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Merge branch 'forward-software-refl' of https://github.com/HydrogenC/FlaxEngine into HydrogenC-forward-software-refl

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Wojtek Figat
2024-08-05 19:04:28 +02:00
parent 63147ee0a9 a5b00fa718
commit a49fc1c5d1
10 changed files with 183 additions and 11 deletions
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19
Content/Editor/MaterialTemplates/Features/ForwardShading.hlsl
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@@ -67,6 +67,7 @@ void PS_Forward(
gBuffer.Color = material.Color;
gBuffer.Specular = material.Specular;
gBuffer.AO = material.AO;
// gBuffer.ViewPos is the view space position of the pixel
gBuffer.ViewPos = mul(float4(materialInput.WorldPosition, 1), ViewMatrix).xyz;
#if MATERIAL_SHADING_MODEL == SHADING_MODEL_SUBSURFACE
gBuffer.CustomData = float4(material.SubsurfaceColor, material.Opacity);
@@ -125,6 +126,24 @@ void PS_Forward(
float3 screenColor = sceneColorTexture.SampleLevel(SamplerPointClamp, hit.xy, 0).rgb;
reflections = lerp(reflections, screenColor, hit.z);
}
// Fallback to software tracing if possible
#if USE_GLOBAL_SURFACE_ATLAS && CAN_USE_GLOBAL_SURFACE_ATLAS
// If hit.z >= 0.9f then skip sdf tracing
if (hit.z < 0.9f)
{
// Don't use temporal effect in forward pass
float3 reflectWS = ScreenSpaceReflectionDirection(screenUV, gBuffer, ViewPos);
float4 surfaceAtlas;
if(TraceSDFSoftwareReflections(gBuffer, reflectWS, surfaceAtlas)){
float3 screenColor = sceneColorTexture.SampleLevel(SamplerPointClamp, hit.xy, 0).rgb;
reflections = lerp(surfaceAtlas, float4(screenColor, 1), hit.z);
}
}
#endif
#endif
light.rgb += reflections * GetReflectionSpecularLighting(ViewPos, gBuffer) * light.a;

39
Content/Editor/MaterialTemplates/Features/SDFReflections.hlsl Normal file
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@@ -0,0 +1,39 @@
// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
@0// SDF Reflections: Defines
#define USE_GLOBAL_SURFACE_ATLAS 1
@1// SDF Reflections: Includes
#include "./Flax/GlobalSignDistanceField.hlsl"
#include "./Flax/GI/GlobalSurfaceAtlas.hlsl"
@2// SDF Reflections: Constants
GlobalSDFData GlobalSDF;
GlobalSurfaceAtlasData GlobalSurfaceAtlas;
@3// SDF Reflections: Resources
Texture3D<float> GlobalSDFTex : register(t__SRV__);
Texture3D<float> GlobalSDFMip : register(t__SRV__);
ByteAddressBuffer GlobalSurfaceAtlasChunks : register(t__SRV__);
ByteAddressBuffer RWGlobalSurfaceAtlasCulledObjects : register(t__SRV__);
Buffer<float4> GlobalSurfaceAtlasObjects : register(t__SRV__);
Texture2D GlobalSurfaceAtlasDepth : register(t__SRV__);
Texture2D GlobalSurfaceAtlasTex : register(t__SRV__);
@4// SDF Reflections: Utilities
bool TraceSDFSoftwareReflections(GBufferSample gBuffer, float3 reflectWS, out float4 surfaceAtlas)
{
GlobalSDFTrace sdfTrace;
float maxDistance = GLOBAL_SDF_WORLD_SIZE;
float selfOcclusionBias = GlobalSDF.CascadeVoxelSize[0];
sdfTrace.Init(gBuffer.WorldPos + gBuffer.Normal * selfOcclusionBias, reflectWS, 0.0f, maxDistance);
GlobalSDFHit sdfHit = RayTraceGlobalSDF(GlobalSDF, GlobalSDFTex, GlobalSDFMip, sdfTrace);
if (sdfHit.IsHit())
{
float3 hitPosition = sdfHit.GetHitPosition(sdfTrace);
float surfaceThreshold = GetGlobalSurfaceAtlasThreshold(GlobalSDF, sdfHit);
surfaceAtlas = SampleGlobalSurfaceAtlas(GlobalSurfaceAtlas, GlobalSurfaceAtlasChunks, RWGlobalSurfaceAtlasCulledObjects, GlobalSurfaceAtlasObjects, GlobalSurfaceAtlasDepth, GlobalSurfaceAtlasTex, hitPosition, -reflectWS, surfaceThreshold);
return true;
}
return false;
}
@5// SDF Reflections: Shaders