jason hoerner b19bb6be2f UE5_MAIN: Multi-view-family scene renderer refactor, part 1. Major structural change to allow scene renderer to accept multiple view families, with otherwise negligible changes in internal behavior. ...

* Added "BeginRenderingViewFamilies" render interface call that accepts multiple view families.  Original "BeginRenderingViewFamily" falls through to this.
* FSceneRenderer modified to include an array of view families, plus an active view family and the Views for that family.
* Swap ViewFamily to ActiveViewFamily.
* Swap Views array from TArray<FViewInfo> to TArrayView<FViewInfo>, including where the Views array is passed to functions.
* FSceneRenderer iterates over the view families, rendering each one at a time, as separate render graph executions.
* Some frame setup and cleanup logic outside the render graph runs once.
* Moved stateful FSceneRenderer members to FViewFamilyInfo, to preserve existing one-at-a-time view family rendering behavior.
* Display Cluster (Virtual Production) uses new API.

Next step will push everything into one render graph, which requires handling per-family external resources and cleaning up singletons (like FSceneTextures and FSceneTexturesConfig).  Once that's done, we'll be in a position to further interleave rendering, properly handle once per frame work, and solve artifacts in various systems.

#jira none
#rnx
#rb zach.bethel
#preflight 625df821b21bb49791d377c9

[CL 19813996 by jason hoerner in ue5-main branch]

2022-04-19 14:45:26 -04:00

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