*Added FPrimitiveSceneDesc, a structure you can initialize with a description of the primitive you're trying to Add/Remove/Update in the FScene
-Added entry points in FSceneInterface to do those operations, legacy entry points using UPrimitiveComponent are untouched.
-The code that executes those operations in FScene has been refactored to be shared between the two entry points as much as possible to lessen the additional maintenance burden.
*Added FPrimitiveSceneProxyDesc/FStaticMeshSceneProxyDesc/FInstancedStaticMeshSceneProxyDesc, structures that hold all the necessary information to create a FPrimitiveSceneProxy/FStaticMeshSceneProxy/FInstancedStaticMeshSceneProxy without depending on AActors or UPrimitiveComponent.
-Those structures can be initialized by constructing them with the corresponding UPrimitiveComponents, or by constructing their default versions and initializing the desired fields.
-Creation code for FPrimitiveSceneProxy/FStaticMeshSceneProxy/FInstancedStaticMeshSceneProxy now takes all its info from those desc structures. They are created on demand during scene proxy creation for UPrimitiveComponents. This means no additional memory, and all serialized assets & blueprints are unaffected.
*Added IPrimitiveComponent/IStaticMeshComponent interfaces
-These allow for some editor-only interactions occurring during proxy creation, and serve as a common interface for some code that expected to manipulate UPrimitiveComponent/UStaticMeshComponents. For example FObjectCacheEventSink / FObjectCacheContext now uses those interfaces to associate the resources between various users and interactions like proxy recreation on shader/mesh changes occur through those interfaces.
* Misc
-Moved scene primitive related member variables into a new structure (FPrimitiveSceneInfoData) to facilitate code sharing and implementations of various related functionality (like SetLastRenderTime).
-Changed ObjectCacheContext to store associations between resources and components using component interfaces so that other systems creating proxies have the proper behaviors when resource changes require proxy recreation.
-Added natvis support so that component interfaces to UPrimitiveComponent/UStaticMeshComponent display the component ptr for easier debugging.
-Changed FMotionVectorSimulation to use UObject* instead of UPrimitiveComponent*, it was already using this internally
-Templatized some nanite helpers like ShouldCreateNaniteProxy & AuditMaterials since we need to use them from both UPrimitiveComponent & FPrimitiveSceneProxyDesc and it'll help make sure we keep them in sync.
#jira UE-191990
#rb Zach.Bethel, Ola.Olsson, Jason.Nadro, Krzysztof.Narkowicz
[CL 27200716 by dominic couture in ue5-main branch]
Platforms that do support uniform buffer objects can now provide batched primitive data through UBO. There is a limit UBO range that can be accessed in shaders, so we group instances into batches that fit into this limit. Switch uses 64KB views, other platfroms16KB views. For each primitive we allocate 512Bytes and 256Bytes for instance. Mobile platforms that do not support UBO will use a desktop version of GPUScene.
There are a few things that still missing: Dynamic mesh passes, static lighting
#rb ola.olsson, benjamin.rouveyrol
[CL 26354848 by marc audy in ue5-main branch]
- RHICreate{Vertex, Index, Structured}Buffer
- RHICreate{ShaderResource, UnorderedAccess}View
- RHIUpdateUniformBuffer
- Various initialization / locking methods for helper buffer types in RHIUtilities.h
The goal is to continue to force resource creation through command lists to avoid surprises with moving things off the render thread.
#rb christopher.waters
[CL 26183242 by zach bethel in ue5-main branch]
- Move primitive data stride to SceneDefinitions header so we don't have to change it in 3 places in code.
- Move FPrimitiveSceneShaderData to its own header to (eventually) eliminate dependencies that adversely affect compile time.
- Deprecate scatter upload buffer support for texture targets and prepare to clean up hacks that were previously done for the sake of GPU Scene that are no longer needed.
#rb ola.olsson
#preflight 644fe4750e33f2d51d787e71
[CL 25285293 by jamie hayes in ue5-main branch]
- Also moved FPrimitiveUniformShaderParametersBuilder to its own header to cut down rebuilding when changing scene & nanite definitions.
#rb jamie.hayes
#preflight 644919d41c2846595cfdbf28
[CL 25199110 by Ola Olsson in ue5-main branch]
