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path: root/intern/cycles/kernel/kernel_path_subsurface.h
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-rw-r--r--intern/cycles/kernel/kernel_path_subsurface.h213
1 files changed, 95 insertions, 118 deletions
diff --git a/intern/cycles/kernel/kernel_path_subsurface.h b/intern/cycles/kernel/kernel_path_subsurface.h
index b5a92c74ed5..97d3f292ca3 100644
--- a/intern/cycles/kernel/kernel_path_subsurface.h
+++ b/intern/cycles/kernel/kernel_path_subsurface.h
@@ -22,141 +22,118 @@ ccl_device
# else
ccl_device_inline
# endif
-bool kernel_path_subsurface_scatter(
- KernelGlobals *kg,
- ShaderData *sd,
- ShaderData *emission_sd,
- PathRadiance *L,
- ccl_addr_space PathState *state,
- ccl_addr_space Ray *ray,
- ccl_addr_space float3 *throughput,
- ccl_addr_space SubsurfaceIndirectRays *ss_indirect)
+ bool
+ kernel_path_subsurface_scatter(KernelGlobals *kg,
+ ShaderData *sd,
+ ShaderData *emission_sd,
+ PathRadiance *L,
+ ccl_addr_space PathState *state,
+ ccl_addr_space Ray *ray,
+ ccl_addr_space float3 *throughput,
+ ccl_addr_space SubsurfaceIndirectRays *ss_indirect)
{
- PROFILING_INIT(kg, PROFILING_SUBSURFACE);
-
- float bssrdf_u, bssrdf_v;
- path_state_rng_2D(kg, state, PRNG_BSDF_U, &bssrdf_u, &bssrdf_v);
-
- const ShaderClosure *sc = shader_bssrdf_pick(sd, throughput, &bssrdf_u);
-
- /* do bssrdf scatter step if we picked a bssrdf closure */
- if(sc) {
- /* We should never have two consecutive BSSRDF bounces,
- * the second one should be converted to a diffuse BSDF to
- * avoid this.
- */
- kernel_assert(!(state->flag & PATH_RAY_DIFFUSE_ANCESTOR));
-
- uint lcg_state = lcg_state_init_addrspace(state, 0x68bc21eb);
-
- LocalIntersection ss_isect;
- int num_hits = subsurface_scatter_multi_intersect(kg,
- &ss_isect,
- sd,
- state,
- sc,
- &lcg_state,
- bssrdf_u, bssrdf_v,
- false);
+ PROFILING_INIT(kg, PROFILING_SUBSURFACE);
+
+ float bssrdf_u, bssrdf_v;
+ path_state_rng_2D(kg, state, PRNG_BSDF_U, &bssrdf_u, &bssrdf_v);
+
+ const ShaderClosure *sc = shader_bssrdf_pick(sd, throughput, &bssrdf_u);
+
+ /* do bssrdf scatter step if we picked a bssrdf closure */
+ if (sc) {
+ /* We should never have two consecutive BSSRDF bounces,
+ * the second one should be converted to a diffuse BSDF to
+ * avoid this.
+ */
+ kernel_assert(!(state->flag & PATH_RAY_DIFFUSE_ANCESTOR));
+
+ uint lcg_state = lcg_state_init_addrspace(state, 0x68bc21eb);
+
+ LocalIntersection ss_isect;
+ int num_hits = subsurface_scatter_multi_intersect(
+ kg, &ss_isect, sd, state, sc, &lcg_state, bssrdf_u, bssrdf_v, false);
# ifdef __VOLUME__
- bool need_update_volume_stack =
- kernel_data.integrator.use_volumes &&
- sd->object_flag & SD_OBJECT_INTERSECTS_VOLUME;
-# endif /* __VOLUME__ */
-
- /* Closure memory will be overwritten, so read required variables now. */
- Bssrdf *bssrdf = (Bssrdf *)sc;
- ClosureType bssrdf_type = sc->type;
- float bssrdf_roughness = bssrdf->roughness;
-
- /* compute lighting with the BSDF closure */
- for(int hit = 0; hit < num_hits; hit++) {
- /* NOTE: We reuse the existing ShaderData, we assume the path
- * integration loop stops when this function returns true.
- */
- subsurface_scatter_multi_setup(kg,
- &ss_isect,
- hit,
- sd,
- state,
- bssrdf_type,
- bssrdf_roughness);
-
- kernel_path_surface_connect_light(kg, sd, emission_sd, *throughput, state, L);
-
- ccl_addr_space PathState *hit_state = &ss_indirect->state[ss_indirect->num_rays];
- ccl_addr_space Ray *hit_ray = &ss_indirect->rays[ss_indirect->num_rays];
- ccl_addr_space float3 *hit_tp = &ss_indirect->throughputs[ss_indirect->num_rays];
- PathRadianceState *hit_L_state = &ss_indirect->L_state[ss_indirect->num_rays];
-
- *hit_state = *state;
- *hit_ray = *ray;
- *hit_tp = *throughput;
- *hit_L_state = L->state;
-
- hit_state->rng_offset += PRNG_BOUNCE_NUM;
-
- if(kernel_path_surface_bounce(kg,
- sd,
- hit_tp,
- hit_state,
- hit_L_state,
- hit_ray))
- {
+ bool need_update_volume_stack = kernel_data.integrator.use_volumes &&
+ sd->object_flag & SD_OBJECT_INTERSECTS_VOLUME;
+# endif /* __VOLUME__ */
+
+ /* Closure memory will be overwritten, so read required variables now. */
+ Bssrdf *bssrdf = (Bssrdf *)sc;
+ ClosureType bssrdf_type = sc->type;
+ float bssrdf_roughness = bssrdf->roughness;
+
+ /* compute lighting with the BSDF closure */
+ for (int hit = 0; hit < num_hits; hit++) {
+ /* NOTE: We reuse the existing ShaderData, we assume the path
+ * integration loop stops when this function returns true.
+ */
+ subsurface_scatter_multi_setup(kg, &ss_isect, hit, sd, state, bssrdf_type, bssrdf_roughness);
+
+ kernel_path_surface_connect_light(kg, sd, emission_sd, *throughput, state, L);
+
+ ccl_addr_space PathState *hit_state = &ss_indirect->state[ss_indirect->num_rays];
+ ccl_addr_space Ray *hit_ray = &ss_indirect->rays[ss_indirect->num_rays];
+ ccl_addr_space float3 *hit_tp = &ss_indirect->throughputs[ss_indirect->num_rays];
+ PathRadianceState *hit_L_state = &ss_indirect->L_state[ss_indirect->num_rays];
+
+ *hit_state = *state;
+ *hit_ray = *ray;
+ *hit_tp = *throughput;
+ *hit_L_state = L->state;
+
+ hit_state->rng_offset += PRNG_BOUNCE_NUM;
+
+ if (kernel_path_surface_bounce(kg, sd, hit_tp, hit_state, hit_L_state, hit_ray)) {
# ifdef __LAMP_MIS__
- hit_state->ray_t = 0.0f;
-# endif /* __LAMP_MIS__ */
+ hit_state->ray_t = 0.0f;
+# endif /* __LAMP_MIS__ */
# ifdef __VOLUME__
- if(need_update_volume_stack) {
- Ray volume_ray = *ray;
- /* Setup ray from previous surface point to the new one. */
- volume_ray.D = normalize_len(hit_ray->P - volume_ray.P,
- &volume_ray.t);
-
- kernel_volume_stack_update_for_subsurface(
- kg,
- emission_sd,
- &volume_ray,
- hit_state->volume_stack);
- }
-# endif /* __VOLUME__ */
- ss_indirect->num_rays++;
- }
- }
- return true;
- }
- return false;
+ if (need_update_volume_stack) {
+ Ray volume_ray = *ray;
+ /* Setup ray from previous surface point to the new one. */
+ volume_ray.D = normalize_len(hit_ray->P - volume_ray.P, &volume_ray.t);
+
+ kernel_volume_stack_update_for_subsurface(
+ kg, emission_sd, &volume_ray, hit_state->volume_stack);
+ }
+# endif /* __VOLUME__ */
+ ss_indirect->num_rays++;
+ }
+ }
+ return true;
+ }
+ return false;
}
ccl_device_inline void kernel_path_subsurface_init_indirect(
- ccl_addr_space SubsurfaceIndirectRays *ss_indirect)
+ ccl_addr_space SubsurfaceIndirectRays *ss_indirect)
{
- ss_indirect->num_rays = 0;
+ ss_indirect->num_rays = 0;
}
ccl_device void kernel_path_subsurface_setup_indirect(
- KernelGlobals *kg,
- ccl_addr_space SubsurfaceIndirectRays *ss_indirect,
- ccl_addr_space PathState *state,
- ccl_addr_space Ray *ray,
- PathRadiance *L,
- ccl_addr_space float3 *throughput)
+ KernelGlobals *kg,
+ ccl_addr_space SubsurfaceIndirectRays *ss_indirect,
+ ccl_addr_space PathState *state,
+ ccl_addr_space Ray *ray,
+ PathRadiance *L,
+ ccl_addr_space float3 *throughput)
{
- /* Setup state, ray and throughput for indirect SSS rays. */
- ss_indirect->num_rays--;
+ /* Setup state, ray and throughput for indirect SSS rays. */
+ ss_indirect->num_rays--;
- path_radiance_sum_indirect(L);
- path_radiance_reset_indirect(L);
+ path_radiance_sum_indirect(L);
+ path_radiance_reset_indirect(L);
- *state = ss_indirect->state[ss_indirect->num_rays];
- *ray = ss_indirect->rays[ss_indirect->num_rays];
- L->state = ss_indirect->L_state[ss_indirect->num_rays];
- *throughput = ss_indirect->throughputs[ss_indirect->num_rays];
+ *state = ss_indirect->state[ss_indirect->num_rays];
+ *ray = ss_indirect->rays[ss_indirect->num_rays];
+ L->state = ss_indirect->L_state[ss_indirect->num_rays];
+ *throughput = ss_indirect->throughputs[ss_indirect->num_rays];
- state->rng_offset += ss_indirect->num_rays * PRNG_BOUNCE_NUM;
+ state->rng_offset += ss_indirect->num_rays * PRNG_BOUNCE_NUM;
}
-#endif /* __SUBSURFACE__ */
+#endif /* __SUBSURFACE__ */
CCL_NAMESPACE_END
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