• HMS core insights · first live broadcast Preview


    Since the first real video game was designed in 1961, countless game developers have been pursuing the improvement of game image quality. In the current era, mobile phone is undoubtedly the most common game tool. Although it has certain restrictions on hardware compared with PC, the picture quality of mobile game is still gradually improving […]

  • Could not initialize class sun.awt.x11graphicsenvironment reported an error


    Could not initialize class sun.awt.x11graphicsenvironment error reporting solution Error message: Caused by: java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment Error reporting reason: The API of a java server to process images basically needs to run an X-server to use AWT (Abstract window toolkit). Therefore, the problem must be that the X-server function cannot be realized when […]

  • Isometric drawing of design discipline


    We live in a 3D world. So why insist on graphic design? Isometric design (the latest design trend) provides you with the advantages of both: isometric drawings are a bit like graphic design and 3D design. There are no converging perspective lines in 3D design. Isometric design is like your favorite Hollywood star. Isometric diagram […]

  • Message queue — rabbitmq simple to use


    Installation and use Address: http://www.rabbitmq.com/ You need to select different Erlang according to different versions Install Erlang To install rabbitmq, you first need to install the Erlang environment. Configure the yum source according to readme in Erlang on GitHub Write the above contents to the file marked with the red line, save, exit, and then […]

  • Page animation knowledge points sorting


    In my daily work, I will encounter some pages with animation. Here is an arrangement of the implementation knowledge of animation.The realization of page animation can be divided into two categories: CSS animation, canvas animation and JavaScript animation. JavaScript animation has nothing to say, so I won’t tidy it up here. CSS animation A property […]

  • Develop an H5 game from scratch (I) revisit the basic usage of canvas


    The game code corresponding to this series of articles has been open sourceSinuous game。 original intention From the idea of writing a small game to the completion of game development, it took about a week’s spare time. This process has accumulated some experience and penetrated some principles of game development. Here I plan to write […]

  • Front end interview question Summary – H5 (continuously updated)


    Front end interview question Summary – H5 (continuously updated) 1. Why does HTML5 only need to write <! DOCTYPE HTML>? HTML5 requires DOCTYPE to regulate browser behavior and let browsers run in the way they should;Html4.01 is based on SGML, so you need to reference the DTD to tell the browser the document type used […]

  • Solution to occupied port number (super detailed)


    Problem description java.net.BindException: Address already in use: JVM_Bind Web server failed to start. Port 8899 was already in use. Encountering the above similar problems means that your port number is already in use. We commonly call this problem as port number occupied. Solution win+ROpen the windows computer running window and enter in the text input […]

  • Installing Oracle 11g with CentOS 7


    Graphical installation of Oracle 11g CentOS graphical installation Oracle 11g https://www.cnblogs.com/ogrecn/p/9883355.html Refer to the following links https://oracle-base.com/articles/11g/oracle-db-11gr2-installation-on-fedora-18 1、 View package installation rpm -q binutils compat-libcap1 compat-libstdc++-33 compat-libstdc++-33*.i686 elfutils-libelf-devel gcc gcc-c++ glibc*.i686 glibc glibc-devel glibc-devel*.i686 ksh libgcc*.i686 libgcc libstdc++ libstdc++*.i686 libstdc++-devel libstdc++-devel*.i686 libaio libaio*.i686 libaio-devel libaio-devel*.i686 make sysstat unixODBC unixODBC*.i686 unixODBC-devel unixODBC-devel*.i686 libXp 2、 Install […]

  • Introduction to canvas – make a jigsaw puzzle with canvas


    brief introduction <canvas>Is one of the new elements in HTML5, which allows scripting languages to dynamically render bit images. It was originally introduced by apple for the dashboard of Mac OS X, and later implemented in safiri and Google Chrome.<canvas>Like a magical canvas, you can draw the gorgeous effect you want on it. use<canvas>Element requires […]

  • Greeting card template – greeting card template to attract visitors


    Greeting cards are the best way to tell someone you care about or simply say “thank you”. With these easy to customize greeting card templates, you can easily insert your own images or choose from thousands of free images, icons, fonts, shapes and other graphic assets to create your own eye-catching greeting cards. Visual paradise […]

  • The in-depth learning framework developed by Chinese and American universities may be used for epidemic prevention and control


    Technical editor: mango fruit from Sifu editorial departmentSegmentFault has he reported the official account number: SegmentFault Network science is an academic field that aims to reveal the structure and dynamics behind the network, such as telecommunications, computers, biological and social networks. In recent years, a basic problem that network scientists have been trying to solve […]