--- a/src/ai/api/ai_station.cpp	Wed Jul 18 08:38:50 2007 +0000
+++ b/src/ai/api/ai_station.cpp	Wed Jul 18 09:20:50 2007 +0000
@@ -4,8 +4,10 @@
 
 #include "ai_station.hpp"
 #include "ai_cargo.hpp"
+#include "../../debug.h"
 #include "../../station.h"
 #include "../../station_map.h"
+#include "../../variables.h"
 
 /* static */ bool AIStation::IsValidStation(StationID station_id)
 {
@@ -40,3 +42,20 @@
 
 	return ::GetStation(station_id)->goods[cargo_id].rating * 101 >> 8;
 }
+
+/* static */ int32 AIStation::GetCoverageRadius(AIStation::StationType type)
+{
+	if (type == STATION_AIRPORT) {
+		DEBUG(ai, 0, "GetCoverageRadius(): coverage radius of airports needs to be requested via AIAirport::GetAirportCoverageRadius(), as it requires AirportType");
+		return 0;
+	}
+	if (!_patches.modified_catchment) return 3;
+
+	switch (type) {
+		case STATION_TRAIN:      return CA_TRAIN;
+		case STATION_TRUCK_STOP: return CA_TRUCK;
+		case STATION_BUS_STOP:   return CA_BUS;
+		case STATION_DOCK:       return CA_DOCK;
+		default:                 return CA_NONE;
+	}
+}