implemented route detection

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");