public FuzzyCMeansResults calculate() throws FileNotFoundException, UnsupportedEncodingException {
membershipMatrix = new MembershipMatrix(numberOfPoints, numberOfClusters);
List<Centroid> newCentroids = calculateNewCentroids();
List<Centroid> oldCentroids;
double exponent = 2.0 / (fuzziness - 1.0);
clock.clockStart();
for (int loop = 0; ; loop++) {
prevMembershipMatrix = membershipMatrix;
oldCentroids = newCentroids;
setInfo("[Fuzzy_C_Means] Loop " + loop);
for (int p = 0; p < numberOfPoints; p++) {
setInfo("[Fuzzy_C_Means] Loop " + loop + " | point " + p);
for (int c = 0; c < numberOfClusters; c++) {
setInfo("[Fuzzy_C_Means] Loop " + loop + " | point " + p + " | cluster " + c);
double TEMP_denominator = 0;
double point_cluster_dist = euclideanDistance(points.get(p), newCentroids.get(c));
double TEMP_nominator = Math.pow((1.0 / point_cluster_dist), exponent);
for (int r = 0; r < numberOfClusters; r++) {
double summary_point_cluster_dist =
euclideanDistance(points.get(p), newCentroids.get(r));
double ratio = Math.pow(point_cluster_dist / summary_point_cluster_dist, exponent);
TEMP_denominator += Math.pow((1.0 / summary_point_cluster_dist), exponent);
}
membershipMatrix.set(p, c, TEMP_nominator / TEMP_denominator);
}
}
newCentroids = calculateNewCentroids();
if (matrixDifferencesSmallerThanEpsilon()) {
break;
}
}
double time = clock.clockEnd();
System.out.println(newCentroids);
setInfo(
"Skin segmented. Fuzz: "
+ fuzziness
+ " Eps: "
+ epsilon
+ " Pix: "
+ numberOfPoints
+ " Time: "
+ time);
return new FuzzyCMeansResults(newCentroids, membershipMatrix);
}
private double distanceTo(Actor opponent) {
double actorToMoveX = opponent.getAvatar().getTranslateX();
double actorToMoveY = opponent.getAvatar().getTranslateY();
double currentX = getAvatar().getTranslateX();
double currentY = getAvatar().getTranslateY();
double deltaX = actorToMoveX - currentX;
double deltaY = actorToMoveY - currentY;
double calculatedDistance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
return calculatedDistance;
}
private Centroid calculateCentroidOfIndex(int index) {
double[] values = new double[pointsDimensions];
double nominator, denominator;
for (int dim = 0; dim < pointsDimensions; dim++) {
nominator = 0;
denominator = 0;
for (int i = 0; i < numberOfPoints; i++) {
nominator +=
Math.pow(membershipMatrix.get(i, index), fuzziness) * points.get(i).getDim(dim);
denominator += Math.pow(membershipMatrix.get(i, index), fuzziness);
}
values[dim] = nominator / denominator;
}
return new Centroid(values);
}
private double euclideanDistance(Features point, Centroid centroid) {
if (point.getNumberOfDim() != centroid.getNumberOfDim()) throw new IllegalArgumentException();
double sumOfSquares = 0;
for (int i = 0; i < point.getNumberOfDim(); i++) {
sumOfSquares +=
(point.getDim(i) - centroid.getDim(i)) * (point.getDim(i) - centroid.getDim(i));
}
return Math.sqrt(sumOfSquares);
}
/**
* processes a single round of combat between two Actor objects: the <b>attacker</b> is this
* object; the <b>defender</b> is received as an argument. This method is called by the
* <b>attacker</b> <i>Actor</i> object. This <b>attacker</b> <i>Actor</i> object chooses another
* <i>Actor</i> object as the <b>defender</b> by sending a reference-to the second <i>Actor</i>
* object. When program execution arrives in <i>combatRound</i>, the method will have access to 2
* sets of <i>Actor</i> attributes (a.k.a. instance fields). In particular, this method will need
* to use <i>health</i> and <i>strength</i> to process a single round of combat. As an outcome of
* the single round, both <i>Actor</i> objects: the <b>attacker</b> and the <b>defender</b> are
* likely to loose some <i>health</i> value, but the <i>Actor</i> object with less <i>strength</i>
* will likely incur more damage to their <i>health</i>. You access the <b>attacker</b> instance
* fields (such as <i>health</i> using <i>this.health</i> and the <b>defender</b> instance fields
* using <i>defender.health</i>. Of course, <i>defender</i> is the name of the stack-oriented
* reference-to variable that is sent to the method.
*
* @param defender a reference to a different <i>Actor</i> object that will engage in combat with
* this <i>Actor</i> object.
* @return <i>health</i> of the <i>Actor</i> following the combat round.
*/
public double combatRound(Actor defender) {
final double MAX_COMBAT_HEALTH_REDUCTION_OF_LOOSER =
10.0; // health ranges 0.0 to 100.0, thus could loose 0.0 to 10.0
final double MAX_COMBAT_HEALTH_REDUCTION_OF_WINNER = 3.0; // could loose 0.0 to 3.0
double healthAdjustmentOfLooser =
-(Math.random() * MAX_COMBAT_HEALTH_REDUCTION_OF_LOOSER)
- 1.0; // looser looses at least 1.0
double healthAdjustmentOfWinner =
-(Math.random() * MAX_COMBAT_HEALTH_REDUCTION_OF_WINNER) + 1.0; // winner gains at least 1.0
double proportionHitPoints =
getHitPoints() / (getHitPoints() + defender.getHitPoints()); // between 0.0 and 1.0
if (Math.random() > proportionHitPoints) {
adjustHealth(healthAdjustmentOfLooser);
defender.adjustHealth(healthAdjustmentOfWinner);
} else {
defender.adjustHealth(healthAdjustmentOfLooser);
adjustHealth(healthAdjustmentOfWinner);
}
return getHealth();
} // end combatRound()
private boolean matrixDifferencesSmallerThanEpsilon() {
boolean areAllSmallerThanEpsilon = true;
for (int p = 0; p < numberOfPoints; p++) {
for (int c = 0; c < numberOfClusters; c++) {
double prev = prevMembershipMatrix.get(p, c);
double curr = membershipMatrix.get(p, c);
if (Math.abs(curr - prev) > epsilon) {
areAllSmallerThanEpsilon = false;
break;
}
}
}
return areAllSmallerThanEpsilon;
}
// Creates a countdown from time to 0
public Countdown(final int time) {
timeLeft = new ReadOnlyIntegerWrapper(time);
timeLeftDouble = new ReadOnlyDoubleWrapper(time);
// Does the counting to 0
timeline =
new Timeline(
// start frame
new KeyFrame(Duration.ZERO, new KeyValue(timeLeftDouble, time)),
// end frame
new KeyFrame(Duration.seconds(time), new KeyValue(timeLeftDouble, 0)));
timeLeftDouble.addListener(
o -> {
timeLeft.set((int) Math.ceil(timeLeftDouble.get()));
});
}
public double getHitPoints() {
return getStrength() + getHealth() * .5 * Math.random();
}
/**
* <i>Actor</i> regain health on each cycle of the simulation (and loose health in battles handled
* by other code).
*/
public void gameCycleHealthGain() {
final double MAX_CYCLE_HEALTH_GAIN = 2.0;
adjustHealth(Math.random() * MAX_CYCLE_HEALTH_GAIN);
}
