StephenWei – Page 47

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

CMake

Add Subdirectory In CMake Project

Add subdirectories and use VTK library and Qt in my projects. The file structure looks like the following image. projectB generates lib and dll files which will be used by projectA. projectA show a window and print message from Base class in projectB. The file CMakeLists.txt in the root directionary 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

Tool

The Common Mathematical Notations in 《Geometric Tools for Computer Graphics》

By StephenWei, 3 years3 years ago

Algorithm

C++ Exercises: Data Structure II

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…

By StephenWei, 3 years3 years ago

Algorithm

C++ Exercises: Data Structure I

Exercises: 448. Find All Numbers Disappeared in an Array Given an array nums of n integers where nums[i] is in the range [1, n], return an array of all the integers in the range [1, n] that do not appear in nums.Solution: use set to record all numbers had showed and find the the rest disappeared numbers. Tips: you can also increase Read more…

By StephenWei, 3 years1 year ago

Algorithm

C++ Exercises: Bit Operation

Exercises: 461. Hamming Distance Calculate the number of positions at which the corresponding bits are different. Solution: Do XOR and find the number of 1. class Solution { public: int hammingDistance(int x, int y) { int tmp = x ^ y; int ans = 0; while( tmp > 0 ){ if( Read more…

By StephenWei, 3 years3 years ago

VTK

VTK – Set Scalar Range And Show Different Colors

We will compute the distance to the sphere for every point. Write the distance value to point data as scalars. Set different colors for the different distance ranges.

By StephenWei, 3 years ago