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 avoid 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 VSG leverages loaders
• Rendering Vulkan graphics within an OpenGL graphics context