Exemple #1
0
mapnik::geometry::geometry<double> shape_io::read_polyline_parts(shape_file::record_type & record, std::vector<std::pair<int, int>> const& parts)
{
    mapnik::geometry::geometry<double> geom; // default empty
    int total_num_parts = record.read_ndr_integer();
    int num_parts = parts.size();
    mapnik::geometry::multi_line_string<double> multi_line;
    multi_line.reserve(num_parts);
    for (int k = 0; k < num_parts; ++k)
    {
        int start = parts[k].first;
        int end = parts[k].second;
        unsigned pos = 4 + 32 + 8 + 4 * total_num_parts + start * 16;
        record.set_pos(pos);

        mapnik::geometry::line_string<double> line;
        line.reserve(end - start);
        for (int j = start; j < end; ++j)
        {
            double x = record.read_double();
            double y = record.read_double();
            line.emplace_back(x, y);
        }
        multi_line.push_back(std::move(line));
    }
    geom = std::move(multi_line);
    return geom;
}
Exemple #2
0
void shape_io::read_bbox(shape_file::record_type & record, mapnik::box2d<double> & bbox)
{
    double lox = record.read_double();
    double loy = record.read_double();
    double hix = record.read_double();
    double hiy = record.read_double();
    bbox.init(lox, loy, hix, hiy);
}
Exemple #3
0
mapnik::geometry::geometry<double> shape_io::read_polygon(shape_file::record_type & record)
{
    mapnik::geometry::geometry<double> geom; // default empty
    int num_parts = record.read_ndr_integer();
    int num_points = record.read_ndr_integer();

    std::vector<int> parts;
    parts.resize(num_parts);
    std::for_each(parts.begin(), parts.end(), [&](int & part) { part = record.read_ndr_integer();});
    mapnik::geometry::polygon<double> poly;
    mapnik::geometry::multi_polygon<double> multi_poly;
    for (int k = 0; k < num_parts; ++k)
    {
        int start = parts[k];
        int end;
        if (k == num_parts - 1) end = num_points;
        else end = parts[k + 1];

        mapnik::geometry::linear_ring<double> ring;
        ring.reserve(end - start);
        for (int j = start; j < end; ++j)
        {
            double x = record.read_double();
            double y = record.read_double();
            ring.emplace_back(x, y);
        }
        if (k == 0)
        {
            poly.set_exterior_ring(std::move(ring));
        }
        else if (mapnik::util::is_clockwise(ring))
        {
            multi_poly.emplace_back(std::move(poly));
            poly.interior_rings.clear();
            poly.set_exterior_ring(std::move(ring));
        }
        else
        {
            poly.add_hole(std::move(ring));
        }
    }

    if (multi_poly.size() > 0) // multi
    {
        multi_poly.emplace_back(std::move(poly));
        geom = std::move(multi_poly);
    }
    else
    {
        geom = std::move(poly);
    }
    mapnik::geometry::correct(geom);
    return geom;
}
Exemple #4
0
mapnik::geometry::geometry<double> shape_io::read_polygon_parts(shape_file::record_type & record, std::vector<std::pair<int,int>> const& parts)
{
    mapnik::geometry::geometry<double> geom; // default empty
    int total_num_parts = record.read_ndr_integer();
    mapnik::geometry::polygon<double> poly;
    mapnik::geometry::multi_polygon<double> multi_poly;
    int num_parts = parts.size();
    for (int k = 0; k < num_parts; ++k)
    {
        int start = parts[k].first;
        int end = parts[k].second;
        unsigned pos = 4 + 32 + 8 + 4 * total_num_parts + start * 16;
        record.set_pos(pos);
        mapnik::geometry::linear_ring<double> ring;
        ring.reserve(end - start);
        for (int j = start; j < end; ++j)
        {
            double x = record.read_double();
            double y = record.read_double();
            ring.emplace_back(x, y);
        }
        if (k == 0)
        {
            poly.set_exterior_ring(std::move(ring));
        }
        else if (mapnik::util::is_clockwise(ring))
        {
            multi_poly.emplace_back(std::move(poly));
            poly.interior_rings.clear();
            poly.set_exterior_ring(std::move(ring));
        }
        else
        {
            poly.add_hole(std::move(ring));
        }
    }

    if (multi_poly.size() > 0) // multi
    {
        multi_poly.emplace_back(std::move(poly));
        geom = std::move(multi_poly);
    }
    else
    {
        geom = std::move(poly);
    }
    mapnik::geometry::correct(geom);
    return geom;
}
Exemple #5
0
void shape_io::read_polyline( shape_file::record_type & record, mapnik::geometry_container & geom)
{
    int num_parts = record.read_ndr_integer();
    int num_points = record.read_ndr_integer();
    if (num_parts == 1)
    {
        std::auto_ptr<geometry_type> line(new geometry_type(mapnik::LineString));
        record.skip(4);
        double x = record.read_double();
        double y = record.read_double();
        line->move_to(x, y);
        for (int i = 1; i < num_points; ++i)
        {
            x = record.read_double();
            y = record.read_double();
            line->line_to(x, y);
        }
        geom.push_back(line);
    }
    else
    {
        std::vector<int> parts(num_parts);
        for (int i = 0; i < num_parts; ++i)
        {
            parts[i] = record.read_ndr_integer();
        }

        int start, end;
        for (int k = 0; k < num_parts; ++k)
        {
            std::auto_ptr<geometry_type> line(new geometry_type(mapnik::LineString));
            start = parts[k];
            if (k == num_parts - 1)
            {
                end = num_points;
            }
            else
            {
                end = parts[k + 1];
            }

            double x = record.read_double();
            double y = record.read_double();
            line->move_to(x, y);

            for (int j = start + 1; j < end; ++j)
            {
                x = record.read_double();
                y = record.read_double();
                line->line_to(x, y);
            }
            geom.push_back(line);
        }
    }
}
Exemple #6
0
mapnik::geometry::geometry<double> shape_io::read_polyline(shape_file::record_type & record)
{
    mapnik::geometry::geometry<double> geom; // default empty
    int num_parts = record.read_ndr_integer();
    int num_points = record.read_ndr_integer();

    if (num_parts == 1)
    {
        mapnik::geometry::line_string<double> line;
        line.reserve(num_points);
        record.skip(4);
        for (int i = 0; i < num_points; ++i)
        {
            double x = record.read_double();
            double y = record.read_double();
            line.add_coord(x, y);
        }
        geom = std::move(line);
    }
    else
    {
        std::vector<int> parts;
        parts.resize(num_parts);
        std::for_each(parts.begin(), parts.end(), [&](int & part) { part = record.read_ndr_integer();});
        int start, end;
        mapnik::geometry::multi_line_string<double> multi_line;
        multi_line.reserve(num_parts);
        for (int k = 0; k < num_parts; ++k)
        {
            start = parts[k];
            if (k == num_parts - 1)
            {
                end = num_points;
            }
            else
            {
                end = parts[k + 1];
            }

            mapnik::geometry::line_string<double> line;
            line.reserve(end - start);
            for (int j = start; j < end; ++j)
            {
                double x = record.read_double();
                double y = record.read_double();
                line.add_coord(x, y);
            }
            multi_line.push_back(std::move(line));
        }
        geom = std::move(multi_line);
    }
    return geom;
}
Exemple #7
0
void shape_io::read_polygon(shape_file::record_type & record, mapnik::geometry_container & geom)
{
    int num_parts = record.read_ndr_integer();
    int num_points = record.read_ndr_integer();
    std::vector<int> parts(num_parts);

    for (int i = 0; i < num_parts; ++i)
    {
        parts[i] = record.read_ndr_integer();
    }

    for (int k = 0; k < num_parts; ++k)
    {
        std::auto_ptr<geometry_type> poly(new geometry_type(mapnik::Polygon));
        int start = parts[k];
        int end;
        if (k == num_parts - 1)
        {
            end = num_points;
        }
        else
        {
            end = parts[k + 1];
        }

        double x = record.read_double();
        double y = record.read_double();
        poly->move_to(x, y);

        for (int j=start+1;j<end-1;j++)
        {
            x = record.read_double();
            y = record.read_double();
            poly->line_to(x, y);
        }
        x = record.read_double();
        y = record.read_double();
        poly->close(x, y);

        geom.push_back(poly);
    }
}