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demos

★ 48 Open GitHub ↗

Simple OpenGL and Vulkan graphics demos in C++

// repository documentation

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# About

Graphics demos I made for playing around and learning. The code is (hopefully) clean and self-documented,
most dependencies are included or downloaded automatically for easier building.

There are no complex abstractions aka "engine", however a small library of shared code is still used.
The goal is to keep things easy to understand while taking away some of the boilerplate.

The demos have been tested on Windows. On macOS the OpenGL demos might still work, but have not been
tested properly. Vulkan demos work only on Windows.

Check also https://github.com/0xc0dec/demo-rs - an alternative experiment in Rust.

# Building and running

## Windows

- Install Microsoft Visual Studio, make sure the C++ compiler is included in the installation. The project was last tested with MSVS 2022.
- Install Vulkan SDK. Make sure the `VULKAN_SDK` environment variable is set.
- `cd build`.
- `cmake -A x64 ..`.
- Build the `ALL BUILD` target in MSVS.
- Run demos from the project root, e.g.: `./build/bin/<Debug|Release>/<executable>`.

## macOS

- `cd build`.
- `cmake ..`.
- `make`
- Run demos from the project root, e.g.: `./build/bin/<executable>`.

# Controls

Some demos use first person camera. Use `WASDQE` keys to move around and hold right mouse button to rotate.

# Demos

## [ImGui](/src/imgui) [VK/GL]

Basic [ImGui](https://github.com/ocornut/imgui) integration example.

![Image](https://raw.githubusercontent.com/lexfn/demos/main/src/imgui/screenshot.png)

## [Transform](/src/transform) [GL]

Object transform hierarchies and (first person) camera via reusable [`Transform`](src/common/transform.h) and [`Camera`](src/common/camera.h) classes and a helper [spectator function](src/common/spectator.h).

![Image](https://raw.githubusercontent.com/lexfn/demos/main/src/transform/screenshot.png)

## [Skybox](/src/skybox) [GL]

Skybox rendering on a single quad mesh using a bit of shader magic.

![Image](https://raw.githubusercontent.com/lexfn/demos/main/src/skybox/screenshot.png)

## [TrueType](/src/stb_truetype) [GL]

TrueType font rendering using [stb_truetype](https://github.com/nothings/stb) library.

![Image](https://raw.githubusercontent.com/lexfn/demos/main/src/stb_truetype/screenshot.png)

## To be continued?...

# Dependencies

- stb_truetype
- stb_image
- SDL
- GLEW
- glm
- ImGui
- Vulkan
- OpenGL

demos

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