This way we can skip flagging constant/zero expressions (which we don't know about during the first pass)
#rb none
#jira none
#preflight 6227cb21671c913c052ca22f
[CL 19311693 by Ben Ingram in ue5-main branch]
This allows cached data to be based on expressions that are active/connected
#rb none
#jira none
#preflight 621fce7831454c90cc079dd2
[CL 19227403 by Ben Ingram in ue5-main branch]
Prevent stack overflow from material editor setting color from details view that doesn't own current color picker.
#jira UE-120042
#rb none
#ROBOMERGE-AUTHOR: ben.ingram
#ROBOMERGE-SOURCE: CL 18238668 via CL 18239212 via CL 18239370 via CL 18240762 via CL 18240831
#ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v895-18170469)
[CL 18242931 by ben ingram in ue5-release-engine-test branch]
This represents UE4/Main @17774255, Release-5.0 @17791557 and Dev-PerfTest @17789485
[CL 17794212 by aurel cordonnier in ue5-release-engine-test branch]
Basic approach is to add HLSL types FLWCScalar, FLWCMatrix, FLWCVector, etc. Inside shaders, absolute world space position values should be represented as FLWCVector3. Matrices that transform *into* absolute world space become FLWCMatrix. Matrices that transform *from* world space become FLWCInverseMatrix. Generally LWC values work by extending the regular 'float' value with an additional tile coordinate. Final tile size will be a trade-off between scale/accuracy; I'm using 256k for now, but may need to be adjusted. Value represented by a FLWCVector thus becomes V.Tile * TileSize + V.Offset. Most operations can be performed directly on LWC values. There are HLSL functions like LWCAdd, LWCSub, LWCMultiply, LWCDivide (operator overloading would be really nice here). The goal is to stay with LWC values for as long as needed, then convert to regular float values when possible. One thing that comes up a lot is working in translated (rather than absolute) world space. WorldSpace + View.PrevPreViewTranslation = TranslatedWorldspace. Except 'View.PrevPreViewTranslation' is now a FLWCVector3, and WorldSpace quantities should be as well. So that becomes LWCAdd(WorldSpace, View.PrevPreViewTranslation) = TranslatedWorldspace. Assuming that we're talking about a position that's "reasonably close" to the camera, it should be safe to convert the translated WS value to float. The 'tile' coordinate of the 2 LWC values should cancel out when added together in this case. I've done some work throughout the shader code to do this. Materials are fully supporting LWC-values as well. Projective texturing and vertex animation materials that I've tested work correctly even when positioned "far away" from the origin.
Lots of work remains to fully convert all of our shader code. There's a function LWCHackToFloat(), which is a simple wrapper for LWCToFloat(). The idea of HackToFloat is to mark places that need further attention, where I'm simply converting absolute WS positions to float, to get shaders to compile. Shaders converted in this way should continue to work for all existing content (without LWC-scale values), but they will break if positions get too large.
General overview of changed files:
LargeWorldCoordinates.ush - This defines the FLWC types and operations
GPUScene.cpp, SceneData.ush - Primitives add an extra 'float3' tile coordinate. Instance data is unchanged, so instances need to stay within single-precision range of the primitive origin. Could potentially split instances behind the scenes (I think) if we don't want this limitation
HLSLMaterialDerivativeAutogen.cpp, HLSLMaterialTranslator.cpp, Preshader.cpp - Translated materials to use LWC values
SceneView.cpp, SceneRelativeViewMatrices.cpp, ShaderCompiler.cpp, InstancedStereo.ush - View uniform buffer includes LWC values where appropriate
#jira UE-117101
#rb arne.schober, Michael.Galetzka
#ROBOMERGE-AUTHOR: ben.ingram
#ROBOMERGE-SOURCE: CL 17787435 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v881-17767770)
[CL 17787478 by ben ingram in ue5-release-engine-test branch]
- Let the game thread remove its reference before the deferred deletion so we don't trigger a non-zero ref count check in ~FMaterial.
#rb Ben.Ingram
#preflight 610071545938f90001e90c85
#ROBOMERGE-SOURCE: CL 16975782 via CL 16975842
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v838-16927207)
[CL 16975864 by jason nadro in ue5-release-engine-test branch]
Instead, add 'SourceIndex' directly to UEdGraphPin and remove the map
Too many edge cases where something would modify pins directly, and the map would get out of sync with actual pins
#jira UE-119861
#rb lauren.barnes
#ROBOMERGE-SOURCE: CL 16897567 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v836-16769935)
[CL 16897572 by ben ingram in ue5-release-engine-test branch]
Contributed by The Coalition
#rb ben.ingram
#jira none
#ROBOMERGE-SOURCE: CL 16347000 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v804-16311228)
[CL 16347005 by kevin ortegren in ue5-release-engine-test branch]
