forked from bartvdbraak/blender
eaf493d323
* Added Westin Sheen and Westin Backscatter closures for testing, useful for Cloth like effects. Only available via OSL, added an example OSL shader to the Templates (Text Editor).
178 lines
5.4 KiB
C++
178 lines
5.4 KiB
C++
/*
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* Adapted from Open Shading Language with this license:
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*
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* Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
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* All Rights Reserved.
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*
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* Modifications Copyright 2011, Blender Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Sony Pictures Imageworks nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <OpenImageIO/fmath.h>
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#include <OSL/genclosure.h>
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#include "osl_closures.h"
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#include "kernel_types.h"
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#include "kernel_montecarlo.h"
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#include "closure/bsdf_westin.h"
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CCL_NAMESPACE_BEGIN
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using namespace OSL;
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/* WESTIN BACKSCATTER */
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class WestinBackscatterClosure : public CBSDFClosure {
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public:
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WestinBackscatterClosure() : CBSDFClosure(LABEL_GLOSSY) {}
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size_t memsize() const { return sizeof(*this); }
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const char *name() const { return "westin_backscatter"; }
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void setup()
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{
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sc.prim = this;
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m_shaderdata_flag = bsdf_westin_backscatter_setup(&sc);
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}
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bool mergeable(const ClosurePrimitive *other) const
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{
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return false;
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}
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void blur(float roughness)
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{
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bsdf_westin_backscatter_blur(&sc, roughness);
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}
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void print_on(std::ostream &out) const
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{
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out << name() << " ((" << sc.N[0] << ", " << sc.N[1] << ", " << sc.N[2] << "))";
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}
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float3 eval_reflect(const float3 &omega_out, const float3 &omega_in, float& pdf) const
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{
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return bsdf_westin_backscatter_eval_reflect(&sc, omega_out, omega_in, &pdf);
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}
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float3 eval_transmit(const float3 &omega_out, const float3 &omega_in, float& pdf) const
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{
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return bsdf_westin_backscatter_eval_transmit(&sc, omega_out, omega_in, &pdf);
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}
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int sample(const float3 &Ng,
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const float3 &omega_out, const float3 &domega_out_dx, const float3 &domega_out_dy,
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float randu, float randv,
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float3 &omega_in, float3 &domega_in_dx, float3 &domega_in_dy,
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float &pdf, float3 &eval) const
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{
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return bsdf_westin_backscatter_sample(&sc, Ng, omega_out, domega_out_dx, domega_out_dy,
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randu, randv, &eval, &omega_in, &domega_in_dx, &domega_in_dy, &pdf);
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}
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};
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ClosureParam *closure_westin_backscatter_params()
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{
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static ClosureParam params[] = {
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CLOSURE_FLOAT3_PARAM(WestinBackscatterClosure, sc.N),
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CLOSURE_FLOAT_PARAM(WestinBackscatterClosure, sc.data0),
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CLOSURE_STRING_KEYPARAM("label"),
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CLOSURE_FINISH_PARAM(WestinBackscatterClosure)
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};
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return params;
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}
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CLOSURE_PREPARE(closure_westin_backscatter_prepare, WestinBackscatterClosure)
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/* WESTIN SHEEN */
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class WestinSheenClosure : public CBSDFClosure {
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public:
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WestinSheenClosure() : CBSDFClosure(LABEL_DIFFUSE) {}
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size_t memsize() const { return sizeof(*this); }
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const char *name() const { return "westin_sheen"; }
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void setup()
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{
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sc.prim = this;
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m_shaderdata_flag = bsdf_westin_sheen_setup(&sc);
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}
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bool mergeable(const ClosurePrimitive *other) const
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{
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return false;
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}
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void blur(float roughness)
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{
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bsdf_westin_sheen_blur(&sc, roughness);
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}
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void print_on(std::ostream &out) const
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{
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out << name() << " ((" << sc.N[0] << ", " << sc.N[1] << ", " << sc.N[2] << "))";
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}
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float3 eval_reflect(const float3 &omega_out, const float3 &omega_in, float& pdf) const
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{
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return bsdf_westin_sheen_eval_reflect(&sc, omega_out, omega_in, &pdf);
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}
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float3 eval_transmit(const float3 &omega_out, const float3 &omega_in, float& pdf) const
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{
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return bsdf_westin_sheen_eval_transmit(&sc, omega_out, omega_in, &pdf);
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}
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int sample(const float3 &Ng,
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const float3 &omega_out, const float3 &domega_out_dx, const float3 &domega_out_dy,
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float randu, float randv,
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float3 &omega_in, float3 &domega_in_dx, float3 &domega_in_dy,
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float &pdf, float3 &eval) const
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{
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return bsdf_westin_sheen_sample(&sc, Ng, omega_out, domega_out_dx, domega_out_dy,
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randu, randv, &eval, &omega_in, &domega_in_dx, &domega_in_dy, &pdf);
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}
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};
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ClosureParam *closure_westin_sheen_params()
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{
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static ClosureParam params[] = {
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CLOSURE_FLOAT3_PARAM(WestinSheenClosure, sc.N),
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CLOSURE_FLOAT_PARAM(WestinSheenClosure, sc.data0),
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CLOSURE_STRING_KEYPARAM("label"),
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CLOSURE_FINISH_PARAM(WestinSheenClosure)
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};
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return params;
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}
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CLOSURE_PREPARE(closure_westin_sheen_prepare, WestinSheenClosure)
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CCL_NAMESPACE_END
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