diff options
Diffstat (limited to 'intern/cycles/kernel/closure/bsdf_principled_diffuse.h')
| -rw-r--r-- | intern/cycles/kernel/closure/bsdf_principled_diffuse.h | 130 |
1 files changed, 71 insertions, 59 deletions
diff --git a/intern/cycles/kernel/closure/bsdf_principled_diffuse.h b/intern/cycles/kernel/closure/bsdf_principled_diffuse.h index 2f65fd54be2..d7795974ef5 100644 --- a/intern/cycles/kernel/closure/bsdf_principled_diffuse.h +++ b/intern/cycles/kernel/closure/bsdf_principled_diffuse.h @@ -25,101 +25,113 @@ CCL_NAMESPACE_BEGIN typedef ccl_addr_space struct PrincipledDiffuseBsdf { - SHADER_CLOSURE_BASE; + SHADER_CLOSURE_BASE; - float roughness; + float roughness; } PrincipledDiffuseBsdf; -ccl_device float3 calculate_principled_diffuse_brdf(const PrincipledDiffuseBsdf *bsdf, - float3 N, float3 V, float3 L, float3 H, float *pdf) +ccl_device float3 calculate_principled_diffuse_brdf( + const PrincipledDiffuseBsdf *bsdf, float3 N, float3 V, float3 L, float3 H, float *pdf) { - float NdotL = max(dot(N, L), 0.0f); - float NdotV = max(dot(N, V), 0.0f); + float NdotL = max(dot(N, L), 0.0f); + float NdotV = max(dot(N, V), 0.0f); - if(NdotL < 0 || NdotV < 0) { - *pdf = 0.0f; - return make_float3(0.0f, 0.0f, 0.0f); - } + if (NdotL < 0 || NdotV < 0) { + *pdf = 0.0f; + return make_float3(0.0f, 0.0f, 0.0f); + } - float LdotH = dot(L, H); + float LdotH = dot(L, H); - float FL = schlick_fresnel(NdotL), FV = schlick_fresnel(NdotV); - const float Fd90 = 0.5f + 2.0f * LdotH*LdotH * bsdf->roughness; - float Fd = (1.0f * (1.0f - FL) + Fd90 * FL) * (1.0f * (1.0f - FV) + Fd90 * FV); + float FL = schlick_fresnel(NdotL), FV = schlick_fresnel(NdotV); + const float Fd90 = 0.5f + 2.0f * LdotH * LdotH * bsdf->roughness; + float Fd = (1.0f * (1.0f - FL) + Fd90 * FL) * (1.0f * (1.0f - FV) + Fd90 * FV); - float value = M_1_PI_F * NdotL * Fd; + float value = M_1_PI_F * NdotL * Fd; - return make_float3(value, value, value); + return make_float3(value, value, value); } ccl_device int bsdf_principled_diffuse_setup(PrincipledDiffuseBsdf *bsdf) { - bsdf->type = CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID; - return SD_BSDF|SD_BSDF_HAS_EVAL; + bsdf->type = CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID; + return SD_BSDF | SD_BSDF_HAS_EVAL; } ccl_device bool bsdf_principled_diffuse_merge(const ShaderClosure *a, const ShaderClosure *b) { - const PrincipledDiffuseBsdf *bsdf_a = (const PrincipledDiffuseBsdf*)a; - const PrincipledDiffuseBsdf *bsdf_b = (const PrincipledDiffuseBsdf*)b; + const PrincipledDiffuseBsdf *bsdf_a = (const PrincipledDiffuseBsdf *)a; + const PrincipledDiffuseBsdf *bsdf_b = (const PrincipledDiffuseBsdf *)b; - return (isequal_float3(bsdf_a->N, bsdf_b->N) && bsdf_a->roughness == bsdf_b->roughness); + return (isequal_float3(bsdf_a->N, bsdf_b->N) && bsdf_a->roughness == bsdf_b->roughness); } -ccl_device float3 bsdf_principled_diffuse_eval_reflect(const ShaderClosure *sc, const float3 I, - const float3 omega_in, float *pdf) +ccl_device float3 bsdf_principled_diffuse_eval_reflect(const ShaderClosure *sc, + const float3 I, + const float3 omega_in, + float *pdf) { - const PrincipledDiffuseBsdf *bsdf = (const PrincipledDiffuseBsdf *)sc; - - float3 N = bsdf->N; - float3 V = I; // outgoing - float3 L = omega_in; // incoming - float3 H = normalize(L + V); - - if(dot(N, omega_in) > 0.0f) { - *pdf = fmaxf(dot(N, omega_in), 0.0f) * M_1_PI_F; - return calculate_principled_diffuse_brdf(bsdf, N, V, L, H, pdf); - } - else { - *pdf = 0.0f; - return make_float3(0.0f, 0.0f, 0.0f); - } + const PrincipledDiffuseBsdf *bsdf = (const PrincipledDiffuseBsdf *)sc; + + float3 N = bsdf->N; + float3 V = I; // outgoing + float3 L = omega_in; // incoming + float3 H = normalize(L + V); + + if (dot(N, omega_in) > 0.0f) { + *pdf = fmaxf(dot(N, omega_in), 0.0f) * M_1_PI_F; + return calculate_principled_diffuse_brdf(bsdf, N, V, L, H, pdf); + } + else { + *pdf = 0.0f; + return make_float3(0.0f, 0.0f, 0.0f); + } } -ccl_device float3 bsdf_principled_diffuse_eval_transmit(const ShaderClosure *sc, const float3 I, - const float3 omega_in, float *pdf) +ccl_device float3 bsdf_principled_diffuse_eval_transmit(const ShaderClosure *sc, + const float3 I, + const float3 omega_in, + float *pdf) { - return make_float3(0.0f, 0.0f, 0.0f); + return make_float3(0.0f, 0.0f, 0.0f); } ccl_device int bsdf_principled_diffuse_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) + 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) { - const PrincipledDiffuseBsdf *bsdf = (const PrincipledDiffuseBsdf *)sc; + const PrincipledDiffuseBsdf *bsdf = (const PrincipledDiffuseBsdf *)sc; - float3 N = bsdf->N; + float3 N = bsdf->N; - sample_cos_hemisphere(N, randu, randv, omega_in, pdf); + sample_cos_hemisphere(N, randu, randv, omega_in, pdf); - if(dot(Ng, *omega_in) > 0) { - float3 H = normalize(I + *omega_in); + if (dot(Ng, *omega_in) > 0) { + float3 H = normalize(I + *omega_in); - *eval = calculate_principled_diffuse_brdf(bsdf, N, I, *omega_in, H, pdf); + *eval = calculate_principled_diffuse_brdf(bsdf, N, I, *omega_in, H, pdf); #ifdef __RAY_DIFFERENTIALS__ - // TODO: find a better approximation for the diffuse bounce - *domega_in_dx = -((2 * dot(N, dIdx)) * N - dIdx); - *domega_in_dy = -((2 * dot(N, dIdy)) * N - dIdy); + // TODO: find a better approximation for the diffuse bounce + *domega_in_dx = -((2 * dot(N, dIdx)) * N - dIdx); + *domega_in_dy = -((2 * dot(N, dIdy)) * N - dIdy); #endif - } - else { - *pdf = 0.0f; - } - return LABEL_REFLECT|LABEL_DIFFUSE; + } + else { + *pdf = 0.0f; + } + return LABEL_REFLECT | LABEL_DIFFUSE; } CCL_NAMESPACE_END -#endif /* __BSDF_PRINCIPLED_DIFFUSE_H__ */ +#endif /* __BSDF_PRINCIPLED_DIFFUSE_H__ */ |