Draw The Plane Manually We can create a big plane if we know its origin and normal. The algorithm class vtkPlaneSource is a solution for it, but the generated plane is too small, it’s hard to create a big plane based on vtkPlaneSource, so I wrote a function for the Read more…
They are many different cells in VTK, they can be divided into two kinds, linear cells, and non-linear cells. The following images are from VTKUsersGuide. Linear Cells Non-Linear Cells Although vtkUnstructuredGrid and vtkPolyData are similar, there are substantial differences. vtkPolyData can only represent cells of topological dimension 2 or less Read more…
Here is relevant introduction about vtkImageData from VTKUsersGuide. A vtkImageData dataset is defined by data dimensions, interpoint spacing, and the origin (i.e., lower-left corner) of the dataset. If the dimension of the dataset is two, then we call the vtkImageData dataset an image, and it is composed of vtkPixel cell Read more…
Last night I read some pages in VTKUsersGuide to learn VTK factory mechanism. I got the basic steps of defining my own factory and use it. Implement virtual function which is declared in vtkObjectFactory. virtual const char* GetVTKSourceVersion(); virtual const char* GetDescription(); Create Object Use the protected function RegisterOverride which Read more…
Email is used in our working frequently, we have to send emails to different people, it is too boring to send similar content to different friends manually. Python can help us to handle the task successfully, we need to use the library smtplib and email.mime.text. I use my sina account Read more…
Almost every developer know how to implement the bubble sort for a simple array. We just need to travel over the array in two levels and swap the adjacent elements in the second level if their values’ order is not correct. The algorithm implement with Python is in the following Read more…
Shun is the last king of five emperors, his father is blind, but he has two pupils for every single eye, so the man is also named ChongHua. Shun lost her mother since he was very young, his father married a woman as his new wife, this woman born a Read more…
Many git commands have a interesting option –patch or -p for short, it allows a user to go through every change and asks what to do instead of adding all changes in the file to a new index. git add -p Developer often edits the same file multiple times and Read more…
Read a single txt file and indent every paragraph. myReader.py def getText( filePath ): with open( filePath ) as file: content = file.read() paragraphs = content.split( ‘\n’ ) file.close() newContent = “” for para in paragraphs: newContent = newContent + ” ” + para + “\n” return newContent main.py import Read more…