StephenWei – Page 29

VTK

Matrix Multiplication And vtkTransform Concatenate

We can use vtkTransform’s function concatenate to do matrix multiplication. There are three matrix which have the mathematical relationship. It’s equivalent to the following code. vtkSPtrNew( C, vtkTransform ); C->Concatenate(B); C->Concatenate(A); C->Update(); The experimental code: #include <iostream> #include <vtkSmartPointer.h> #include <vtkTransform.h> #define vtkSPtr vtkSmartPointer #define vtkSPtrNew(Var, Type) vtkSPtr<Type> Read more…

By StephenWei, 2 years ago

VTK

clear items in vtkCellPicker’s list before destructing

We have to clear actors in vtkCellPicker object before InitializePickList. In the function Pick, the picker object will addItem to increase its reference count. So we need to do the following tasks for picker object in class destructor function to avoid crash or weird visible bug.

By StephenWei, 2 years2 years ago

Shell

Shell Script – Rename Files’ Suffixes One By One

The following shell script is used to rename the files suffix at the current directory. After giving it the executable permission, we can use it like Code snippet: Result:

By StephenWei, 2 years2 years ago

Mac

Shell Script – Rename Files One By One

The following shell script is used to rename the files at the current directory. After giving it the executable permission, we can use it like Code snippet: Result:

By StephenWei, 2 years2 years ago

VTK

Create Oriented Bounding Box Based On Three Custom Axis

The post shows how to generate an oriented bounding box based on the three axis known in advance. The 3D model is displayed by a CUModel object. We will calculate the two farthest points, positive farthest point and negative farthest point along the special direction. Then generate a polydata from Read more…

By StephenWei, 2 years2 years ago

Tool

3D Model Editor – Put Model To Original Position

I mainly focus on coding for software development at work. If we need some complicated 3D models, other colleagues in charge of data production will provide relevant model files. 在工作的时候，我们做软件研发主要专注于代码编写，如果需要一些复杂的3D模型的话，则要负责数据生产的同事提供相关的模型文件。 But sometimes they give us a model that’s not at the ideal position in the 3D world, and I often Read more…

By StephenWei, 2 years2 years ago

Tool

Download EPUB And Read It On Kindle Device

Work platform: Ubuntu Download and install calibre on Ubuntu. sudo -v && wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sudo sh /dev/stdin Download book in the z library website https://z-lib.org. Chinese books on https://zh.z-lib.org/ . Add your book and convert it to an another format by calibre. Add the new book as attachment Read more…

By StephenWei, 2 years2 years ago

Web

Change The Default Root Directory In A React Project

Change Default Root Directory In React Project We will get a default root directory in the html file to access after run npm run build. For example, there is <script src=”/static/js/2.665e3ec0.chunk.js”> in index.html. How to change the default root direction ? We can configure our react project. Add this line Read more…

By StephenWei, 2 years10 months ago

Tool

The Process Of Making The Online Tool Images To Mp4

The web page for Images To MP4:https://www.weiy.city/image-processing/images-to-mp4/ We created python scripts. When a user uploads a picture ZIP file, a video compression package is generated. Read the pictures and convert it to the same size. Write to a new video file and compress it. Create a new web page to Read more…

By StephenWei, 2 years2 years ago