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345666d77f
Removed bSupportsVolumetricFog from DDPI #jira UE-157201 #rb Dmitriy.Dyomin #preflight 64119df15819afacaff56035 [CL 24652571 by Florin Pascu in ue5-main branch]
87 lines
3.2 KiB
Plaintext
87 lines
3.2 KiB
Plaintext
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "Common.ush"
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// Reroute MobileSceneTextures uniform buffer references to the base pass uniform buffer
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#define MobileSceneTextures MobileBasePass.SceneTextures
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#define FogStruct MobileBasePass.Fog
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#include "SceneTexturesCommon.ush"
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#include "HeightFogCommon.ush"
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#include "SkyAtmosphereCommon.ush"
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float StartDepthZ;
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void MobileFogVS(
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in float2 InPosition : ATTRIBUTE0,
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out float2 OutTexCoord : TEXCOORD0,
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out float3 OutScreenVector : TEXCOORD1,
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out float4 OutPosition : SV_POSITION
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)
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{
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ResolvedView = ResolveView();
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// screenspace position from vb
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OutPosition = float4(InPosition,StartDepthZ,1);
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// texture coord from vb
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OutTexCoord = InPosition * ResolvedView.ScreenPositionScaleBias.xy + ResolvedView.ScreenPositionScaleBias.wz;
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// deproject to world space
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OutScreenVector = mul(float4(InPosition,1,0), ResolvedView.ScreenToTranslatedWorld).xyz;
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}
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void MobileFogPS(
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float2 TexCoord : TEXCOORD0,
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float3 ScreenVector : TEXCOORD1,
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float4 SVPos : SV_POSITION,
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out float4 OutColor : SV_Target0
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)
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{
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ResolvedView = ResolveView();
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half4 FinalFog = half4(0,0,0,1);
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float SceneDepth = CalcSceneDepth(TexCoord);
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float3 WorldPositionRelativeToCamera = ScreenVector.xyz * SceneDepth;
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float3 WorldPosition = WorldPositionRelativeToCamera + ResolvedView.TranslatedWorldCameraOrigin - LWCHackToFloat(ResolvedView.PreViewTranslation);
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// at least one of these is active
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#if PERMUTATION_SUPPORT_HEIGHT_FOG
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FinalFog = CalculateHeightFog(WorldPositionRelativeToCamera);
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#endif
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#if PERMUTATION_SUPPORT_VOLUMETRIC_FOG
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if (FogStruct.ApplyVolumetricFog > 0)
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{
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const uint EyeIndex = 0;
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float3 VolumeUV = ComputeVolumeUV(LWCPromote(WorldPosition), ResolvedView.WorldToClip);
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FinalFog = CombineVolumetricFog(FinalFog, VolumeUV, EyeIndex, SceneDepth);
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}
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#endif
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#if PERMUTATION_SUPPORT_AERIAL_PERSPECTIVE
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if (ResolvedView.SkyAtmosphereApplyCameraAerialPerspectiveVolume > 0.0f)
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{
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// float4 NDCPosition = LWCMultiply(MakeLWCVector4(WorldPosition, 1.0f), PrimaryView.WorldToClip); // LWC_TODO: MakeLWCVector4 seems broken
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float4 NDCPosition = LWCMultiply(LWCPromote(float4(WorldPosition, 1.0f)), PrimaryView.WorldToClip); // Using LWCPromote make the math work as expected.
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// Sample the aerial perspective (AP). It is also blended under the VertexFog parameter.
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FinalFog = GetAerialPerspectiveLuminanceTransmittanceWithFogOver(
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ResolvedView.RealTimeReflectionCapture,
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ResolvedView.SkyAtmosphereCameraAerialPerspectiveVolumeSizeAndInvSize,
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NDCPosition,
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(WorldPositionRelativeToCamera.xyz - ResolvedView.TranslatedWorldCameraOrigin) * CM_TO_SKY_UNIT,
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View.CameraAerialPerspectiveVolume,
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View.CameraAerialPerspectiveVolumeSampler,
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ResolvedView.SkyAtmosphereCameraAerialPerspectiveVolumeDepthResolutionInv,
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ResolvedView.SkyAtmosphereCameraAerialPerspectiveVolumeDepthResolution,
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ResolvedView.SkyAtmosphereAerialPerspectiveStartDepthKm,
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ResolvedView.SkyAtmosphereCameraAerialPerspectiveVolumeDepthSliceLengthKm,
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ResolvedView.SkyAtmosphereCameraAerialPerspectiveVolumeDepthSliceLengthKmInv,
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ResolvedView.OneOverPreExposure,
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FinalFog);
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}
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#endif// PERMUTATION_SUPPORT_AERIAL_PERSPECTIVE
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FinalFog.rgb *= ResolvedView.PreExposure;
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OutColor = RETURN_COLOR(half4(FinalFog.rgb, FinalFog.w));
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}
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