Examples with LineMergeFilter uk.me.parabola.mkgmap.filters.LineMergeFilter used on opensource projects

Example 1 with LineMergeFilter

use of uk.me.parabola.mkgmap.filters.LineMergeFilter in project mkgmap by openstreetmap.

the class MapBuilder method processLines.

/**
 * Step through the lines, filter, simplify if necessary, and create a map
 * line which is then added to the map.
 *
 * Note that the location and resolution of map elements is relative to the
 * subdivision that they occur in.
 *
 * @param map	The map to add points to.
 * @param div	The subdivision that the lines belong to.
 * @param lines The lines to be added.
 */
private void processLines(Map map, Subdivision div, List<MapLine> lines) {
    // Signal that we are beginning to draw the lines.
    div.startLines();
    int res = div.getResolution();
    FilterConfig config = new FilterConfig();
    config.setResolution(res);
    config.setLevel(div.getZoom().getLevel());
    config.setRoutable(doRoads);
    // Maybe more efficient if merging before creating subdivisions.
    if (mergeLines) {
        LineMergeFilter merger = new LineMergeFilter();
        lines = merger.merge(lines, res);
    }
    LayerFilterChain filters = new LayerFilterChain(config);
    if (enableLineCleanFilters && (res < 24)) {
        filters.addFilter(new RoundCoordsFilter());
        filters.addFilter(new SizeFilter(MIN_SIZE_LINE));
        if (reducePointError > 0)
            filters.addFilter(new DouglasPeuckerFilter(reducePointError));
    }
    filters.addFilter(new LineSplitterFilter());
    filters.addFilter(new RemoveEmpty());
    filters.addFilter(new RemoveObsoletePointsFilter());
    filters.addFilter(new LinePreparerFilter(div));
    filters.addFilter(new LineAddFilter(div, map, doRoads));
    for (MapLine line : lines) {
        if (line.getMinResolution() > res)
            continue;
        filters.startFilter(line);
    }
}