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Packages/com.waveharmonic.crest/Runtime/Shaders/Surface/Fog.hlsl

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+// Crest Water System
+// Copyright © 2024 Wave Harmonic. All rights reserved.
+
+#ifndef d_WaveHarmonic_Crest_SurfaceFog
+#define d_WaveHarmonic_Crest_SurfaceFog
+
+#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Macros.hlsl"
+#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Settings.Crest.hlsl"
+
+#define d_Crest_WaterSurface 1
+
+#if (CREST_LEGACY_UNDERWATER != 1)
+#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Volume/Graph/IntegrateWaterVolume.hlsl"
+#endif
+
+m_CrestNameSpace
+
+#if (CREST_LEGACY_UNDERWATER != 0)
+static bool s_IsUnderWater;
+#endif
+
+void SetUpFog(bool i_Underwater, float3 i_PositionWS, float i_Multiplier, float i_FogDistance, half3 i_ViewWS, float2 i_PositionSS)
+{
+    s_IsUnderWater = i_Underwater;
+
+#if (CREST_LEGACY_UNDERWATER != 1)
+    s_PositionSS = i_PositionSS;
+    s_PositionWS = i_PositionWS;
+    s_ViewWS = i_ViewWS;
+    s_FogDistance = i_FogDistance;
+    s_DepthRaw = 0;
+    s_FogMultiplier = i_Multiplier;
+#endif
+}
+
+m_CrestNameSpaceEnd
+
+#if (CREST_LEGACY_UNDERWATER != 0)
+#if (CREST_DISCARD_ATMOSPHERIC_SCATTERING != 0)
+
+#if CREST_BIRP
+#ifdef UNITY_PASS_FORWARDADD
+#define m_Unity_FogColor fixed4(0, 0, 0, 0)
+#else
+#define m_Unity_FogColor unity_FogColor
+#endif // UNITY_PASS_FORWARDADD
+
+#undef UNITY_APPLY_FOG
+#define UNITY_APPLY_FOG(coord, color) \
+if (!m_Crest::s_IsUnderWater) \
+{ \
+    UNITY_APPLY_FOG_COLOR(coord, color, m_Unity_FogColor); \
+}
+#endif // CREST_BIRP
+
+#if CREST_HDRP
+#define EvaluateAtmosphericScattering(i, V, color) m_Crest::s_IsUnderWater ? color : EvaluateAtmosphericScattering(i, V, color)
+#endif
+
+#if CREST_URP
+#define MixFog(color, coord) m_Crest::s_IsUnderWater ? color : MixFog(color, coord)
+#endif
+
+#endif // CREST_DISCARD_ATMOSPHERIC_SCATTERING
+#endif // CREST_LEGACY_UNDERWATER
+
+#endif // d_WaveHarmonic_Crest_SurfaceFog