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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "Glass.ih"
#include "Medium.ih"
#include "common/Ray.ih"
#include "render/Material.ih"
#include "render/bsdfs/RobustDielectric.ih"
// c++ shared
#include "GlassShared.h"
///////////////////////////////////////////////////////////////////////////////
// Implementation
OSPRAY_BEGIN_ISPC_NAMESPACE
SYCL_EXTERNAL const varying BSDF *uniform Glass_getBSDF(
const uniform Material *uniform super,
uniform ShadingContext *uniform ctx,
const DifferentialGeometry &dg,
const Ray &,
const Medium ¤tMedium,
const uniform FeatureFlagsHandler &)
{
uniform const Glass *uniform self = (uniform const Glass *uniform)super;
float eta = eq(currentMedium, self->mediumOutside)
? self->mediumOutside.ior * rcp(self->mediumInside.ior)
: self->mediumInside.ior * rcp(self->mediumOutside.ior);
varying BSDF *uniform bsdf = RobustDielectric_create(ctx, dg, eta);
bsdf->bsdfType = BSDF_TYPE_GLASS;
return bsdf;
}
SYCL_EXTERNAL vec3f Glass_getTransparency(
const uniform Material *uniform material,
const DifferentialGeometry &dg,
const Ray &ray,
const Medium ¤tMedium,
const uniform FeatureFlagsHandler &)
{
const uniform Glass *uniform self = (const uniform Glass *uniform)material;
float eta = eq(currentMedium, self->mediumOutside)
? self->mediumOutside.ior * rcp(self->mediumInside.ior)
: self->mediumInside.ior * rcp(self->mediumOutside.ior);
float cosThetaO = max(-dot(ray.dir, dg.Ns), 0.0f);
return make_vec3f(1.0f - fresnelDielectric(cosThetaO, eta));
}
SYCL_EXTERNAL void Glass_selectNextMedium(const uniform Material *uniform super,
const DifferentialGeometry &,
Medium ¤tMedium)
{
const uniform Glass *uniform self = (const uniform Glass *uniform)super;
if (eq(currentMedium, self->mediumOutside))
currentMedium = self->mediumInside;
else
currentMedium = self->mediumOutside;
}
SYCL_EXTERNAL BSDF_SampleRes Glass_BSDF_sample(
const varying BSDF *uniform super,
const vec3f &wo,
const vec2f &s,
float ss)
{
return RobustDielectric_sample(super, wo, s, ss);
}
///////////////////////////////////////////////////////////////////////////////
// External API
export void *uniform Glass_getBSDF_addr()
{
return (void *uniform)Glass_getBSDF;
}
export void *uniform Glass_getTransparency_addr()
{
return (void *uniform)Glass_getTransparency;
}
export void *uniform Glass_selectNextMedium_addr()
{
return (void *uniform)Glass_selectNextMedium;
}
OSPRAY_END_ISPC_NAMESPACE
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