add tread rendering to tikzGenerator.

The stairs consist of multiple paths. Each tread is one path. The black
'line' is not a path but an empty space filled by a black background
behind the stairs.

VadereGui/src/org/vadere/gui/components/view/DefaultRenderer.java

@@ -134,12 +134,7 @@ public abstract class DefaultRenderer {
 		}
 	}
 
-	protected void renderStair(ScenarioElement element, final Graphics2D graphics, Color color){
-		Stairs stairs = (Stairs) element;
-
-		final Color tmpColor = graphics.getColor();
-		graphics.setColor(Color.black);
-		graphics.fill(stairs.getShape());
+	public static Area getStairShapeWithThreads(Stairs stairs){
 		Area hatchArea = new Area(stairs.getShape());
 		double stroke = stairs.getTreadDepth() * 0.05;
 		double halfTreadDepth = stairs.getTreadDepth()/2;
@@ -159,9 +154,19 @@ public abstract class DefaultRenderer {
 			p.closePath();
 
 			p.transform(AffineTransform.getTranslateInstance(trans.x, trans.y));
-
 			hatchArea.subtract(new Area(p));
 		}
+		return hatchArea;
+	}
+
+	protected void renderStair(ScenarioElement element, final Graphics2D graphics, Color color){
+		Stairs stairs = (Stairs) element;
+
+		final Color tmpColor = graphics.getColor();
+		graphics.setColor(Color.black);
+		graphics.fill(stairs.getShape());
+
+		Area hatchArea = getStairShapeWithThreads(stairs);
 
 		graphics.setColor(color);
 		graphics.fill(hatchArea);

VadereGui/src/org/vadere/gui/postvisualization/utils/TikzGenerator.java

@@ -5,6 +5,7 @@ import org.apache.log4j.Logger;
 import org.jetbrains.annotations.NotNull;
 import org.vadere.gui.components.model.DefaultSimulationConfig;
 import org.vadere.gui.components.model.SimulationModel;
+import org.vadere.gui.components.view.DefaultRenderer;
 import org.vadere.gui.components.view.SimulationRenderer;
 import org.vadere.gui.postvisualization.model.PostvisualizationModel;
 import org.vadere.simulator.projects.dataprocessing.processor.PedestrianOSMStrideLengthProcessor;
@@ -175,7 +176,8 @@ public class TikzGenerator {
 		if (config.isShowStairs()) {
 			generatedCode += "% Stairs\n";
 			for (Stairs stair : topography.getStairs()) {
-				generatedCode += String.format("\\fill[StairColor] %s;\n", generatePathForScenarioElement(stair));
+				generatedCode += String.format("\\fill[black] %s;\n", generatePathForScenarioElement(stair));
+				generatedCode += String.format("\\fill[StairColor] %s;\n", generatePathForStairs(stair));
 			}
 		} else {
 			generatedCode += "% Stairs (not enabled in config)\n";
@@ -302,6 +304,24 @@ public class TikzGenerator {
 		return generatedPath.trim();
 	}
 
+	private String generatePathForStairs(Stairs element) {
+		String generatedPath = "";
+
+		AffineTransform noTransformation = new AffineTransform();
+		Shape shape = DefaultRenderer.getStairShapeWithThreads(element);
+		PathIterator pathIterator = shape.getPathIterator(noTransformation);
+
+		while (!pathIterator.isDone()) {
+			float[] coords = new float[6];
+			int type = pathIterator.currentSegment(coords);
+
+			generatedPath += convertJavaToTikzPath(type, coords);
+			pathIterator.next();
+		}
+
+		return generatedPath.trim();
+	}
+
     private String generatePathForShape(Shape shape) {
         String generatedPath = "";