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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "MetallicPaint.ih"
#include "render/Material.ih"
#include "render/bsdfs/DielectricLayer.ih"
#include "render/bsdfs/Lambert.ih"
#include "render/bsdfs/MicrofacetConductor.ih"
#include "render/bsdfs/MultiBSDF.ih"
#include "texture/TextureParam.ih"
// c++ shared
#include "MetallicPaintShared.h"
///////////////////////////////////////////////////////////////////////////////
// Implementation
OSPRAY_BEGIN_ISPC_NAMESPACE
struct MetallicPaint_MultiBSDF
{
DEFINE_MULTIBSDF(2);
BSDF lambert;
MicrofacetConductor microfacetConductor;
};
struct MetallicPaint_BSDF
{
DielectricLayer dielectricLayer;
MetallicPaint_MultiBSDF multi;
};
SYCL_EXTERNAL const varying BSDF *uniform MetallicPaint_getBSDF(
const uniform Material *uniform super,
uniform ShadingContext *uniform ctx,
const DifferentialGeometry &dg,
const Ray &,
const Medium &,
const uniform FeatureFlagsHandler &)
{
const uniform MetallicPaint *uniform self =
(const uniform MetallicPaint *uniform)super;
varying LinearSpace3f *uniform shadingFrame =
LinearSpace3f_create(ctx, frame(dg.Ns));
// Allocate memory and initialize material BSDF
varying MetallicPaint_BSDF *uniform bsdf =
(varying MetallicPaint_BSDF * uniform)
ShadingContext_alloc(ctx, sizeof(MetallicPaint_BSDF));
varying MultiBSDF *uniform bsdfMulti =
(varying MultiBSDF * uniform) & bsdf->multi;
MultiBSDF_Constructor(bsdfMulti, 2);
const vec3f color = self->baseColor * make_vec3f(dg.color)
* get3f(self->baseColorMap, dg, make_vec3f(1.f));
Lambert_Constructor(&bsdf->multi.lambert, shadingFrame, color);
MultiBSDF_add(bsdfMulti, 0, &bsdf->multi.lambert, 1.f, luminance(color));
if (self->flakeAmount > 0.f) {
const vec3f r = self->flakeColor;
const vec3f g = make_vec3f(self->flakeAmount);
Fresnel *uniform fresnel = FresnelSchlick_create(ctx, r, g);
MicrofacetConductor_Constructor(&bsdf->multi.microfacetConductor,
super->microfacetAlbedoTables,
shadingFrame,
fresnel,
self->flakeSpread,
0.f);
MultiBSDF_add(bsdfMulti,
1,
(varying BSDF * uniform) & bsdf->multi.microfacetConductor,
1.f,
luminance(r));
}
DielectricLayer_Constructor(&bsdf->dielectricLayer,
shadingFrame,
&bsdf->multi.super,
self->eta,
make_vec3f(1.0f),
1.0f,
1.0f);
bsdf->dielectricLayer.super.bsdfType = BSDF_TYPE_METALLICPAINT;
return &bsdf->dielectricLayer.super;
}
inline BSDF_EvalRes MultiBSDF_eval(
const varying BSDF *uniform super, const vec3f &wo, const vec3f &wi)
{
const varying MetallicPaint_MultiBSDF *uniform self =
(const varying MetallicPaint_MultiBSDF *uniform)super;
MULTIBSDF_EVAL_BEGIN();
MULTIBSDF_EVAL_CHILD(0, &self->lambert, Lambert_eval);
MULTIBSDF_EVAL_CHILD(1, &self->microfacetConductor, MicrofacetConductor_eval);
MULTIBSDF_EVAL_END();
return MULTIBSDF_EVAL_GET();
}
inline BSDF_SampleRes MultiBSDF_sample(const varying BSDF *uniform super,
const vec3f &wo,
const vec2f &s,
float ss)
{
const varying MetallicPaint_MultiBSDF *uniform self =
(const varying MetallicPaint_MultiBSDF *uniform)super;
MULTIBSDF_SAMPLE_BEGIN();
MULTIBSDF_SAMPLE_CHILD(0, &self->lambert, Lambert_sample);
MULTIBSDF_SAMPLE_CHILD(
1, &self->microfacetConductor, MicrofacetConductor_sample);
MULTIBSDF_SAMPLE_EVAL();
MULTIBSDF_EVAL_CHILD(0, &self->lambert, Lambert_eval);
MULTIBSDF_EVAL_CHILD(1, &self->microfacetConductor, MicrofacetConductor_eval);
MULTIBSDF_SAMPLE_END();
return MULTIBSDF_SAMPLE_GET();
}
SYCL_EXTERNAL BSDF_EvalRes MetallicPaint_BSDF_eval(
const varying BSDF *uniform super, const vec3f &wo, const vec3f &wi)
{
const varying MetallicPaint_BSDF *uniform self =
(const varying MetallicPaint_BSDF *uniform)super;
DIELECTRICLAYER_EVAL(self->dielectricLayer,
self->multi.super.scatteringType,
&self->multi.super,
MultiBSDF_eval);
return DIELECTRICLAYER_EVAL_GET();
}
SYCL_EXTERNAL BSDF_SampleRes MetallicPaint_BSDF_sample(
const varying BSDF *uniform super,
const vec3f &wo,
const vec2f &s,
float ss)
{
const varying MetallicPaint_BSDF *uniform self =
(const varying MetallicPaint_BSDF *uniform)super;
DIELECTRICLAYER_SAMPLE(self->dielectricLayer,
self->multi.super.scatteringType,
&self->multi.super,
MultiBSDF_sample);
return DIELECTRICLAYER_SAMPLE_GET();
}
///////////////////////////////////////////////////////////////////////////////
// External API
export void *uniform MetallicPaint_getBSDF_addr()
{
return (void *uniform)MetallicPaint_getBSDF;
}
OSPRAY_END_ISPC_NAMESPACE
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