bug fix and test update.

VadereGui/tests/org/vadere/gui/postvisualization/TestTrajectory.java

@@ -29,7 +29,7 @@ public class TestTrajectory extends TestCase {
 	@Override
 	protected void setUp() throws Exception {
 		pedestriansByStep = new HashMap<>();
-		List<Step> steps = Arrays.asList(new Step(2), new Step(4), new Step(5), new Step(7));
+		List<Step> steps = Arrays.asList(new Step(1), new Step(4), new Step(5), new Step(7));
 		List<Pedestrian> pedestrians = Arrays.asList(
 				new Pedestrian(new AttributesAgent(1), new Random()),
 				new Pedestrian(new AttributesAgent(2), new Random()),
@@ -47,7 +47,7 @@ public class TestTrajectory extends TestCase {
 
 	@Test
 	public void testGetPedestrian() {
-		Trajectory trajectory = new Trajectory(pedestriansByStep, 1);
+		Trajectory trajectory = new Trajectory(pedestriansByStep, 1, 0.4);
 		assertEquals(trajectory.getAgent(new Step(3)), (trajectory.getAgent(new Step(2))));
 		assertTrue(trajectory.getAgent(new Step(3)).isPresent());
 		assertEquals(trajectory.getAgent(new Step(6)), (trajectory.getAgent(new Step(5))));
@@ -66,8 +66,9 @@ public class TestTrajectory extends TestCase {
 
 	@Test
 	public void testGetPositionReverse() {
-		Trajectory trajectory = new Trajectory(pedestriansByStep, 2);
-		IntStream.rangeClosed(1, 17).forEach(stepNumber -> assertTrue(
+		Trajectory trajectory = new Trajectory(pedestriansByStep, 2, 0.4);
+		trajectory.fill();
+		IntStream.rangeClosed(1, 7).forEach(stepNumber -> assertTrue(
 				trajectory.getPositionsReverse(new Step(stepNumber)).count() + "!=" + stepNumber,
 				trajectory.getPositionsReverse(new Step(stepNumber)).count() == stepNumber));
 		List<VPoint> reversePositions = trajectory.getPositionsReverse(new Step(12)).collect(Collectors.toList());

VadereSimulator/src/org/vadere/simulator/control/OfflineSimulation.java

@@ -38,7 +38,7 @@ public class OfflineSimulation {
 				.flatMap(entry -> entry.getValue().stream())
 				.map(ped -> ped.getId())
 				.distinct()
-				.map(id -> new Trajectory(pedestriansByStep, id))
+				.map(id -> new Trajectory(pedestriansByStep, id, vadere.getAttributesSimulation().getSimTimeStepLength()))
 				.collect(Collectors.toMap(t -> t.getPedestrianId(), t -> t));
 
 		topographyController.prepareTopography();

VadereState/src/org/vadere/state/simulation/Step.java

@@ -58,11 +58,7 @@ public class Step implements Comparable<Step> {
 	 * @return the decremented step or this step (if this step is the minimal step).
 	 */
 	public Step decrement() {
-		if(stepNumber > MINIMAL_STEP) {
-			return new Step(stepNumber - 1);
-		} else {
-			return this;
-		}
+		return new Step(stepNumber - 1);
 	}
 
 	public boolean isGreaterThan(final Step step) {

VadereState/src/org/vadere/state/simulation/Trajectory.java

@@ -55,11 +55,13 @@ public class Trajectory {
 	 * since the complete {@link Map} <tt>pedestrianByStep</tt> has to be iterated for each
 	 * pedestrian. A better way is to construct all {@link Trajectory} objects at once.
 	 *
-	 * @param pedestrianByStep  container for a set of trajectories
-	 * @param pedestrianId      a specific and unique pedestrian id
+	 * @param pedestrianByStep      container for a set of trajectories
+	 * @param pedestrianId          a specific and unique pedestrian id
+	 * @param simStepLengthInSec    step length of one time step in seconds
 	 */
-	public Trajectory(final Map<Step, List<Agent>> pedestrianByStep, final int pedestrianId) {
+	public Trajectory(final Map<Step, List<Agent>> pedestrianByStep, final int pedestrianId, final double simStepLengthInSec) {
 		this.pedestrianId = pedestrianId;
+		this.simStepLengthInSec = simStepLengthInSec;
 
 		// create for each step that contains an pedestrian with the specific pedestrianId
 		this.trajectoryPoints = pedestrianByStep.entrySet().stream()