Method readMap

movement/MapBasedMovement.java:265–310

Reads a sim map from location set to the settings, mirrors the map and moves its upper left corner to origo. @return A new SimMap based on the settings

()

	 * @return A new SimMap based on the settings
	 */
	private SimMap readMap() {
		SimMap simMap;
		Settings settings = new Settings(MAP_BASE_MOVEMENT_NS);
		WKTMapReader r = new WKTMapReader(true);
		
		if (cachedMap == null) {
			cachedMapFiles = new ArrayList<String>(); // no cache present
		}
		else { // something in cache
			// check out if previously asked map was asked again
			SimMap cached = checkCache(settings);
			if (cached != null) {
				nrofMapFilesRead = cachedMapFiles.size();
				return cached; // we had right map cached -> return it
			}
			else { // no hit -> reset cache
				cachedMapFiles = new ArrayList<String>();
				cachedMap = null;
			}
		}

		try {
			int nrofMapFiles = settings.getInt(NROF_FILES_S);

			for (int i = 1; i <= nrofMapFiles; i++ ) {
				String pathFile = settings.getSetting(FILE_S + i);
				cachedMapFiles.add(pathFile);
				r.addPaths(new File(pathFile), i);
			}
			
			nrofMapFilesRead = nrofMapFiles;
		} catch (IOException e) {
			throw new SimError(e.toString(),e);
		}

		simMap = r.getMap();
		checkMapConnectedness(simMap.getNodes());
		// mirrors the map (y' = -y) and moves its upper left corner to origo
		simMap.mirror();
		Coord offset = simMap.getMinBound().clone();		
		simMap.translate(-offset.getX(), -offset.getY());
		checkCoordValidity(simMap.getNodes());
		
		cachedMap = simMap;
		return simMap;
	}
	
	/**
	 * Checks that all map nodes can be reached from all other map nodes