I3T

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Code style ​

Please follow the rules below when writing code. You can use the clang-format tool to format the code and clang-tidy to check the code.

C++ ​

cpp
/**
 * \file
 * \brief
 * \author Name Surname <email>
 * \copyright Copyright (C) 2016-2023 I3T team, Department of Computer Graphics
 * and Interaction, FEE, Czech Technical University in Prague, Czech Republic
 *
 * This file is part of I3T - An Interactive Tool for Teaching Transformations
 * http://www.i3t-tool.org
 *
 * GNU General Public License v3.0 (see LICENSE.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
 */
#pragma once

#include <string>

const int g_val = 0;

class EditBox
{
public:
  void setName(const std::string& name)
  {
    m_boxName = name;
  }

private:
  std::string m_boxName;
};
  • Never use using namespace std;. It can cause conflicts.
  • Never use backslashes in paths path\to\file, prefer POSIX style path/to/file (Windows can handle these paths).

Code structure ​

  • Static variables are declared at the beginning of the .cpp file.
  • Header files are included in groups separated by an empty line, in the following order - if possible:
    • 1. header file associated with the given .cpp file,
    • 2. STL libraries,
    • 3. external libraries of the project,
    • 4. internal header files.

Code formatting ​

Code formatting rules are defined in the .clang-format file. It is not possible for each piece of code to be indented by a different number of spaces, etc. IDE can load formatting rules and warn about their violation.

In general, the form of our code is based on the Microsoft code style. I would like to point out in particular writing the opening bracket of the code block on a new line (see example).

Naming ​

  • All classes, structures and enumerations ClassName, StructName are named in camel-case style with an initial capital letter.
  • All variables and functions myVariable are also named in camel-case style, but with a lowercase initial letter.
  • All C++ files FileUtils.[cpp/h] are named the same as classes and structures.
  • Global variables with prefix g_.
  • Member variables the same as variables, but with prefix m_. For purely data structures (without member functions) is recommended to use the struct keyword instead of class and omit the prefix m_.
  • Member static variables with prefix s_.

How to document code ​

The following file contains useful examples and tricks for Doxygen.

Groups ​

It is often useful to group member functions of classes that have something in common. Doxygen allows this using tags.

cpp
///@{
    ...
///@}

Note that you cannot nest a group into a group.

Link to Doxygen