A few macros we need in our project are in the following code snippet. They can make our project cleaner. #define vtkPtr( var, className ) vtkSmartPointer<className> var = \ vtkSmartPointer<className>::New() #define CPP_SET_MACRO(name,type) \ void Set##name(type _arg) \ { \ if (this->name != _arg) \ { \ this->name = _arg; \ Read more…
Let’s read the history of user’s commitment by $ git log firstly. @{ } We can find details information about these commits by order with syntax @{ }. $ git show HEAD@{0} $ git show HEAD@{1} $ git show HEAD@{2} $ git show HEAD@{3} The syntax @{ } can also Read more…
Emperor Yao is a son of emperor Ku, the oldest son of Ku is Zhi, so Zhi became the new emperor after Ku died. But the new emperor is not good at handling political stuff, on the other hand, Yao always chose talented officials and deal with natural disasters in Read more…
I wrote some simple examples about handling excel with python in article Read Excel Table With Python. Now let’s deal with a more complex task, to combine two different tables based on a common column. Sheet0 Sheet1 Above two tables have the common column, 编号，the number of rows in sheet0 Read more…
VTK provides some convenient algorithms to help us display the whole digital elevation model (DEM). My university major is Geometry Information Science, it’s so exciting for me to write an article about DEM since I became a professional software develop programmer. In the following section, I will show how to Read more…
Develop environment: VTK-8.2.0 Qt Creator 4.9.0 Based on Qt 5.12.2 (MSVC 2017, 32 bit) CMake 3.14.3 CMake Generator: Visual Studio 16 2019 Configure compilers for my building kit C compiler： C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.21.27702/bin/Hostx64/x64/cl.exe CXX compiler： C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.21.27702/bin/Hostx64/x64/cl.exe More details are in the following image. We Read more…
The module openpyxl is a convenient tool for users to process data in an excel table. But it’s not build-in, we need to download the module manually after that developer can import and use it. The following code snippet shows how to read data in excel file with openpyxl. import Read more…
Download image files from website with Python.The module request can help us to fetch contents of web page, we can use BeautifulSoup to parse the html string and collect all interesting elements, download images by relevant URLs which are filtered by our script. import requests, sys, webbrowser, bs4, urllib if Read more…
vtkImageActor vtkImageActor is used to display picture in 3D render window. By changing the interactor to a vtkInteractorStyleImage you can limit rotations so that user can operate the 3D render window as a 2D image viewer. python code: import vtk fileName = “/Users/weiyang/Desktop/Untitled.png” reader = vtk.vtkPNGReader() reader.SetFileName( fileName ) reader.Update() Read more…