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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "common/FeatureFlags.ih"
#include "common/OSPCommon.ih"
#include "render/pathtracer/Scattering.ih"
#include "rkcommon/math/LinearSpace.ih"
OSPRAY_BEGIN_ISPC_NAMESPACE
// keep interface of BSDFs the same
typedef Scattering_EvalRes BSDF_EvalRes;
typedef Scattering_SampleRes BSDF_SampleRes;
typedef Scattering_Type BSDFScatteringType;
#define BSDF_SPECULAR_REFLECTION SCATTERING_SPECULAR_REFLECTION
#define BSDF_GLOSSY_REFLECTION SCATTERING_GLOSSY_REFLECTION
#define BSDF_DIFFUSE_REFLECTION SCATTERING_DIFFUSE_REFLECTION
#define BSDF_SPECULAR_TRANSMISSION SCATTERING_SPECULAR_TRANSMISSION
#define BSDF_GLOSSY_TRANSMISSION SCATTERING_GLOSSY_TRANSMISSION
#define BSDF_DIFFUSE_TRANSMISSION SCATTERING_DIFFUSE_TRANSMISSION
#define BSDF_DIFFUSE SCATTERING_DIFFUSE
#define BSDF_GLOSSY SCATTERING_GLOSSY
#define BSDF_SPECULAR SCATTERING_SPECULAR
#define BSDF_REFLECTION SCATTERING_REFLECTION
#define BSDF_TRANSMISSION SCATTERING_TRANSMISSION
#define BSDF_SMOOTH SCATTERING_SMOOTH
#define BSDF_NONE SCATTERING_NONE
#define BSDF_ALL SCATTERING_ALL
enum BSDFType
{
BSDF_TYPE_UNKNOWN,
BSDF_TYPE_OBJ,
BSDF_TYPE_THINGLASS,
BSDF_TYPE_GLASS,
BSDF_TYPE_LUMINOUS,
BSDF_TYPE_METAL,
BSDF_TYPE_METAL_ROUGH,
BSDF_TYPE_METALLICPAINT,
BSDF_TYPE_MIX,
BSDF_TYPE_CARPAINT,
BSDF_TYPE_PRINCIPLED,
BSDF_TYPE_ALLOY,
BSDF_TYPE_ALLOY_ROUGH,
BSDF_TYPE_PLASTIC,
BSDF_TYPE_VELVET,
BSDF_TYPE_CONDUCTOR,
BSDF_TYPE_DIELECTRIC,
BSDF_TYPE_DIELECTRIC_LAYER,
BSDF_TYPE_LAMBERT,
BSDF_TYPE_LAMBERT_TRANSMISSION,
BSDF_TYPE_MICROFACET_CONDUCTOR,
BSDF_TYPE_MICROFACET_DIELECTRIC,
BSDF_TYPE_MICROFACET_DIELECTRIC_LAYER,
BSDF_TYPE_MICROFACET_SHEEN_LAYER,
BSDF_TYPE_MINNEART,
BSDF_TYPE_MULTI_BSDF,
BSDF_TYPE_OREN_NAYAR,
BSDF_TYPE_SPECULAR,
BSDF_TYPE_SCALE,
BSDF_TYPE_REFLECTION,
BSDF_TYPE_ROBUST_DIELECTRIC,
BSDF_TYPE_ROBUST_THIN_DIELECTRIC,
BSDF_TYPE_THIN_DIELECTRIC,
BSDF_TYPE_THIN_MICROFACET_DIELECTRIC,
BSDF_TYPE_TRANSMISSION,
BSDF_TYPE_VELVETY
};
inline BSDF_EvalRes make_BSDF_EvalRes_zero()
{
BSDF_EvalRes res;
res.value = make_vec3f(0.0f);
res.pdf = 0.0f;
return res;
}
inline BSDF_SampleRes make_BSDF_SampleRes_zero()
{
BSDF_SampleRes res;
res.weight = make_vec3f(0.0f);
return res;
}
struct BSDF
{
varying vec3f albedo;
varying BSDFScatteringType scatteringType;
uniform BSDFType bsdfType;
const varying linear3f *uniform frame;
};
inline void BSDF_Constructor(varying BSDF *uniform self,
varying vec3f albedo,
varying BSDFScatteringType scatteringType,
uniform BSDFType bsdfType,
const varying linear3f *uniform frame)
{
self->albedo = albedo;
self->scatteringType = scatteringType;
self->bsdfType = bsdfType;
self->frame = frame;
}
inline vec3f getN(const varying BSDF *uniform bsdf)
{
return bsdf->frame->vz;
}
inline linear3f getFrame(const varying BSDF *uniform bsdf)
{
return *bsdf->frame;
}
SYCL_EXTERNAL BSDF_EvalRes BSDF_dispatch_eval(const varying BSDF *uniform self,
const vec3f &wo,
const vec3f &wi,
const uniform FeatureFlagsHandler &ffh);
SYCL_EXTERNAL BSDF_SampleRes BSDF_dispatch_sample(
const varying BSDF *uniform self,
const vec3f &wo,
const vec2f &s,
float ss,
const uniform FeatureFlagsHandler &ffh);
OSPRAY_END_ISPC_NAMESPACE
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