Added support for negative coordinates

src/de/tud/kom/p2psim/impl/topology/movement/VehicleMovementModel.java

@@ -228,8 +228,8 @@ public class VehicleMovementModel implements MovementModel, EventHandler, Future
 			if (sumoExe != null) {
 				TraciSimulationController simulationController = TraciSimulationController.createSimulationController(sumoExe, sumoConfigFile);
 				_controller = simulationController;
-				_controller.init();
 				_controller.setObservedArea(offsetX, offsetY, offsetX + width, offsetY + height);
+				_controller.init();
 				_controller.nextStep();
 
 				extractor = simulationController;

src/de/tud/kom/p2psim/impl/topology/movement/vehicular/sumo/simulation/controller/traci/TraciSimulationController.java

@@ -335,7 +335,7 @@ public class TraciSimulationController implements VehicleController, SimulationS
 
 		try {
 			SumoBoundingBox netBoundary = (SumoBoundingBox) _connection.do_job_get(netBoundaryCommand);
-			return netBoundary.x_max + netBoundary.x_min;
+			return Math.max(netBoundary.x_max - netBoundary.x_min, 10);
 		} catch (Exception e) {
 			//Nothing to do
 		}
@@ -348,9 +348,7 @@ public class TraciSimulationController implements VehicleController, SimulationS
 
 		try {
 			SumoBoundingBox netBoundary = (SumoBoundingBox) _connection.do_job_get(netBoundaryCommand);
-			System.out.println(netBoundary.y_max);
-			System.out.println(netBoundary.y_min);
-			return netBoundary.y_max + netBoundary.y_min;
+			return Math.max(netBoundary.y_max - netBoundary.y_min, 10);
 		} catch (Exception e) {
 			//Nothing to do
 		}