implemented route detection

src/main/java/de/srsoftware/web4rail/Plan.java

@@ -92,24 +92,22 @@ public class Plan {
 	private String analyze() {
 		Vector<Route> routes = new Vector<Route>();
 		for (Block block : blocks) {
-			LOG.debug("searching routes from {}",block);
-			for (Connector con : block.startPoints()) {
-				routes.addAll(follow(new Route().start(block),con));
-			}
+			for (Connector con : block.startPoints()) routes.addAll(follow(new Route().start(block),con));
 		}
+		for (Route r : routes) LOG.debug("found route: {}",r);
 		return "analyze() not implemented, yet!";
 	}
 	
-	private Collection<Route> follow(Route route, Connector con) {
-		LOG.debug("follow({}, {})",route,con);
+	private Collection<Route> follow(Route route, Connector con) {		
 		Tile tile = get(con.x(),con.y());
-		Vector<Route> result = new Vector<>();
-		if (tile == null) return result;
-		route.add(tile);
+		Vector<Route> results = new Vector<>();
+		if (tile == null) return results;
+		Tile added = route.add(tile instanceof Shadow ? ((Shadow)tile).overlay() : tile);
+		if (added instanceof Block) return List.of(route);
 		List<Connector> connectors = tile.connections(con.from());
 		List<Route>routes = route.multiply(connectors.size());
-		for (int i=0; i<connectors.size(); i++) result.addAll(follow(routes.get(i),connectors.get(i)));
-		return routes;
+		for (int i=0; i<connectors.size(); i++) results.addAll(follow(routes.get(i),connectors.get(i)));
+		return results;
 	}
 
 	public Tile get(int x, int y) {

src/main/java/de/srsoftware/web4rail/Route.java

@@ -10,8 +10,9 @@ public class Route {
 	
 	private Vector<Tile> path; 
 
-	public void add(Tile tile) {
+	public Tile add(Tile tile) {
 		path.add(tile);
+		return tile;
 	}
 	
 	protected Route clone() {

src/main/java/de/srsoftware/web4rail/tiles/Cross.java

@@ -0,0 +1,9 @@
+package de.srsoftware.web4rail.tiles;
+
+import java.util.List;
+
+import de.srsoftware.web4rail.Connector;
+
+public abstract class Cross extends Tile {
+	public abstract List<Connector> offsetConnections(String from);
+}

src/main/java/de/srsoftware/web4rail/tiles/CrossH.java

@@ -1,17 +1,43 @@
 package de.srsoftware.web4rail.tiles;
 
 import java.io.IOException;
+import java.util.List;
 import java.util.Map;
+import java.util.Vector;
 
 import de.srsoftware.tools.Tag;
+import de.srsoftware.web4rail.Connector;
+import de.srsoftware.web4rail.Plan;
 
-public class CrossH extends Tile{
+public class CrossH extends Cross{
+	
+	@Override
+	public List<Connector> connections(String from) {
+		switch (from) {
+			case Plan.NORTH:
+				return List.of(new Connector(x+1,y+1,Plan.NORTH));
+			case Plan.SOUTH:
+				return List.of(new Connector(x+1,y-1,Plan.SOUTH));
+		}
+		return new Vector<>();
+	}
 	
 	@Override
 	public int len() {
 		return 2;
 	}
 	
+	@Override
+	public List<Connector> offsetConnections(String from) {
+		switch (from) {
+		case Plan.NORTH:
+			return List.of(new Connector(x,y+1,Plan.NORTH));
+		case Plan.SOUTH:
+			return List.of(new Connector(x,y-1,Plan.SOUTH));
+	}
+	return new Vector<>();
+}
+	
 	@Override
 	public Tag tag(Map<String,Object> replacements) throws IOException {
 		return super.tag(replacements).size(200,100).attr("viewbox", "0 0 200 100");

src/main/java/de/srsoftware/web4rail/tiles/CrossV.java

@@ -1,17 +1,24 @@
 package de.srsoftware.web4rail.tiles;
 
 import java.io.IOException;
+import java.util.List;
 import java.util.Map;
 
 import de.srsoftware.tools.Tag;
+import de.srsoftware.web4rail.Connector;
 
-public class CrossV extends Tile{
+public class CrossV extends Cross{
 	
 	@Override
 	public int height() {
 		return 2;
 	}
 	
+	@Override
+	public List<Connector> offsetConnections(String from) {
+		return null;
+	}
+	
 	@Override
 	public Tag tag(Map<String,Object> replacements) throws IOException {
 		return super.tag(replacements).size(100,200).attr("viewbox", "0 0 100 200");

src/main/java/de/srsoftware/web4rail/tiles/DiagNE.java

@@ -1,5 +1,21 @@
 package de.srsoftware.web4rail.tiles;
 
+import java.util.List;
+import java.util.Vector;
+
+import de.srsoftware.web4rail.Connector;
+import de.srsoftware.web4rail.Plan;
+
 public class DiagNE extends Tile{
 	
+	@Override
+	public List<Connector> connections(String from) {
+		switch (from) {
+			case Plan.NORTH:
+				return List.of(new Connector(x+1,y,Plan.WEST));
+			case Plan.EAST:
+				return List.of(new Connector(x,y-1,Plan.SOUTH));
+		}
+		return new Vector<>();
+	}
 }

src/main/java/de/srsoftware/web4rail/tiles/DiagSW.java

@@ -1,5 +1,20 @@
 package de.srsoftware.web4rail.tiles;
 
+import java.util.List;
+import java.util.Vector;
+
+import de.srsoftware.web4rail.Connector;
+import de.srsoftware.web4rail.Plan;
+
 public class DiagSW extends Tile{
-	
+	@Override
+	public List<Connector> connections(String from) {
+		switch (from) {
+			case Plan.SOUTH:
+				return List.of(new Connector(x-1,y,Plan.EAST));
+			case Plan.WEST:
+				return List.of(new Connector(x,y+1,Plan.NORTH));
+		}
+		return new Vector<>();
+	}
 }

src/main/java/de/srsoftware/web4rail/tiles/Shadow.java

@@ -1,8 +1,19 @@
 package de.srsoftware.web4rail.tiles;
 
+import java.util.List;
+
+import de.srsoftware.web4rail.Connector;
+
 public class Shadow extends Tile{
 
 	private Tile overlay;
+	
+	@Override
+	public List<Connector> connections(String from) {
+		if (overlay instanceof StretchableTile) return overlay.connections(from);
+		if (overlay instanceof Cross) return ((Cross)overlay).offsetConnections(from);
+		return super.connections(from);
+	}
 
 	public Shadow(Tile overlay) {
 		this.overlay = overlay;

src/main/java/de/srsoftware/web4rail/tiles/StraightV.java

@@ -1,7 +1,24 @@
 package de.srsoftware.web4rail.tiles;
 
+import java.util.List;
+import java.util.Vector;
+
+import de.srsoftware.web4rail.Connector;
+import de.srsoftware.web4rail.Plan;
+
 public class StraightV extends StretchableTile{
 	
+	@Override
+	public List<Connector> connections(String from) {
+		switch (from) {
+			case Plan.NORTH:
+				return List.of(new Connector(x,y+height(),from));
+			case Plan.SOUTH:
+				return List.of(new Connector(x,y-1,from));
+		}
+		return new Vector<>();
+	}
+	
 	@Override
 	public int height() {
 		return length;

src/main/java/de/srsoftware/web4rail/tiles/TurnoutNW.java

@@ -1,6 +1,22 @@
 package de.srsoftware.web4rail.tiles;
 
-public class TurnoutNW extends Turnout{
+import java.util.List;
+import java.util.Vector;
+
+import de.srsoftware.web4rail.Connector;
+import de.srsoftware.web4rail.Plan;
 
+public class TurnoutNW extends Turnout{
 
+	@Override
+	public List<Connector> connections(String from) {
+		switch (from) {
+			case Plan.NORTH:
+				return List.of(new Connector(x-1,y,Plan.EAST),new Connector(x, y+1, Plan.NORTH));
+			case Plan.WEST:
+			case Plan.SOUTH:
+				return List.of(new Connector(x,y-1,Plan.SOUTH));
+		}
+		return new Vector<>();
+	}
 }