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c11d382a6f0acddb0bc1e95ab9bc5f8fc3570b55
UnrealEngine/Engine/Shaders/Private/LocalVertexFactory.ush
Jeffreytsai1004 c11d382a6f ue5-main
2025-05-18 13:04:45 +08:00

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// Copyright Epic Games, Inc. All Rights Reserved.
/*=============================================================================
LocalVertexFactory.ush: Local vertex factory shader code.
=============================================================================*/
#include "VertexFactoryCommon.ush"
#include "LocalVertexFactoryCommon.ush"
#include "LightmapData.ush"
#include "GpuSkinCommon.ush"
#include "SplineMeshCommon.ush"
#include "/Engine/Generated/UniformBuffers/PrecomputedLightingBuffer.ush"
#if USE_INSTANCING
float4 InstancingOffset;
uint InstanceOffset;
#endif
#ifndef SUPPORT_GPUSKIN_PASSTHROUGH
#define SUPPORT_GPUSKIN_PASSTHROUGH 0
#endif
#ifndef MANUAL_VERTEX_FETCH
#define MANUAL_VERTEX_FETCH 0
#endif
#if MANUAL_VERTEX_FETCH
#define VF_ColorIndexMask_Index 0
#define VF_NumTexcoords_Index 1
#define FV_LightMapIndex_Index 2
#define VF_VertexOffset 3
Buffer<float4> VertexFetch_InstanceOriginBuffer;
Buffer<float4> VertexFetch_InstanceTransformBuffer;
Buffer<float4> VertexFetch_InstanceLightmapBuffer;
#define VF_REQUIRES_HITPROXY_INDIRECTION 1
int VertexFactoryGetVertexFetchParameter(int ParameterIndex)
{
return LocalVF.VertexFetch_Parameters[ParameterIndex];
}
#endif //! MANUAL_VERTEX_FETCH
#define VF_REQUIRES_HITPROXY_INDIRECTION 1
/**
* Per-vertex inputs from bound vertex buffers
*/
struct FVertexFactoryInput
{
float4 Position : ATTRIBUTE0;
#if !MANUAL_VERTEX_FETCH
#if METAL_ES3_1_PROFILE
float3 TangentX : ATTRIBUTE1;
// TangentZ.w contains sign of tangent basis determinant
float4 TangentZ : ATTRIBUTE2;
float4 Color : ATTRIBUTE3;
#else
HALF3_TYPE TangentX : ATTRIBUTE1;
// TangentZ.w contains sign of tangent basis determinant
HALF4_TYPE TangentZ : ATTRIBUTE2;
HALF4_TYPE Color : ATTRIBUTE3;
#endif
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX
#if !MANUAL_VERTEX_FETCH
// These used to be packed texcoord arrays, but these cause problems with alighnment on some Vulkan drivers
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 1
float4 TexCoords0 : ATTRIBUTE4;
#elif NUM_MATERIAL_TEXCOORDS_VERTEX == 1
float2 TexCoords0 : ATTRIBUTE4;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 3
float4 TexCoords1 : ATTRIBUTE5;
#elif NUM_MATERIAL_TEXCOORDS_VERTEX == 3
float2 TexCoords1 : ATTRIBUTE5;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 5
float4 TexCoords2 : ATTRIBUTE6;
#elif NUM_MATERIAL_TEXCOORDS_VERTEX == 5
float2 TexCoords2 : ATTRIBUTE6;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 7
float4 TexCoords3 : ATTRIBUTE7;
#elif NUM_MATERIAL_TEXCOORDS_VERTEX == 7
float2 TexCoords3 : ATTRIBUTE7;
#endif
#endif
#elif USE_PARTICLE_SUBUVS && !MANUAL_VERTEX_FETCH
float2 TexCoords0 : ATTRIBUTE4;
#endif
// Dynamic instancing related attributes with InstanceIdOffset : ATTRIBUTE13
VF_GPUSCENE_DECLARE_INPUT_BLOCK(13)
#if USE_INSTANCING && !MANUAL_VERTEX_FETCH
float4 InstanceOrigin : ATTRIBUTE8; // per-instance random in w
half4 InstanceTransform1 : ATTRIBUTE9; // hitproxy.r + 256 * selected in .w
half4 InstanceTransform2 : ATTRIBUTE10; // hitproxy.g in .w
half4 InstanceTransform3 : ATTRIBUTE11; // hitproxy.b in .w
float4 InstanceLightMapAndShadowMapUVBias : ATTRIBUTE12;
#endif //USE_INSTANCING
#if USE_INSTANCING
#undef GetInstanceIdFromVF
#define GetInstanceIdFromVF(VFInput) (VFInput.InstanceId)
uint InstanceId : SV_InstanceID;
#else
VF_INSTANCED_STEREO_DECLARE_INPUT_BLOCK()
#endif
VF_MOBILE_MULTI_VIEW_DECLARE_INPUT_BLOCK()
#if SUPPORT_GPUSKIN_PASSTHROUGH && !MANUAL_VERTEX_FETCH
float4 PreSkinPosition : ATTRIBUTE14;
#endif
#if NEEDS_LIGHTMAP_COORDINATE && !MANUAL_VERTEX_FETCH
float2 LightMapCoordinate : ATTRIBUTE15;
#endif
uint VertexId : SV_VertexID;
};
#if SUPPORT_GPUSKIN_PASSTHROUGH
uint bIsGPUSkinPassThrough;
#endif
bool IsGPUSkinPassThrough()
{
#if SUPPORT_GPUSKIN_PASSTHROUGH
return bIsGPUSkinPassThrough;
#else
return false;
#endif
}
#if RAYHITGROUPSHADER || COMPUTESHADER
uint GetNumRayTracingDynamicMeshVerticesIndirect()
{
return 0;
}
#endif
#if RAYHITGROUPSHADER
FVertexFactoryInput LoadVertexFactoryInputForHGS(uint TriangleIndex, int VertexIndex)
{
FVertexFactoryInput Input = (FVertexFactoryInput)0;
FTriangleBaseAttributes Tri = LoadTriangleBaseAttributes(TriangleIndex);
Input.VertexId = Tri.Indices[VertexIndex];
Input.Position = float4(Tri.LocalPositions[VertexIndex], 1.0f);
#if VF_USE_PRIMITIVE_SCENE_DATA
const uint GPUSceneInstanceId = GetInstanceUserData();
const FInstanceSceneData InstanceSceneData = GetInstanceSceneData(GPUSceneInstanceId);
VF_GPUSCENE_SET_INPUT_FOR_RT(Input, GPUSceneInstanceId, InstanceSceneData.RelativeId);
#if USE_INSTANCING
Input.InstanceId = InstanceSceneData.RelativeId;
#endif
#else
#error "HGS requires GPU Scene support"
#endif // VF_USE_PRIMITIVE_SCENE_DATA
return Input;
}
#endif
#if COMPUTESHADER && MANUAL_VERTEX_FETCH
FVertexFactoryInput LoadVertexFactoryInputForDynamicUpdate(uint TriangleIndex, int VertexIndex, uint PrimitiveId, uint DrawInstanceId)
{
FVertexFactoryInput Input = (FVertexFactoryInput)0;
if (IsGPUSkinPassThrough())
{
// GPUSkinPassThrough can change the PositionBuffer every frame but doesn't always update the corresponding
// LocalVF.VertexFetch_PositionBuffer since it relies on fixed function vertex buffer fetch and so doesn't need
// to pay the cost of recreating the UniformBuffer.
// For the compute shader case we store the PositionBuffer SRV in the loose uniform buffer.
Input.VertexId = TriangleIndex * 3 + VertexIndex;
uint VertexOffset = LocalVF.VertexFetch_Parameters[VF_VertexOffset] + Input.VertexId;
Input.Position.x = GPUSkinPassThroughVFLooseParameters.PositionBuffer[VertexOffset * 3 + 0];
Input.Position.y = GPUSkinPassThroughVFLooseParameters.PositionBuffer[VertexOffset * 3 + 1];
Input.Position.z = GPUSkinPassThroughVFLooseParameters.PositionBuffer[VertexOffset * 3 + 2];
}
else
{
Input.VertexId = TriangleIndex * 3 + VertexIndex;
uint VertexOffset = LocalVF.VertexFetch_Parameters[VF_VertexOffset] + Input.VertexId * 3;
Input.Position.x = LocalVF.VertexFetch_PositionBuffer[VertexOffset + 0];
Input.Position.y = LocalVF.VertexFetch_PositionBuffer[VertexOffset + 1];
Input.Position.z = LocalVF.VertexFetch_PositionBuffer[VertexOffset + 2];
}
FPrimitiveSceneData PrimitiveData = GetPrimitiveData(PrimitiveId);
VF_GPUSCENE_SET_INPUT_FOR_RT(Input, PrimitiveData.InstanceSceneDataOffset + DrawInstanceId, DrawInstanceId);
#if USE_SPLINEDEFORM
Input.Position.w = 1.0;
#endif
return Input;
}
#endif
/**
* Per-vertex inputs from bound vertex buffers. Used by passes with a trimmed down position-only shader.
*/
struct FPositionOnlyVertexFactoryInput
{
float4 Position : ATTRIBUTE0;
// Dynamic instancing related attributes with InstanceIdOffset : ATTRIBUTE1
VF_GPUSCENE_DECLARE_INPUT_BLOCK(1)
#if USE_INSTANCING && !MANUAL_VERTEX_FETCH
float4 InstanceOrigin : ATTRIBUTE8; // per-instance random in w
half4 InstanceTransform1 : ATTRIBUTE9; // hitproxy.r + 256 * selected in .w
half4 InstanceTransform2 : ATTRIBUTE10; // hitproxy.g in .w
half4 InstanceTransform3 : ATTRIBUTE11; // hitproxy.b in .w
#endif // USE_INSTANCING
#if USE_INSTANCING
#undef GetInstanceIdFromVF
#define GetInstanceIdFromVF(VFInput) (VFInput.InstanceId)
uint InstanceId : SV_InstanceID;
#else
VF_INSTANCED_STEREO_DECLARE_INPUT_BLOCK()
#endif
VF_MOBILE_MULTI_VIEW_DECLARE_INPUT_BLOCK()
#if MANUAL_VERTEX_FETCH
uint VertexId : SV_VertexID;
#endif
};
/**
* Per-vertex inputs from bound vertex buffers. Used by passes with a trimmed down position-and-normal-only shader.
*/
struct FPositionAndNormalOnlyVertexFactoryInput
{
float4 Position : ATTRIBUTE0;
float4 Normal : ATTRIBUTE2;
// Dynamic instancing related attributes with InstanceIdOffset : ATTRIBUTE1
VF_GPUSCENE_DECLARE_INPUT_BLOCK(1)
#if USE_INSTANCING && !MANUAL_VERTEX_FETCH
float4 InstanceOrigin : ATTRIBUTE8; // per-instance random in w
half4 InstanceTransform1 : ATTRIBUTE9; // hitproxy.r + 256 * selected in .w
half4 InstanceTransform2 : ATTRIBUTE10; // hitproxy.g in .w
half4 InstanceTransform3 : ATTRIBUTE11; // hitproxy.b in .w
#endif // USE_INSTANCING
#if USE_INSTANCING
#undef GetInstanceIdFromVF
#define GetInstanceIdFromVF(VFInput) (VFInput.InstanceId)
uint InstanceId : SV_InstanceID;
#else
VF_INSTANCED_STEREO_DECLARE_INPUT_BLOCK()
#endif
VF_MOBILE_MULTI_VIEW_DECLARE_INPUT_BLOCK()
#if MANUAL_VERTEX_FETCH
uint VertexId : SV_VertexID;
#endif
};
/** The per-instance data that is either manually-fetched or included with the input vertex data */
struct FVertexFactoryInstanceInput
{
float4 Transform1;
float4 Transform2;
float4 Transform3;
float4 Origin;
};
/** Intermediates that are common to all supported vertex factory input types */
struct FVertexFactoryIntermediatesCommon
{
/** Cached primitive and instance data */
FSceneDataIntermediates SceneData;
#if USE_INSTANCING || USE_INSTANCE_CULLING
FVertexFactoryInstanceInput InstanceInput;
#endif
#if USE_SPLINEDEFORM
FSplineMeshShaderParams SplineMeshParams;
#endif
};
/**
* Caches intermediates that would otherwise have to be computed multiple times. Avoids relying on the compiler to optimize out redundant operations.
*/
struct FVertexFactoryIntermediates
{
FVertexFactoryIntermediatesCommon Common;
#if VF_USE_PRIMITIVE_SCENE_DATA
int PrimitiveLocalInstanceIndex;
#endif
half3x3 TangentToLocal;
half3x3 TangentToWorld;
half TangentToWorldSign;
half4 Color;
bool bEvaluateWorldPositionOffset;
#if USE_INSTANCE_CULLING
float4 HitProxyId;
float IsSelected;
#endif
float IsVisible;
#if USE_INSTANCING || USE_INSTANCE_CULLING
float4 InstanceLightMapAndShadowMapUVBias;
// x = per-instance fade out amount, y = hide/show flag, z dither fade cutoff, w - CustomData index
float4 PerInstanceParams;
#endif
float3 PreSkinPosition;
};
FPrimitiveSceneData GetPrimitiveData(FVertexFactoryIntermediatesCommon Intermediates)
{
return Intermediates.SceneData.Primitive;
}
FPrimitiveSceneData GetPrimitiveData(FVertexFactoryIntermediates Intermediates)
{
return GetPrimitiveData(Intermediates.Common);
}
FInstanceSceneData GetInstanceData(FVertexFactoryIntermediatesCommon Intermediates)
{
return Intermediates.SceneData.InstanceData;
}
FInstanceSceneData GetInstanceData(FVertexFactoryIntermediates Intermediates)
{
return GetInstanceData(Intermediates.Common);
}
#if USE_SPLINEDEFORM
#if VF_USE_PRIMITIVE_SCENE_DATA && FEATURE_LEVEL > FEATURE_LEVEL_ES3_1
FSplineMeshShaderParams GetSplineMeshParams(FInstanceSceneData InstanceData)
{
return SplineMeshLoadParamsFromInstancePayload(InstanceData);
}
#else
// These currently still need to be bound loosely when not using GPUScene
float4 SplineParams[SPLINE_MESH_PARAMS_FLOAT4_SIZE];
FSplineMeshShaderParams GetSplineMeshParams(FInstanceSceneData InstanceData)
{
return UnpackSplineMeshParams(SplineParams);
}
#endif // VF_USE_PRIMITIVE_SCENE_DATA && FEATURE_LEVEL > FEATURE_LEVEL_ES3_1
#endif // USE_SPLINEDEFORM
FVertexFactoryInstanceInput MakeInstanceInput(float4 Transform1, float4 Transform2, float4 Transform3, float4 Origin)
{
FVertexFactoryInstanceInput Result;
Result.Transform1 = Transform1;
Result.Transform2 = Transform2;
Result.Transform3 = Transform3;
Result.Origin = Origin;
return Result;
}
FVertexFactoryInstanceInput InitInstanceInput()
{
return MakeInstanceInput(
float4(1, 0, 0, 0),
float4(0, 1, 0, 0),
float4(0, 0, 1, 0),
float4(0, 0, 0, 0)
);
}
#if USE_INSTANCING
#if MANUAL_VERTEX_FETCH
FVertexFactoryInstanceInput ManualFetchInstanceInput(uint InstanceId)
{
FVertexFactoryInstanceInput Result = (FVertexFactoryInstanceInput)0;
Result.Transform1 = InstanceVF.VertexFetch_InstanceTransformBuffer[3 * (InstanceId + InstanceOffset) + 0];
Result.Transform2 = InstanceVF.VertexFetch_InstanceTransformBuffer[3 * (InstanceId + InstanceOffset) + 1];
Result.Transform3 = InstanceVF.VertexFetch_InstanceTransformBuffer[3 * (InstanceId + InstanceOffset) + 2];
Result.Origin = InstanceVF.VertexFetch_InstanceOriginBuffer[(InstanceId + InstanceOffset)];
return Result;
}
#define LOCALVF_GET_INSTANCE_INPUT(VFInput) ManualFetchInstanceInput(GetInstanceId(GetInstanceIdFromVF(VFInput)))
#else
#define LOCALVF_GET_INSTANCE_INPUT(VFInput) MakeInstanceInput( \
VFInput.InstanceTransform1, \
VFInput.InstanceTransform2, \
VFInput.InstanceTransform3, \
VFInput.InstanceOrigin)
#endif // MANUAL_VERTEX_FETCH
float4x4 GetInstanceTransform(FVertexFactoryInstanceInput InstanceInput)
{
return float4x4(
float4(InstanceInput.Transform1.xyz, 0.0f),
float4(InstanceInput.Transform2.xyz, 0.0f),
float4(InstanceInput.Transform3.xyz, 0.0f),
float4(InstanceInput.Origin.xyz, 1.0f)
);
}
float4x4 GetInstanceTransform(FVertexFactoryIntermediatesCommon Intermediates)
{
return GetInstanceTransform(Intermediates.InstanceInput);
}
float4x4 GetInstanceTransform(FVertexFactoryIntermediates Intermediates)
{
return GetInstanceTransform(Intermediates.Common);
}
float4x4 GetInstancePrevTransform(FVertexFactoryIntermediates Intermediates)
{
// Assumes instance transform never change, which means per-instance motion will cause TAA and motion blur artifacts.
return GetInstanceTransform(Intermediates);
}
float4x4 GetInstanceTransform(FPositionOnlyVertexFactoryInput Input)
{
return GetInstanceTransform(LOCALVF_GET_INSTANCE_INPUT(Input));
}
float4x4 GetInstanceTransform(FPositionAndNormalOnlyVertexFactoryInput Input)
{
return GetInstanceTransform(LOCALVF_GET_INSTANCE_INPUT(Input));
}
half3x3 GetInstanceToLocal3x3(FVertexFactoryIntermediates Intermediates)
{
return (half3x3)GetInstanceTransform(Intermediates);
}
float2 GetInstanceShadowMapBias(FVertexFactoryIntermediates Intermediates)
{
return Intermediates.InstanceLightMapAndShadowMapUVBias.zw;
}
float2 GetInstanceLightMapBias(FVertexFactoryIntermediates Intermediates)
{
return Intermediates.InstanceLightMapAndShadowMapUVBias.xy;
}
float GetInstanceSelected(FVertexFactoryIntermediates Intermediates)
{
return trunc(Intermediates.Common.InstanceInput.Transform1.w * (1.0 / 256.0));
}
float GetInstanceRandom(FVertexFactoryIntermediates Intermediates)
{
return Intermediates.Common.InstanceInput.Origin.w;
}
float3 GetInstanceOrigin(FVertexFactoryIntermediates Intermediates)
{
float3 Offset = mul(InstancingOffset.xyz, GetInstanceToLocal3x3(Intermediates));
return Intermediates.Common.InstanceInput.Origin.xyz + Offset;
}
#else // !USE_INSTANCING
// Stub this for non-instancing
#define LOCALVF_GET_INSTANCE_INPUT(VFInput) InitInstanceInput()
#endif // USE_INSTANCING
#if USE_INSTANCE_CULLING
float2 GetInstanceShadowMapBias(FVertexFactoryIntermediates Intermediates)
{
// GPUCULL_TODO: This data is not yet pushed to GPU-Scene for non-nanite instances.
//return GetInstanceData(Intermediates).InstanceLightMapAndShadowMapUVBias.zw;
return Intermediates.InstanceLightMapAndShadowMapUVBias.zw;
}
float2 GetInstanceLightMapBias(FVertexFactoryIntermediates Intermediates)
{
// GPUCULL_TODO: This data is not yet pushed to GPU-Scene for non-nanite instances.
//return GetInstanceData(Intermediates).InstanceLightMapAndShadowMapUVBias.xy;
return Intermediates.InstanceLightMapAndShadowMapUVBias.xy;
}
#endif // USE_INSTANCE_CULLING
/** Converts from vertex factory specific interpolants to a FMaterialPixelParameters, which is used by material inputs. */
FMaterialPixelParameters GetMaterialPixelParameters(FVertexFactoryInterpolantsVSToPS Interpolants, float4 SvPosition)
{
// GetMaterialPixelParameters is responsible for fully initializing the result
FMaterialPixelParameters Result = MakeInitializedMaterialPixelParameters();
#if NUM_TEX_COORD_INTERPOLATORS
UNROLL
for( int CoordinateIndex = 0; CoordinateIndex < NUM_TEX_COORD_INTERPOLATORS; CoordinateIndex++ )
{
Result.TexCoords[CoordinateIndex] = GetUV(Interpolants, CoordinateIndex);
}
#endif
#if USE_PARTICLE_SUBUVS
// Output TexCoord0 for when previewing materials that use ParticleSubUV.
Result.Particle.SubUVCoords[0] = GetUV(Interpolants, 0);
Result.Particle.SubUVCoords[1] = GetUV(Interpolants, 0);
#endif // USE_PARTICLE_SUBUVS
half3 TangentToWorld0 = GetTangentToWorld0(Interpolants).xyz;
half4 TangentToWorld2 = GetTangentToWorld2(Interpolants);
Result.UnMirrored = TangentToWorld2.w;
Result.VertexColor = GetColor(Interpolants);
// Required for previewing materials that use ParticleColor
Result.Particle.Color = half4(1,1,1,1);
#if USE_INSTANCING || USE_INSTANCE_CULLING
#if NEEDS_PER_INSTANCE_PARAMS
Result.PerInstanceParams = Interpolants.PerInstanceParams;
#else
Result.PerInstanceParams = float4(1, 1, 0, 0);
#endif
#endif
Result.TangentToWorld = AssembleTangentToWorld( TangentToWorld0, TangentToWorld2 );
#if USE_WORLDVERTEXNORMAL_CENTER_INTERPOLATION
Result.WorldVertexNormal_Center = Interpolants.TangentToWorld2_Center.xyz;
#endif
#if LIGHTMAP_UV_ACCESS
#if NEEDS_LIGHTMAP_COORDINATE
#if (ES3_1_PROFILE)
// Not supported in pixel shader
Result.LightmapUVs = float2(0, 0);
#else
Result.LightmapUVs = Interpolants.LightMapCoordinate.xy;
#endif // ES3_1_PROFILE
#endif // NEEDS_LIGHTMAP_COORDINATE
#endif // LIGHTMAP_UV_ACCESS
Result.TwoSidedSign = 1;
Result.PrimitiveId = GetPrimitiveId(Interpolants);
#if USES_PER_INSTANCE_CUSTOM_DATA && VF_USE_PRIMITIVE_SCENE_DATA
Result.CustomDataOffset = Interpolants.CustomDataOffset;
Result.CustomDataCount = Interpolants.CustomDataCount;
#endif
#if NEEDS_PER_INSTANCE_RANDOM_PS
Result.PerInstanceRandom = Interpolants.PerInstanceRandom;
#endif
#if HAS_INSTANCE_LOCAL_TO_WORLD_PS
Result.InstanceLocalToWorld = GetInstanceLocalToWorld(Interpolants);
#endif
#if HAS_INSTANCE_WORLD_TO_LOCAL_PS
Result.InstanceWorldToLocal = GetInstanceWorldToLocal(Interpolants);
#endif
#if NEEDS_PARTICLE_LOCAL_TO_WORLD || NEEDS_PARTICLE_WORLD_TO_LOCAL
FPrimitiveSceneData PrimitiveData = GetPrimitiveData(Result.PrimitiveId);
#endif
#if NEEDS_PARTICLE_LOCAL_TO_WORLD
Result.Particle.ParticleToWorld = PrimitiveData.LocalToWorld;
#endif
#if NEEDS_PARTICLE_WORLD_TO_LOCAL
Result.Particle.WorldToParticle = PrimitiveData.WorldToLocal;
#endif
return Result;
}
half3x3 CalcTangentToWorldNoScale(FVertexFactoryIntermediates Intermediates, half3x3 TangentToLocal)
{
half3x3 LocalToWorld = DFToFloat3x3(GetInstanceData(Intermediates).LocalToWorld);
half3 InvScale = GetInstanceData(Intermediates).InvNonUniformScale;
LocalToWorld[0] *= InvScale.x;
LocalToWorld[1] *= InvScale.y;
LocalToWorld[2] *= InvScale.z;
return mul(TangentToLocal, LocalToWorld);
}
float3 VertexFactoryGetPreviousInstanceSpacePosition(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates);
float3 VertexFactoryGetInstanceSpacePosition(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates);
/** Converts from vertex factory specific input to a FMaterialVertexParameters, which is used by vertex shader material inputs. */
FMaterialVertexParameters GetMaterialVertexParameters(
FVertexFactoryInput Input,
FVertexFactoryIntermediates Intermediates,
float3 WorldPosition,
half3x3 TangentToLocal,
bool bIsPreviousFrame = false)
{
FMaterialVertexParameters Result = MakeInitializedMaterialVertexParameters();
Result.SceneData = Intermediates.Common.SceneData;
// FIXME: just for compatibility with assets that use custom HLSL expressions, will be removed once we fix up all these assets
Result.PrimitiveId = Intermediates.Common.SceneData.PrimitiveId;
FPrimitiveSceneData PrimitiveData = GetPrimitiveData(Intermediates);
FInstanceSceneData InstanceData = GetInstanceData(Intermediates);
Result.WorldPosition = WorldPosition;
if (bIsPreviousFrame)
{
Result.PositionInstanceSpace = VertexFactoryGetPreviousInstanceSpacePosition(Input, Intermediates);
}
else
{
Result.PositionInstanceSpace = VertexFactoryGetInstanceSpacePosition(Input, Intermediates);
}
#if USE_INSTANCING
float4x4 InstanceToPrimitive = GetInstanceTransform(Intermediates);
if (bIsPreviousFrame)
{
Result.PositionPrimitiveSpace = mul(float4(WorldPosition, 1), DFFastToTranslatedWorld(PrimitiveData.PreviousWorldToLocal, ResolvedView.PrevPreViewTranslation)).xyz;
}
else
{
Result.PositionPrimitiveSpace = mul(float4(Result.PositionInstanceSpace, 1), InstanceToPrimitive).xyz;
}
Result.InstanceLocalToWorld = DFMultiply(InstanceToPrimitive, PrimitiveData.LocalToWorld);
#if NEEDS_PER_INSTANCE_PARAMS
Result.PerInstanceParams = Intermediates.PerInstanceParams;
#endif
Result.InstanceId = GetInstanceId(GetInstanceIdFromVF(Input));
Result.InstanceOffset = InstanceOffset;
Result.PrevFrameLocalToWorld = DFMultiply(GetInstancePrevTransform(Intermediates), PrimitiveData.PreviousLocalToWorld);
Result.PerInstanceRandom = GetInstanceRandom(Intermediates);
// Calculate derived world to local
{
float3 Scale2;
Scale2.x = length2(InstanceToPrimitive[0].xyz);
Scale2.y = length2(InstanceToPrimitive[1].xyz);
Scale2.z = length2(InstanceToPrimitive[2].xyz);
float3 InvNonUniformScale = rsqrt(Scale2);
float4x4 LocalToInstance = InstanceToPrimitive;
LocalToInstance[0].xyz *= Pow2(InvNonUniformScale.x);
LocalToInstance[1].xyz *= Pow2(InvNonUniformScale.y);
LocalToInstance[2].xyz *= Pow2(InvNonUniformScale.z);
LocalToInstance[3].xyz = 0.0f;
LocalToInstance = transpose(LocalToInstance);
LocalToInstance[3].xyz = mul(float4(-InstanceToPrimitive[3].xyz, 0.0f), LocalToInstance).xyz;
Result.InstanceWorldToLocal = DFMultiply(PrimitiveData.WorldToLocal, LocalToInstance);
}
#else
Result.PrevFrameLocalToWorld = InstanceData.PrevLocalToWorld;
#if USE_INSTANCE_CULLING
if (bIsPreviousFrame)
{
Result.PositionPrimitiveSpace = mul(float4(WorldPosition, 1), DFFastToTranslatedWorld(PrimitiveData.PreviousWorldToLocal, ResolvedView.PrevPreViewTranslation)).xyz;
}
else
{
Result.PositionPrimitiveSpace = mul(float4(WorldPosition, 1), DFFastToTranslatedWorld(PrimitiveData.WorldToLocal, ResolvedView.PreViewTranslation)).xyz;
}
Result.InstanceLocalToWorld = InstanceData.LocalToWorld;
Result.InstanceWorldToLocal = InstanceData.WorldToLocal;
#if NEEDS_PER_INSTANCE_PARAMS
Result.PerInstanceParams = Intermediates.PerInstanceParams;
#endif
#else
Result.PositionPrimitiveSpace = Result.PositionInstanceSpace;
#endif
#if USES_PER_INSTANCE_CUSTOM_DATA && VF_USE_PRIMITIVE_SCENE_DATA
Result.CustomDataOffset = InstanceData.CustomDataOffset;
Result.CustomDataCount = InstanceData.CustomDataCount;
#endif
Result.PerInstanceRandom = InstanceData.RandomID;
#endif
Result.VertexColor = Intermediates.Color;
// does not handle instancing!
Result.TangentToWorld = Intermediates.TangentToWorld;
Result.bEvaluateWorldPositionOffset = Intermediates.bEvaluateWorldPositionOffset;
Result.PreSkinnedPosition = Intermediates.PreSkinPosition.xyz;
#if SUPPORT_GPUSKIN_PASSTHROUGH
if (IsGPUSkinPassThrough())
{
Result.PreSkinnedNormal = GPUSkinPassThroughVFLooseParameters.PreSkinnedTangentBuffer[Input.VertexId * 2 + 1].xyz;
}
else
#endif
{
Result.PreSkinnedNormal = TangentToLocal[2]; //TangentBias(Input.TangentZ.xyz);
}
#if MANUAL_VERTEX_FETCH && NUM_MATERIAL_TEXCOORDS_VERTEX
const uint NumFetchTexCoords = LocalVF.VertexFetch_Parameters[VF_NumTexcoords_Index];
UNROLL
for (uint CoordinateIndex = 0; CoordinateIndex < NUM_MATERIAL_TEXCOORDS_VERTEX; CoordinateIndex++)
{
// Clamp coordinates to mesh's maximum as materials can request more than are available
uint ClampedCoordinateIndex = min(CoordinateIndex, NumFetchTexCoords-1);
Result.TexCoords[CoordinateIndex] = LocalVF.VertexFetch_TexCoordBuffer[NumFetchTexCoords * (LocalVF.VertexFetch_Parameters[VF_VertexOffset] + Input.VertexId) + ClampedCoordinateIndex];
}
#elif NUM_MATERIAL_TEXCOORDS_VERTEX
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 0
Result.TexCoords[0] = Input.TexCoords0.xy;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 1
Result.TexCoords[1] = Input.TexCoords0.zw;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 2
Result.TexCoords[2] = Input.TexCoords1.xy;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 3
Result.TexCoords[3] = Input.TexCoords1.zw;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 4
Result.TexCoords[4] = Input.TexCoords2.xy;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 5
Result.TexCoords[5] = Input.TexCoords2.zw;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 6
Result.TexCoords[6] = Input.TexCoords3.xy;
#endif
#if NUM_MATERIAL_TEXCOORDS_VERTEX > 7
Result.TexCoords[7] = Input.TexCoords3.zw;
#endif
#endif //MANUAL_VERTEX_FETCH && NUM_MATERIAL_TEXCOORDS_VERTEX
Result.Particle.Color = half4(1,1,1,1);
#if NEEDS_PARTICLE_LOCAL_TO_WORLD
Result.Particle.ParticleToWorld = PrimitiveData.LocalToWorld;
#endif
#if NEEDS_PARTICLE_WORLD_TO_LOCAL
Result.Particle.WorldToParticle = PrimitiveData.WorldToLocal;
#endif
#if ENABLE_NEW_HLSL_GENERATOR
EvaluateVertexMaterialAttributes(Result);
#endif
Result.LWCData = MakeMaterialLWCData(Result);
return Result;
}
float4 CalcPositionInstanceSpace(FVertexFactoryIntermediatesCommon Intermediates, float4 Position)
{
#if USE_SPLINEDEFORM && !RAYHITGROUPSHADER
// NOTE: The #if above does not include raytracing shaders because the cached position already
// has the spline deformation baked in.
return float4(SplineMeshDeformLocalPos(Intermediates.SplineMeshParams, Position.xyz), 1);
#else
return Position;
#endif
}
float4 CalcPositionPrimitiveSpace(FVertexFactoryIntermediatesCommon Intermediates, float4 Position)
{
#if USE_INSTANCING
return mul(CalcPositionInstanceSpace(Intermediates, Position), GetInstanceTransform(Intermediates));
#else
return CalcPositionInstanceSpace(Intermediates, Position);
#endif
}
half3x3 CalcTangentToLocal(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates, inout float TangentSign)
{
#if MANUAL_VERTEX_FETCH
half3 TangentInputX = LocalVF.VertexFetch_PackedTangentsBuffer[2 * (LocalVF.VertexFetch_Parameters[VF_VertexOffset] + Input.VertexId) + 0].xyz;
half4 TangentInputZ = LocalVF.VertexFetch_PackedTangentsBuffer[2 * (LocalVF.VertexFetch_Parameters[VF_VertexOffset] + Input.VertexId) + 1].xyzw;
#else
half3 TangentInputX = Input.TangentX;
half4 TangentInputZ = Input.TangentZ;
#endif
half3 TangentX = TangentInputX;
half4 TangentZ = TangentInputZ;
if (!IsGPUSkinPassThrough())
{
TangentX = TangentBias(TangentInputX);
TangentZ = TangentBias(TangentInputZ);
}
TangentSign = TangentZ.w;
#if USE_SPLINEDEFORM
// Make slice rotation matrix, and use that to transform tangents
#if RAYHITGROUPSHADER
// When raytracing, Input.Position already has the spline deformation baked in, so we need to
// go back to the original vertex buffer to compute the SliceRot matrix.
uint VertexOffset = LocalVF.VertexFetch_Parameters[VF_VertexOffset] + Input.VertexId * 3;
float3 SliceInputPos = 0;
SliceInputPos.x = LocalVF.VertexFetch_PositionBuffer[VertexOffset + 0];
SliceInputPos.y = LocalVF.VertexFetch_PositionBuffer[VertexOffset + 1];
SliceInputPos.z = LocalVF.VertexFetch_PositionBuffer[VertexOffset + 2];
#else
float3 SliceInputPos = Input.Position.xyz;
#endif
half3x3 SliceRot = SplineMeshCalcSliceRotFromLocalPos(Intermediates.Common.SplineMeshParams, SliceInputPos.xyz);
TangentX = mul(TangentX, SliceRot);
TangentZ.xyz = mul(TangentZ.xyz, SliceRot);
#endif // USE_SPLINEDEFORM
// derive the binormal by getting the cross product of the normal and tangent
half3 TangentY = cross(TangentZ.xyz, TangentX) * TangentZ.w;
// Recalculate TangentX off of the other two vectors
// This corrects quantization error since TangentX was passed in as a quantized vertex input
// The error shows up most in specular off of a mesh with a smoothed UV seam (normal is smooth, but tangents vary across the seam)
half3x3 Result;
Result[0] = cross(TangentY, TangentZ.xyz) * TangentZ.w;
Result[1] = TangentY;
Result[2] = TangentZ.xyz;
return Result;
}
half3x3 CalcTangentToWorld(FVertexFactoryIntermediates Intermediates, half3x3 TangentToLocal)
{
#if USE_INSTANCING
half3x3 InstanceToWorld = mul(GetInstanceToLocal3x3(Intermediates), DFToFloat3x3(GetInstanceData(Intermediates).LocalToWorld));
// remove scaling
InstanceToWorld[0] = normalize(InstanceToWorld[0]);
InstanceToWorld[1] = normalize(InstanceToWorld[1]);
InstanceToWorld[2] = normalize(InstanceToWorld[2]);
half3x3 TangentToWorld = mul(TangentToLocal, InstanceToWorld);
#else
half3x3 TangentToWorld = CalcTangentToWorldNoScale(Intermediates, TangentToLocal);
#endif // USE_INSTANCING
return TangentToWorld;
}
FVertexFactoryIntermediatesCommon GetVertexFactoryCommonIntermediates(FSceneDataIntermediates SceneData, FVertexFactoryInstanceInput InstanceInput)
{
FVertexFactoryIntermediatesCommon Intermediates = (FVertexFactoryIntermediatesCommon)0;
Intermediates.SceneData = SceneData;
#if USE_INSTANCING
Intermediates.InstanceInput = InstanceInput;
#endif
#if USE_SPLINEDEFORM
Intermediates.SplineMeshParams = GetSplineMeshParams(GetInstanceData(Intermediates));
#endif
return Intermediates;
}
#define LOCALVF_GET_COMMON_INTERMEDIATES(VFInput) GetVertexFactoryCommonIntermediates(VF_GPUSCENE_GET_INTERMEDIATES(VFInput), LOCALVF_GET_INSTANCE_INPUT(VFInput))
FVertexFactoryIntermediates GetVertexFactoryIntermediates(FVertexFactoryInput Input)
{
FVertexFactoryIntermediates Intermediates = (FVertexFactoryIntermediates)0;
Intermediates.Common = LOCALVF_GET_COMMON_INTERMEDIATES(Input);
FPrimitiveSceneData PrimitiveData = GetPrimitiveData(Intermediates);
FInstanceSceneData InstanceData = GetInstanceData(Intermediates);
#if USES_WORLD_POSITION_OFFSET
#if ALWAYS_EVALUATE_WORLD_POSITION_OFFSET
Intermediates.bEvaluateWorldPositionOffset = true;
#else
// Initialize this flag with culling results when applicable.
Intermediates.bEvaluateWorldPositionOffset = (Intermediates.Common.SceneData.CullingFlags & INSTANCE_CULLING_FLAG_EVALUATE_WPO) != 0;
#endif
#endif
Intermediates.IsVisible = 1.0f;
#if VF_USE_PRIMITIVE_SCENE_DATA
// Calculate the local (within the range of instance IDs belonging to a given primitive), as this can be used to load custom stuff
Intermediates.PrimitiveLocalInstanceIndex = Intermediates.Common.SceneData.InstanceId - PrimitiveData.InstanceSceneDataOffset;
#if USE_INSTANCE_CULLING
Intermediates.InstanceLightMapAndShadowMapUVBias = InstanceData.LightMapAndShadowMapUVBias;
#if USE_EDITOR_SHADERS
Intermediates.IsSelected = InstanceData.EditorData.bIsSelected ? 1.0f : 0.0f;
Intermediates.HitProxyId = float4(InstanceData.EditorData.HitProxyId, 0.0f);
#else // !USE_EDITOR_SHADERS
Intermediates.IsSelected = 0.0f;
Intermediates.HitProxyId = float4(0.0f, 0.0f, 0.0f, 0.0f);
#endif // USE_EDITOR_SHADERS
#if NEEDS_PER_INSTANCE_PARAMS
{
// This repackaging is stupid-seeming but these params are propably packed off to some interpolator or something
// PerInstanceParams.x: per-instance fade out amount
float3 InstanceTranslatedLocation = TransformLocalToTranslatedWorld(GetInstanceData(Intermediates).LocalBoundsCenter, GetInstanceData(Intermediates).LocalToWorld).xyz;
Intermediates.PerInstanceParams.x = 1.0 - saturate((length(InstanceTranslatedLocation) - InstancedVFLooseParameters.InstancingFadeOutParams.x) * InstancedVFLooseParameters.InstancingFadeOutParams.y);
// InstancingFadeOutParams.z,w are RenderSelected and RenderDeselected respectively.
// PerInstanceParams.y = hide / show flag,
Intermediates.IsVisible = lerp(InstancedVFLooseParameters.InstancingFadeOutParams.w, InstancedVFLooseParameters.InstancingFadeOutParams.z, Intermediates.IsSelected);
Intermediates.PerInstanceParams.y = Intermediates.IsVisible;
// PerInstanceParams.z dither fade cutoff
#if USE_DITHERED_LOD_TRANSITION
float RandomLOD = InstancedVFLooseParameters.InstancingViewZCompareZero.w * InstanceData.RandomID;
float ViewZZero = length(InstanceTranslatedLocation - InstancedVFLooseParameters.InstancingTranslatedWorldViewOriginZero.xyz) + RandomLOD;
float ViewZOne = length(InstanceTranslatedLocation - InstancedVFLooseParameters.InstancingTranslatedWorldViewOriginOne.xyz) + RandomLOD;
Intermediates.PerInstanceParams.z =
dot(float3(ViewZZero.xxx > InstancedVFLooseParameters.InstancingViewZCompareZero.xyz), InstancedVFLooseParameters.InstancingViewZConstant.xyz) * InstancedVFLooseParameters.InstancingTranslatedWorldViewOriginZero.w +
dot(float3(ViewZOne.xxx > InstancedVFLooseParameters.InstancingViewZCompareOne.xyz), InstancedVFLooseParameters.InstancingViewZConstant.xyz) * InstancedVFLooseParameters.InstancingTranslatedWorldViewOriginOne.w;
Intermediates.PerInstanceParams.y *= abs(Intermediates.PerInstanceParams.z) < .999;
Intermediates.IsVisible = Intermediates.PerInstanceParams.y;
#else
Intermediates.PerInstanceParams.z = 0;
#endif
// Disable WPO if this instance is not visible for dithered LOD transition or instance fade reasons
if (Intermediates.IsVisible == 0.0f)
{
Intermediates.bEvaluateWorldPositionOffset = false;
}
}
#else
Intermediates.PerInstanceParams = float4(0.f,Intermediates.IsVisible,0.f,0.f);
#endif // NEEDS_PER_INSTANCE_PARAMS
#endif // USE_INSTANCE_CULLING
#endif // VF_USE_PRIMITIVE_SCENE_DATA
#if MANUAL_VERTEX_FETCH
Intermediates.Color = LocalVF.VertexFetch_ColorComponentsBuffer[(LocalVF.VertexFetch_Parameters[VF_VertexOffset] + Input.VertexId) & LocalVF.VertexFetch_Parameters[VF_ColorIndexMask_Index]] FMANUALFETCH_COLOR_COMPONENT_SWIZZLE; // Swizzle vertex color.
#else
Intermediates.Color = Input.Color FCOLOR_COMPONENT_SWIZZLE; // Swizzle vertex color.
#endif
#if USE_INSTANCING && MANUAL_VERTEX_FETCH
uint InstanceId = GetInstanceIdFromVF(Input);
Intermediates.InstanceLightMapAndShadowMapUVBias = InstanceVF.VertexFetch_InstanceLightmapBuffer[(InstanceId + InstanceOffset)];
#elif USE_INSTANCING
Intermediates.InstanceLightMapAndShadowMapUVBias = Input.InstanceLightMapAndShadowMapUVBias;
#endif
float TangentSign = 1.0;
Intermediates.TangentToLocal = CalcTangentToLocal(Input, Intermediates, TangentSign);
Intermediates.TangentToWorld = CalcTangentToWorld(Intermediates, Intermediates.TangentToLocal);
Intermediates.TangentToWorldSign = TangentSign * GetInstanceData(Intermediates).DeterminantSign;
#if USE_INSTANCING
// GPUCULL_TODO: This can't be right
float3 InstanceTranslatedLocation = TransformLocalToTranslatedWorld(GetInstanceOrigin(Intermediates), PrimitiveData.LocalToWorld).xyz;
float InstanceViewDistance = length(InstanceTranslatedLocation);
#if NEEDS_PER_INSTANCE_PARAMS
// x = per-instance fade out factor, y = zero or one depending of if it is shown at all, z is dither cutoff
// PerInstanceParams.y stores a hide/show flag for this instance
float SelectedValue = GetInstanceSelected(Intermediates);
Intermediates.PerInstanceParams.x = 1.0 - saturate((InstanceViewDistance - InstancedVFLooseParameters.InstancingFadeOutParams.x) * InstancedVFLooseParameters.InstancingFadeOutParams.y);
// InstancingFadeOutParams.z,w are RenderSelected and RenderDeselected respectively.
Intermediates.PerInstanceParams.y = InstancedVFLooseParameters.InstancingFadeOutParams.z * SelectedValue + InstancedVFLooseParameters.InstancingFadeOutParams.w * (1-SelectedValue);
#if USE_DITHERED_LOD_TRANSITION
float RandomLOD = InstancedVFLooseParameters.InstancingViewZCompareZero.w * InstanceData.RandomID;
float ViewZZero = length(InstanceTranslatedLocation - InstancedVFLooseParameters.InstancingTranslatedWorldViewOriginZero.xyz) + RandomLOD;
float ViewZOne = length(InstanceTranslatedLocation - InstancedVFLooseParameters.InstancingTranslatedWorldViewOriginOne.xyz) + RandomLOD;
Intermediates.PerInstanceParams.z =
dot(float3(ViewZZero.xxx > InstancedVFLooseParameters.InstancingViewZCompareZero.xyz), InstancedVFLooseParameters.InstancingViewZConstant.xyz) * InstancedVFLooseParameters.InstancingTranslatedWorldViewOriginZero.w +
dot(float3(ViewZOne.xxx > InstancedVFLooseParameters.InstancingViewZCompareOne.xyz), InstancedVFLooseParameters.InstancingViewZConstant.xyz) * InstancedVFLooseParameters.InstancingTranslatedWorldViewOriginOne.w;
Intermediates.PerInstanceParams.y *= abs(Intermediates.PerInstanceParams.z) < .999;
#else
Intermediates.PerInstanceParams.z = 0;
#endif
#if USES_PER_INSTANCE_CUSTOM_DATA
// index into instance CustomData
Intermediates.PerInstanceParams.w = asfloat(GetInstanceId(GetInstanceIdFromVF(Input)) + InstanceOffset);
#endif
// Disable WPO if this instance is not visible for dithered LOD transition or instance fade reasons
if (Intermediates.PerInstanceParams.y == 0.0f)
{
Intermediates.bEvaluateWorldPositionOffset = false;
}
#else
Intermediates.PerInstanceParams = float4(1.f,Intermediates.IsVisible,0.f,0.f);
#endif // NEEDS_PER_INSTANCE_PARAMS
const float InstanceViewDistSq = Square(InstanceViewDistance);
#else
// get the "instance" view distance from the primitive bounding center
const float InstanceViewDistSq = length2(DFFastToTranslatedWorld(PrimitiveData.ObjectWorldPosition, ResolvedView.PreViewTranslation));
#endif // USE_INSTANCING
#if !USE_INSTANCE_CULLING && USES_WORLD_POSITION_OFFSET && !ALWAYS_EVALUATE_WORLD_POSITION_OFFSET && (FEATURE_LEVEL > FEATURE_LEVEL_ES3_1)
// In this case, we have to do the WPO disable distance check in the VS because it wasn't done in instance culling
if (Intermediates.bEvaluateWorldPositionOffset)
{
const bool bPrimEvalWPO = (PrimitiveData.Flags & PRIMITIVE_SCENE_DATA_FLAG_EVALUATE_WORLD_POSITION_OFFSET) != 0;
const bool bWPODisableDistance = (PrimitiveData.Flags & PRIMITIVE_SCENE_DATA_FLAG_WPO_DISABLE_DISTANCE) != 0;
if (!bPrimEvalWPO || (bWPODisableDistance && InstanceViewDistSq >= PrimitiveData.InstanceWPODisableDistanceSquared))
{
Intermediates.bEvaluateWorldPositionOffset = false;
}
}
#endif
if (IsGPUSkinPassThrough())
{
#if SUPPORT_GPUSKIN_PASSTHROUGH
#if MANUAL_VERTEX_FETCH
uint PreSkinVertexOffset = LocalVF.PreSkinBaseVertexIndex + Input.VertexId * 3;
Intermediates.PreSkinPosition.x = LocalVF.VertexFetch_PreSkinPositionBuffer[PreSkinVertexOffset + 0];
Intermediates.PreSkinPosition.y = LocalVF.VertexFetch_PreSkinPositionBuffer[PreSkinVertexOffset + 1];
Intermediates.PreSkinPosition.z = LocalVF.VertexFetch_PreSkinPositionBuffer[PreSkinVertexOffset + 2];
#else
Intermediates.PreSkinPosition = Input.PreSkinPosition.xyz;
#endif
#endif
}
else
{
Intermediates.PreSkinPosition = Input.Position.xyz;
}
return Intermediates;
}
/**
* Get the 3x3 tangent basis vectors for this vertex factory
* this vertex factory will calculate the binormal on-the-fly
*
* @param Input - vertex input stream structure
* @return 3x3 matrix
*/
half3x3 VertexFactoryGetTangentToLocal( FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates )
{
return Intermediates.TangentToLocal;
}
// @return translated world position
float4 VertexFactoryGetWorldPosition(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates)
{
FDFMatrix LocalToWorld = GetInstanceData(Intermediates).LocalToWorld;
// Scale to zero if not visible, seems a bit wild but whatever
float4 WorldPos = TransformLocalToTranslatedWorld(CalcPositionPrimitiveSpace(Intermediates.Common, Input.Position).xyz, LocalToWorld);
return WorldPos * Intermediates.IsVisible;
}
// @return local position relative to primitive
float3 VertexFactoryGetInstanceSpacePosition(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates)
{
return CalcPositionInstanceSpace(Intermediates.Common, Input.Position).xyz;
}
float4 VertexFactoryGetRasterizedWorldPosition(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates, float4 InWorldPosition)
{
return InWorldPosition;
}
float3 VertexFactoryGetPositionForVertexLighting(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates, float3 TranslatedWorldPosition)
{
return TranslatedWorldPosition;
}
FVertexFactoryInterpolantsVSToPS VertexFactoryGetInterpolantsVSToPS(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates, FMaterialVertexParameters VertexParameters)
{
FVertexFactoryInterpolantsVSToPS Interpolants;
// Initialize the whole struct to 0
// Really only the last two components of the packed UVs have the opportunity to be uninitialized
Interpolants = (FVertexFactoryInterpolantsVSToPS)0;
FInstanceSceneData InstanceData = GetInstanceData(Intermediates);
#if NUM_TEX_COORD_INTERPOLATORS
float2 CustomizedUVs[NUM_TEX_COORD_INTERPOLATORS];
GetMaterialCustomizedUVs(VertexParameters, CustomizedUVs);
GetCustomInterpolators(VertexParameters, CustomizedUVs);
UNROLL
for (int CoordinateIndex = 0; CoordinateIndex < NUM_TEX_COORD_INTERPOLATORS; CoordinateIndex++)
{
SetUV(Interpolants, CoordinateIndex, CustomizedUVs[CoordinateIndex]);
}
#elif NUM_MATERIAL_TEXCOORDS_VERTEX == 0 && USE_PARTICLE_SUBUVS
#if MANUAL_VERTEX_FETCH
SetUV(Interpolants, 0, LocalVF.VertexFetch_TexCoordBuffer[LocalVF.VertexFetch_Parameters[VF_NumTexcoords_Index] * (LocalVF.VertexFetch_Parameters[VF_VertexOffset] + Input.VertexId)]);
#else
SetUV(Interpolants, 0, Input.TexCoords0);
#endif
#endif
#if NEEDS_LIGHTMAP_COORDINATE
float2 LightMapCoordinate = 0;
float2 ShadowMapCoordinate = 0;
#if MANUAL_VERTEX_FETCH
float2 LightMapCoordinateInput = LocalVF.VertexFetch_TexCoordBuffer[LocalVF.VertexFetch_Parameters[VF_NumTexcoords_Index] * (LocalVF.VertexFetch_Parameters[VF_VertexOffset] + Input.VertexId) + LocalVF.VertexFetch_Parameters[FV_LightMapIndex_Index]];
#else
float2 LightMapCoordinateInput = Input.LightMapCoordinate;
#endif
FPrimitiveSceneData PrimitiveData = GetPrimitiveData(Intermediates);
uint LightmapDataIndex = PrimitiveData.LightmapDataIndex + LocalVF.LODLightmapDataIndex;
uint LightmapUVIndex = PrimitiveData.LightmapUVIndex;
float4 LightMapCoordinateScaleBias = VF_GPUSCENE_GET_LIGHTMAP_UV_SCALE_BIAS(Input, LightmapDataIndex);
#if USE_INSTANCING || USE_INSTANCE_CULLING
LightMapCoordinate = LightMapCoordinateInput * LightMapCoordinateScaleBias.xy + GetInstanceLightMapBias(Intermediates);
#else
LightMapCoordinate = LightMapCoordinateInput * LightMapCoordinateScaleBias.xy + LightMapCoordinateScaleBias.zw;
#endif
#if STATICLIGHTING_TEXTUREMASK
float4 ShadowMapCoordinateScaleBias = VF_GPUSCENE_GET_SHADOWMAP_UV_SCALE_BIAS(Input, LightmapDataIndex);
#if USE_INSTANCING || USE_INSTANCE_CULLING
ShadowMapCoordinate = LightMapCoordinateInput * ShadowMapCoordinateScaleBias.xy + GetInstanceShadowMapBias(Intermediates);
#else
ShadowMapCoordinate = LightMapCoordinateInput * ShadowMapCoordinateScaleBias.xy + ShadowMapCoordinateScaleBias.zw;
#endif
#endif // STATICLIGHTING_TEXTUREMASK
SetLightMapCoordinate(Interpolants, LightMapCoordinate, ShadowMapCoordinate);
SetLightmapDataIndex(Interpolants, LightmapDataIndex);
#endif // NEEDS_LIGHTMAP_COORDINATE
SetTangents(Interpolants, Intermediates.TangentToWorld[0], Intermediates.TangentToWorld[2], Intermediates.TangentToWorldSign);
SetColor(Interpolants, Intermediates.Color);
#if NEEDS_PER_INSTANCE_PARAMS
Interpolants.PerInstanceParams = Intermediates.PerInstanceParams;
#endif
#if USES_PER_INSTANCE_CUSTOM_DATA && VF_USE_PRIMITIVE_SCENE_DATA
Interpolants.CustomDataOffset = InstanceData.CustomDataOffset;
Interpolants.CustomDataCount = InstanceData.CustomDataCount;
#endif
#if NEEDS_PER_INSTANCE_RANDOM_PS
#if USE_INSTANCING
Interpolants.PerInstanceRandom = GetInstanceRandom(Intermediates);
#else
Interpolants.PerInstanceRandom = InstanceData.RandomID;
#endif
#endif
SetPrimitiveId(Interpolants, Intermediates.Common.SceneData.PrimitiveId);
#if HAS_INSTANCE_LOCAL_TO_WORLD_PS
SetInstanceLocalToWorld(Interpolants, VertexParameters.InstanceLocalToWorld);
#endif
#if HAS_INSTANCE_WORLD_TO_LOCAL_PS
SetInstanceWorldToLocal(Interpolants, VertexParameters.InstanceWorldToLocal);
#endif
return Interpolants;
}
/** X for depth-only pass */
float4 VertexFactoryGetWorldPosition(FPositionOnlyVertexFactoryInput Input)
{
FVertexFactoryIntermediatesCommon Intermediates = LOCALVF_GET_COMMON_INTERMEDIATES(Input);
FDFMatrix LocalToWorld = GetInstanceData(Intermediates).LocalToWorld;
return TransformLocalToTranslatedWorld(CalcPositionPrimitiveSpace(Intermediates, Input.Position).xyz, LocalToWorld);
}
/** for depth-only pass (slope depth bias) */
float4 VertexFactoryGetWorldPosition(FPositionAndNormalOnlyVertexFactoryInput Input)
{
FVertexFactoryIntermediatesCommon Intermediates = LOCALVF_GET_COMMON_INTERMEDIATES(Input);
FDFMatrix LocalToWorld = GetInstanceData(Intermediates).LocalToWorld;
return TransformLocalToTranslatedWorld(CalcPositionPrimitiveSpace(Intermediates, Input.Position).xyz, LocalToWorld);
}
float3 VertexFactoryGetWorldNormal(FPositionAndNormalOnlyVertexFactoryInput Input)
{
FVertexFactoryIntermediatesCommon Intermediates = LOCALVF_GET_COMMON_INTERMEDIATES(Input);
FDFMatrix LocalToWorld = GetInstanceData(Intermediates).LocalToWorld;
float3 InvScale = GetInstanceData(Intermediates).InvNonUniformScale;
float3 Normal = Input.Normal.xyz;
#if USE_INSTANCING
const float3 InstanceTransformedNormal = mul(float4(Normal, 0), GetInstanceTransform(Input)).xyz;
return RotateLocalToWorld(InstanceTransformedNormal, LocalToWorld, InvScale);
#else
return RotateLocalToWorld(Normal, LocalToWorld, InvScale);
#endif
}
float3 VertexFactoryGetWorldNormal(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates)
{
return Intermediates.TangentToWorld[2];
}
// local position relative to instance
float3 VertexFactoryGetPreviousInstanceSpacePosition(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates)
{
float4 PrevLocalPosition = Input.Position;
#if SUPPORT_GPUSKIN_PASSTHROUGH
if (IsGPUSkinPassThrough())
{
// Duplicates logic in FGPUSkinVertexFactoryShaderParameters::GetElementShaderBindings().
if (ResolvedView.FrameCounter == GPUSkinPassThroughVFLooseParameters.FrameNumber && ResolvedView.WorldIsPaused == 0)
{
uint Offset = Input.VertexId * 3;
float3 PreviousPos;
PreviousPos.x = GPUSkinPassThroughVFLooseParameters.PreviousPositionBuffer[Offset + 0];
PreviousPos.y = GPUSkinPassThroughVFLooseParameters.PreviousPositionBuffer[Offset + 1];
PreviousPos.z = GPUSkinPassThroughVFLooseParameters.PreviousPositionBuffer[Offset + 2];
PrevLocalPosition = float4(PreviousPos, 1);
}
}
else
#endif // SUPPORT_GPUSKIN_PASSTHROUGH
{
#if USE_SPLINEDEFORM && !RAYHITGROUPSHADER
// Just like CalcWorldPosition, transform into mesh space
PrevLocalPosition = float4(SplineMeshDeformLocalPos(Intermediates.Common.SplineMeshParams, Input.Position.xyz), Input.Position.w);
#endif
}
return PrevLocalPosition.xyz;
}
// @return previous translated world position
float4 VertexFactoryGetPreviousWorldPosition(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates)
{
float4 PrevLocalPosition = float4(VertexFactoryGetPreviousInstanceSpacePosition(Input, Intermediates), 1);
#if USE_INSTANCING
float4x4 InstanceTransform = GetInstancePrevTransform(Intermediates);
PrevLocalPosition = mul(Input.Position, InstanceTransform);
#endif
FDFMatrix PreviousLocalToWorld = GetInstanceData(Intermediates).PrevLocalToWorld;
return TransformPreviousLocalPositionToTranslatedWorld(PrevLocalPosition.xyz, PreviousLocalToWorld);
}
#if NEEDS_VERTEX_FACTORY_INTERPOLATION
struct FVertexFactoryRayTracingInterpolants
{
FVertexFactoryInterpolantsVSToPS InterpolantsVSToPS;
};
float2 VertexFactoryGetRayTracingTextureCoordinate( FVertexFactoryRayTracingInterpolants Interpolants )
{
#if NUM_MATERIAL_TEXCOORDS
return Interpolants.InterpolantsVSToPS.TexCoords[0].xy;
#else // #if NUM_MATERIAL_TEXCOORDS
return float2(0,0);
#endif // #if NUM_MATERIAL_TEXCOORDS
}
FVertexFactoryInterpolantsVSToPS VertexFactoryAssignInterpolants(FVertexFactoryRayTracingInterpolants Input)
{
return Input.InterpolantsVSToPS;
}
FVertexFactoryRayTracingInterpolants VertexFactoryGetRayTracingInterpolants(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates, FMaterialVertexParameters VertexParameters)
{
FVertexFactoryRayTracingInterpolants Interpolants;
Interpolants.InterpolantsVSToPS = VertexFactoryGetInterpolantsVSToPS(Input, Intermediates, VertexParameters);
return Interpolants;
}
FVertexFactoryRayTracingInterpolants VertexFactoryInterpolate(FVertexFactoryRayTracingInterpolants a, float aInterp, FVertexFactoryRayTracingInterpolants b, float bInterp)
{
// Default initialize. Otherwise, some graphics pipelines that
// couple tessellation with geometry shaders won't write to all TEXCOORD semantics,
// but read from them when <FVertexFactoryRayTracingInterpolants> is being copied as a whole.
FVertexFactoryRayTracingInterpolants O = (FVertexFactoryRayTracingInterpolants)0;
#if VF_USE_PRIMITIVE_SCENE_DATA
O.InterpolantsVSToPS.PrimitiveId = a.InterpolantsVSToPS.PrimitiveId;
#if NEEDS_LIGHTMAP_COORDINATE
O.InterpolantsVSToPS.LightmapDataIndex = a.InterpolantsVSToPS.LightmapDataIndex;
#endif
#endif
#if USES_PER_INSTANCE_CUSTOM_DATA && VF_USE_PRIMITIVE_SCENE_DATA
O.InterpolantsVSToPS.CustomDataOffset = a.InterpolantsVSToPS.CustomDataOffset;
O.InterpolantsVSToPS.CustomDataCount = a.InterpolantsVSToPS.CustomDataCount;
#endif
#if NEEDS_PER_INSTANCE_RANDOM_PS
O.InterpolantsVSToPS.PerInstanceRandom = a.InterpolantsVSToPS.PerInstanceRandom;
#endif
#if HAS_INSTANCE_LOCAL_TO_WORLD_PS
O.InterpolantsVSToPS.InstanceLocalToWorld = a.InterpolantsVSToPS.InstanceLocalToWorld;
#endif
#if HAS_INSTANCE_WORLD_TO_LOCAL_PS
O.InterpolantsVSToPS.InstanceWorldToLocal = a.InterpolantsVSToPS.InstanceWorldToLocal;
#endif
// Do we really need to interpolate TangentToWorld2 here? It should be replaced by the
// interpolated normal from 'whatever' interpolation scheme we're using
INTERPOLATE_MEMBER(InterpolantsVSToPS.TangentToWorld0.xyz);
INTERPOLATE_MEMBER(InterpolantsVSToPS.TangentToWorld2);
#if INTERPOLATE_VERTEX_COLOR
INTERPOLATE_MEMBER(InterpolantsVSToPS.Color);
#endif
#if NEEDS_PER_INSTANCE_PARAMS
INTERPOLATE_MEMBER(InterpolantsVSToPS.PerInstanceParams);
#endif
#if NEEDS_LIGHTMAP_COORDINATE
INTERPOLATE_MEMBER(InterpolantsVSToPS.LightMapCoordinate);
#endif
#if NUM_TEX_COORD_INTERPOLATORS
UNROLL
for(int tc = 0; tc < (NUM_TEX_COORD_INTERPOLATORS+1)/2; ++tc)
{
INTERPOLATE_MEMBER(InterpolantsVSToPS.TexCoords[tc]);
}
#elif USE_PARTICLE_SUBUVS
INTERPOLATE_MEMBER(InterpolantsVSToPS.TexCoords[0]);
#endif
return O;
}
#endif // #if NEEDS_VERTEX_FACTORY_INTERPOLATION
#if USE_INSTANCE_CULLING
float4 VertexFactoryGetInstanceHitProxyId(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates)
{
return Intermediates.HitProxyId;
}
#endif
#if USE_INSTANCING
float4 VertexFactoryGetInstanceHitProxyId(FVertexFactoryInput Input, FVertexFactoryIntermediates Intermediates)
{
float R = Intermediates.Common.InstanceInput.Transform1.w - 256.0 * GetInstanceSelected(Intermediates);
float G = Intermediates.Common.InstanceInput.Transform2.w;
float B = Intermediates.Common.InstanceInput.Transform3.w;
return float4(R/255.0, G/255.0, B/255.0, 0);
}
#endif // USE_INSTANCING
float4 VertexFactoryGetTranslatedPrimitiveVolumeBounds(FVertexFactoryInterpolantsVSToPS Interpolants)
{
FPrimitiveSceneData PrimitiveData = GetPrimitiveData(GetPrimitiveId(Interpolants));
return float4(DFFastToTranslatedWorld(PrimitiveData.ObjectWorldPosition, ResolvedView.PreViewTranslation), PrimitiveData.ObjectRadius);
}
uint VertexFactoryGetPrimitiveId(FVertexFactoryInterpolantsVSToPS Interpolants)
{
return GetPrimitiveId(Interpolants);
}
FSceneDataIntermediates GetSceneDataIntermediates(FVertexFactoryIntermediates Intermediates)
{
return Intermediates.Common.SceneData;
}
// We implemented GetSceneDataIntermediates ourselves
#define VF_IMPLEMENTED_GET_SCENE_DATA_INTERMEDIATES
#include "VertexFactoryDefaultInterface.ush"
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