229 lines
8.2 KiB
Plaintext
229 lines
8.2 KiB
Plaintext
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// Copyright 2019-Present LexLiu. All Rights Reserved.
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#include "/Engine/Private/Common.ush"
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#include "/Engine/Generated/Material.ush"
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#include "LGUIHudVertexFactory.ush"
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struct FLGUIBasePassInterpolants
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{
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float4 PixelPosition : TEXCOORD8; // xyz = world position, w = clip z
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#if USE_WORLD_POSITION_EXCLUDING_SHADER_OFFSETS
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float3 PixelPositionExcludingWPO : TEXCOORD9;
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#endif
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};
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struct FLGUIBasePassVSToPS
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{
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FLGUIVertexFactoryInterpolantsVSToPS FactoryInterpolants;
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FLGUIBasePassInterpolants BasePassInterpolants;
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float4 Position : SV_POSITION;
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};
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FLGUIVertexFactoryInterpolantsVSToPS VertexFactoryGetInterpolantsVSToPS(float2 TexCoord0, float2 TexCoord1
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, FMaterialVertexParameters VertexParameters
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, half4 VertexColor
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, half3x3 TangentToWorld
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, float TangentToWorldSign
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)
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{
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FLGUIVertexFactoryInterpolantsVSToPS Interpolants;
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// Initialize the whole struct to 0
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// Really only the last two components of the packed UVs have the opportunity to be uninitialized
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Interpolants = (FLGUIVertexFactoryInterpolantsVSToPS) 0;
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#if NUM_TEX_COORD_INTERPOLATORS
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float2 CustomizedUVs[NUM_TEX_COORD_INTERPOLATORS];
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GetMaterialCustomizedUVs(VertexParameters, CustomizedUVs);
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GetCustomInterpolators(VertexParameters, CustomizedUVs);
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UNROLL
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for (int CoordinateIndex = 0; CoordinateIndex < NUM_TEX_COORD_INTERPOLATORS; CoordinateIndex++)
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{
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SetUV(Interpolants, CoordinateIndex, CustomizedUVs[CoordinateIndex]);
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}
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#endif
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#if COMPILER_GLSL_ES3_1 && !MOBILE_EMULATION
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VertexColor.rgba = VertexColor.bgra;
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#endif
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SetTangents(Interpolants, TangentToWorld[0], TangentToWorld[2], TangentToWorldSign);
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SetColor(Interpolants, VertexColor);
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return Interpolants;
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}
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/** Converts from vertex factory specific input to a FMaterialVertexParameters, which is used by vertex shader material inputs. */
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FMaterialVertexParameters GetMaterialVertexParameters(half4 VertexColor, float3 WorldPosition, float2 UVs[4], half3x3 TangentToWorld)
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{
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FMaterialVertexParameters Result = (FMaterialVertexParameters) 0;
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Result.WorldPosition = WorldPosition;
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Result.VertexColor = VertexColor;
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Result.TangentToWorld = TangentToWorld;
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#if NUM_MATERIAL_TEXCOORDS_VERTEX
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int MaxCount = min(NUM_MATERIAL_TEXCOORDS_VERTEX, 4);
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UNROLL
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for (int CoordinateIndex = 0; CoordinateIndex < MaxCount; CoordinateIndex++)
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{
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Result.TexCoords[CoordinateIndex] = UVs[CoordinateIndex].xy;
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}
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#endif
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return Result;
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}
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float4 TransformLocalToTranslatedWorld(float3 LocalPosition, FLWCMatrix LocalToWorld)
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{
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FLWCVector3 WorldPosition = LWCMultiply(LocalPosition, LocalToWorld);
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FLWCVector3 TranslatedWorldPosition = LWCAdd(WorldPosition, ResolvedView.PreViewTranslation);
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return float4(LWCToFloat(TranslatedWorldPosition), 1.0f);
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}
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void MainVS(
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in float3 Position : ATTRIBUTE0,
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in half4 Color : ATTRIBUTE1,
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in float2 TextureCoord0 : ATTRIBUTE2,
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in float2 TextureCoord1 : ATTRIBUTE3,
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in float2 TextureCoord2 : ATTRIBUTE4,
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in float2 TextureCoord3 : ATTRIBUTE5,
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in half3 TangentX : ATTRIBUTE6,
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// TangentZ.w contains sign of tangent basis determinant
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in half4 TangentZ : ATTRIBUTE7,
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out FLGUIBasePassVSToPS Output
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)
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{
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ResolvedView = ResolveView();
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FPrimitiveSceneData Primitive = GetPrimitiveDataFromUniformBuffer();
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//float4 WorldPosition = mul(float4(Position, 1.0), GetPrimitiveData(Parameters.PrimitiveId).LocalToWorld);
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float4 WorldPosition = TransformLocalToTranslatedWorld(Position, Primitive.LocalToWorld);
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//float4 WorldPosition = float4(Position.xyz + ResolvedView.PreViewTranslation.xyz, 1.0);
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float TangentSign;
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half3x3 TangentToLocal = CalcTangentToLocal(TangentX, TangentZ, TangentSign);
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half3x3 TangentToWorld = CalcTangentToWorld(TangentToLocal, LWCToFloat3x3(Primitive.LocalToWorld), Primitive.InvNonUniformScale);
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float TangentToWorldSign = TangentSign * GetPrimitive_DeterminantSign_FromFlags(Primitive.Flags);
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float2 UVs[4];
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UVs[0] = TextureCoord0;
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UVs[1] = TextureCoord1;
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UVs[2] = TextureCoord2;
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UVs[3] = TextureCoord3;
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FMaterialVertexParameters VertexParameters = GetMaterialVertexParameters(Color, WorldPosition.xyz, UVs, TangentToWorld);
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half3 WorldPositionOffset = GetMaterialWorldPositionOffset(VertexParameters);
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WorldPosition.xyz += WorldPositionOffset;
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Output.Position = mul(WorldPosition, ResolvedView.TranslatedWorldToClip);
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Output.BasePassInterpolants.PixelPosition = WorldPosition;
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#if USE_WORLD_POSITION_EXCLUDING_SHADER_OFFSETS
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Output.BasePassInterpolants.PixelPositionExcludingWPO = WorldPosition.xyz;
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#endif
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Output.FactoryInterpolants = VertexFactoryGetInterpolantsVSToPS(TextureCoord0, TextureCoord1
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, VertexParameters
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, Color
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, TangentToWorld, TangentToWorldSign
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);
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Output.BasePassInterpolants.PixelPosition.w = Output.Position.w;
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}
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FMaterialPixelParameters GetMaterialPixelParameters(FLGUIVertexFactoryInterpolantsVSToPS Interpolants, float4 SvPosition)
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{
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// GetMaterialPixelParameters is responsible for fully initializing the result
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FMaterialPixelParameters Result = MakeInitializedMaterialPixelParameters();
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#if NUM_TEX_COORD_INTERPOLATORS
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UNROLL
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for( int CoordinateIndex = 0; CoordinateIndex < NUM_TEX_COORD_INTERPOLATORS; CoordinateIndex++ )
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{
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Result.TexCoords[CoordinateIndex] = GetUV(Interpolants, CoordinateIndex);
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}
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#endif
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half3 TangentToWorld0 = GetTangentToWorld0(Interpolants).xyz;
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half4 TangentToWorld2 = GetTangentToWorld2(Interpolants);
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Result.UnMirrored = TangentToWorld2.w;
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Result.VertexColor = GetColor(Interpolants);
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Result.TangentToWorld = AssembleTangentToWorld(TangentToWorld0, TangentToWorld2);
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return Result;
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}
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void ApplyPixelDepthOffsetForLGUIBasePass(inout FMaterialPixelParameters MaterialParameters, FPixelMaterialInputs PixelMaterialInputs, out float OutDepth)
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{
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float PixelDepthOffset = ApplyPixelDepthOffsetToMaterialParameters(MaterialParameters, PixelMaterialInputs, OutDepth);
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}
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#if LGUI_BLEND_DEPTH
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Texture2D _SceneDepthTex;
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SamplerState _SceneDepthTexSampler;
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float4 _SceneDepthTextureScaleOffset;
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float _SceneDepthBlend;
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#if LGUI_DEPTH_FADE
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float _SceneDepthFade;
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#endif
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#endif
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float _ColorCorrectionValueForHDR;
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void MainPS(
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FLGUIVertexFactoryInterpolantsVSToPS Interpolants
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, FLGUIBasePassInterpolants BasePassInterpolants
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, in float4 SvPosition : SV_Position
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OPTIONAL_IsFrontFace
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, out half4 OutColor : SV_Target0
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#if OUTPUT_PIXEL_DEPTH_OFFSET
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, out float OutDepth : SV_Depth
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#endif
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)
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{
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ResolvedView = ResolveView();
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FMaterialPixelParameters MaterialParameters = GetMaterialPixelParameters(Interpolants, SvPosition);
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FPixelMaterialInputs PixelMaterialInputs;
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{
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float4 ScreenPosition = SvPositionToResolvedScreenPosition(SvPosition);
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float3 WorldPosition = BasePassInterpolants.PixelPosition.xyz;
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float3 WorldPositionExcludingWPO = BasePassInterpolants.PixelPosition.xyz;
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#if USE_WORLD_POSITION_EXCLUDING_SHADER_OFFSETS
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WorldPositionExcludingWPO = BasePassInterpolants.PixelPositionExcludingWPO;
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#endif
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CalcMaterialParametersEx(MaterialParameters, PixelMaterialInputs, SvPosition, ScreenPosition, bIsFrontFace, WorldPosition, WorldPositionExcludingWPO);
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}
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#if OUTPUT_PIXEL_DEPTH_OFFSET
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ApplyPixelDepthOffsetForLGUIBasePass(MaterialParameters, PixelMaterialInputs, OutDepth);
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#endif
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OutColor = half4(GetMaterialEmissive(PixelMaterialInputs).rgb, GetMaterialOpacity(PixelMaterialInputs));
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OutColor.rgb = pow(OutColor.rgb, _ColorCorrectionValueForHDR);
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#if MATERIALBLENDING_MASKED
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clip(GetMaterialMask(PixelMaterialInputs));
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#endif
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#if LGUI_BLEND_DEPTH
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float PixelDepth = min(MaterialParameters.ScreenPosition.z / MaterialParameters.ScreenPosition.w, MaterialParameters.SvPosition.z);
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float2 ScreenUV = MaterialParameters.ScreenPosition.xy / MaterialParameters.ScreenPosition.w;
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ScreenUV = ScreenUV * 0.5f + float2(0.5f, 0.5f);
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ScreenUV.y = 1.0f - ScreenUV.y;
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float ExistDepth = _SceneDepthTex.Sample(_SceneDepthTexSampler, ScreenUV * _SceneDepthTextureScaleOffset.xy + _SceneDepthTextureScaleOffset.zw).x;
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#if LGUI_DEPTH_FADE
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float DepthFadeValue = smoothstep(0, 1, saturate((PixelDepth - ExistDepth) / (_SceneDepthFade * ExistDepth * ExistDepth)));//if without the "ExistDepth * ExistDepth" then the fade distance will be affect by camera distance.
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#else
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float DepthFadeValue = step(ExistDepth, PixelDepth);
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#endif
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OutColor.a = lerp(_SceneDepthBlend * OutColor.a, OutColor.a, DepthFadeValue);
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#endif
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}
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