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Initial commit for forward software reflection

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ExMatics HydrogenC
2024-06-17 23:00:48 +08:00
parent 2676daabf1
commit 5f939430ee
4 changed files with 62 additions and 4 deletions
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Content/Editor/MaterialTemplates/Features/ForwardShading.hlsl
+42
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@@ -9,6 +9,10 @@
#define MATERIAL_REFLECTIONS_SSR 1
#if MATERIAL_REFLECTIONS == MATERIAL_REFLECTIONS_SSR
#include "./Flax/SSR.hlsl"
#if USE_GLOBAL_SURFACE_ATLAS
#include "./Flax/GlobalSignDistanceField.hlsl"
#include "./Flax/GI/GlobalSurfaceAtlas.hlsl"
#endif
#endif
#endif
#include "./Flax/Lighting.hlsl"
@@ -27,12 +31,23 @@ LightData LocalLights[MAX_LOCAL_LIGHTS];
TextureCube EnvProbe : register(t__SRV__);
TextureCube SkyLightTexture : register(t__SRV__);
Texture2DArray DirectionalLightShadowMap : register(t__SRV__);
#if USE_GLOBAL_SURFACE_ATLAS
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__);
#endif
@4// Forward Shading: Utilities
DECLARE_LIGHTSHADOWDATA_ACCESS(DirectionalLightShadow);
@5// Forward Shading: Shaders
// Pixel Shader function for Forward Pass
META_PS(USE_FORWARD, FEATURE_LEVEL_ES2)
META_PERMUTATION_1(USE_GLOBAL_SURFACE_ATLAS=0)
META_PERMUTATION_1(USE_GLOBAL_SURFACE_ATLAS=1)
void PS_Forward(
in PixelInput input
,out float4 output : SV_Target0
@@ -125,6 +140,33 @@ 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, gBufferData.ViewPos);
GlobalSDFTrace sdfTrace;
float maxDistance = 100000;
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);
float4 surfaceAtlas = SampleGlobalSurfaceAtlas(GlobalSurfaceAtlas, GlobalSurfaceAtlasChunks, RWGlobalSurfaceAtlasCulledObjects, GlobalSurfaceAtlasObjects, GlobalSurfaceAtlasDepth, GlobalSurfaceAtlasTex, hitPosition, -reflectWS, surfaceThreshold);
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;