A game engine written in Beeflang with Vulkan and DX12 rendering, a scene editor, and a CSS-styled UI framework. Built for making 3D games.
Renderer -- Forward PBR with shadows, particles, decals, sprites, skeletal animation, IBL, reflection probes, and post-processing (SSAO, bloom, TAA, FXAA, tone mapping). Runs on Vulkan 1.3 or DX12.
Scene System -- Entity-component architecture with hierarchical transforms, prefab spawning, and scene serialization. Physics (Jolt), navigation (Recast/Detour), and audio (SDL3 with 3D spatialization, bus mixing, DSP effects) are built in.
Editor -- Scene hierarchy, 3D viewport with transform gizmos, inspector with auto-generated property editors, asset browser with import pipeline, undo/redo, GPU entity picking, multi-window docking.
UI Framework -- Build game menus, HUDs, and tools with declarative XML markup (.sml) and CSS-inspired stylesheets (.sss). Flex, dock, grid, and flow layouts. Buttons, sliders, lists, tabs, text input, and more. Gamepad navigation works out of the box. World-space billboard UI for health bars and labels attached to 3D objects.
Editor Toolkit -- Dockable panels, property grids, menu bars, split views, color pickers, node graph canvas, and draggable tree views for building editor tools.
Sedulous is under active development. Previous iterations have shipped games; this version is a significant evolution with a game currently in progress.
- Beeflang Nightly (BeefBuild or Beef IDE)
- Vulkan SDK (for shader compilation)
- GPU supporting Vulkan 1.3 or DX12
cd Code
BeefBuild -workspace=. -project=EngineSandbox # Game sandbox
BeefBuild -workspace=. -project=Sedulous.Editor.App # Editor
BeefBuild -workspace=. -project=UISandbox # UI demo
The first run compiles all shaders on startup, which takes a while. To cache them for faster subsequent runs, set EnableShaderCache = true in Code/Engine/Sedulous.Engine.App/src/EngineAppSettings.bf. If you modify shaders, delete the cache directory to force recompilation.
EngineSandbox is the main testbed -- PBR rendering, shadows, skinned meshes, particles, sprites, decals, physics, audio, navigation, and world-space UI all in one scene.
Showcase demonstrates the asset import pipeline with a stylized nature scene built from glTF models.
UISandbox shows every UI control, layout, and styling feature -- buttons, sliders, checkboxes, lists, trees, tabs, drag-and-drop, docking, context menus, and .sml markup loading.
Sedulous is built in layers. Each layer depends only on the layers below it.
Applications -- Games, Editor, Sandboxes
Engine -- Scene, Entities, Components, Transforms, Serialization
Subsystems: Scene, Input, Physics, Animation, Audio, Navigation, Render, UI
Renderer -- RenderContext, Pipeline, PostProcessing, Shadows, Particles, IBL
Foundation -- RHI, Shell, VG, Fonts, UI, Resources, Jobs, Shaders, Math
Foundation libraries work standalone -- use them in tools and tests without the engine. Renderer is scene-independent; it takes flat render data and draws it. Engine provides the scene model and subsystems. Applications own the window and decide what to render.
Code/
Foundation/ -- Core libraries (RHI, Shell, VG, UI, Physics, Audio, etc.)
Engine/ -- Engine.Core (scene model) + subsystems
Editor/ -- Editor core + application
Samples/ -- EngineSandbox, UISandbox, Showcase, RHI samples
Tools/ -- Asset importers and utilities
Dependencies/ -- Third-party bindings
Assets/ -- Shaders, fonts, GUI themes, sample assets
Documentation/
Manual/ -- Getting started, scene system, rendering, input, audio, etc.
Roadmap/ -- Feature plans for renderer, editor, engine, UI
UI.md -- UI framework reference (controls, styling, markup, gamepad)
- Manual -- Getting started, tutorials, and guides
- UI Framework Reference -- Controls, .sml markup, .sss styling, gamepad navigation
Developed and tested on Windows. The engine is designed to be cross-platform, but other platforms would need dependency builds and RHI bootstrapping work.
Built on these Beeflang bindings:
- Bulkan -- Vulkan API
- Win32-Beef -- DirectX 12 / Win32 API
- SDL3-Beef -- Window, input, audio
- joltc-Beef -- Jolt Physics
- recastnavigation-Beef -- NavMesh / pathfinding
- Dxc-Beef -- HLSL shader compilation
- stb_image-Beef, stb_truetype-Beef -- Image loading, font rasterization
- cgltf-Beef -- glTF model loading
- ufbx-Beef -- FBX/OBJ model loading
See CONTRIBUTING.md for setup and conventions. Help is welcome with testing, editor tooling, cross-platform support, and roadmap items.
Join the Discord for discussion and support.
Sedulous draws inspiration from ezEngine, LumixEngine, and Traktor.