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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "ThinGlass.ih"
#include "common/Ray.ih"
#include "render/Material.ih"
#include "render/bsdfs/RobustThinDielectric.ih"
#include "texture/TextureParam.ih"
// c++ shared
#include "ThinGlassShared.h"
///////////////////////////////////////////////////////////////////////////////
// Implementation
OSPRAY_BEGIN_ISPC_NAMESPACE
static inline const vec3f getAttenuation(
const ThinGlass *uniform self, const DifferentialGeometry &dg)
{
vec3f attenuation =
self->attenuation + logf(make_vec3f(dg.color)) * self->attenuationScale;
if (valid(self->attenuationColorMap)) {
vec3f attenuationColor = get3f(self->attenuationColorMap, dg);
attenuation = attenuation + logf(attenuationColor) * self->attenuationScale;
}
return attenuation;
}
SYCL_EXTERNAL const varying BSDF *uniform ThinGlass_getBSDF(
const Material *uniform super,
ShadingContext *uniform ctx,
const DifferentialGeometry &dg,
const Ray &,
const Medium &,
const uniform FeatureFlagsHandler &)
{
const ThinGlass *uniform self = (const ThinGlass *uniform)super;
varying linear3f *uniform shadingframe =
LinearSpace3f_create(ctx, frame(dg.Ns));
varying BSDF *uniform bsdf = RobustThinDielectric_create(
ctx, shadingframe, self->eta, getAttenuation(self, dg));
bsdf->bsdfType = BSDF_TYPE_THINGLASS;
return bsdf;
}
SYCL_EXTERNAL vec3f ThinGlass_getTransparency(const Material *uniform material,
const DifferentialGeometry &dg,
const Ray &ray,
const Medium &,
const uniform FeatureFlagsHandler &)
{
const ThinGlass *uniform self = (const ThinGlass *uniform)material;
float cosThetaO = max(-dot(ray.dir, dg.Ns), 0.0f);
return RobustThinDielectric_getTransparency(
cosThetaO, self->eta, getAttenuation(self, dg));
}
SYCL_EXTERNAL BSDF_SampleRes ThinGlass_BSDF_sample(
const varying BSDF *uniform super,
const vec3f &wo,
const vec2f &s,
float ss)
{
return RobustThinDielectric_sample(super, wo, s, ss);
}
///////////////////////////////////////////////////////////////////////////////
// External API
export void *uniform ThinGlass_getBSDF_addr()
{
return (void *uniform)ThinGlass_getBSDF;
}
export void *uniform ThinGlass_getTransparency_addr()
{
return (void *uniform)ThinGlass_getTransparency;
}
OSPRAY_END_ISPC_NAMESPACE
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