forked from bartvdbraak/blender
fe09b24e86
Each BSDF node now has a Normal input, which can be used to set a custom normal for the BSDF, for example if you want to have only bump on one of the layers in a multilayer material. The Bump node can be used to generate a normal from a scalar value, the same as what happens when you connect a scalar value to the displacement output. Documentation has been updated with the latest changes: http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes Patch by Agustin Benavidez, some implementation tweaks by me.
103 lines
3.3 KiB
C
103 lines
3.3 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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#ifndef __BSDF_REFRACTION_H__
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#define __BSDF_REFRACTION_H__
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CCL_NAMESPACE_BEGIN
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/* REFRACTION */
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typedef struct BsdfRefractionClosure {
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float m_eta;
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} BsdfRefractionClosure;
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__device void bsdf_refraction_setup(ShaderData *sd, ShaderClosure *sc, float eta)
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{
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sc->data0 = eta;
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sc->type = CLOSURE_BSDF_REFRACTION_ID;
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sd->flag |= SD_BSDF;
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}
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__device void bsdf_refraction_blur(ShaderClosure *sc, float roughness)
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{
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}
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__device float3 bsdf_refraction_eval_reflect(const ShaderData *sd, const ShaderClosure *sc, const float3 I, const float3 omega_in, float *pdf)
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{
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return make_float3(0.0f, 0.0f, 0.0f);
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}
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__device float3 bsdf_refraction_eval_transmit(const ShaderData *sd, const ShaderClosure *sc, const float3 I, const float3 omega_in, float *pdf)
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{
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return make_float3(0.0f, 0.0f, 0.0f);
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}
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__device float bsdf_refraction_albedo(const ShaderData *sd, const ShaderClosure *sc, const float3 I)
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{
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return 1.0f;
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}
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__device int bsdf_refraction_sample(const ShaderData *sd, const ShaderClosure *sc, float randu, float randv, float3 *eval, float3 *omega_in, float3 *domega_in_dx, float3 *domega_in_dy, float *pdf)
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{
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float m_eta = sc->data0;
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float3 m_N = sc->N;
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float3 R, T;
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#ifdef __RAY_DIFFERENTIALS__
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float3 dRdx, dRdy, dTdx, dTdy;
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#endif
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bool inside;
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fresnel_dielectric(m_eta, m_N, sd->I, &R, &T,
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#ifdef __RAY_DIFFERENTIALS__
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sd->dI.dx, sd->dI.dy, &dRdx, &dRdy, &dTdx, &dTdy,
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#endif
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&inside);
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if(!inside) {
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*pdf = 1;
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*eval = make_float3(1.0f, 1.0f, 1.0f);
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*omega_in = T;
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#ifdef __RAY_DIFFERENTIALS__
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*domega_in_dx = dTdx;
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*domega_in_dy = dTdy;
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#endif
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}
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return LABEL_TRANSMIT|LABEL_SINGULAR;
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}
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CCL_NAMESPACE_END
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#endif /* __BSDF_REFRACTION_H__ */
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