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APG

A simple framework for writing primarily 2D games using Modern C++ (C++14), OpenGL, SDL2 and Tiled maps.

The design is heavily inspired by LibGDX.

What's Included

  • COMING SOON: emscripten support (WASM)
  • An easy entry-point with clearly defined functions to implement to make your own cross platform game.
  • A SpriteBatch class similar to the one in LibGDX which aims to minimise draw calls for 2D sprites.
  • An SDL2 input manager for the keyboard supporting "isPressed" and "isJustPressed" as required.
  • An SDL2_mixer audio manager for playing a channel of music and multiple channels of sound effects.
  • SDL2_net/Native Socket wrappers for networking including a modified version of ByteBufferCpp for handling data.
  • The ability to compile without SDL/GL at all, allowing you to use the rest of the library freely and reduce dependencies/library size if you don't need some components (ideal for, for example, servers which share some data structures with the client).
  • C++14 unique_ptr wrappers around common SDL2 structs (SDL_Surface, SDL_Window, etc) which let you stop having to worry about cleanup.

How To Use

Cloning

Most of APG's dependencies are vendored using git submodules, so just cloning the repository won't be enough to get all the code. You can do something like the following:

# Clone APG as usual, and cd into the directory
g submodule update --init --recursive  # this will fetch all the dependencies at the correct commit

Dependencies for Build

Generally, you'll need a C++ compiler, zlib, OpenGL and the SDL2 libraries (SDL2, SDL2_image, SDL2_mixer, SDL2_net, SDL2_ttf) installed and nothing else.

WASM

Install emscripten as shown in the Wiki.

Activate emscripten (source ./emsdk_env.sh) then run:

python $EMSCRIPTEN/embuilder.py build ALL

to build SDL2 and OpenGL.

Don't forget to use emcmake cmake .. instead of the regular cmake command.

macOS

You'll need Homebrew installed along with git (likely through the XCode command line tools).

brew install cmake sdl2 sdl2_gfx sdl2_image sdl2_mixer sdl2_net sdl2_ttf glew

Linux Deb-based (Debian, Ubuntu, etc.)

You should be able to install the dependencies you need through your package manager.

sudo apt install git cmake  # basic build dependencies; you'll also need a compiler (something like build-essential)
# Now install library dependencies which are not vendored
sudo apt install libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsdl2-net-dev libsdl2-ttf-dev libglew-dev zlib1g-dev

Windows

Coming soon!

Building

Clone the repository and navigate to the folder, then:

mkdir build && cd build
cmake ..
make -jN # where N is the number of cores you have

If you don't care about the tests you can use cmake -DEXCLUDE_TESTS=ON. By default, all tests are built as well as the libraries.

Usage Notes - Logging

The library depends on easylogging++ which is included by source. To use the library, you simply need to: #include "easylogging++.h" in your files. Important: In your file which contains your main function you must include the line INITIALIZE_EASYLOGGINGPP directly after you include the function.

It's also recommended that you use the function START_EASYLOGGINGPP(argc, argv); on your first line of your main function.

For more information on easylogging++, visit the GitHub repository.