Local light shadows are supported on mobile forward and deferred, need to enable full depth prepass to generate the ShadowMaskTexture.
Remove the 4 maximum local lights limitation on mobile forward.
Remove the "High Quality Reflection" on mobile forward.
Disable simple lights on mobile forward.
#jira UE-149064
#rb Dmitriy.Dyomin
#preflight 625d17da772cf82d3a6059a6
[CL 19784597 by Wei Liu in ue5-main 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
[CL 17787435 by Ben Ingram in ue5-main branch]
- Resource states/transitions handled by RDG
- Shader bindings using SHADER_PARAMETER_STRUCT.
Converted data and intermediate buffers to StructuredBuffers.
Removed a lot of unecessary structs from DistanceFiedLightingShared.h
#rb krzysztof.narkowicz
#preflight 61004413ab06550001afad83
[CL 16971682 by tiago costa in ue5-main branch]
2. Add an option to use high quality BRDF on mobile as the same with PC.
3. Fallback to default light shading model if it is not supported on mobile.
4. Use EnvBrdf for mobile deferred lighting pass.
#jira none
#rb Dmitriy.Dyomin
#preflight 60cdef32be81e8000118d85c
[CL 16722349 by Wei Liu in ue5-main branch]
Two pass occlusion for Non-VSM shadows
Changes shadowmap atlas rendering to render into the border, so we have real data for wide shadowmap filtering kernels. Also improves atlas HZB performance.
#rb ola.olsson
#fyi graham.wihlidal, brian.karis, andrew.lauritzen
[CL 14762582 by Rune Stubbe in ue5-main branch]
- at this point the proxy contains potentially dangling pointers to data owned by the Component and is a mine field.
#rb Patrick.Enfedaque
#jira UE-99623
#ROBOMERGE-SOURCE: CL 14336791 in //UE5/Release-5.0-M2/...
#ROBOMERGE-BOT: STARSHIP (Release-5.0-M2 -> Main) (v739-14336328)
[CL 14344156 by ola olsson in ue5-main branch]
#RB none
#ROBOMERGE-OWNER: arne.schober
#ROBOMERGE-AUTHOR: arne.schober
#ROBOMERGE-SOURCE: CL 12789290 via CL 12789324 via CL 12789325
#ROBOMERGE-BOT: RELEASE (Release-Engine-Staging -> Main) (v681-12776863)
[CL 12789326 by arne schober in Main branch]
Also changing the interface for better encapsulation by cutting the origial itterator concept and focusing on small subset of configurable itteration strategies instead.
#RB Andrew.Scheidecker, Yoan.StAmant
#ROBOMERGE-OWNER: arne.schober
#ROBOMERGE-AUTHOR: arne.schober
#ROBOMERGE-SOURCE: CL 12785392 via CL 12785681 via CL 12785682
#ROBOMERGE-BOT: RELEASE (Release-Engine-Staging -> Main) (v681-12776863)
[CL 12786795 by arne schober in Main branch]
[FYI] Daniel.Wright
#ROBOMERGE-SOURCE: CL 11508597 via CL 11513095 via CL 11513394
#ROBOMERGE-BOT: (v654-11333218)
[CL 11513734 by jian ru in Main branch]
