diff options
Diffstat (limited to 'intern/cycles/kernel/svm')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_closure.h | 332 | ||||
| -rw-r--r-- | intern/cycles/kernel/svm/svm_types.h | 15 |
2 files changed, 346 insertions, 1 deletions
diff --git a/intern/cycles/kernel/svm/svm_closure.h b/intern/cycles/kernel/svm/svm_closure.h index 1885e1af851..9a3689a94f4 100644 --- a/intern/cycles/kernel/svm/svm_closure.h +++ b/intern/cycles/kernel/svm/svm_closure.h @@ -76,6 +76,338 @@ ccl_device void svm_node_closure_bsdf(KernelGlobals *kg, ShaderData *sd, float * float param2 = (stack_valid(param2_offset))? stack_load_float(stack, param2_offset): __uint_as_float(node.w); switch(type) { + case CLOSURE_BSDF_PRINCIPLED_ID: { + uint specular_offset, roughness_offset, specular_tint_offset, anisotropic_offset, sheen_offset, + sheen_tint_offset, clearcoat_offset, clearcoat_gloss_offset, eta_offset, transparency_offset, + anisotropic_rotation_offset, refraction_roughness_offset; + uint4 data_node2 = read_node(kg, offset); + + float3 T = stack_load_float3(stack, data_node.y); + decode_node_uchar4(data_node.z, &specular_offset, &roughness_offset, &specular_tint_offset, &anisotropic_offset); + decode_node_uchar4(data_node.w, &sheen_offset, &sheen_tint_offset, &clearcoat_offset, &clearcoat_gloss_offset); + decode_node_uchar4(data_node2.x, &eta_offset, &transparency_offset, &anisotropic_rotation_offset, &refraction_roughness_offset); + + // get Disney principled parameters + float metallic = param1; + float subsurface = param2; + float specular = stack_load_float(stack, specular_offset); + float roughness = stack_load_float(stack, roughness_offset); + float specular_tint = stack_load_float(stack, specular_tint_offset); + float anisotropic = stack_load_float(stack, anisotropic_offset); + float sheen = stack_load_float(stack, sheen_offset); + float sheen_tint = stack_load_float(stack, sheen_tint_offset); + float clearcoat = stack_load_float(stack, clearcoat_offset); + float clearcoat_gloss = stack_load_float(stack, clearcoat_gloss_offset); + float transparency = stack_load_float(stack, transparency_offset); + float anisotropic_rotation = stack_load_float(stack, anisotropic_rotation_offset); + float refraction_roughness = stack_load_float(stack, refraction_roughness_offset); + float eta = fmaxf(stack_load_float(stack, eta_offset), 1e-5f); + + ClosureType distribution = stack_valid(data_node2.y) ? (ClosureType) data_node2.y : CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID; + + /* rotate tangent */ + if(anisotropic_rotation != 0.0f) + T = rotate_around_axis(T, N, anisotropic_rotation * M_2PI_F); + + /* calculate ior */ + float ior = (sd->flag & SD_BACKFACING) ? 1.0f / eta : eta; + + // calculate fresnel for refraction + float cosNO = dot(N, sd->I); + float fresnel = fresnel_dielectric_cos(cosNO, ior); + + // calculate weights of the diffuse and specular part + float diffuse_weight = (1.0f - saturate(metallic)) * (1.0f - saturate(transparency)); + + float transp = saturate(transparency) * (1.0f - saturate(metallic)); + float specular_weight = (1.0f - transp); + + // get the base color + uint4 data_base_color = read_node(kg, offset); + float3 base_color = stack_valid(data_base_color.x) ? stack_load_float3(stack, data_base_color.x) : + make_float3(__uint_as_float(data_base_color.y), __uint_as_float(data_base_color.z), __uint_as_float(data_base_color.w)); + + // get the additional clearcoat normal and subsurface scattering radius + uint4 data_cn_ssr = read_node(kg, offset); + float3 clearcoat_normal = stack_valid(data_cn_ssr.x) ? stack_load_float3(stack, data_cn_ssr.x) : sd->N; + float3 subsurface_radius = stack_valid(data_cn_ssr.y) ? stack_load_float3(stack, data_cn_ssr.y) : make_float3(1.0f, 1.0f, 1.0f); + + // get the subsurface color + uint4 data_subsurface_color = read_node(kg, offset); + float3 subsurface_color = stack_valid(data_subsurface_color.x) ? stack_load_float3(stack, data_subsurface_color.x) : + make_float3(__uint_as_float(data_subsurface_color.y), __uint_as_float(data_subsurface_color.z), __uint_as_float(data_subsurface_color.w)); + + float3 weight = sd->svm_closure_weight * mix_weight; + +#ifdef __SUBSURFACE__ + float3 albedo = subsurface_color * subsurface + base_color * (1.0f - subsurface); + float3 subsurf_weight = weight * albedo * diffuse_weight; + float subsurf_sample_weight = fabsf(average(subsurf_weight)); + + /* disable in case of diffuse ancestor, can't see it well then and + * adds considerably noise due to probabilities of continuing path + * getting lower and lower */ + if(path_flag & PATH_RAY_DIFFUSE_ANCESTOR) { + subsurface = 0.0f; + } + + /* diffuse */ + if(fabsf(average(base_color)) > CLOSURE_WEIGHT_CUTOFF) { + if(subsurface < CLOSURE_WEIGHT_CUTOFF && diffuse_weight > CLOSURE_WEIGHT_CUTOFF) { + float3 diff_weight = weight * base_color * diffuse_weight; + + PrincipledDiffuseBsdf *bsdf = (PrincipledDiffuseBsdf*)bsdf_alloc(sd, sizeof(PrincipledDiffuseBsdf), diff_weight); + + if(bsdf) { + bsdf->N = N; + bsdf->roughness = roughness; + + /* setup bsdf */ + sd->flag |= bsdf_principled_diffuse_setup(bsdf); + } + } + else if(subsurface > CLOSURE_WEIGHT_CUTOFF && subsurf_sample_weight > CLOSURE_WEIGHT_CUTOFF) { + /* radius * scale */ + float3 radius = subsurface_radius * subsurface; + /* sharpness */ + float sharpness = 0.0f; + /* texture color blur */ + float texture_blur = 0.0f; + + /* create one closure per color channel */ + Bssrdf *bssrdf = bssrdf_alloc(sd, make_float3(subsurf_weight.x, 0.0f, 0.0f)); + if(bssrdf) { + bssrdf->sample_weight = subsurf_sample_weight; + bssrdf->radius = radius.x; + bssrdf->texture_blur = texture_blur; + bssrdf->albedo = albedo.x; + bssrdf->sharpness = sharpness; + bssrdf->N = N; + bssrdf->roughness = roughness; + + /* setup bsdf */ + sd->flag |= bssrdf_setup(bssrdf, (ClosureType)CLOSURE_BSSRDF_PRINCIPLED_ID); + } + + bssrdf = bssrdf_alloc(sd, make_float3(0.0f, subsurf_weight.y, 0.0f)); + if(bssrdf) { + bssrdf->sample_weight = subsurf_sample_weight; + bssrdf->radius = radius.y; + bssrdf->texture_blur = texture_blur; + bssrdf->albedo = albedo.y; + bssrdf->sharpness = sharpness; + bssrdf->N = N; + bssrdf->roughness = roughness; + + /* setup bsdf */ + sd->flag |= bssrdf_setup(bssrdf, (ClosureType)CLOSURE_BSSRDF_PRINCIPLED_ID); + } + + bssrdf = bssrdf_alloc(sd, make_float3(0.0f, 0.0f, subsurf_weight.z)); + if(bssrdf) { + bssrdf->sample_weight = subsurf_sample_weight; + bssrdf->radius = radius.z; + bssrdf->texture_blur = texture_blur; + bssrdf->albedo = albedo.z; + bssrdf->sharpness = sharpness; + bssrdf->N = N; + bssrdf->roughness = roughness; + + /* setup bsdf */ + sd->flag |= bssrdf_setup(bssrdf, (ClosureType)CLOSURE_BSSRDF_PRINCIPLED_ID); + } + } + } +#else + /* diffuse */ + if(diffuse_weight > CLOSURE_WEIGHT_CUTOFF) { + float3 diff_weight = weight * base_color * diffuse_weight; + + PrincipledDiffuseBsdf *bsdf = (PrincipledDiffuseBsdf*)bsdf_alloc(sd, sizeof(PrincipledDiffuseBsdf), diff_weight); + + if(bsdf) { + bsdf->N = N; + bsdf->roughness = roughness; + + /* setup bsdf */ + sd->flag |= bsdf_principled_diffuse_setup(bsdf); + } + } +#endif + + /* sheen */ + if(diffuse_weight > CLOSURE_WEIGHT_CUTOFF && sheen > CLOSURE_WEIGHT_CUTOFF) { + float m_cdlum = linear_rgb_to_gray(base_color); + float3 m_ctint = m_cdlum > 0.0f ? base_color / m_cdlum : make_float3(1.0f, 1.0f, 1.0f); // normalize lum. to isolate hue+sat + + /* color of the sheen component */ + float3 sheen_color = make_float3(1.0f, 1.0f, 1.0f) * (1.0f - sheen_tint) + m_ctint * sheen_tint; + + float3 sheen_weight = weight * sheen * sheen_color * diffuse_weight; + + PrincipledSheenBsdf *bsdf = (PrincipledSheenBsdf*)bsdf_alloc(sd, sizeof(PrincipledSheenBsdf), sheen_weight); + + if(bsdf) { + bsdf->N = N; + + /* setup bsdf */ + sd->flag |= bsdf_principled_sheen_setup(bsdf); + } + } + + /* specular reflection */ +#ifdef __CAUSTICS_TRICKS__ + if(kernel_data.integrator.caustics_reflective || (path_flag & PATH_RAY_DIFFUSE) == 0) { +#endif + if(specular_weight > CLOSURE_WEIGHT_CUTOFF && (specular > CLOSURE_WEIGHT_CUTOFF || metallic > CLOSURE_WEIGHT_CUTOFF)) { + float3 spec_weight = weight * specular_weight; + + MicrofacetBsdf *bsdf = (MicrofacetBsdf*)bsdf_alloc(sd, sizeof(MicrofacetBsdf), spec_weight); + MicrofacetExtra *extra = (MicrofacetExtra*)closure_alloc_extra(sd, sizeof(MicrofacetExtra)); + + if(bsdf && extra) { + bsdf->N = N; + bsdf->ior = (2.0f / (1.0f - safe_sqrtf(0.08f * specular))) - 1.0f; + bsdf->T = T; + bsdf->extra = extra; + + float aspect = safe_sqrtf(1.0f - anisotropic * 0.9f); + float r2 = roughness * roughness; + + bsdf->alpha_x = fmaxf(0.001f, r2 / aspect); + bsdf->alpha_y = fmaxf(0.001f, r2 * aspect); + + float m_cdlum = 0.3f * base_color.x + 0.6f * base_color.y + 0.1f * base_color.z; // luminance approx. + float3 m_ctint = m_cdlum > 0.0f ? base_color / m_cdlum : make_float3(0.0f, 0.0f, 0.0f); // normalize lum. to isolate hue+sat + float3 tmp_col = make_float3(1.0f, 1.0f, 1.0f) * (1.0f - specular_tint) + m_ctint * specular_tint; + + bsdf->extra->cspec0 = (specular * 0.08f * tmp_col) * (1.0f - metallic) + base_color * metallic; + bsdf->extra->color = base_color; + + /* setup bsdf */ + if(distribution == CLOSURE_BSDF_MICROFACET_GGX_GLASS_ID || roughness <= 0.075f) /* use single-scatter GGX */ + sd->flag |= bsdf_microfacet_ggx_aniso_fresnel_setup(bsdf); + else /* use multi-scatter GGX */ + sd->flag |= bsdf_microfacet_multi_ggx_aniso_fresnel_setup(bsdf); + } + } +#ifdef __CAUSTICS_TRICKS__ + } +#endif + + /* BSDF */ +#ifdef __CAUSTICS_TRICKS__ + if(kernel_data.integrator.caustics_reflective || kernel_data.integrator.caustics_refractive || (path_flag & PATH_RAY_DIFFUSE) == 0) { +#endif + if(transp > CLOSURE_WEIGHT_CUTOFF) { + float3 glass_weight = weight * transp; + float3 cspec0 = base_color * specular_tint + make_float3(1.0f, 1.0f, 1.0f) * (1.0f - specular_tint); + + if(roughness <= 5e-2f || distribution == CLOSURE_BSDF_MICROFACET_GGX_GLASS_ID) { /* use single-scatter GGX */ + float refl_roughness = roughness; + + /* reflection */ +#ifdef __CAUSTICS_TRICKS__ + if(kernel_data.integrator.caustics_reflective || (path_flag & PATH_RAY_DIFFUSE) == 0) +#endif + { + MicrofacetBsdf *bsdf = (MicrofacetBsdf*)bsdf_alloc(sd, sizeof(MicrofacetBsdf), glass_weight*fresnel); + MicrofacetExtra *extra = (MicrofacetExtra*)closure_alloc_extra(sd, sizeof(MicrofacetExtra)); + + if(bsdf && extra) { + bsdf->N = N; + bsdf->extra = extra; + + bsdf->alpha_x = refl_roughness * refl_roughness; + bsdf->alpha_y = refl_roughness * refl_roughness; + bsdf->ior = ior; + + bsdf->extra->color = base_color; + bsdf->extra->cspec0 = cspec0; + + /* setup bsdf */ + sd->flag |= bsdf_microfacet_ggx_fresnel_setup(bsdf); + } + } + + /* refraction */ +#ifdef __CAUSTICS_TRICKS__ + if(kernel_data.integrator.caustics_refractive || (path_flag & PATH_RAY_DIFFUSE) == 0) +#endif + { + MicrofacetBsdf *bsdf = (MicrofacetBsdf*)bsdf_alloc(sd, sizeof(MicrofacetBsdf), base_color*glass_weight*(1.0f - fresnel)); + + if(bsdf) { + bsdf->N = N; + + if(distribution == CLOSURE_BSDF_MICROFACET_GGX_GLASS_ID) + refraction_roughness = 1.0f - (1.0f - refl_roughness) * (1.0f - refraction_roughness); + else + refraction_roughness = refl_roughness; + + bsdf->alpha_x = refraction_roughness * refraction_roughness; + bsdf->alpha_y = refraction_roughness * refraction_roughness; + bsdf->ior = ior; + + /* setup bsdf */ + sd->flag |= bsdf_microfacet_ggx_refraction_setup(bsdf); + } + } + } + else { /* use multi-scatter GGX */ + MicrofacetBsdf *bsdf = (MicrofacetBsdf*)bsdf_alloc(sd, sizeof(MicrofacetBsdf), glass_weight); + MicrofacetExtra *extra = (MicrofacetExtra*)closure_alloc_extra(sd, sizeof(MicrofacetExtra)); + + if(bsdf && extra) { + bsdf->N = N; + bsdf->extra = extra; + bsdf->T = make_float3(0.0f, 0.0f, 0.0f); + + bsdf->alpha_x = roughness * roughness; + bsdf->alpha_y = roughness * roughness; + bsdf->ior = ior; + + bsdf->extra->color = base_color; + bsdf->extra->cspec0 = cspec0; + + /* setup bsdf */ + sd->flag |= bsdf_microfacet_multi_ggx_glass_fresnel_setup(bsdf); + } + } + } +#ifdef __CAUSTICS_TRICKS__ + } +#endif + + /* clearcoat */ +#ifdef __CAUSTICS_TRICKS__ + if(kernel_data.integrator.caustics_reflective || (path_flag & PATH_RAY_DIFFUSE) == 0) { +#endif + if(clearcoat > CLOSURE_WEIGHT_CUTOFF) { + MicrofacetBsdf *bsdf = (MicrofacetBsdf*)bsdf_alloc(sd, sizeof(MicrofacetBsdf), weight); + MicrofacetExtra *extra = (MicrofacetExtra*)closure_alloc_extra(sd, sizeof(MicrofacetExtra)); + + if(bsdf && extra) { + bsdf->N = clearcoat_normal; + bsdf->ior = 1.5f; + bsdf->extra = extra; + + bsdf->alpha_x = 0.1f * (1.0f - clearcoat_gloss) + 0.001f * clearcoat_gloss; + bsdf->alpha_y = 0.1f * (1.0f - clearcoat_gloss) + 0.001f * clearcoat_gloss; + + bsdf->extra->cspec0 = make_float3(0.04f, 0.04f, 0.04f); + bsdf->extra->clearcoat = clearcoat; + + /* setup bsdf */ + sd->flag |= bsdf_microfacet_ggx_clearcoat_setup(bsdf); + } + } +#ifdef __CAUSTICS_TRICKS__ + } +#endif + + break; + } case CLOSURE_BSDF_DIFFUSE_ID: { float3 weight = sd->svm_closure_weight * mix_weight; OrenNayarBsdf *bsdf = (OrenNayarBsdf*)bsdf_alloc(sd, sizeof(OrenNayarBsdf), weight); diff --git a/intern/cycles/kernel/svm/svm_types.h b/intern/cycles/kernel/svm/svm_types.h index 47209ddfbab..4a8cdb60952 100644 --- a/intern/cycles/kernel/svm/svm_types.h +++ b/intern/cycles/kernel/svm/svm_types.h @@ -397,17 +397,24 @@ typedef enum ClosureType { CLOSURE_BSDF_DIFFUSE_ID, CLOSURE_BSDF_OREN_NAYAR_ID, CLOSURE_BSDF_DIFFUSE_RAMP_ID, + CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID, + CLOSURE_BSDF_PRINCIPLED_SHEEN_ID, CLOSURE_BSDF_DIFFUSE_TOON_ID, /* Glossy */ CLOSURE_BSDF_GLOSSY_ID, CLOSURE_BSDF_REFLECTION_ID, CLOSURE_BSDF_MICROFACET_GGX_ID, + CLOSURE_BSDF_MICROFACET_GGX_FRESNEL_ID, + CLOSURE_BSDF_MICROFACET_GGX_CLEARCOAT_ID, CLOSURE_BSDF_MICROFACET_BECKMANN_ID, CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID, + CLOSURE_BSDF_MICROFACET_MULTI_GGX_FRESNEL_ID, CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID, CLOSURE_BSDF_MICROFACET_GGX_ANISO_ID, + CLOSURE_BSDF_MICROFACET_GGX_ANISO_FRESNEL_ID, CLOSURE_BSDF_MICROFACET_MULTI_GGX_ANISO_ID, + CLOSURE_BSDF_MICROFACET_MULTI_GGX_ANISO_FRESNEL_ID, CLOSURE_BSDF_MICROFACET_BECKMANN_ANISO_ID, CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ANISO_ID, CLOSURE_BSDF_ASHIKHMIN_VELVET_ID, @@ -424,16 +431,19 @@ typedef enum ClosureType { CLOSURE_BSDF_MICROFACET_BECKMANN_GLASS_ID, CLOSURE_BSDF_MICROFACET_GGX_GLASS_ID, CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID, + CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_FRESNEL_ID, CLOSURE_BSDF_SHARP_GLASS_ID, CLOSURE_BSDF_HAIR_TRANSMISSION_ID, /* Special cases */ CLOSURE_BSDF_BSSRDF_ID, + CLOSURE_BSDF_BSSRDF_PRINCIPLED_ID, CLOSURE_BSDF_TRANSPARENT_ID, /* BSSRDF */ CLOSURE_BSSRDF_CUBIC_ID, CLOSURE_BSSRDF_GAUSSIAN_ID, + CLOSURE_BSSRDF_PRINCIPLED_ID, CLOSURE_BSSRDF_BURLEY_ID, /* Other */ @@ -447,6 +457,8 @@ typedef enum ClosureType { CLOSURE_VOLUME_ABSORPTION_ID, CLOSURE_VOLUME_HENYEY_GREENSTEIN_ID, + CLOSURE_BSDF_PRINCIPLED_ID, + NBUILTIN_CLOSURES } ClosureType; @@ -455,7 +467,7 @@ typedef enum ClosureType { #define CLOSURE_IS_BSDF_DIFFUSE(type) (type >= CLOSURE_BSDF_DIFFUSE_ID && type <= CLOSURE_BSDF_DIFFUSE_TOON_ID) #define CLOSURE_IS_BSDF_GLOSSY(type) (type >= CLOSURE_BSDF_GLOSSY_ID && type <= CLOSURE_BSDF_HAIR_REFLECTION_ID) #define CLOSURE_IS_BSDF_TRANSMISSION(type) (type >= CLOSURE_BSDF_TRANSMISSION_ID && type <= CLOSURE_BSDF_HAIR_TRANSMISSION_ID) -#define CLOSURE_IS_BSDF_BSSRDF(type) (type == CLOSURE_BSDF_BSSRDF_ID) +#define CLOSURE_IS_BSDF_BSSRDF(type) (type == CLOSURE_BSDF_BSSRDF_ID || type == CLOSURE_BSDF_BSSRDF_PRINCIPLED_ID) #define CLOSURE_IS_BSDF_ANISOTROPIC(type) (type >= CLOSURE_BSDF_MICROFACET_GGX_ANISO_ID && type <= CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ANISO_ID) #define CLOSURE_IS_BSDF_MULTISCATTER(type) (type == CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID ||\ type == CLOSURE_BSDF_MICROFACET_MULTI_GGX_ANISO_ID || \ @@ -469,6 +481,7 @@ typedef enum ClosureType { #define CLOSURE_IS_AMBIENT_OCCLUSION(type) (type == CLOSURE_AMBIENT_OCCLUSION_ID) #define CLOSURE_IS_PHASE(type) (type == CLOSURE_VOLUME_HENYEY_GREENSTEIN_ID) #define CLOSURE_IS_GLASS(type) (type >= CLOSURE_BSDF_MICROFACET_BECKMANN_GLASS_ID && type <= CLOSURE_BSDF_SHARP_GLASS_ID) +#define CLOSURE_IS_PRINCIPLED(type) (type == CLOSURE_BSDF_PRINCIPLED_ID) #define CLOSURE_WEIGHT_CUTOFF 1e-5f |