5 files changed, 38 insertions, 10 deletions
diff --git a/src/jcgp/population/Chromosome.java b/src/jcgp/population/Chromosome.java
index 1f264f2..08ff9b9 100644
--- a/src/jcgp/population/Chromosome.java
+++ b/src/jcgp/population/Chromosome.java
@@ -104,7 +104,7 @@ public class Chromosome {
 				// populate with connections equivalent to clone
 				Connection copyConnection;
 				for (int i = 0; i < connections.length; i++) {
-					copyConnection = clone.getNode(r, c).getConnections(i);
+					copyConnection = clone.getNode(r, c).getConnection(i);
 					if (copyConnection instanceof Input) {
 						connections[i] = inputs[((Input) copyConnection).getIndex()];
 					} else if (copyConnection instanceof Node) {
@@ -251,12 +251,11 @@ public class Chromosome {
 			recomputeActiveNodes = false;
 			activeNodes = new ArrayList<Connection>();
 			
-			for (int r = 0; r < nodes.length; r++) {
-				for (int c = 0; c < nodes[r].length; c++) {
-					
-				}
+			for (Output output : outputs) {
+				output.getActiveNodes(activeNodes);
 			}
-		}		
+			
+		}
 		return activeNodes;
 	}
 
diff --git a/src/jcgp/population/Connection.java b/src/jcgp/population/Connection.java
index 4e69e99..12e92d6 100644
--- a/src/jcgp/population/Connection.java
+++ b/src/jcgp/population/Connection.java
@@ -1,6 +1,11 @@
 package jcgp.population;
 
+import java.util.ArrayList;
+
 public interface Connection {
 
-	public abstract int getValue();
+	public int getValue();
+
+	public void getActive(ArrayList<Connection> activeNodes);
+
 }
diff --git a/src/jcgp/population/Input.java b/src/jcgp/population/Input.java
index ee008ce..f3199b8 100644
--- a/src/jcgp/population/Input.java
+++ b/src/jcgp/population/Input.java
@@ -1,5 +1,7 @@
 package jcgp.population;
 
+import java.util.ArrayList;
+
 public class Input implements Connection {
 	
 	private int value = 0, index;
@@ -21,4 +23,11 @@ public class Input implements Connection {
 		return index;
 	}
 
+	@Override
+	public void getActive(ArrayList<Connection> activeNodes) {
+		if (!activeNodes.contains(this)) {
+			activeNodes.add(this);
+		}
+	}
+
 }
diff --git a/src/jcgp/population/Node.java b/src/jcgp/population/Node.java
index 40ffa52..c09532c 100644
--- a/src/jcgp/population/Node.java
+++ b/src/jcgp/population/Node.java
@@ -1,5 +1,7 @@
 package jcgp.population;
 
+import java.util.ArrayList;
+
 import jcgp.Parameters;
 import jcgp.Utilities;
 import jcgp.function.Function;
@@ -58,7 +60,17 @@ public class Node implements MutableElement, Connection {
 		return function;
 	}
 
-	public Connection getConnections(int index) {
+	public Connection getConnection(int index) {
 		return connections[index];
 	}
+
+	@Override
+	public void getActive(ArrayList<Connection> activeNodes) {
+		if (!activeNodes.contains(this)) {
+			activeNodes.add(this);
+		}
+		for (int i = 0; i < function.getArity(); i++) {
+			connections[i].getActive(activeNodes);
+		}
+	}
 }
diff --git a/src/jcgp/population/Output.java b/src/jcgp/population/Output.java
index 68045b0..b3cb648 100644
--- a/src/jcgp/population/Output.java
+++ b/src/jcgp/population/Output.java
@@ -1,5 +1,7 @@
 package jcgp.population;
 
+import java.util.ArrayList;
+
 
 public class Output implements MutableElement {
 	
@@ -29,7 +31,8 @@ public class Output implements MutableElement {
 	public Connection getSource() {
 		return source;
 	}
-	
-	
 
+	public void getActiveNodes(ArrayList<Connection> activeNodes) {
+		source.getActive(activeNodes);
+	}
 }