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- Issue 1 - UStaticMesh can be released before the proxy is destroyed:
- delay release of FRayTracingGeometryGroup until all proxies are unregistered.
- keep copy of RayTracingGeometryGroupHandle in render proxy
- Issue 2 - FRayTracingGeometryManager::RequestUpdateCachedRenderState(...) called when running !IsRayTracingAllowed()
- initialize RayTracingGeometryGroupHandle to INDEX_NONE
- only call FRayTracingGeometryManager::RequestUpdateCachedRenderState(...) if IsRayTracingAllowed()
[Original CL Desc]
Improvements to tracking of proxies requiring invalidation when raytracing geometry is streamed/built/made resident.
Context:
- The existing CachedRayTracingStateProxiesMap mapped [UStaticMesh -> Array of Proxies that need to be invalidated], however there was no way to map [FRayTracingGeometry -> Array of Proxies that need to be invalidated] since FRayTracingGeometry doesn't have a pointer to which UStaticMesh owns it. On top of that, not every FRayTracingGeometry is associated with a UStaticMesh.
- An alternative approach could be having a map [FRayTracingGeometry -> Array of Proxies that need to be invalidated] however that would require significantly more memory - O(#proxies x #LODs) instead of O(#proxies).
Change:
- Modified CachedRayTracingStateProxiesMap to use a more generic RayTracing::GeometryGroupHandle (int32) as key.
- Store RayTracing::GeometryGroupHandle in FRayTracingGeometry.
[FYI] aleksander.netzel
[CL 31210259 by tiago costa in ue5-main branch]