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Acid is an open-source, cross-platform game engine written in modern C++17 and structured to be fast, simple, and extremely modular.

Vulkan is the sole graphics API, Vulkan can be accessed in apps with the provided Acid rendering pipeline. Metal is supported through MoltenVK; eventually, DirectX will be supported in a similar way.

This project is being worked on part-time by a single developer, this is under heavy development, expect bugs, API changes, and plenty of missing features.



Code Snippets

// Imports a 2D texture using nearest filtering.
auto guiBlack{Image2d::Create("Guis/Black.png", VK_FILTER_NEAREST)};

// Imports a 3D cubemap (face names defined in Cubemap.cpp).
auto skyboxSnowy{ImageCube::Create("Objects/SkyboxSnowy", ".png")};

// Imports a OBJ model.
auto dragon{ModelObj::Create("Objects/Testing/ModelDragon.obj")};

// Creates a sphere model with 20 latitude and longitude bands with a radius of 1.
auto sphere{ModelSphere::Create(20, 20, 1.0f)};

// Plays a 3D sound (sound buffer resource internally managed), at (10, 0, 0), at half volume.
auto jump{Sound("Sounds/Jump.ogg", {10.0f * Vector3f::Right}, Audio::Type::Effect, false, true, 0.5f)};

// Loads a entity from a prefab file.
auto playerObject{GetStructure()->CreateEntity({}, "Objects/Player/Player.json")};

// Creates a entity.
auto sphere{GetStructure()->CreateEntity({Vector3f{6.7f, 6.7f, -8.0f}, Vector3f{0.0f, Maths::Radians(180.0f), 0.0f}, 3.0f})};
sphere->AddComponent<Mesh>(ShapeSphere::Create(20, 20, 1.0f)); // This will used the sphere buffers created earlier.
sphere->AddComponent<ShapeSphere>(); // Multiple shape components can be added to a single rigidbody.
sphere->AddComponent<Rigidbody>(2.0f); // Will be created weighing 2 units, this will find all shapes attached.
sphere->AddComponent<MaterialDefault>(Colour::White, Texture::Create("Objects/Testing/Albedo.png"), 0.0f, 0.5f,
    Texture::Create("Objects/Testing/Material.png"), Texture::Create("Objects/Testing/Normal.png"));
sphere->AddComponent<MeshRender>(); // A mesh renderer will render the material attached.

// Vector maths.
Vector2f a{3.0f, -7.2f};
Vector2f b{-1.74f, 15.4f};
Vector2f c{a * b};
// Distance between the two points.
float dist{a.Distance(b)};
// Right shift of the x and y bits by 1.
Vector2i rshift = Vector2i{5, 9} >> 1;

// Split a string by spaces.
std::string stringSource{"Hello world!"};
std::vector<std::string> stringSplit{String::Split(stringSource, ' ')};

// Will run a lambda on window resize, and when this object is deleted the lamdba is removed.
Window::Get()->OnSize().Add([](Vector2ui size)
	Log::Out("Hello world: %s\n", size.ToString());

// A value container that calls a delegate on value assignments.
DelegateValue<Vector3f> da;
da.Add([](Vector3f value)
	Log::Out("New Value: %s\n", value.ToString());
da = {10.0f, -4.11f, 99.991f};

// Time addition.
Time dateTime{4h + 2min + 11s + 9ms + 1us + 4ns};

// Calls the function once after 150 milliseconds.
Timers::Get()->Once(150ms, []()
	Log::Out("Timer Hello World!\n");
// Calls the function every 4 seconds. 
Timers::Get()->Every(4s, []()
	Log::Out("Timer Every Tick\n");
// Calls the funcion every 7 seconds 3 times.
Timers::Get()->Repeat(7s, 3, []()
	static uint32_t i{};
	Log::Out("Timer Repeat Tick #%i\n", i);








All platforms depend on CMake, 3.11 or higher, to generate IDE/make files.

Cmake options (default ON):

If you installed Acid using only system libs, then find_package(Acid) will work from Cmake. Versioning is also supported.
When using find_package(Acid) the imported target Acid::Acid will be created.
The ACID_RESOURCES_DIR variable will also be available, which will point to the on-disk location of Acid/Resources (if installed).

Vulkan SDK, OpenAL, and OpenAL SDK are required to develop and run Acid.

Make sure you have environment variables VULKAN_SDK and OPENALDIR set to the paths you have Vulkan and OpenAL installed into.

Ensure you are using a compiler with full C++17 support, on Windows it is recommended that you use MSVC or MinGW w64.

If using Visual Studio it must be 2015 or later. Use the Visual Studio installer and select both “Desktop development with C++” and “Windows SDK” if they are not already installed. Then on Visual Studio Acid can be opened as a CMake workspace folder.

On Linux Acid requires xorg-dev, libopenal1, and libvulkan1 to be installed. Read about how to setup Vulkan on Linux so a Vulkan SDK is found.

Setup on MacOS is similar to the setup on Linux, a compiler that supports C++17 is required, such as XCode 10.0.


You can contribute to Acid in any way you want, we are always looking for help. You can learn about Acids code style from the