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…
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…
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…
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…
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…
3D Model Editor – Linear Transform Tester There are many magical properties in matrix computation, such as: AB != BA A != 0, B != 0, but maybe AB = 0. AB = AC, A != 0, but we can’t get that B = C. People couldn’t understand why it Read more…
The eigenvector of a linear transformation doesn’t change in the transformation, and the scale of this vector under the transformation is called the eigenvalue. Practice We use 3D Model Editor to perform the following linear transformation: For more information on how to use the web app 3D Model Editor to Read more…
There are many magical properties in matrix computation, such as: AB != BA A != 0, B != 0, but maybe AB = 0. AB = AC, A != 0, but we can’t get that B = C. People couldn’t understand why it was so different from ordinary numerical calculations Read more…
你永远是镜头焦点…… You are always the focus of the lens 初学者第一次购买相机都会选择套机。 导购员会说：一支变焦镜头一镜走天下， 适合在不同场合中使用，基本满足日常所需。 Beginners will choose a set of cameras for the first time. The shopping guide will say: a zoom lens and a mirror go to the world, Suitable for use in different occasions, basically meet daily needs. 通常来说，使用变焦镜头想要有大光圈，就得付出非常昂贵代价，而定焦头用「白菜价钱」就可以轻易买到「烧鹅味道」的大光圈镜头。 光圈越大，搜集的光线比小光圈的变焦镜头多，可以轻易制造浅景深的效果，在晚上或室内弱光环境下不用调高感光度（ISO）就可以拍到所想的照片。加上定焦镜头的构造纯粹，素质往往都会比变焦镜头高，而且价钱相宜，物美价廉谁能不爱。 Read more…