Function pathObjectToPolygons

src/core/objects/boolean_tool.cpp:564–609

}

void pathObjectToPolygons(
        const PathObject* object,
        ClipperLib::Paths& polygons,
        PolyMap& polymap)
{
	object->update();
	auto coords = object->getRawCoordinateVector();
	
	polygons.reserve(polygons.size() + object->parts().size());
	
	for (const auto& part : object->parts())
	{
		const PathCoordVector& path_coords = part.path_coords;
		auto path_coords_end = path_coords.size();
		if (part.isClosed())
			--path_coords_end;
		
		ClipperLib::Path polygon;
		polygon.reserve(path_coords_end);
		for (auto i = 0u; i < path_coords_end; ++i)
		{
			auto& path_coord = path_coords[i];
			if (path_coord.param == 0.0)
			{
				auto point = coords[path_coord.index];
				polygon.push_back(ClipperLib::IntPoint(point.nativeX(), point.nativeY()));
			}
			else
			{
				auto point = MapCoord { path_coord.pos };
				polygon.push_back(ClipperLib::IntPoint(point.nativeX(), point.nativeY()));
			}
			polymap.insertMulti(polygon.back(), std::make_pair(&part, &path_coord));
		}
		
		bool orientation = Orientation(polygon);
		if ( (&part == &object->parts().front()) != orientation )
		{
			std::reverse(polygon.begin(), polygon.end());
		}
		
		// Push_back shall move the polygon.
		static_assert(std::is_nothrow_move_constructible<ClipperLib::Path>::value, "ClipperLib::Path must be nothrow move constructible");
		polygons.push_back(polygon);
	}
}

void polygonToPathPart(const ClipperLib::Path& polygon, const PolyMap& polymap, PathObject* object)
{