forked from bartvdbraak/blender
463 lines
17 KiB
C
463 lines
17 KiB
C
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "kernel/closure/bsdf_ashikhmin_velvet.h"
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#include "kernel/closure/bsdf_diffuse.h"
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#include "kernel/closure/bsdf_oren_nayar.h"
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#include "kernel/closure/bsdf_phong_ramp.h"
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#include "kernel/closure/bsdf_diffuse_ramp.h"
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#include "kernel/closure/bsdf_microfacet.h"
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#include "kernel/closure/bsdf_microfacet_multi.h"
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#include "kernel/closure/bsdf_reflection.h"
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#include "kernel/closure/bsdf_refraction.h"
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#include "kernel/closure/bsdf_transparent.h"
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#include "kernel/closure/bsdf_ashikhmin_shirley.h"
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#include "kernel/closure/bsdf_toon.h"
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#include "kernel/closure/bsdf_hair.h"
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#include "kernel/closure/bsdf_principled_diffuse.h"
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#include "kernel/closure/bsdf_principled_sheen.h"
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#ifdef __SUBSURFACE__
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# include "kernel/closure/bssrdf.h"
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#endif
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#ifdef __VOLUME__
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# include "kernel/closure/volume.h"
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#endif
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CCL_NAMESPACE_BEGIN
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ccl_device_forceinline int bsdf_sample(KernelGlobals *kg,
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ShaderData *sd,
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const ShaderClosure *sc,
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float randu,
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float randv,
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float3 *eval,
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float3 *omega_in,
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differential3 *domega_in,
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float *pdf)
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{
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int label;
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switch(sc->type) {
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case CLOSURE_BSDF_DIFFUSE_ID:
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case CLOSURE_BSDF_BSSRDF_ID:
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label = bsdf_diffuse_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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#ifdef __SVM__
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case CLOSURE_BSDF_OREN_NAYAR_ID:
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label = bsdf_oren_nayar_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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#ifdef __OSL__
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case CLOSURE_BSDF_PHONG_RAMP_ID:
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label = bsdf_phong_ramp_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_DIFFUSE_RAMP_ID:
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label = bsdf_diffuse_ramp_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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#endif
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case CLOSURE_BSDF_TRANSLUCENT_ID:
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label = bsdf_translucent_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_REFLECTION_ID:
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label = bsdf_reflection_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_REFRACTION_ID:
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label = bsdf_refraction_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_TRANSPARENT_ID:
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label = bsdf_transparent_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_MICROFACET_GGX_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_FRESNEL_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_CLEARCOAT_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_ANISO_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_ANISO_FRESNEL_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
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label = bsdf_microfacet_ggx_sample(kg, sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID:
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_FRESNEL_ID:
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label = bsdf_microfacet_multi_ggx_sample(kg, sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf, &sd->lcg_state);
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break;
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID:
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_FRESNEL_ID:
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label = bsdf_microfacet_multi_ggx_glass_sample(kg, sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf, &sd->lcg_state);
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break;
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case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
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case CLOSURE_BSDF_MICROFACET_BECKMANN_ANISO_ID:
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case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
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label = bsdf_microfacet_beckmann_sample(kg, sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
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case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ANISO_ID:
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label = bsdf_ashikhmin_shirley_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
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label = bsdf_ashikhmin_velvet_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_DIFFUSE_TOON_ID:
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label = bsdf_diffuse_toon_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_GLOSSY_TOON_ID:
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label = bsdf_glossy_toon_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_HAIR_REFLECTION_ID:
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label = bsdf_hair_reflection_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_HAIR_TRANSMISSION_ID:
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label = bsdf_hair_transmission_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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#ifdef __PRINCIPLED__
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case CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID:
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case CLOSURE_BSDF_BSSRDF_PRINCIPLED_ID:
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label = bsdf_principled_diffuse_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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case CLOSURE_BSDF_PRINCIPLED_SHEEN_ID:
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label = bsdf_principled_sheen_sample(sc, sd->Ng, sd->I, sd->dI.dx, sd->dI.dy, randu, randv,
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eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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#endif /* __PRINCIPLED__ */
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#endif
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#ifdef __VOLUME__
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case CLOSURE_VOLUME_HENYEY_GREENSTEIN_ID:
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label = volume_henyey_greenstein_sample(sc, sd->I, sd->dI.dx, sd->dI.dy, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
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break;
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#endif
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default:
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label = LABEL_NONE;
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break;
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}
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return label;
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}
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#ifndef __KERNEL_CUDA__
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ccl_device
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#else
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ccl_device_forceinline
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#endif
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float3 bsdf_eval(KernelGlobals *kg,
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ShaderData *sd,
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const ShaderClosure *sc,
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const float3 omega_in,
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float *pdf)
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{
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float3 eval;
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if(dot(sd->Ng, omega_in) >= 0.0f) {
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switch(sc->type) {
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case CLOSURE_BSDF_DIFFUSE_ID:
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case CLOSURE_BSDF_BSSRDF_ID:
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eval = bsdf_diffuse_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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#ifdef __SVM__
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case CLOSURE_BSDF_OREN_NAYAR_ID:
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eval = bsdf_oren_nayar_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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#ifdef __OSL__
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case CLOSURE_BSDF_PHONG_RAMP_ID:
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eval = bsdf_phong_ramp_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_DIFFUSE_RAMP_ID:
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eval = bsdf_diffuse_ramp_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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#endif
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case CLOSURE_BSDF_TRANSLUCENT_ID:
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eval = bsdf_translucent_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_REFLECTION_ID:
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eval = bsdf_reflection_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_REFRACTION_ID:
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eval = bsdf_refraction_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_TRANSPARENT_ID:
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eval = bsdf_transparent_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_MICROFACET_GGX_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_FRESNEL_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_CLEARCOAT_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_ANISO_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_ANISO_FRESNEL_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
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eval = bsdf_microfacet_ggx_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID:
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_FRESNEL_ID:
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eval = bsdf_microfacet_multi_ggx_eval_reflect(sc, sd->I, omega_in, pdf, &sd->lcg_state);
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break;
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID:
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_FRESNEL_ID:
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eval = bsdf_microfacet_multi_ggx_glass_eval_reflect(sc, sd->I, omega_in, pdf, &sd->lcg_state);
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break;
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case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
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case CLOSURE_BSDF_MICROFACET_BECKMANN_ANISO_ID:
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case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
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eval = bsdf_microfacet_beckmann_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
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case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ANISO_ID:
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eval = bsdf_ashikhmin_shirley_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
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eval = bsdf_ashikhmin_velvet_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_DIFFUSE_TOON_ID:
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eval = bsdf_diffuse_toon_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_GLOSSY_TOON_ID:
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eval = bsdf_glossy_toon_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_HAIR_REFLECTION_ID:
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eval = bsdf_hair_reflection_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_HAIR_TRANSMISSION_ID:
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eval = bsdf_hair_transmission_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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#ifdef __PRINCIPLED__
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case CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID:
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case CLOSURE_BSDF_BSSRDF_PRINCIPLED_ID:
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eval = bsdf_principled_diffuse_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_PRINCIPLED_SHEEN_ID:
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eval = bsdf_principled_sheen_eval_reflect(sc, sd->I, omega_in, pdf);
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break;
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#endif /* __PRINCIPLED__ */
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#endif
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#ifdef __VOLUME__
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case CLOSURE_VOLUME_HENYEY_GREENSTEIN_ID:
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eval = volume_henyey_greenstein_eval_phase(sc, sd->I, omega_in, pdf);
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break;
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#endif
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default:
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eval = make_float3(0.0f, 0.0f, 0.0f);
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break;
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}
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}
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else {
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switch(sc->type) {
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case CLOSURE_BSDF_DIFFUSE_ID:
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case CLOSURE_BSDF_BSSRDF_ID:
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eval = bsdf_diffuse_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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#ifdef __SVM__
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case CLOSURE_BSDF_OREN_NAYAR_ID:
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eval = bsdf_oren_nayar_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_TRANSLUCENT_ID:
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eval = bsdf_translucent_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_REFLECTION_ID:
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eval = bsdf_reflection_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_REFRACTION_ID:
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eval = bsdf_refraction_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_TRANSPARENT_ID:
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eval = bsdf_transparent_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_MICROFACET_GGX_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_FRESNEL_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_CLEARCOAT_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_ANISO_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_ANISO_FRESNEL_ID:
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case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
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eval = bsdf_microfacet_ggx_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID:
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_FRESNEL_ID:
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eval = bsdf_microfacet_multi_ggx_eval_transmit(sc, sd->I, omega_in, pdf, &sd->lcg_state);
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break;
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID:
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case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_FRESNEL_ID:
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eval = bsdf_microfacet_multi_ggx_glass_eval_transmit(sc, sd->I, omega_in, pdf, &sd->lcg_state);
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break;
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case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
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case CLOSURE_BSDF_MICROFACET_BECKMANN_ANISO_ID:
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case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
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eval = bsdf_microfacet_beckmann_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
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case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ANISO_ID:
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eval = bsdf_ashikhmin_shirley_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
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eval = bsdf_ashikhmin_velvet_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_DIFFUSE_TOON_ID:
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eval = bsdf_diffuse_toon_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_GLOSSY_TOON_ID:
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eval = bsdf_glossy_toon_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_HAIR_REFLECTION_ID:
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eval = bsdf_hair_reflection_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_HAIR_TRANSMISSION_ID:
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eval = bsdf_hair_transmission_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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#ifdef __PRINCIPLED__
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case CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID:
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case CLOSURE_BSDF_BSSRDF_PRINCIPLED_ID:
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eval = bsdf_principled_diffuse_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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case CLOSURE_BSDF_PRINCIPLED_SHEEN_ID:
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eval = bsdf_principled_sheen_eval_transmit(sc, sd->I, omega_in, pdf);
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break;
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#endif /* __PRINCIPLED__ */
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#endif
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#ifdef __VOLUME__
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case CLOSURE_VOLUME_HENYEY_GREENSTEIN_ID:
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eval = volume_henyey_greenstein_eval_phase(sc, sd->I, omega_in, pdf);
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break;
|
|
#endif
|
|
default:
|
|
eval = make_float3(0.0f, 0.0f, 0.0f);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return eval;
|
|
}
|
|
|
|
ccl_device void bsdf_blur(KernelGlobals *kg, ShaderClosure *sc, float roughness)
|
|
{
|
|
/* ToDo: do we want to blur volume closures? */
|
|
#ifdef __SVM__
|
|
switch(sc->type) {
|
|
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID:
|
|
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_FRESNEL_ID:
|
|
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID:
|
|
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_FRESNEL_ID:
|
|
bsdf_microfacet_multi_ggx_blur(sc, roughness);
|
|
break;
|
|
case CLOSURE_BSDF_MICROFACET_GGX_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_FRESNEL_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_CLEARCOAT_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_ANISO_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_ANISO_FRESNEL_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
|
|
bsdf_microfacet_ggx_blur(sc, roughness);
|
|
break;
|
|
case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
|
|
case CLOSURE_BSDF_MICROFACET_BECKMANN_ANISO_ID:
|
|
case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
|
|
bsdf_microfacet_beckmann_blur(sc, roughness);
|
|
break;
|
|
case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
|
|
case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ANISO_ID:
|
|
bsdf_ashikhmin_shirley_blur(sc, roughness);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
ccl_device bool bsdf_merge(ShaderClosure *a, ShaderClosure *b)
|
|
{
|
|
#ifdef __SVM__
|
|
switch(a->type) {
|
|
case CLOSURE_BSDF_TRANSPARENT_ID:
|
|
return true;
|
|
case CLOSURE_BSDF_DIFFUSE_ID:
|
|
case CLOSURE_BSDF_BSSRDF_ID:
|
|
case CLOSURE_BSDF_TRANSLUCENT_ID:
|
|
return bsdf_diffuse_merge(a, b);
|
|
case CLOSURE_BSDF_OREN_NAYAR_ID:
|
|
return bsdf_oren_nayar_merge(a, b);
|
|
case CLOSURE_BSDF_REFLECTION_ID:
|
|
case CLOSURE_BSDF_REFRACTION_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_FRESNEL_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_CLEARCOAT_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_ANISO_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_ANISO_FRESNEL_ID:
|
|
case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
|
|
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID:
|
|
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_FRESNEL_ID:
|
|
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID:
|
|
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_FRESNEL_ID:
|
|
case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
|
|
case CLOSURE_BSDF_MICROFACET_BECKMANN_ANISO_ID:
|
|
case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
|
|
case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
|
|
case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ANISO_ID:
|
|
return bsdf_microfacet_merge(a, b);
|
|
case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
|
|
return bsdf_ashikhmin_velvet_merge(a, b);
|
|
case CLOSURE_BSDF_DIFFUSE_TOON_ID:
|
|
case CLOSURE_BSDF_GLOSSY_TOON_ID:
|
|
return bsdf_toon_merge(a, b);
|
|
case CLOSURE_BSDF_HAIR_REFLECTION_ID:
|
|
case CLOSURE_BSDF_HAIR_TRANSMISSION_ID:
|
|
return bsdf_hair_merge(a, b);
|
|
#ifdef __PRINCIPLED__
|
|
case CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID:
|
|
case CLOSURE_BSDF_BSSRDF_PRINCIPLED_ID:
|
|
return bsdf_principled_diffuse_merge(a, b);
|
|
#endif
|
|
#ifdef __VOLUME__
|
|
case CLOSURE_VOLUME_HENYEY_GREENSTEIN_ID:
|
|
return volume_henyey_greenstein_merge(a, b);
|
|
#endif
|
|
default:
|
|
return false;
|
|
}
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
/* Classifies a closure as diffuse-like or specular-like.
|
|
* This is needed for the denoising feature pass generation,
|
|
* which are written on the first bounce where more than 25%
|
|
* of the sampling weight belongs to diffuse-line closures. */
|
|
ccl_device_inline bool bsdf_is_specular_like(ShaderClosure *sc)
|
|
{
|
|
if(CLOSURE_IS_BSDF_TRANSPARENT(sc->type)) {
|
|
return true;
|
|
}
|
|
|
|
if(CLOSURE_IS_BSDF_MICROFACET(sc->type)) {
|
|
MicrofacetBsdf *bsdf = (MicrofacetBsdf*) sc;
|
|
return (bsdf->alpha_x*bsdf->alpha_y <= 0.075f*0.075f);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|
|
|