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; }
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); }
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; }
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; }
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); } } }
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; }
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); } }