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));
}
}
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;
}