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Diffstat (limited to 'intern/cycles/kernel/closure/bsdf_refraction.h')
| -rw-r--r-- | intern/cycles/kernel/closure/bsdf_refraction.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/intern/cycles/kernel/closure/bsdf_refraction.h b/intern/cycles/kernel/closure/bsdf_refraction.h new file mode 100644 index 00000000000..ef79d6cc259 --- /dev/null +++ b/intern/cycles/kernel/closure/bsdf_refraction.h @@ -0,0 +1,91 @@ +/* + * 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. + */ + +#ifndef __BSDF_REFRACTION_H__ +#define __BSDF_REFRACTION_H__ + +CCL_NAMESPACE_BEGIN + +/* REFRACTION */ + +__device int bsdf_refraction_setup(ShaderClosure *sc) +{ + sc->type = CLOSURE_BSDF_REFRACTION_ID; + return SD_BSDF; +} + +__device void bsdf_refraction_blur(ShaderClosure *sc, float roughness) +{ +} + +__device float3 bsdf_refraction_eval_reflect(const ShaderClosure *sc, const float3 I, const float3 omega_in, float *pdf) +{ + return make_float3(0.0f, 0.0f, 0.0f); +} + +__device float3 bsdf_refraction_eval_transmit(const ShaderClosure *sc, const float3 I, const float3 omega_in, float *pdf) +{ + return make_float3(0.0f, 0.0f, 0.0f); +} + +__device int bsdf_refraction_sample(const ShaderClosure *sc, float3 Ng, float3 I, float3 dIdx, float3 dIdy, float randu, float randv, float3 *eval, float3 *omega_in, float3 *domega_in_dx, float3 *domega_in_dy, float *pdf) +{ + float m_eta = sc->data0; + float3 N = sc->N; + + float3 R, T; +#ifdef __RAY_DIFFERENTIALS__ + float3 dRdx, dRdy, dTdx, dTdy; +#endif + bool inside; + fresnel_dielectric(m_eta, N, I, &R, &T, +#ifdef __RAY_DIFFERENTIALS__ + dIdx, dIdy, &dRdx, &dRdy, &dTdx, &dTdy, +#endif + &inside); + + if(!inside) { + *pdf = 1; + *eval = make_float3(1.0f, 1.0f, 1.0f); + *omega_in = T; +#ifdef __RAY_DIFFERENTIALS__ + *domega_in_dx = dTdx; + *domega_in_dy = dTdy; +#endif + } + return LABEL_TRANSMIT|LABEL_SINGULAR; +} + +CCL_NAMESPACE_END + +#endif /* __BSDF_REFRACTION_H__ */ + |