Areas of Interest during Exploration Phase

General

Selection of Open Source License
Project websites
Community mailing list/forum
Social media
Testing frameworks/approach/projects - SceneGraphTestBed
Build tools
- CMake
- xmake

Vulkan

Setup and Configuration
State and geometry data
- Creation of buffers
- Uniforms
- Textures
- Arrays
- Primitives
Shaders
- tools for offline and runtime .glsl -> SPIR-V
- runtime shader compilation options
Presentation of graphics
Threading
Synchronization

C++

Features and availability of C++ 11, 14 and 17
Threading
Containers
Algorithms
Memory management
Templates
Lambda
Style Guide

Core class

Memory
- ref_ptr
- Object
- Backbone data - local data used during standard traversals/operations
- Extra - data used rarely : parents, observers, user data
Introspection
- Wrappers
- Serialization
- I/O
Threading
- C++ now has threading but no Affinity
- Thread pools

Scene Graph

Scope out the minimal set of Node classes required
- NullNode to avoiding the need for if (!node) doSomething
- Fixed size vs variable size Containers in Groups etc.
- Level of Detail
- CullNode (shift bounding volumes from all nodes to specialized node?)
- MaskNode (shift node mask checks from all nodes to specialized node?) *Cameras
Traversal
- Visitor Pattern
- Possibilities for inlining vs virtual functions
- RenderTraversal
- ComputeTraversal
- UpdateTraversal
- EventTraversal
- Multi-pass and Multi-stage rendering control
State
- Buffers
- Uniforms
- Textures
- Arrays
- Primitives
- Shaders
- Shader composition
Threading
- Traversals
- Database paging

Viewer

Window creation
Vulkan initialization and synchronization
Presentation of graphics, swap management
Threading
Single view vs multi view

Interoperability

Converting scene graph data from OpenSceneGraph data to leverages loaders
Rendering Vulkan graphics within a OpenGL graphics context