I took books’ information from the MySQL database and tried to analyze the relation between price, score, and the number of commentators. The books’ sales information is collected from amazon as described in the article Find The Book Wanted In Amazon By Python, you can read it if you are Read more…
I used vtkSelectPolyData to find the center area in the circle on the surface of the tooth. But it often failed to give me a satisfying result but showed the error, Can’t follow edge. The worse situation is that it crashed when I tried to access the scalar in point data. Read more…
A 3D model may be composed of a few different parts. We want to find all the independent parts. In the following code snippet, the interface GetConnectedCellIds can help us to find all the parts, DrawCells will mark a part which is represented by some cell ids red color.
The article introduces two different ways to color a cube, pointData scalars and cellData scalars.The implementations for them are in the following part. PointData Scalars Create a cube in which every side plane is formed by triangles. Every point has a different scalar value for color transform. CellData Scalars Create Read more…
I upgrade my server OS to CentOS 8.1, besides that the PHP, WordPress, and apache had been also upgraded to the latest version. All data had been back up by plugin UpdraftPlus, I planned to use it to restore my website. Here are some problems I met when I restored Read more…
To find a high-quality book on amazon kindle store, I collect some books information and analyze them. The process can be divided into two main parts. Part 1. Download books’ information and save them to the database. We use BeautifulSoup to collect all books’ divs on the web page, convert Read more…
单纯看“Can’t follow edge”的错误提示，我没能得到有价值的线索。不管怎么说，在使用该对象处理数据之前居然需要写读一遍信息本身就显得很诡异，或者，这就是VTK8.2上的一个bug？也许，当我升级VTK之后才能找到答案。
The article introduces how to expand the sampling area from a cell. I marked the area red color, the center point is computed as the mass center of the original cell. Step 1, find all cells which are near to the center point within a distance. We can use the Read more…
I wanted to find the area in the black circle on the tooth surface, so the algorithm class vtkSelectPolyData was used in my project. The idealized result looks like the following picture. Unfortunately, I got the bad region as this scene. After reading the source code about vtkSelectPolyData, I found Read more…