Fixed some bugs.

geometric_separators.pde

@@ -120,6 +120,7 @@ void mousePressed() {
 
 // Get geometric median
 PVector getGeometricMedian(ArrayList<PVector> input) {
+	System.out.println("Geometric median...");
 	if (input.size() == 0) {
 		return null;
 	}
@@ -135,24 +136,25 @@ PVector getGeometricMedian(ArrayList<PVector> input) {
 }
 
 // Sample input points into sets of 4
-ArrayList<Set<PVector>> samplePoints(ArrayList<PVector> input) {
-	ArrayList<Set> setList = new ArrayList<Set<PVector>>();
-	Set<PVector> pointSet = new Set<PVector>();
+ArrayList<HashSet<PVector>> samplePoints(ArrayList<PVector> input) {
+	ArrayList<HashSet<PVector>> setList = new ArrayList<HashSet<PVector>>();
+	HashSet<PVector> pointSet = new HashSet<PVector>();
 	// While there are still points, split into sets
-	while (input.size() > 0) {
-		int rnd = new Random().nextInt();
-		int index = (rnd * (input.size()));
+	while (input.size() > 1) {
+		System.out.println("Sampling...");
+		double rnd = new Random().nextDouble();
+		int index = (int)(rnd * 10) % input.size();
 		// Add to set
 		pointSet.add(input.get(index));
 		// Create new set on max size
 		if (pointSet.size() == 4) {
 			setList.add(pointSet);
-			pointSet = new Set<PVector>();
+			pointSet = new HashSet<PVector>();
 		}
 	}
 	// Add most recent unempty set to list
 	if (pointSet.size() > 0) {
-		setList.add(pointSet)
+		setList.add(pointSet);
 	}
 	return setList;
 }
@@ -161,23 +163,22 @@ ArrayList<Set<PVector>> samplePoints(ArrayList<PVector> input) {
 PVector approxCenterpoint(ArrayList<PVector> input) {
 	if (input.size() == 0) {
 		System.out.println("You don't have any input points!");
+		return null;
 	}
 	else {
 		// Algorithm
 		// Repeat 1 - 3 until one point remains and return that point
-		while (input.size > 1) {
+		while (input.size() > 1) {
 			// 1. Sample points into groups of 4
-			ArrayList<Set<PVector>> setList = samplePoints(input);
+			ArrayList<HashSet<PVector>> setList = samplePoints(input);
 			// 2. Compute radon point of each group (geometric median)
 			ArrayList<PVector> radonList = new ArrayList<PVector>();
-			for (Set<PVector> set : setList) {
+			for (HashSet<PVector> set : setList) {
 				PVector radonPoint = getGeometricMedian(input);
-				else {
-					radonList.add(radonPoint);
-				}
+				radonList.add(radonPoint);
 				// 3. Set input to be new radon points
-				input = radonList;
 			}
+			input = radonList;
 		}
 		return input.get(0);
 	}