Added withGUI flag to the Agent launch file

pps_ws/src/d_fall_pps/launch/Agent.launch

@@ -3,6 +3,9 @@
 	<!-- INPUT ARGUMENT OF THE AGENT's ID -->
 	<arg name="agentID" default="$(optenv DFALL_DEFAULT_AGENT_ID)" />
 
+	<!-- INPUT ARGUMENT FOR LAUNCHING A GUI OR NOT -->
+	<arg name="withGUI" default="true" />
+
 	<!-- Example of how to use the value in agentID -->
     <!-- <param name="param" value="$(arg agentID)"/> -->
 
@@ -132,13 +135,16 @@
 			/>
 		</node>
 
+
 		<!-- AGENT GUI (aka. the "student GUI") -->
-	    <node
-	    	pkg    = "d_fall_pps"
-	    	name   = "student_GUI"
-	    	output = "screen"
-	    	type   = "student_GUI">
-		</node>
+		<group if="$(arg withGUI)">
+			<node
+				pkg    = "d_fall_pps"
+				name   = "student_GUI"
+				output = "screen"
+				type   = "student_GUI">
+			</node>
+		</group>
 		
 	</group>