boost

问题 i want to write a c++ class with PyObjects to access them from Python to reference them with an existing Python object instance. In short words i want to store/manage Python object instances in the C++ class. For example: struct Var { PyObject *Test_1; PyObject *Test_2; }; #include <boost/python.hpp> using namespace boost::python; BOOST_PYTHON_MODULE(Var) { class_<Var>("Var", init<std::string>()) .def_readwrite("Test_1", &Var::value) .def_readwrite("Test_2", &Var::value) ; } in python i want

问题 I'm trying to find algorithm that will find two points that represent closest distance between two rectangles. Like points C and J that form smallest distance on image below: I'm trying to not reinvent the wheel here and use something that is already battletested like boost::geometry::distance, but it only return distance and not also the points. 回答1: Not making things overly generic (by assuming floating point coordinates and cartesian coordinate system), here's an implementation of point-to

问题 I'm trying to find algorithm that will find two points that represent closest distance between two rectangles. Like points C and J that form smallest distance on image below: I'm trying to not reinvent the wheel here and use something that is already battletested like boost::geometry::distance, but it only return distance and not also the points. 回答1: Not making things overly generic (by assuming floating point coordinates and cartesian coordinate system), here's an implementation of point-to

问题 I'm trying to find algorithm that will find two points that represent closest distance between two rectangles. Like points C and J that form smallest distance on image below: I'm trying to not reinvent the wheel here and use something that is already battletested like boost::geometry::distance, but it only return distance and not also the points. 回答1: Not making things overly generic (by assuming floating point coordinates and cartesian coordinate system), here's an implementation of point-to

问题 I'm creating a server / client paradigm using UDP, but the Rust server is not receiving the C++ client messages. I have been able to successfully do Rust server / Rust client and C++ server / Rust client communication. This leads me to believe that there is an issue with my C++ code, or there is some type of miscommunication when sending C++ buffers to Rust, but I have used code that I beleive works. This is only being sent from and to the same computer and has not been expanded to computer

问题 How can I get data from JSON with array as root node by using Boost.PropertyTree? [ { "ID": "cc7c3e83-9b94-4fb2-aaa3-9da458c976f7", "Type": "VM" } ] 回答1: The array elements are just values with a key named "" for property tree: for (auto& array_element : pt) { for (auto& property : array_element.second) { std::cout << property.first << " = " << property.second.get_value<std::string>() << "\n"; } } Prints ID = cc7c3e83-9b94-4fb2-aaa3-9da458c976f7 Type = VM Live On Coliru #include <boost

问题 I have code that resembles below. typedef uint32_t IntType; typedef IntType IntValue; typedef boost::variant<IntValue, std::string> MsgValue; MsgValue v; Instead of saying this, IntValue value = boost::apply_visitor(d_string_int_visitor(), v); I would like to pass an extra parameter like this: But operator() gives a compile error. //This gives an error since the overload below doesn't work. IntValue value = boost::apply_visitor(d_string_int_visitor(), v, anotherStr); class d_string_int

问题 From the following code I calculate the intersection of two polygons. I hope the output can be NULL if it is not polygon. However the output is (((240, 52.9999), (240, 53), (240, 53), (240, 52.9999))). This is not a polygon. Is there any way to check whether the output is really a polygon?? #include <iostream> #include <deque> #include <vector> #include <boost/geometry.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/polygon.hpp> #include <boost

问题 I am trying to build Boost 1_74_0 for Clang on Windows 7. I go to the folder with bootstrap etc and run: bootstrap --with-toolset=clang-win but I get: Building Boost.build engine Failed to build Boost.build engine and the log says: Found with vswhere Visual Studio Locator version 2.5.2+gebb9f26a3d ### ### "Unknown toolset: vcunk" ### ### You can specify the toolset as the argument, i.e.: ### .\build.bat msvc ### ### Toolsets supported by this script are: borland, como, gcc, ### gcc-nocygwin,

问题 I am trying to build Boost 1_74_0 for Clang on Windows 7. I go to the folder with bootstrap etc and run: bootstrap --with-toolset=clang-win but I get: Building Boost.build engine Failed to build Boost.build engine and the log says: Found with vswhere Visual Studio Locator version 2.5.2+gebb9f26a3d ### ### "Unknown toolset: vcunk" ### ### You can specify the toolset as the argument, i.e.: ### .\build.bat msvc ### ### Toolsets supported by this script are: borland, como, gcc, ### gcc-nocygwin,