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 SecondaryTextures.cginc
+/// @brief Secondary set of textures.
+/////////////////////////////////////////////////////////////////////////////////
+
+#ifndef ALLOY_SHADERS_FEATURE_SECONDARY_TEXTURES_CGINC
+#define ALLOY_SHADERS_FEATURE_SECONDARY_TEXTURES_CGINC
+
+#ifdef A_SECONDARY_TEXTURES_ON
+    #ifndef A_METALLIC_ON
+        #define A_METALLIC_ON
+    #endif
+
+    #ifndef A_SPECULAR_TINT_ON
+        #define A_SPECULAR_TINT_ON
+    #endif
+
+    #if !defined(A_AMBIENT_OCCLUSION_ON) && !defined(A_ROUGHNESS_SOURCE_BASE_COLOR_ALPHA)
+        #define A_AMBIENT_OCCLUSION_ON
+    #endif
+#endif
+
+#include "Assets/Alloy/Shaders/Framework/Feature.cginc"
+
+#ifdef A_SECONDARY_TEXTURES_ON
+    /// The secondary tint color.
+    /// Expects a linear LDR color with alpha.
+    half4 _Color2;
+    
+    /// The secondary color map.
+    /// Expects an RGB(A) map with sRGB sampling.
+    A_SAMPLER_2D(_MainTex2);
+
+    /// The secondary packed material map.
+    /// Expects an RGBA data map.
+    sampler2D _MaterialMap2;
+
+    /// The secondary normal map.
+    /// Expects a compressed normal map.
+    sampler2D _BumpMap2;
+    
+    /// Toggles tinting the secondary color by the vertex color.
+    /// Expects values in the range [0,1].
+    half _BaseColorVertexTint2;
+
+    /// The secondary metallic scale.
+    /// Expects values in the range [0,1].
+    half _Metallic2;
+
+    /// The secondary specularity scale.
+    /// Expects values in the range [0,1].
+    half _Specularity2;
+
+    // Amount that f0 is tinted by the base color.
+    /// Expects values in the range [0,1].
+    half _SpecularTint2;
+
+    /// The secondary roughness scale.
+    /// Expects values in the range [0,1].
+    half _Roughness2;
+    
+    /// Ambient Occlusion strength.
+    /// Expects values in the range [0,1].
+    half _Occlusion2;
+
+    /// Normal map XY scale.
+    half _BumpScale2;
+#endif
+
+void aSecondaryTextures(
+    inout ASurface s)
+{
+#ifdef A_SECONDARY_TEXTURES_ON
+    ASplatContext sc = aNewSplatContext(s, 1.0h, 1.0f);
+    ASplat sp = aNewSplat(sc, A_SAMPLER_2D_INPUT(_MainTex2), _MaterialMap2, _BumpMap2, _Color2, _BaseColorVertexTint2, _Metallic2, _Specularity2, _SpecularTint2, _Roughness2, _Occlusion2, _BumpScale2);
+
+    #ifdef A_SECONDARY_TEXTURES_ALPHA_BLEND_OFF
+        aBlendSplat(s, sp);
+    #else
+        aBlendSplatWithOpacity(s, sp);
+    #endif
+
+    // NOTE: These are applied in here so we can use baseUv2.
+    float2 baseUv = s.baseUv;
+
+    s.baseUv = A_BV(s, sp.baseUv);
+    aEmission2(s);
+    aRim2(s);
+    s.baseUv = A_BV(s, baseUv);
+#endif
+}
+
+#endif // ALLOY_SHADERS_FEATURE_SECONDARY_TEXTURES_CGINC