fix microfacet bxdf concept

Author: keptsecret

include/nbl/builtin/hlsl/bxdf/common.hlsl

@@ -957,7 +957,7 @@ NBL_CONCEPT_END(
     ((NBL_CONCEPT_REQ_TYPE_ALIAS_CONCEPT)(bxdf_common_typdefs, T))
     ((NBL_CONCEPT_REQ_TYPE)(T::anisocache_type))
     ((NBL_CONCEPT_REQ_EXPR_RET_TYPE)((bxdf.eval(_sample, aniso, anisocache)), ::nbl::hlsl::is_same_v, typename T::spectral_type))
-    ((NBL_CONCEPT_REQ_EXPR_RET_TYPE)((bxdf.pdf(aniso, anisocache)), ::nbl::hlsl::is_same_v, typename T::scalar_type))
+    ((NBL_CONCEPT_REQ_EXPR_RET_TYPE)((bxdf.pdf(_sample, aniso, anisocache)), ::nbl::hlsl::is_same_v, typename T::scalar_type))
     ((NBL_CONCEPT_REQ_EXPR_RET_TYPE)((bxdf.quotient_and_pdf(_sample, aniso, anisocache)), ::nbl::hlsl::is_same_v, typename T::quotient_pdf_type))
     ((NBL_CONCEPT_REQ_TYPE_ALIAS_CONCEPT)(LightSample, typename T::sample_type))
     ((NBL_CONCEPT_REQ_TYPE_ALIAS_CONCEPT)(concepts::FloatingPointLikeVectorial, typename T::spectral_type))
@@ -987,7 +987,7 @@ NBL_CONCEPT_END(
     ((NBL_CONCEPT_REQ_TYPE)(T::isotropic_interaction_type))
     ((NBL_CONCEPT_REQ_TYPE)(T::isocache_type))
     ((NBL_CONCEPT_REQ_EXPR_RET_TYPE)((bxdf.eval(_sample, iso, isocache)), ::nbl::hlsl::is_same_v, typename T::spectral_type))
-    ((NBL_CONCEPT_REQ_EXPR_RET_TYPE)((bxdf.pdf(iso, isocache)), ::nbl::hlsl::is_same_v, typename T::scalar_type))
+    ((NBL_CONCEPT_REQ_EXPR_RET_TYPE)((bxdf.pdf(_sample, iso, isocache)), ::nbl::hlsl::is_same_v, typename T::scalar_type))
     ((NBL_CONCEPT_REQ_EXPR_RET_TYPE)((bxdf.quotient_and_pdf(_sample, iso, isocache)), ::nbl::hlsl::is_same_v, typename T::quotient_pdf_type))
     ((NBL_CONCEPT_REQ_TYPE_ALIAS_CONCEPT)(surface_interactions::Isotropic, typename T::isotropic_interaction_type))
     ((NBL_CONCEPT_REQ_TYPE_ALIAS_CONCEPT)(CreatableIsotropicMicrofacetCache, typename T::isocache_type))