Added a check if pedestrians that are generated are overlapping with obstacles.

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

@@ -117,8 +117,9 @@ public class SingleSourceController extends SourceController {
 			VPoint randomPoint = new VPoint(rec.getMinX() + random.nextDouble() * rec.getWidth(), rec.getMinY() + random.nextDouble() * rec.getHeight());
 			VShape freeSpaceRequired = dynamicElementFactory.getDynamicElementRequiredPlace(randomPoint);
 
-			// no intersection with other free spaces.
-			if(blockPedestrianShapes.stream().noneMatch(shape -> shape.intersects(freeSpaceRequired))) {
+			// no intersection with other free spaces (obstacles & other pedestrians)
+			if(blockPedestrianShapes.stream().noneMatch(shape -> shape.intersects(freeSpaceRequired))
+					&& 	this.getTopography().getObstacles().stream().noneMatch(obs -> obs.getShape().intersects(freeSpaceRequired))) {
 				return Optional.of(randomPoint);
 			}
 		}

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

@@ -26,10 +26,11 @@ import java.util.Random;
 public abstract class SourceController {
 
 	protected final double NO_EVENT = Double.MAX_VALUE;
-	public static final double SPAWN_BUFFER_SIZE = 0.01;
+	public static final double SPAWN_BUFFER_SIZE = 0.03;
 
 	protected final Source source;
 	private final DynamicElementFactory dynamicElementFactory;
+
 	private final Topography topography;
 	protected final Random random;
 
@@ -111,6 +112,10 @@ public abstract class SourceController {
 
 	abstract protected void determineNumberOfSpawnsAndNextEvent(double simTimeInSec);
 
+	protected Topography getTopography() {
+		return topography;
+	}
+
 	protected void createNextEvent() {
 		if (isSourceWithOneSingleSpawnEvent()) {
 			timeOfNextEvent = NO_EVENT;