------------------------------------------------- /** * createAnions - erzeugt n Teilchen der Art ANION und der Ladung charge=-1 an zufälligen Positionen */ public void createAnions(int n) { createParticles(n, Kind.ANION, -1); }--------------------------------------------------- /** * createAnions - erzeugt n Teilchen der Art ANION und der Ladung charge an zufälligen Positionen */ public void createAnions(int n, int charge) { createParticles(n, Kind.ANION, charge); }------------------------------------------------ /** * createNeuts - erzeugt n Teilchen der Art NEUT und der Ladung charge=0 an zufälligen Positionen */ public void createNeuts(int n) { createParticles(n, Kind.NEUT, 0); }-------------------------------------------------------- /** * createKationsAnions - erzeugt jeweils n Teilchen der Art KATION und ANION und der Ladung +1 und -1 an zufälligen Positionen */ public void createKationsAnions(int n) { createKations(n); createAnions(n); }----------------------------------- /** * createKationsAnions - erzeugt jeweils n Teilchen der Art KATION und ANION und der Ladung +charge und -charge an zufälligen Positionen */ public void createKationsAnions(int n, int charge) { int chargeKation, chargeAnion; chargeKation = charge; chargeAnion = -charge; createKations(n,chargeKation); createAnions(n,chargeAnion); } ------------------------------------------- /** * force - Kraft auf ein Teilchen particle von einem anderen otherParticle */ public static Vector force(Particle particle, Particle otherParticle) { Vector unitVector, force=new Vector(); double distanceSquare, distance, forceValue; if (particle != otherParticle) { distanceSquare = Math.pow(otherParticle.x - particle.x, 2) + Math.pow(otherParticle.y - particle.y, 2); distance = Math.sqrt(distanceSquare); forceValue = (-forceConst*particle.charge*otherParticle.charge + Medium.attractiveForce)/Math.pow(distance,2); unitVector = unitVector((otherParticle.x - particle.x), (otherParticle.y - particle.y)); force = multiplyVector(unitVector, forceValue); } return force; } --------------------------------------- /** * totalForce - Kraft auf ein Teilchen particle von allen anderen Teilchen in der Liste otherParticles */ public static Vector totalForce(Particle particle, List<Particle> otherParticles) { Vector totalForce = new Vector(); Particle otherParticle; for (int i=0; i<otherParticles.size();i++) { otherParticle = otherParticles.get(i); totalForce.x += force(particle,otherParticle).x; totalForce.y += force(particle,otherParticle).y; } return totalForce; } ------------------------------------------- /** * unitVector - erzeugt einen Einheitsvektor in Richtung der Koordinaten x,y */ public static Vector unitVector(double x, double y) { double length; length = Math.sqrt(x*x + y*y); return new Vector(x/length,y/length); } ---------------------------------------------- /** * multiplyVector - multipliziert Vector vector mit dem Skalar scalar */ public static Vector multiplyVector(Vector vector, double scalar) { vector.x *= scalar; vector.y *= scalar; return vector; } ---------------------------------------------- /** * Setze temperatur Wert */ public void setTemperature(double temperature) { this.temperature = temperature; } ------------------------------------------------------- /** * Setze forceThreshold Wert */ public void setForceThreshold(double forceThreshold) { this.forceThreshold = forceThreshold; }----------------------------------------- /** * Setze attractiveForce Wert */ public void setAttractiveForce(double attractiveForce) { this.attractiveForce = attractiveForce; }---------------------------------------------------} |
