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…
Exercises: 232. Implement Queue using Stacks Implement a first in first out (FIFO) queue using only two stacks. The implemented queue should support all the functions of a normal queue (push, peek, pop, and empty). Solution: take advantage of the features of both stacks #include <iostream> #include <set> #include <vector> #include <algorithm> #include <stack> Read more…
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.
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.
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.
I will show how to scale the string to follow the 3D model cone in the renderer by the following example.
Create class customIteractorStyle which inherited vtkInteractorStyleTrackballCamera
Let’s add three items to the render window. Draw a rectangle and pick all actors in the rectangle. The class vtkAreaPicker can help us to find these picked actors. I will show how to do it in the following code snippet. main.cpp CustomIteractorStyle.h CustomIteractorStyle.cpp But how to find the actors Read more…
I had tried to show display coordinate bounds of the 3D model in the article VTK: Show Display Bounds. But the result is not good enough because the process that transforms the world coordinate point to display the coordinate point can generate error as we rotate the camera. So I Read more…
Here is a curve in the 3D scene, the sphere represents its center. I want to find the axes of the 3D model just as vtkOBBTree, relative article: Explore The Orientation Of 3D Object. But all points on the curve are in the same plane, so neither vtkOBBTree nor vtkHull Read more…