Article Introduction：When we download some light effect materials from the Internet, we often encounter pictures with black backgrounds, which are generally used for special effects in games. Normally, color filtering and other methods are used to extract such materials, but you will find that the color filtering mode will cause problems such as brightening of the picture and color aberration. And the general cutout method often leaves black, so what is the solution?

2018-08-28 comment 0  13324

Article Introduction：1. Prepare materials: half butterfly picture, preferably in PNG or GIF format with a transparent background. 2. Use a circle to construct a parallelogram ① Open the geometric sketchpad mathematical geometry drawing software, use the circle tool to draw a circle O, OA is its radius. ② Mark point O as the center of rotation. Rotate point A 90° around point O to get point B. Pick any point C on the circle between A and B, and select ⊙O, point C, and point B in order to construct arc CB. ③ Construct point D on arc CB and create an animation button for point D on arc CB. ④ Mark the vector OD and translate the point A to E accordingly to obtain the parallelogram OAED. 3. Drag the prepared half butterfly picture to the geometric drawing board, select it, and copy it. 4. Select the three points D, O, and E in turn and execute [Edit] → [Paste]

2024-04-17 comment 0  945

Article Introduction：1. Prepare materials: half butterfly picture, preferably in PNG or GIF format with a transparent background; (Photoshop may be used) 2. Use a circle to construct a parallelogram ① Open the geometric sketchpad mathematical geometry drawing software and use the circle tool Draw a circle O, OA is its radius. ② Mark point O as the rotation center. Rotate point A 90° around point O to get point B. Pick any point C on the circle between A and B, and select ⊙O, point C, and point B in order to construct arc CB. ③ Construct point D on arc CB and create an animation button for point D on arc CB. ④ Mark the vector OD and translate the point A to E accordingly to obtain the parallelogram OAED. 3. Drag the prepared half butterfly picture to the geometric drawing board, select it, and copy it. 4. Select D, O in turn

2024-04-17 comment 0  674

Article Introduction：Among computer operating systems, WIN7 system is a very classic computer operating system, so how to install win7 system? The editor below will introduce in detail how to install the win7 system on your computer. 1. First download the Xiaoyu system and reinstall the system software on your desktop computer. 2. Select the win7 system and click "Install this system". 3. Then start downloading the image of the win7 system. 4. After downloading, deploy the environment, and then click Restart Now after completion. 5. After restarting the computer, the Windows Manager page will appear. We choose the second one. 6. Return to the computer pe interface to continue the installation. 7. After completion, restart the computer. 8. Finally come to the desktop and the system installation is completed. One-click installation of win7 system

2023-07-16 comment 0  1208

Article Introduction：:This article mainly introduces php-insertion sort. Students who are interested in PHP tutorials can refer to it.

2016-08-08 comment 0  1063

Article Introduction：charles captures requests in eclipse

2016-12-02 comment 0  1695

Article Introduction：Illustrated method to find the path of the PHP configuration file php.ini. Graphical method to find the path of the PHP configuration file php.ini. Recently, some bloggers asked in which directory php.ini exists? Or why does it not take effect after modifying php.ini? Based on the above two questions,

2016-07-13 comment 0  811

Article Introduction：IT House reported on July 14 that Huawei recently released new commercial AI storage products "OceanStorA310 deep learning data lake storage" and "FusionCubeA3000 training/pushing hyper-converged all-in-one machine". Officials said that "these two products can train basic AI models." , industry model training, and segmented scenario model training and inference provide new momentum." ▲ Picture source Huawei IT Home compiled and summarized: OceanStorA310 deep learning data lake storage is mainly oriented to basic/industry large model data lake scenarios to achieve data regression from Massive data management in the entire AI process from collection and preprocessing to model training and inference application. Officially stated that OceanStorA310 single frame 5U supports the industry’s highest 400GB/s

2023-07-16 comment 0  1541

Article Introduction：The difference between the exec function and the shell_exec function in PHP, execshell_exec. The difference between the exec function and the shell_exec function in PHP. Both execshell_exec functions execute Linux command functions. The difference is that the return results are different. exec can only get the last line number.

2016-07-13 comment 0  1059

Article Introduction：Nginx server combines Nginx and tomcat to access jsp

2016-12-02 comment 0  1810

Article Introduction：:This article mainly introduces the PHP function container ing..., students who are interested in PHP tutorials can refer to it.

2016-08-08 comment 0  1100

Article Introduction：Interface usage of PHP object-oriented programming, PHP object-oriented programming. Interface usage in PHP object-oriented programming, PHP object-oriented programming interface is a very important concept in PHP object-oriented programming. This article explains in more detail in the form of examples

2016-07-13 comment 0  984

Article Introduction：PHP object-oriented programming and other constant usage examples, sed usage examples. Examples of constant usage in PHP object-oriented programming, examples of sed usage. Class constants are a very important concept in PHP object-oriented programming. A firm grasp of class constants will help further improve

2016-07-13 comment 0  1020

Article Introduction：Java Tutorial—The Difference Between Int and Integer

2016-12-02 comment 0  1991

Article Introduction：Here is a JAVASCRIPT client solution for obtaining URLs with QUESTRING parameters, which is equivalent to ASP's request.querystring and PHP's $_GET

2017-04-24 comment 0  4137

Article Introduction：JavaWeb learning summary_Servlet development

2016-12-02 comment 0  1943

Article Introduction：Examples explain PHP object-oriented polymorphism, examples explain object-oriented. Examples explain object-oriented polymorphism in PHP. Examples explain object-oriented polymorphism. What is polymorphism? Polymorphism is the third feature of object-oriented languages ​​after database abstraction and inheritance. Polymorphism is many

2016-07-13 comment 0  908

Article Introduction：This article mainly introduces the document structure of HTML5 and the complete analysis of new tags. Friends in need can refer to it.

2017-04-24 comment 0  2385

Article Introduction：Learn the YII2 framework from scratch (5) Use of the rapid code generation tool Gii, yii2gii. Learn the YII2 framework from scratch (5) Use of the rapid code generation tool Gii, yii2gii The reason why the Yii2 framework is called a framework for efficient and rapid development is because there is a magical tool

2016-07-13 comment 0  1438

Article Introduction：Reinstalling the system is a very common solution when there is a problem with the computer. However, when some friends reinstalled the win7 system, they found that there was no sound after plugging in the headphones. So what should I do if there is no sound after reinstalling the win7 computer system? Let’s take a look. 1. Right-click [Computer] and click [Properties]. 2. Open the computer's system properties interface and find the [Control Panel Home] function on the left and click to open the control panel. 3. Next, find the [Hardware and Sound] function in the control panel and click it. 4. Then find and click to open the [Sound] settings on the right side of the Hardware and Sound interface. 5. Click [Play] in the sound settings, and check if there is a reminder [Audio device not installed] below. If so, right-click the blank part, and then click [Show Disabled].

2023-07-16 comment 0  2378