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/*
* Adapted from Open Shading Language with this license:
*
* Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
* All Rights Reserved.
*
* Modifications Copyright 2011, Blender Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Sony Pictures Imageworks nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <OpenImageIO/fmath.h>
#include <OSL/genclosure.h>
#include "osl_closures.h"
#include "kernel_types.h"
#include "kernel_montecarlo.h"
#include "closure/bsdf_westin.h"
CCL_NAMESPACE_BEGIN
using namespace OSL;
/* WESTIN BACKSCATTER */
class WestinBackscatterClosure : public CBSDFClosure {
public:
WestinBackscatterClosure() : CBSDFClosure(LABEL_GLOSSY) {}
size_t memsize() const { return sizeof(*this); }
const char *name() const { return "westin_backscatter"; }
void setup()
{
sc.prim = this;
m_shaderdata_flag = bsdf_westin_backscatter_setup(&sc);
}
bool mergeable(const ClosurePrimitive *other) const
{
return false;
}
void blur(float roughness)
{
bsdf_westin_backscatter_blur(&sc, roughness);
}
void print_on(std::ostream &out) const
{
out << name() << " ((" << sc.N[0] << ", " << sc.N[1] << ", " << sc.N[2] << "))";
}
float3 eval_reflect(const float3 &omega_out, const float3 &omega_in, float& pdf) const
{
return bsdf_westin_backscatter_eval_reflect(&sc, omega_out, omega_in, &pdf);
}
float3 eval_transmit(const float3 &omega_out, const float3 &omega_in, float& pdf) const
{
return bsdf_westin_backscatter_eval_transmit(&sc, omega_out, omega_in, &pdf);
}
int sample(const float3 &Ng,
const float3 &omega_out, const float3 &domega_out_dx, const float3 &domega_out_dy,
float randu, float randv,
float3 &omega_in, float3 &domega_in_dx, float3 &domega_in_dy,
float &pdf, float3 &eval) const
{
return bsdf_westin_backscatter_sample(&sc, Ng, omega_out, domega_out_dx, domega_out_dy,
randu, randv, &eval, &omega_in, &domega_in_dx, &domega_in_dy, &pdf);
}
};
ClosureParam *closure_westin_backscatter_params()
{
static ClosureParam params[] = {
CLOSURE_FLOAT3_PARAM(WestinBackscatterClosure, sc.N),
CLOSURE_FLOAT_PARAM(WestinBackscatterClosure, sc.data0),
CLOSURE_STRING_KEYPARAM("label"),
CLOSURE_FINISH_PARAM(WestinBackscatterClosure)
};
return params;
}
CLOSURE_PREPARE(closure_westin_backscatter_prepare, WestinBackscatterClosure)
/* WESTIN SHEEN */
class WestinSheenClosure : public CBSDFClosure {
public:
WestinSheenClosure() : CBSDFClosure(LABEL_DIFFUSE) {}
size_t memsize() const { return sizeof(*this); }
const char *name() const { return "westin_sheen"; }
void setup()
{
sc.prim = this;
m_shaderdata_flag = bsdf_westin_sheen_setup(&sc);
}
bool mergeable(const ClosurePrimitive *other) const
{
return false;
}
void blur(float roughness)
{
bsdf_westin_sheen_blur(&sc, roughness);
}
void print_on(std::ostream &out) const
{
out << name() << " ((" << sc.N[0] << ", " << sc.N[1] << ", " << sc.N[2] << "))";
}
float3 eval_reflect(const float3 &omega_out, const float3 &omega_in, float& pdf) const
{
return bsdf_westin_sheen_eval_reflect(&sc, omega_out, omega_in, &pdf);
}
float3 eval_transmit(const float3 &omega_out, const float3 &omega_in, float& pdf) const
{
return bsdf_westin_sheen_eval_transmit(&sc, omega_out, omega_in, &pdf);
}
int sample(const float3 &Ng,
const float3 &omega_out, const float3 &domega_out_dx, const float3 &domega_out_dy,
float randu, float randv,
float3 &omega_in, float3 &domega_in_dx, float3 &domega_in_dy,
float &pdf, float3 &eval) const
{
return bsdf_westin_sheen_sample(&sc, Ng, omega_out, domega_out_dx, domega_out_dy,
randu, randv, &eval, &omega_in, &domega_in_dx, &domega_in_dy, &pdf);
}
};
ClosureParam *closure_westin_sheen_params()
{
static ClosureParam params[] = {
CLOSURE_FLOAT3_PARAM(WestinSheenClosure, sc.N),
CLOSURE_FLOAT_PARAM(WestinSheenClosure, sc.data0),
CLOSURE_STRING_KEYPARAM("label"),
CLOSURE_FINISH_PARAM(WestinSheenClosure)
};
return params;
}
CLOSURE_PREPARE(closure_westin_sheen_prepare, WestinSheenClosure)
CCL_NAMESPACE_END
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