tiago costa 8da4936663 Support Callable Shaders in FRayTracingScene. ...

- FRHIRayTracingScene is created with NumCallableShaderSlots.
- Application can add entries to SBT using CallableCommands array.
- ShaderBindings are generated from CallableCommands in BindRayTracingMaterialPipeline(...) once the RTPSO is available so CallableShaderIndex is known.
- Shader Bindings are then merged and set during WaitForRayTracingScene.

#rb yuriy.odonnell
#preflight 628d4053b378b39d419afc4d

[CL 20356249 by tiago costa in ue5-main branch]

2022-05-24 17:27:36 -04:00

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