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Cycles: Added ray differential calculation for AO

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This commit is contained in:
Stefan Werner
2017-05-12 16:22:30 +02:00
parent ef65e1c823
commit 183a706239
2 changed files with 14 additions and 2 deletions
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8
intern/cycles/kernel/kernel_path.h
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@@ -376,8 +376,14 @@ ccl_device_noinline void kernel_path_ao(KernelGlobals *kg,
light_ray.D = ao_D;
light_ray.t = kernel_data.background.ao_distance;
light_ray.time = sd->time;
#ifdef __RAY_DIFFERENTIALS__
light_ray.dP = sd->dP;
light_ray.dD = differential3_zero();
/* This is how pbrt v3 implements differentials for diffuse bounces */
float3 a, b;
make_orthonormals(ao_D, &a, &b);
light_ray.dD.dx = normalize(ao_D + 0.1f * a);
light_ray.dD.dy = normalize(ao_D + 0.1f * b);
#endif /* __RAY_DIFFERENTIALS__ */
if(!shadow_blocked(kg, sd, emission_sd, state, &light_ray, &ao_shadow)) {
path_radiance_accum_ao(L, state, throughput, ao_alpha, ao_bsdf, ao_shadow);

8
intern/cycles/kernel/kernel_path_branched.h
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@@ -49,8 +49,14 @@ ccl_device_inline void kernel_branched_path_ao(KernelGlobals *kg,
light_ray.D = ao_D;
light_ray.t = kernel_data.background.ao_distance;
light_ray.time = sd->time;
#ifdef __RAY_DIFFERENTIALS__
light_ray.dP = sd->dP;
light_ray.dD = differential3_zero();
/* This is how pbrt v3 implements differentials for diffuse bounces */
float3 a, b;
make_orthonormals(ao_D, &a, &b);
light_ray.dD.dx = normalize(ao_D + 0.1f * a);
light_ray.dD.dy = normalize(ao_D + 0.1f * b);
#endif /* __RAY_DIFFERENTIALS__ */
if(!shadow_blocked(kg, sd, emission_sd, state, &light_ray, &ao_shadow)) {
path_radiance_accum_ao(L, state, throughput*num_samples_inv, ao_alpha, ao_bsdf, ao_shadow);