Hlsl bxdfs 3

include/nbl/builtin/hlsl/bxdf/bxdf_traits.hlsl

@@ -0,0 +1,107 @@
+// Copyright (C) 2018-2025 - DevSH Graphics Programming Sp. z O.O.
+// This file is part of the "Nabla Engine".
+// For conditions of distribution and use, see copyright notice in nabla.h
+#ifndef _NBL_BUILTIN_HLSL_BXDF_TRAITS_INCLUDED_
+#define _NBL_BUILTIN_HLSL_BXDF_TRAITS_INCLUDED_
+
+#include "nbl/builtin/hlsl/bxdf/common.hlsl"
+#include "nbl/builtin/hlsl/bxdf/reflection.hlsl"
+#include "nbl/builtin/hlsl/bxdf/transmission.hlsl"
+
+namespace nbl
+{
+namespace hlsl
+{
+namespace bxdf
+{
+
+enum BxDFType : uint16_t
+{
+    BT_BSDF = 0,
+    BT_BRDF,
+    BT_BTDF
+};
+
+template<typename BxdfT>
+struct traits;
+
+template<typename L, typename I, typename A, typename S>
+struct traits<bxdf::reflection::SLambertianBxDF<L, I, A, S> >
+{
+    NBL_CONSTEXPR_STATIC_INLINE BxDFType type = BT_BRDF;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotV = false;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotL = true;
+};
+
+template<typename L, typename I, typename A, typename S>
+struct traits<bxdf::reflection::SOrenNayarBxDF<L, I, A, S> >
+{
+    NBL_CONSTEXPR_STATIC_INLINE BxDFType type = BT_BRDF;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotV = true;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotL = true;
+};
+
+// no blinn phong
+
+template<typename L, typename I, typename A, typename IC, typename AC, typename S>
+struct traits<bxdf::reflection::SBeckmannBxDF<L, I, A, IC, AC, S> >
+{
+    NBL_CONSTEXPR_STATIC_INLINE BxDFType type = BT_BRDF;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotV = true;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotL = true;
+};
+
+template<typename L, typename I, typename A, typename IC, typename AC, typename S>
+struct traits<bxdf::reflection::SGGXBxDF<L, I, A, IC, AC, S> >
+{
+    NBL_CONSTEXPR_STATIC_INLINE BxDFType type = BT_BRDF;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotV = true;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotL = true;
+};
+
+
+template<typename L, typename I, typename A, typename S>
+struct traits<bxdf::transmission::SLambertianBxDF<L, I, A, S> >
+{
+    NBL_CONSTEXPR_STATIC_INLINE BxDFType type = BT_BSDF;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotV = false;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotL = true;
+};
+
+template<typename L, typename I, typename A, typename IC, typename AC, typename S>
+struct traits<bxdf::transmission::SSmoothDielectricBxDF<L, I, A, IC, AC, S, false> >
+{
+    NBL_CONSTEXPR_STATIC_INLINE BxDFType type = BT_BSDF;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotV = true;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotL = true;
+};
+
+template<typename L, typename I, typename A, typename IC, typename AC, typename S>
+struct traits<bxdf::transmission::SSmoothDielectricBxDF<L, I, A, IC, AC, S, true> >
+{
+    NBL_CONSTEXPR_STATIC_INLINE BxDFType type = BT_BSDF;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotV = true;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotL = true;
+};
+
+template<typename L, typename I, typename A, typename IC, typename AC, typename S>
+struct traits<bxdf::transmission::SBeckmannDielectricBxDF<L, I, A, IC, AC, S> >
+{
+    NBL_CONSTEXPR_STATIC_INLINE BxDFType type = BT_BSDF;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotV = true;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotL = true;
+};
+
+template<typename L, typename I, typename A, typename IC, typename AC, typename S>
+struct traits<bxdf::transmission::SGGXDielectricBxDF<L, I, A, IC, AC, S> >
+{
+    NBL_CONSTEXPR_STATIC_INLINE BxDFType type = BT_BSDF;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotV = true;
+    NBL_CONSTEXPR_STATIC_INLINE bool clampNdotL = true;
+};
+
+}
+}
+}
+
+#endif