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Kaliber

A simple, cross-platform 2D game engine with OpenGL and Vulkan renderers. Supports Linux, Windows and Android platforms. This is a personal hobby project. I've published a little game on Google Play based on this engine. Full game code and assets are included in this repository.

Pre-requisites:

GN build system is required for all platforms except Android:
https://gn.googlesource.com/gn/

Build Tools is required to build for Windows. if you prefer, you can install Visual Studio which includes the Build Tools.

Linux is the supported host platform to build for Android. Gradle, Android SDK and NDK are required. If you prefer, you can install Android Studio which includes all the requirements.

Building from the command-line:

All platforms except Android:

Setup:

gn gen out/release
gn gen --args='is_debug=true' out/debug

Building and running:

ninja -C out/debug
./out/debug/hello_world
./out/debug/demo

Building and debugging from VS Code:

Select "Debug demo - [platform]" from the "Run and Debug" drop down.
Press F5.

Android:

cd build/android
./gradlew :app:installDebug

Third-party libraries:

glew, jsoncpp, minimp3, oboe, stb, texture-compressor, minizip, glslang, spirv-reflect, vma, vulkan-sdk, volk

Hello World example:

Shows a smoothly rotating "Hello Wolrd!".

class HelloWorld final : public eng::Game {
 public:
  ~HelloWorld() final = default;

  bool Initialize() final {
    eng::Engine::Get().SetImageSource(
        "hello_world_image",
        std::bind(&eng::Engine::Print, &eng::Engine::Get(), "Hello World!",
                  base::Vector4f(1, 1, 1, 0)));

    hello_world_.Create("hello_world_image").SetVisible(true);
    animator_.Attach(&hello_world_);
    animator_.SetRotation(base::PI2f, 3,
                          std::bind(base::SmootherStep, std::placeholders::_1));
    animator_.Play(eng::Animator::kRotation, true);
    return true;
  }

 private:
  eng::ImageQuad hello_world_;
  eng::Animator animator_;
};

GAME_FACTORIES{GAME_CLASS(HelloWorld)};

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