Subversion Repositories mkgmap

/*
 * Copyright (C) 2006 Steve Ratcliffe
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *
 * Author: Steve Ratcliffe
 * Create date: 18-Dec-2006
 */
package uk.me.parabola.mkgmap.general;

import java.util.List;

import uk.me.parabola.imgfmt.app.Area;
import uk.me.parabola.imgfmt.app.Coord;
import uk.me.parabola.log.Logger;

/**
 * Represent a line on a Garmin map.  Lines are a list of points.  They have
 * a type (major highway, stream etc) and a name.  And that is just about it.
 *
 * @author Steve Ratcliffe
 */
public class MapLine extends MapElement {
        private static final Logger log = Logger.getLogger(MapLine.class);

        private List<Coord> points;
        private boolean direction; // set if direction is important.
        private int minLat = Integer.MAX_VALUE;
        private int minLong = Integer.MAX_VALUE;
        private int maxLat = Integer.MIN_VALUE;
        private int maxLong = Integer.MIN_VALUE;

        public MapLine() {
        }

        public MapLine(MapLine orig) {
                super(orig);
                direction = orig.direction;
                //roadDef = orig.roadDef;
        }

        public MapLine copy() {
                return new MapLine(this);
        }

        public List<Coord> getPoints() {
                return points;
        }

        public void setPoints(List<Coord> points) {
                if (this.points != null)
                        log.warn("overwriting points");
                assert points != null : "trying to set null points";
                assert !points.isEmpty() : "trying to set points with zero length";

                this.points = points;
                testForConsecutivePoints(points);
        }
       
        public void testForConsecutivePoints(List<Coord> points) {
                Coord last = null;
                for (Coord co : points) {
                        if (last != null && last.equals(co))
                                log.info("Line " + getName() + " has consecutive identical points at " + co.toDegreeString() + " (discarding)");
                        else {
                                addToBounds(co);
                                last = co;
                        }
                }
        }

        public void insertPointsAtStart(List<Coord> additionalPoints) {
                testForConsecutivePoints(additionalPoints);
                points.get(0).preserved(true);
                points.addAll(0, additionalPoints);
                points.remove(additionalPoints.size()-1);       //End node exists now twice
        }

        public void insertPointsAtEnd(List<Coord> additionalPoints) {
                testForConsecutivePoints(additionalPoints);
                additionalPoints.get(0).preserved(true);
                points.remove(points.size()-1);
                points.addAll(additionalPoints);
        }

        public boolean isDirection() {
                return direction;
        }

        public void setDirection(boolean direction) {
                this.direction = direction;
        }

        public boolean isRoad() {
                return false;
        }

        /**
         * Get the mid-point of the bounding box for this element.  This is as good
         * an indication of 'where the element is' as any.  Previously we just
         * used the location of the first point which would lead to biases in
         * allocating elements to subdivisions.
         *
         * @return The mid-point of the bounding box.
         */
        public Coord getLocation() {
                return new Coord((minLat + maxLat) / 2, (minLong + maxLong) / 2);
        }

        /**
         * We build up the bounding box of this element by calling this routine.
         *
         * @param co The coordinate to add.
         */
        private void addToBounds(Coord co) {
                int lat = co.getLatitude();
                if (lat < minLat)
                        minLat = lat;
                if (lat > maxLat)
                        maxLat = lat;

                int lon = co.getLongitude();
                if (lon < minLong)
                        minLong = lon;
                if (lon > maxLong)
                        maxLong = lon;
        }

        /**
         * Get the region that this element covers.
         *
         * @return The area that bounds this element.
         */
        public Area getBounds() {
                return new Area(minLat, minLong, maxLat, maxLong);
        }

}