C++ (Cpp) line_string Examples

Example #1

File: geometry_equal.hpp Project: mapbox/mapnik-vector-tile

    void operator() (mapnik::geometry::line_string<T> const& ls1, mapnik::geometry::line_string<T> const& ls2)
    {
        if (ls1.size() != ls2.size())
        {
            REQUIRE(false);
        }

        for(auto const& p : zip_crange(ls1, ls2))
        {
            REQUIRE(p.template get<0>().x == Approx(p.template get<1>().x));
            REQUIRE(p.template get<0>().y == Approx(p.template get<1>().y));
        }
    }

Example #2

File: vector_tile_geometry_encoder.hpp Project: frankrowe/mapboxgltest

inline bool encode_geometry(mapnik::geometry::line_string<std::int64_t> const& line,
                        vector_tile::Tile_Feature & current_feature,
                        int32_t & start_x,
                        int32_t & start_y)
{
    std::size_t line_size = line.size();
    if (line_size <= 0)
    {
        return false;
    }
    unsigned line_to_length = static_cast<unsigned>(line_size) - 1;

    enum {
        move_to = 1,
        line_to = 2,
        coords = 3
    } status = move_to;

    for (auto const& pt : line)
    {
        if (status == move_to)
        {
            status = line_to;
            current_feature.add_geometry(9); // 1 | (move_to << 3)
        }
        else if (status == line_to)
        {
            status = coords;
            current_feature.add_geometry(encode_length(line_to_length));
        }
        int32_t dx = pt.x - start_x;
        int32_t dy = pt.y - start_y;
        // Manual zigzag encoding.
        current_feature.add_geometry(protozero::encode_zigzag32(dx));
        current_feature.add_geometry(protozero::encode_zigzag32(dy));
        start_x = pt.x;
        start_y = pt.y;
    }
    return true;
}

Example #3

File: geometry_adapters.hpp Project: DavidLiuGitHub/mapnik

inline typename mapnik::geometry::line_string<CoordinateType>::const_iterator
range_end(mapnik::geometry::line_string<CoordinateType> const& line) {return line.end();}

Example #4

File: geometry_adapters.hpp Project: DavidLiuGitHub/mapnik

inline typename mapnik::geometry::line_string<CoordinateType>::iterator
range_begin(mapnik::geometry::line_string<CoordinateType> & line) {return line.begin();}

Example #5

File: geometry_is_empty.hpp Project: Airphrame/mapnik

 bool operator() (mapnik::geometry::line_string<double> const& geom) const
 {
     return geom.empty();
 }