• Learning the coordinate system of 3D visualization from scratch


    1. World coordinate system2. Parent object coordinate system3. Self coordinate systemTo control the spatial position of a 3D visualization object, we first need to understand the spatial coordinate system. In thingjs development platform, the right-hand coordinate system is used, the horizontal axis is x axis and Z axis, and the vertical axis is Y axis […]

  • What is the economic support of the popular NFT


    At present, the new online celebrity NFT has successfully stepped out of the circle and quickly spread to all walks of life with an overwhelming posture. The climax comes in an auction, and the high auction value constantly refreshes the world’s cognition. You may be hard to imagine that the virtual product NFT will enter […]

  • Visual studio 2019 method for creating C + + Hello World Project


    Recently prepared to enter the pit C++ Use visual studio to configure C + + environment. Although visual studio is cumbersome, it is easy ~ ~. After installation, you can run C + + code without caring about anything: P However, there is a very embarrassing problem when starting the project. Keep the record simple. […]

  • What are some interesting and little-known websites?


    Extended reading What are some interesting and little-known websites? A note of siege lion Collect excellent projects on GitHub every day Some interesting Folktales Super easy to use Google browser, sublime text, phpstorm, oil monkey plug-in collection The best of websites First website (the first website in the world)http://info.cern.ch/ Waterdrop (the world’s smallest website)http://www.guimp.com/ The […]

  • GitHub global digital annual report: join hands to promote super collaboration in the open source world


    On January 24, 2020, the wuhan2020 open source project was officially launched, attracting aboutMore than 3000Technical volunteers andMore than 1000 bitsNon technical volunteers carry out volunteer action and participation online. * * Wuhan2020 Agreement after establishmentThreeDuring the month, we launched volunteer support and work collaboration on the Internet through open source collaborationFiveWebsite / APP,23GitHub code […]

  • Xiaobai’s confession


    When you find that the world can be described by code, you really understand the world. If you don’t work hard, you can’t get success. I hope that my little white programmer can really become a proper code master, not for anything else, just for a better future. This work adoptsCC agreementThe author and the […]

  • Figure slam: Guide to simultaneous localization and mapping of noob


    By krunal KshirsagarCompile | FlinSource | medium What is slam? Simultaneous localization and mapping (SLAM) is used for the parallel construction of the environment model (map) and the state estimation of the mobile robots in it. In other words, slam provides you with a way to track the robot’s position in the world in real […]

  • Learn how to make CSS wave text animation effect in 5 minutes


    Video demo address: https://mp.weixin.qq.com/s/GH… Source code index.html <!DOCTYPE html> <html lang=”en”> <head> <meta charset=”UTF-8″> <meta name=”viewport” content=”width=device-width, initial-scale=1.0″> <meta http-equiv=”X-UA-Compatible” content=”ie=edge”> <link href=”./style.css” rel=”stylesheet”> < title > CSS wave text animation effects <link> </head> <body> The official account of “CSS special effects world” regularly shares CSS effects > <div class=”wavy”> < span style = — […]

  • When the data is stored in the database, why can duplicate records occur when the data is logically protected from duplication?


    In many abnormal situations, such as high concurrency and bad network, there are occasionally duplicate records in the database. If there is a book list now, the structure is similar to this +—-+————–+ | id | name | +—-+————–+ |1. A brief history of the world| +—-+————–+ In case of exception, the following records may […]

  • Implementation code of spring boot Hello World


    This article is the introduction to springboot. Without any additional tools, we create a spring boot web project from scratch and run it. Project construction In the final analysis, spring boot is just a framework, a few jars, nothing magical. However, the process of creating a project with spring initializr blocks a lot of information, […]

  • http://javaexception.com/archives/221


    Copyright notice: This is the original article of xing’star. Please indicate the source for reprint! This article is synchronized from http://javaexception.com/archives/221 Circle expand scale animation Key code: final Animator circularReveal = ViewAnimationUtils.createCircularReveal(subsamplingScaleImageView, SystemUtils.getWindowWidth() / 2, ivScreenShot.getHeight() / 2, 0, SystemUtils.getWindowHeight() / 2); circularReveal.setInterpolator(new DecelerateInterpolator()); circularReveal.setDuration(400); circularReveal.start();   The effects of the apps on the shelves […]

  • Nodejs installation


    Nodejs supports cross platform operation. It can basically run on all operating systems, corresponding to different operating systems, and installed in different ways. Official website of nodejs: https://nodejs.org corresponding Chinese website: http://nodejs.cn/ Tend to English website, Chinese website will have a great delay after all. Installation of windows system: no more details. Download the corresponding […]