You've already forked UnrealEngineUWP
mirror of
https://github.com/izzy2lost/UnrealEngineUWP.git
synced 2026-03-26 18:15:20 -07:00
1722da7465
- Raytracing shadows/reflections/AO/GI/etc and path tracer now work in large worlds. - Updated parts of Lumen using raytracing to work in large worlds. - This change doesn't not address (all) GPU Lightmass issues in large worlds. Changes: - Build TLAS with instances in translated world space. - Move ray origin to translated world space. - Updated raytracing shaders to use translated world space (most LWCHackToFloat in these shaders are now gone). - Store gather points positions in translated world space. - Removed unused RayTracingDynamicMeshVS(...) #rb Yuriy.ODonnell, Patrick.Kelly, chris.kulla, rob.krajcarski #jira UE-140558 #preflight 620bb3ff4353dc61c7f51e64 [CL 18995354 by tiago costa in ue5-main branch]
87 lines
2.8 KiB
Plaintext
87 lines
2.8 KiB
Plaintext
// Copyright Epic Games, Inc. All Rights Reserved.
|
|
|
|
#pragma once
|
|
|
|
|
|
#if RAYCALLABLESHADER || RAYGENSHADER || RAYHITGROUPSHADER || RAYMISSSHADER
|
|
# define SHADER_PARAMETERS_HAS_SOURCETEXTURE 1
|
|
#else
|
|
# define SHADER_PARAMETERS_HAS_SOURCETEXTURE 0
|
|
#endif
|
|
|
|
// Mirrors FLightShaderParameters on C++ side.
|
|
struct FLightShaderParameters
|
|
{
|
|
float3 TranslatedWorldPosition;
|
|
float InvRadius;
|
|
float3 Color;
|
|
float FalloffExponent;
|
|
float3 Direction;
|
|
float3 Tangent;
|
|
float2 SpotAngles;
|
|
float SpecularScale;
|
|
float SourceRadius;
|
|
float SoftSourceRadius;
|
|
float SourceLength;
|
|
float RectLightBarnCosAngle;
|
|
float RectLightBarnLength;
|
|
#if SHADER_PARAMETERS_HAS_SOURCETEXTURE
|
|
Texture2D SourceTexture;
|
|
#endif
|
|
};
|
|
|
|
|
|
/** Returns the full width and height of the rect light */
|
|
float2 GetRectLightDimensions(FLightShaderParameters LightParameters)
|
|
{
|
|
return 2.0 * float2(LightParameters.SourceRadius, LightParameters.SourceLength);
|
|
}
|
|
|
|
/** Returns the tangents to use respectively for GetRectLightDimensions() X and Y. */
|
|
void GetRectLightTangents(FLightShaderParameters LightParameters, out float3 Tangent, out float3 BiTangent)
|
|
{
|
|
Tangent = cross(LightParameters.Tangent, LightParameters.Direction);
|
|
BiTangent = LightParameters.Tangent;
|
|
}
|
|
|
|
// Parameters feed through FLightShaderParameters used directly as SHADER_PARAMETER_STRUCT() in a shader's root parameter structure.
|
|
float3 Light_TranslatedWorldPosition;
|
|
float Light_InvRadius;
|
|
float3 Light_Color;
|
|
float Light_FalloffExponent;
|
|
float3 Light_Direction;
|
|
float3 Light_Tangent;
|
|
float2 Light_SpotAngles;
|
|
float Light_SpecularScale;
|
|
float Light_SourceRadius;
|
|
float Light_SoftSourceRadius;
|
|
float Light_SourceLength;
|
|
float Light_RectLightBarnCosAngle;
|
|
float Light_RectLightBarnLength;
|
|
Texture2D Light_SourceTexture;
|
|
|
|
|
|
/** Returns the FLightShaderParameters from the root shader parameters. */
|
|
FLightShaderParameters GetRootLightShaderParameters()
|
|
{
|
|
// Hopefully one day the shader compiler will be so nice we would no longer have to do this.
|
|
FLightShaderParameters LightParameters;
|
|
LightParameters.TranslatedWorldPosition = Light_TranslatedWorldPosition;
|
|
LightParameters.InvRadius = Light_InvRadius;
|
|
LightParameters.Color = Light_Color;
|
|
LightParameters.FalloffExponent = Light_FalloffExponent;
|
|
LightParameters.Direction = Light_Direction;
|
|
LightParameters.Tangent = Light_Tangent;
|
|
LightParameters.SpotAngles = Light_SpotAngles;
|
|
LightParameters.SpecularScale = Light_SpecularScale;
|
|
LightParameters.SourceRadius = Light_SourceRadius;
|
|
LightParameters.SoftSourceRadius = Light_SoftSourceRadius;
|
|
LightParameters.SourceLength = Light_SourceLength;
|
|
LightParameters.RectLightBarnCosAngle = Light_RectLightBarnCosAngle;
|
|
LightParameters.RectLightBarnLength = Light_RectLightBarnLength;
|
|
#if SHADER_PARAMETERS_HAS_SOURCETEXTURE
|
|
LightParameters.SourceTexture = Light_SourceTexture;
|
|
#endif
|
|
return LightParameters;
|
|
}
|