Initial commit

2026-06-03 04:34:26 -07:00 · 2022-01-22 20:13:49 -08:00
parent f9d23e5bcf
commit 687473573d
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+// Alloy Physical Shader Framework
+// Copyright 2013-2017 RUST LLC.
+// http://www.alloy.rustltd.com/
+
+///////////////////////////////////////////////////////////////////////////////
+/// @file Volumetric.cginc
+/// @brief Volumetric fog, light shafts, etc implementations.
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef ALLOY_SHADERS_FRAMEWORK_VOLUMETRIC_IMPL_CGINC
+#define ALLOY_SHADERS_FRAMEWORK_VOLUMETRIC_IMPL_CGINC
+
+#include "Assets/Alloy/Shaders/Config.cginc"
+#include "Assets/Alloy/Shaders/Framework/Volumetric.cginc"
+
+#include "UnityShaderVariables.cginc"
+
+#ifdef A_VOLUMETRIC_PASS
+    #if defined(VAPOR_TRANSLUCENT_FOG_ON)
+        #ifndef A_POSITION_WORLD_ON
+            #define A_POSITION_WORLD_ON
+        #endif
+    #elif defined(VTRANSPARENCY_ON)
+        #ifndef A_SCREEN_UV_ON
+            #define A_SCREEN_UV_ON
+        #endif
+        
+        #ifndef A_VIEW_DEPTH_ON
+            #define A_VIEW_DEPTH_ON
+        #endif
+    #endif
+
+    #if !defined(A_FOG_ON) && (defined(FOG_LINEAR) || defined(FOG_EXP) || defined(FOG_EXP2))
+        #define A_FOG_ON
+    #endif
+#endif
+
+void aVolumetricBase(
+    inout half4 color,
+    ASurface s)
+{
+#ifdef A_VOLUMETRIC_PASS
+    UNITY_APPLY_FOG_COLOR(s.fogCoord, color, unity_FogColor);
+
+    #if defined(VAPOR_TRANSLUCENT_FOG_ON)
+        color = VaporApplyFog(s.positionWorld, color);
+    #elif defined(VTRANSPARENCY_ON)
+        float4 data = s.screenPosition;
+
+        data.z = s.viewDepth;
+        color = VolumetricTransparencyBase(color, data);
+    #endif
+#endif
+}
+
+void aVolumetricAdd(
+    inout half4 color,
+    ASurface s)
+{
+#ifdef A_VOLUMETRIC_PASS
+    UNITY_APPLY_FOG_COLOR(s.fogCoord, color, A_BLACK4);
+
+    #if defined(VAPOR_TRANSLUCENT_FOG_ON)
+        color = VaporApplyFogAdd(s.positionWorld, color);
+    #elif defined(VTRANSPARENCY_ON)
+        float4 data = s.screenPosition;
+
+        data.z = s.viewDepth;
+        color = VolumetricTransparencyAdd(color, data);
+    #endif
+#endif
+}
+
+void aVolumetricMultiply(
+    inout half4 color,
+    ASurface s)
+{
+#ifdef A_VOLUMETRIC_PASS
+    UNITY_APPLY_FOG_COLOR(s.fogCoord, color, A_WHITE4);
+
+    #if defined(VAPOR_TRANSLUCENT_FOG_ON)
+        color = VaporApplyFogFade(s.positionWorld, color, A_WHITE);
+    #elif defined(VTRANSPARENCY_ON)
+//        float4 data = s.screenPosition;
+//
+//        data.z = s.viewDepth;
+//        color = VolumetricTransparencyAdd(color, data);
+    #endif
+#endif
+}
+
+#endif // ALLOY_SHADERS_FRAMEWORK_VOLUMETRIC_IMPL_CGINC