CPlusPlus – Page 3 – weiy

CPlusPlus

VTK – Combine Two Mesh Objects To One

The article shows how to combine two mesh objects to one based on VTK. The code snippet is in the following part. #include <iostream> #include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkActor.h> #include <vtkConeSource.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkPolyDataMapper.h> #include <vtkRenderWindowInteractor.h> #define vtkPtr( var, className ) vtkSmartPointer<className> var = \ vtkSmartPointer<className>::New() Read more…

By StephenWei, 3 years ago

CMake

C++ : Create Same BasicIO Functions For Cross-platform Compatibility

I write a few file IO functions which are used in windows and mac os x. bool CopyAFile(const std::string inFile, const std::string outFile); bool RemoveFile(const std::string filePath); void RemoveDir(const std::string folderPath); void MoveAFile(const std::string oldFile, const std::string newFile); void CheckFolderExist(const std::string folderPath); bool FileExists( const std::string path ); void HandleLastSlash( Read more…

By StephenWei, 3 years ago

Algorithm

CPP : typeid.name and initializer_list

typeid.name The function typeid.name can give us the information about variable. Header file: typeinfo #include <typeinfo> int main() { vector<bool> vec{ false, true }; auto ans = vec[0]; cout << typeid(ans).name() << endl; bool tmp = false; cout << typeid(tmp).name() << endl; int value = 12; cout << typeid(value).name() << Read more…

By StephenWei, 3 years3 years ago

CPlusPlus

Universal Reference, std::move, std::array And Judge Data Type

The parameter reference is frequently used CPlusPlus program, C++11 support copy construction and move construction for a new object, Use typeinfo or boost::typeindex to judge the variable’s data type information, The container std::array help us to manage a fixed size array.

By StephenWei, 3 years ago

CPlusPlus

call back – std::bind and std::function

The function template std::bind generate a forwarding call wrapper of origin function, it returns a function object.
We can just call the wrapper to invoke the origin function.
The class template std::function is function wrapper, the instance of it can be copied and store.

By StephenWei, 3 years3 years ago

CPlusPlus

Write C++ / C Code For Godot

Create a library project in the outside IDE such as Virtual Studio and Qt Creator. Write our custom C++ class to add more functionalities for the Godot node.

By StephenWei, 3 years3 years ago

CPlusPlus

CPP: Use Friend Class To Split Task

There is a massive module in my project, it computes many data tasks, update UI, and is responsible for interaction style. I want to move the user interaction part to another viewer class, make the old module more lightweight. The structure of the module class looks like the following snippet. Read more…

By StephenWei, 3 years ago

CPlusPlus

Simple Example Using OpenCV By CPP And Python

The article introduces how to display an image by OpenCV in CPlusPlus and Python language. The user can exit the whole program when he presses the ESC key. CPP CMakeLists.txt macro(use_cxx11) if (CMAKE_VERSION VERSION_LESS “3.1”) if (CMAKE_CXX_COMPILER_ID STREQUAL “GNU”) set (CMAKE_CXX_FLAGS “${CMAKE_CXX_FLAGS} -std=gnu++11”) endif () else () set (CMAKE_CXX_STANDARD 11) Read more…

By StephenWei, 4 years4 years ago

CPlusPlus

How To Write And Read XML File By Qt

The Extensible Markup Language(XML) can be read by humans and machines, it requires all markups must be paired and case sensitive. The article shows how to write and read the XML file in the Qt environment. Write Data To The Local XML File Create a DOM element by QDomDocument object Read more…

By StephenWei, 4 years4 years ago

XML To JSON
: Input your strings, the tool can convert XML to JSON for you.

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