Examples with Subdivision uk.me.parabola.imgfmt.app.trergn.Subdivision used on opensource projects

Example 6 with Subdivision

use of uk.me.parabola.imgfmt.app.trergn.Subdivision in project mkgmap by openstreetmap.

the class Map method topLevelSubdivision.

/**
 * Create the top level division. It must be empty afaik and cover
 * the whole area of the map.
 *
 * @param area The whole map area.
 * @param zoom The zoom level that you want the top level to be
 * at.  Its going to be at least level 1.
 * @return The top level division.
 */
public Subdivision topLevelSubdivision(Area area, Zoom zoom) {
    // May not always be necessary/desired
    zoom.setInherited(true);
    InternalFiles ifiles = this;
    Subdivision sub = Subdivision.topLevelSubdivision(ifiles, area, zoom);
    rgnFile.startDivision(sub);
    return sub;
}

Example 7 with Subdivision

use of uk.me.parabola.imgfmt.app.trergn.Subdivision in project mkgmap by openstreetmap.

the class MapReader method pointsForLevel.

/**
 * Get a list of all the points for a given level.
 * @param level The level, lower numbers are the most detailed.
 */
public List<Point> pointsForLevel(int level, boolean withExtType) {
    List<Point> points = new ArrayList<Point>();
    Subdivision[] subdivisions = treFile.subdivForLevel(level);
    for (Subdivision sd : subdivisions) {
        List<Point> subdivPoints = rgnFile.pointsForSubdiv(sd, withExtType);
        points.addAll(subdivPoints);
    }
    return points;
}

Example 8 with Subdivision

use of uk.me.parabola.imgfmt.app.trergn.Subdivision in project mkgmap by openstreetmap.

the class MapBuilder method makeMapAreas.

/**
 * Drive the map generation by stepping through the levels, generating the
 * subdivisions for the level and filling in the map elements that should
 * go into the area.
 *
 * This is fairly complex: you need to divide into subdivisions depending on
 * their size and the number of elements that will be contained.
 *
 * @param map The map.
 * @param src The data for the map.
 */
private void makeMapAreas(Map map, LoadableMapDataSource src) {
    // The top level has to cover the whole map without subdividing, so
    // do a special check to make sure.
    LevelInfo[] levels = null;
    if (src instanceof OverviewMapDataSource) {
        mergeLines = true;
        prepShapesForMerge(src.getShapes());
        mergeShapes = true;
        levels = src.mapLevels();
    } else {
        if (OverviewBuilder.isOverviewImg(map.getFilename())) {
            levels = src.overviewMapLevels();
        } else {
            levels = src.mapLevels();
        }
    }
    if (levels == null) {
        throw new ExitException("no info about levels available.");
    }
    LevelInfo levelInfo = levels[0];
    // If there is already a top level zoom, then we shouldn't add our own
    Subdivision topdiv;
    if (levelInfo.isTop()) {
        // There is already a top level definition.  So use the values from it and
        // then remove it from the levels definition.
        levels = Arrays.copyOfRange(levels, 1, levels.length);
        Zoom zoom = map.createZoom(levelInfo.getLevel(), levelInfo.getBits());
        topdiv = makeTopArea(src, map, zoom);
    } else {
        // We have to automatically create the definition for the top zoom level.
        int maxBits = getMaxBits(src);
        // decrease it so that it is less.
        if (levelInfo.getBits() <= maxBits)
            maxBits = levelInfo.getBits() - 1;
        // Create the empty top level
        Zoom zoom = map.createZoom(levelInfo.getLevel() + 1, maxBits);
        topdiv = makeTopArea(src, map, zoom);
    }
    // We start with one map data source.
    List<SourceSubdiv> srcList = Collections.singletonList(new SourceSubdiv(src, topdiv));
    // Now the levels filled with features.
    for (LevelInfo linfo : levels) {
        List<SourceSubdiv> nextList = new ArrayList<>();
        Zoom zoom = map.createZoom(linfo.getLevel(), linfo.getBits());
        for (SourceSubdiv srcDivPair : srcList) {
            MapSplitter splitter = new MapSplitter(srcDivPair.getSource(), zoom);
            MapArea[] areas = splitter.split(orderByDecreasingArea);
            log.info("Map region", srcDivPair.getSource().getBounds(), "split into", areas.length, "areas at resolution", zoom.getResolution());
            for (MapArea area : areas) {
                Subdivision parent = srcDivPair.getSubdiv();
                Subdivision div = makeSubdivision(map, parent, area, zoom);
                if (log.isDebugEnabled())
                    log.debug("ADD parent-subdiv", parent, srcDivPair.getSource(), ", z=", zoom, " new=", div);
                nextList.add(new SourceSubdiv(area, div));
            }
            if (nextList.size() > 0) {
                Subdivision lastdiv = nextList.get(nextList.size() - 1).getSubdiv();
                lastdiv.setLast(true);
            }
        }
        srcList = nextList;
    }
}