implemented route detection

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;
 
+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<>();
+	}
 }