Custom Engine Blightspire

The Engine
Graphics pipeline
GBuffer Layout
GPU Driven Rendering
Draw Generation
Animations
Post-processing

In my third-year at BUas I had the opportunity of working on a custom tech project for the entire school year (4x 8 weeks). The brief for this project was to create a game for the Steam Deck, that had a hard requirement of having to run at 60fps. Making use of Vulkan as our graphics API, we created all the necessary parts for an engine. We aim to create a first-person shooter, and our engine design tries to reflect this.

My responsibility on the project was both graphics programmer and programmer lead. This meant I was mostly in contact with the rendering back-end/architecture, and worked on the main optimizations happening on the GPU. As programmer lead, I helped the team come to conclusions and make sure communication was happening between everyone.

The Engine

Libraries

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Cereal for serialization and deserialization
EnTT for ECS architecture
Fast GLTF for glTF model format parsing
FMod for audio integration
FreeType for ImGui font support
GLM for math related operations
ImGui for editor interfacing
- ImPlot for displaying graphs
Jolt Physics for collisions, hit testing, and rigidbodies
Magic Enum for reflecting on enum classes
SDL3 for cross-platform windowing, and inputs
SpdLog for debug logging
STB for image loading
Steamworks for interfacing with the Steam API
Tracy Profiler for integrating profiling
Visit Struct for reflecting on structs
Vulkan for interfacing with Vulkan
- SPIRV Reflect for reflecting spir-v binary format
- Vulkan Headers for using a modern C++ interface with Vulkan
- Vulkan Memory Allocator for abstracting memory allocations
Wren Language for our scripting language
- WrenBind17 for C++ 17 support with wren

Feature list

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Renderer
- GPU-Driven rendering
  - Frustum culling
  - Two-pass HZB occlusion culling
- Deferred renderer
- PBR lighting model
- Image based lighting
- Shadow Mapping
- Skeletal animations (skinning)
- FXAA
- SSAO
- Bloom
- Tonemapping (several options)
- Frame graph
Physics
- Colliders
  - Convex Hulls
  - Mesh
  - Primitives
- Ray casting
- Player controller
Scripting
- Wren scripting language
- Bindings from different modules in the engine
Assets
- glTF model loading
  - Texture, mesh, hierarchy, animation parsing
Pathfinding
- A* navigation
- Navmesh support
Audio
- FMod integration
- 3D audio
UI
- Font atlas
- Buttons
- Images
- Navigation
- Progress bars
ECS architecture
- EnTT integration
Profiling
- Tracy integration
- GPU profiling
- Automatic profiling per ECS system
- Automatic profiling per engine module

Graphics pipeline

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Custom Engine Blightspire

Contents

The Engine

Graphics pipeline

GBuffer Layout

GPU Driven Rendering

Draw Generation

Animations

Post-processing