A lightweight header-only geometry library for Modern C++
- Inspired by python shapely
- Based on OGC Simple Features
- Built on top of STL containers
shapes ships as a header-only library:
#include <simo/shapes.hpp>
using namespace simo::shapes;Building a Point from GeoJSON:
auto p = Point::from_json(R"({"type": "Point", "coordinates": [1.0, 2.0]})");
std::cout << p.x << " " << p.y << " " << '\n';GeoJSON representation of a 3d Point:
auto p = PointZ{1, 2, 3};
std::cout << p.json() << '\n';{"coordinates":[1.0,2.0,3.0],"type":"Point"}Iterating a MultiPoint is as simple as:
auto mp = MultiPoint{{0, 0}, {1, 2}, {4, 5}, {7, 7}};
for(const auto& p: mp)
{
std::cout << p.x << " " << p.y << '\n';
} WKT representation of a MultiPoint:
auto mp = MultiPointZ{{1.0, 2.0, 3.0}, {4.0, 5.0, 6.0}};
std::cout << mp.wkt() << '\n';MULTIPOINTZ((1.0 2.0 3.0),(4.0 5.0 6.0))
Creating a LineString from a google polyline:
std::string polyline = "_p~iF~ps|U_ulLnnqC_mqNvxq`@";
auto ls = LineString::from_polyline(polyline);
std::cout << points.wkt() << '\n';LINESTRING(-120.2 38.5,-120.95 40.7,-126.453 43.252)
Google Polyline representation of a LineString:
auto ls = LineString{{-120.2, 38.5}, {-120.95, 40.7}, {-126.453, 43.252}};
std::cout << ls.polyline() << '\n';_p~iF~ps|U_ulLnnqC_mqNvxq`@
Building a MultiLineString:
auto ml = MultiLineString{
{{1.0, 2.0}, {4.0, 5.0}, {7.0, 8.0}},
{{11.0, 12.0}, {13.0, 14.0}, {16.0, 17.0}}
};Applying a basic transformation to a MultiPoint:
auto mp = MultiPoint{{1.0, 2.0}, {3.0, 4.0}};
std::transform(mp.begin(), mp.end(), mp.begin(), [](const Point& p) -> Point {
return {p.x + 10, p.y + 10};
});
std::cout << mp.wkt() << '\n';MULTIPOINT((11 12),(13 14))
This project would not have been possible without the following amazing tools, many thanks to its developers!
Copyright (c) 2019 Pavel Simó
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.