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NEngine

This is my personal game engine. It is continuos work in progress.

I have started this project to learn internals of game engine.

I have strived to use third party libs as little as possible. Because the main goal is to have a firm understanding on how everything works under the hood.

Well, that was my goal 6 months ago. Right now I have a good grasp of core engine subsystems.

Recently I have switched to Vulkan. I have removed everything and started from scratch. Right now I use SDL2 for platform indpendent window creation and user input processing.

Game engine is written for Windows and utilizes Vulkan.

List of third party libs:

  1. ImGui
  2. mikktspace
  3. stb_image
  4. SDL2
  5. tinyobjloader
  6. glm

How to build

Windows

Install Vulkan SDK.

Open CMake project in Visual Studio and build nengine executable.

Linux

Install Vulkan SDK, SDL2.

CMake will assume that it is possible to find Vulkan and SDL2 with find_package.

Execute:

cmake -S . -B build-debug -DCMAKE_BUILD_TYPE=Debug
cmake --build build-debug

There is an old brach dx11 that is not supported by me. It uses DirecX 11 and contains enough facilities to start a simple 3D game development.

From now on only vulkan branch will be supported.

Roadmap

Utility

  1. Split execution into several threads. Probably for now it is enough to have two threads (Game and Render) and switch all I/O to async.
  2. Save scene to some textual file and parse it on load to restore scene.
  3. Add in-house format for meshes.

Renderer

  1. Add PBR for BasePass.
  2. Add frustum culling.
  3. Add shadows.
  4. Add fog.
  5. Add bloom.
  6. Add particles.

Vulkan

Find out how those concepts work:

  • Push constants
  • Instanced rendering
  • Dynamic uniforms
  • Separate images and sampler descriptors
  • Pipeline cache
  • Multi-threaded command buffer generation
  • Multiple subpasses
  • Compute shaders

Editor

  1. Support scene saving/loading.
  2. Support moving of the objects in the scene via CLI or GUI.
  3. Highlight object selected in the Editor.

Sandbox

  1. Add basic scene that contains a pawn, few characters, few trees, few rocks or anything else. It should be possible to walk on the scene.