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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "Velvet.ih"
#include "render/Material.ih"
#include "render/bsdfs/Minneart.ih"
#include "render/bsdfs/MultiBSDF.ih"
#include "render/bsdfs/Velvety.ih"
// c++ shared
#include "VelvetShared.h"
///////////////////////////////////////////////////////////////////////////////
// Implementation
OSPRAY_BEGIN_ISPC_NAMESPACE
#define MULTIBSDF_SIZE 2
struct Velvet_BSDF
{
DEFINE_MULTIBSDF(MULTIBSDF_SIZE);
Minneart minneart;
Velvety velvety;
};
SYCL_EXTERNAL const varying BSDF *uniform Velvet_getBSDF(
const uniform Material *uniform super,
uniform ShadingContext *uniform ctx,
const DifferentialGeometry &dg,
const Ray &,
const Medium &,
const uniform FeatureFlagsHandler &)
{
const uniform Velvet *uniform self = (const uniform Velvet *uniform)super;
varying LinearSpace3f *uniform shadingFrame =
LinearSpace3f_create(ctx, frame(dg.Ns));
// Allocate memory and initialize material BSDF
varying Velvet_BSDF *uniform bsdf = (varying Velvet_BSDF * uniform)
ShadingContext_alloc(ctx, sizeof(Velvet_BSDF));
varying MultiBSDF *uniform mbsdf = (varying MultiBSDF * uniform) bsdf;
MultiBSDF_Constructor(mbsdf, MULTIBSDF_SIZE);
bsdf->super.bsdfType = BSDF_TYPE_VELVET;
Minneart_Constructor(
&bsdf->minneart, shadingFrame, self->reflectance, self->backScattering);
MultiBSDF_add(
mbsdf, 0, &bsdf->minneart.super, 1.f, luminance(self->reflectance));
Velvety_Constructor(&bsdf->velvety,
shadingFrame,
self->horizonScatteringColor,
self->horizonScatteringFallOff);
MultiBSDF_add(mbsdf,
1,
&bsdf->velvety.super,
1.f,
luminance(self->horizonScatteringColor));
return &bsdf->super;
}
SYCL_EXTERNAL BSDF_EvalRes Velvet_BSDF_eval(
const varying BSDF *uniform super, const vec3f &wo, const vec3f &wi)
{
const varying Velvet_BSDF *uniform self =
(const varying Velvet_BSDF *uniform)super;
MULTIBSDF_EVAL_BEGIN();
MULTIBSDF_EVAL_CHILD(0, &self->minneart, Minneart_eval);
MULTIBSDF_EVAL_CHILD(1, &self->velvety, Velvety_eval);
MULTIBSDF_EVAL_END();
return MULTIBSDF_EVAL_GET();
}
SYCL_EXTERNAL BSDF_SampleRes Velvet_BSDF_sample(
const varying BSDF *uniform super,
const vec3f &wo,
const vec2f &s,
float ss)
{
const varying Velvet_BSDF *uniform self =
(const varying Velvet_BSDF *uniform)super;
MULTIBSDF_SAMPLE_BEGIN();
MULTIBSDF_SAMPLE_CHILD(0, &self->minneart, Minneart_sample);
MULTIBSDF_SAMPLE_CHILD(1, &self->velvety, Velvety_sample);
MULTIBSDF_SAMPLE_EVAL();
MULTIBSDF_EVAL_CHILD(0, &self->minneart, Minneart_eval);
MULTIBSDF_EVAL_CHILD(1, &self->velvety, Velvety_eval);
MULTIBSDF_SAMPLE_END();
return MULTIBSDF_SAMPLE_GET();
}
///////////////////////////////////////////////////////////////////////////////
// External API
export void *uniform Velvet_getBSDF_addr()
{
return (void *uniform)Velvet_getBSDF;
}
OSPRAY_END_ISPC_NAMESPACE
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