ROADMAP.md · vulkan3D/VulkanSceneGraph

## Roadmap

Follows are initial plans for future releases and then going back into time to previously completed milestones.

### Stable Release Support and Functionality build-out Phase, 2023 onwards (underway)
**Goal: Maintain the VulkanSceneGraph-1.0.x release series and work towards the next stable release VulkanSceneGraph-1.2 - expanding the VulkanSceneGraph and companion projects feature sets to address a wider range of uses**

Discussion of new features:[New Feature Development RoadMap for future VulkanSceneGraph-1.2 release and beyond](https://github.com/vsg-dev/VulkanSceneGraph/discussions/600)

#### Completed tasks:
* [VulkanSceneGraph-1.0.1](https://github.com/vsg-dev/VulkanSceneGraph/releases/tag/VulkanSceneGraph-1.0.1) maintenance release
* [VulkanSceneGraph-1.0.2](https://github.com/vsg-dev/VulkanSceneGraph/releases/tag/VulkanSceneGraph-1.0.2) maintenance release
* [VulkanSceneGraph-1.0.3](https://github.com/vsg-dev/VulkanSceneGraph/releases/tag/VulkanSceneGraph-1.0.3) maintenance release
* Billboard support in vsg::Text and standard shaders and geometry - part of 1.0.3
* Rewrite MeshShader to use Khronos Mesh Shaders functions.

#### Current development tasks:
* vsgQt support for Wayland

#### Future development tasks:

* Support for shadows and environment maps in the Phong and PBR ShaderSets, and helper functions/classes for creating scene graphs that render shadow maps.
* Character animation/skinning in standard.vert shaders used by Phong and ShaderSets?
* Rewrite RayTracing classes to modernize them and bring them more inline with other core VSG classes.
* Acceleration structures for CPU based geometry operations i.e. KdTree or similar to speed up intersection testing etc.
* Multiview extension implementation
* Noise function, CPU or GPU or both.
* vsgQt multi window support
* Support for integration with OpenGL/OSG applications via [EXT\_external\_object](https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_external_objects.txt) & [VK\_KHR\_external\_memory](https://www.khronos.org/registry/vulkan/specs/1.1-extensions/man/html/VK_KHR_external_memory.html#versions-1.1-promotions)

---

### Core Development & Release Phase, 2019-2022 (completed)
**Goal: Create the final class interfaces and implementation**

Using the prototyping work as a guide implement the final scene graph library with the aim of creating a solid interface and implementation.

#### Completed tasks:
* Development of final VSG Library.
* Support for multi-threaded database paging.
* Support for multi-threaded viewer, cull and dispatch traversals.
* Support for multi-pass rendering.
* Support for large scale whole world databases, with double support for scene graph transforms.
* Development of add on libraries that provide:
    * Support for major image formats.
    * Support for major 3D model formats, including FBX, glTF.
    * Support for PBR shaders.
    * Support for Text rendering.
* Development of test suite of programs and data.
* Support for RTX Mesh shaders and ray tracing.
* Scene graph level multi-bin support with bin sorting.
* Support for Khronos ray tracing.
* Memory allocator with support for grouping associated types
* Positional state support to enable easier support of lighting, shadows, texture projection.
* Matrix decomposition
* Port to iOS
* Unified state composer, shader set and cache
* Update vsgXchange::Assimp to use the new state composer/shader set.
* Support for wide and standard strings in vsg::Path.
* Utilize vkEnumerateInstanceVersion
* Update vsgImGui to latest
* Improved support for dynamic scene graphs and dynamic views, dynamic descriptor pool reallocation
* Refinement of API and implementation
* Build relationships with application developers and involve them in testing
* Create tutorial and example programs to illustrate how to use VSG
* Test, debug, refine and release 1.0.0!
* Update vsgXchange::OSG to use the new state composer/shader set.
* Rewrite vsgQt handling of keyboard mapping
* VulkanSceneGraph-1.0.0 stable release

---
### Prototype Phase, October-December 2018 (completed)
**Goal : Rapid prototyping of main classes, library and test applications to establish how the scene graph API will broadly look and work.**

Prototype Phase Materials:

* [Prototype Phase Workplan](docs/PrototypePhase/Workplan.md)
* [Prototype Phase Report](docs/PrototypePhase/PrototypePhaseReport.md)
---
### Exploration Phase, June-September 2018 (completed)
**Goal : Establish which technologies and broad techniques to use**

Learn and experiment with Vulkan, modern C++, and possible 3rd party dependencies.
Experimenting with different approaches to object/scene graph design and implementation. Exploration Phase Materials :

* [Principles and Philosophy](docs/Design/DesignPrinciplesAndPhilosophy.md)
* [High Level Design Decisions](docs/Design/HighLevelDesignDecisions.md)
* [Exploration Phase Report](docs/ExplorationPhase/VulkanSceneGraphExplorationPhaseReport.md)
* [Areas of Interest](docs/ExplorationPhase/AreasOfInterest.md)
* [3rd Party Resources](docs/ExplorationPhase/3rdPartyResources.md)

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