作者:Mike Baileyhttp://web.engr.oregonstate.edu/~mjb/WebMjb/mjb.html 2.1 Introduction 在shader-based OpenGL以前,几何全于glBegin()和glEnd()之间用glVertex定义,这易于理解。而如今需使用难于理解且容易出错的VBO。如何使用我们更容易的从过去的思
作者:Mike Bailey http://web.engr.oregonstate.edu/~mjb/WebMjb/mjb.html
2.1 Introduction
在shader-based OpenGL以前,几何全于glBegin()和glEnd()之间用glVertex定义,这易于理解。而如今需使用难于理解且容易出错的VBO。如何使用我们更容易的从过去的思路转到现在的思路呢?本章采取直接的方式解决此问题:提供C++的类。这些类使用看起来像glBegin和glEnd的函数创建vertex buffer,并且负责加载,编译,链接和使用shader。并且建议使用naming convention以不污染shader的变量。
2.2 Naming Shader Variables: Introduction
这里定义一些命名规范。由于 可以在7个不同的地方设置GLSL变量,所以需要给变量设置前缀已了解变量从哪里来。如下表
2.3 Naming Shader Variables: Details

Installing MySQL on Linux can be done through the package manager. The specific steps are as follows: 1. On Ubuntu, use apt to update the package list and install the MySQL server; 2. On CentOS, use yum to install the MySQL community version and start the service. After installation, basic configuration needs to be performed, such as setting the root password and creating database and users.

MySQL views are virtual tables generated based on SQL queries. 1. Create a view: Use the CREATEVIEW statement combined with SELECT query. 2. Usage scenarios: simplify complex queries, data abstraction and ensure data consistency. 3. Optimization strategy: simplify underlying queries, use indexes, and consider materialized views.

When creating a database in MySQL, character sets and collation rules should be specified to ensure data accuracy and improve query performance. 1) Use the CREATEDATABASEmy_databaseCHARACTERSETutf8mb4COLLATIONutf8mb4_unicode_ci command to create a database, select the utf8mb4 character set and utf8mb4_unicode_ci collation. 2) utf8mb4 supports more Unicode characters, while utf8mb4_unicode_ci provides case-insensitive comparisons. 3) Ensure that the application layer and database layer use the same character set and collation rules to avoid potential problems.

In MySQL, sorting uses the ORDERBY clause, and ranking uses the RANK(), DENSE_RANK(), and ROW_NUMBER() functions. 1. Sort: Use ORDERBY clause, such as SELECT*FROMemployeesORDERBYsalaryDESC; 2. Ranking: Use window functions, such as SELECTemployee_name, salary, RANK()OVER(ORDERBYsalaryDESC)ASrankFROMemployees; these operations are based on SQL query optimizer and execution engine, and are often used to sort quickly or merge sort, and ranking depends on window function calculation.

To create and call stored procedures in MySQL, follow the following steps: 1. Create stored procedures: Use the CREATEPROCEDURE statement to define stored procedures, including names, parameters, and SQL statements. 2. Compile stored procedures: MySQL compiles stored procedures into executable code and stores them. 3. Call stored procedure: use CALL statement and pass parameters. 4. Execute stored procedures: MySQL executes the SQL statements in it, processes parameters and returns the result.

The MySQL service can be set to automatically start on Windows, Linux, and macOS. 1) On Windows, use the command "scconfigmysqlstart=auto" to configure. 2) On Linux, enable it using "sudosystemctlenablemysql". 3) On macOS, create and load the launchd configuration file to achieve automatic startup.

The methods to view the MySQL table structure include: 1. Use the DESCRIBE command to view column information; 2. Use the SHOWCREATETABLE command to view table creation statements; 3. Use information_schema to query more detailed information. These methods help to quickly understand table structure and improve work efficiency.

Installing MySQL on macOS can be achieved through the following steps: 1. Install Homebrew, using the command /bin/bash-c"$(curl-fsSLhttps://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)". 2. Update Homebrew and use brewupdate. 3. Install MySQL and use brewinstallmysql. 4. Start MySQL service and use brewservicesstartmysql. After installation, you can use mysql-u


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