From 24e228d7f5a7707931f8e73fa951325642985c89 Mon Sep 17 00:00:00 2001
From: Andrew Lawson <andrewlawson@Andrews-MacBook-Air-2.local>
Date: Mon, 1 Dec 2014 13:25:06 -0500
Subject: [PATCH] Fixed input being changed globally when modified in
 samplePoints().

---
 geometric_separators.pde | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/geometric_separators.pde b/geometric_separators.pde
index df2b97a..add7705 100644
--- a/geometric_separators.pde
+++ b/geometric_separators.pde
@@ -137,15 +137,16 @@ PVector getGeometricMedian(ArrayList<PVector> input) {
 
 // Sample input points into sets of 4
 ArrayList<ArrayList<PVector>> samplePoints(ArrayList<PVector> input) {
+    ArrayList<PVector> inputCopy = new ArrayList<PVector>(input);
 	ArrayList<ArrayList<PVector>> setList = new ArrayList<ArrayList<PVector>>();
 	ArrayList<PVector> pointList = new ArrayList<PVector>();
 	// While there are still points, split into sets
-	while (input.size() > 0) {
+	while (inputCopy.size() > 0) {
 		double rnd = new Random().nextDouble();
-		int index = (int)(rnd * 10) % input.size();
+		int index = (int)(rnd * 10) % inputCopy.size();
 		// Add to set
-		pointList.add(input.get(index));
-		input.remove(index);
+		pointList.add(inputCopy.get(index));
+		inputCopy.remove(index);
 		// Create new set on max size
 		if (pointList.size() == 4) {
 			setList.add(pointList);