diff options
Diffstat (limited to 'intern/cycles/kernel/split/kernel_do_volume.h')
| -rw-r--r-- | intern/cycles/kernel/split/kernel_do_volume.h | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/intern/cycles/kernel/split/kernel_do_volume.h b/intern/cycles/kernel/split/kernel_do_volume.h deleted file mode 100644 index 1775e870f07..00000000000 --- a/intern/cycles/kernel/split/kernel_do_volume.h +++ /dev/null @@ -1,227 +0,0 @@ -/* - * Copyright 2011-2017 Blender Foundation - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -CCL_NAMESPACE_BEGIN - -#if defined(__BRANCHED_PATH__) && defined(__VOLUME__) - -ccl_device_inline void kernel_split_branched_path_volume_indirect_light_init(KernelGlobals *kg, - int ray_index) -{ - kernel_split_branched_path_indirect_loop_init(kg, ray_index); - - ADD_RAY_FLAG(kernel_split_state.ray_state, ray_index, RAY_BRANCHED_VOLUME_INDIRECT); -} - -ccl_device_noinline bool kernel_split_branched_path_volume_indirect_light_iter(KernelGlobals *kg, - int ray_index) -{ - SplitBranchedState *branched_state = &kernel_split_state.branched_state[ray_index]; - - ShaderData *sd = kernel_split_sd(sd, ray_index); - PathRadiance *L = &kernel_split_state.path_radiance[ray_index]; - ShaderData *emission_sd = AS_SHADER_DATA(&kernel_split_state.sd_DL_shadow[ray_index]); - - /* GPU: no decoupled ray marching, scatter probabilistically. */ - int num_samples = kernel_data.integrator.volume_samples; - float num_samples_inv = 1.0f / num_samples; - - Ray volume_ray = branched_state->ray; - volume_ray.t = (!IS_STATE(&branched_state->ray_state, 0, RAY_HIT_BACKGROUND)) ? - branched_state->isect.t : - FLT_MAX; - - float step_size = volume_stack_step_size(kg, branched_state->path_state.volume_stack); - - for (int j = branched_state->next_sample; j < num_samples; j++) { - ccl_global PathState *ps = &kernel_split_state.path_state[ray_index]; - *ps = branched_state->path_state; - - ccl_global Ray *pray = &kernel_split_state.ray[ray_index]; - *pray = branched_state->ray; - - ccl_global float3 *tp = &kernel_split_state.throughput[ray_index]; - *tp = branched_state->throughput * num_samples_inv; - - /* branch RNG state */ - path_state_branch(ps, j, num_samples); - - /* integrate along volume segment with distance sampling */ - VolumeIntegrateResult result = kernel_volume_integrate( - kg, ps, sd, &volume_ray, L, tp, step_size); - -# ifdef __VOLUME_SCATTER__ - if (result == VOLUME_PATH_SCATTERED) { - /* direct lighting */ - kernel_path_volume_connect_light(kg, sd, emission_sd, *tp, &branched_state->path_state, L); - - /* indirect light bounce */ - if (!kernel_path_volume_bounce(kg, sd, tp, ps, &L->state, pray)) { - continue; - } - - /* start the indirect path */ - branched_state->next_closure = 0; - branched_state->next_sample = j + 1; - - /* Attempting to share too many samples is slow for volumes as it causes us to - * loop here more and have many calls to kernel_volume_integrate which evaluates - * shaders. The many expensive shader evaluations cause the work load to become - * unbalanced and many threads to become idle in this kernel. Limiting the - * number of shared samples here helps quite a lot. - */ - if (branched_state->shared_sample_count < 2) { - if (kernel_split_branched_indirect_start_shared(kg, ray_index)) { - continue; - } - } - - return true; - } -# endif - } - - branched_state->next_sample = num_samples; - - branched_state->waiting_on_shared_samples = (branched_state->shared_sample_count > 0); - if (branched_state->waiting_on_shared_samples) { - return true; - } - - kernel_split_branched_path_indirect_loop_end(kg, ray_index); - - /* todo: avoid this calculation using decoupled ray marching */ - float3 throughput = kernel_split_state.throughput[ray_index]; - kernel_volume_shadow( - kg, emission_sd, &kernel_split_state.path_state[ray_index], &volume_ray, &throughput); - kernel_split_state.throughput[ray_index] = throughput; - - return false; -} - -#endif /* __BRANCHED_PATH__ && __VOLUME__ */ - -ccl_device void kernel_do_volume(KernelGlobals *kg) -{ -#ifdef __VOLUME__ - /* We will empty this queue in this kernel. */ - if (ccl_global_id(0) == 0 && ccl_global_id(1) == 0) { - kernel_split_params.queue_index[QUEUE_ACTIVE_AND_REGENERATED_RAYS] = 0; -# ifdef __BRANCHED_PATH__ - kernel_split_params.queue_index[QUEUE_VOLUME_INDIRECT_ITER] = 0; -# endif /* __BRANCHED_PATH__ */ - } - - int ray_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0); - - if (*kernel_split_params.use_queues_flag) { - ray_index = get_ray_index(kg, - ray_index, - QUEUE_ACTIVE_AND_REGENERATED_RAYS, - kernel_split_state.queue_data, - kernel_split_params.queue_size, - 1); - } - - ccl_global char *ray_state = kernel_split_state.ray_state; - - PathRadiance *L = &kernel_split_state.path_radiance[ray_index]; - ccl_global PathState *state = &kernel_split_state.path_state[ray_index]; - - if (IS_STATE(ray_state, ray_index, RAY_ACTIVE) || - IS_STATE(ray_state, ray_index, RAY_HIT_BACKGROUND)) { - ccl_global float3 *throughput = &kernel_split_state.throughput[ray_index]; - ccl_global Ray *ray = &kernel_split_state.ray[ray_index]; - ccl_global Intersection *isect = &kernel_split_state.isect[ray_index]; - ShaderData *sd = kernel_split_sd(sd, ray_index); - ShaderData *emission_sd = AS_SHADER_DATA(&kernel_split_state.sd_DL_shadow[ray_index]); - - bool hit = !IS_STATE(ray_state, ray_index, RAY_HIT_BACKGROUND); - - /* Sanitize volume stack. */ - if (!hit) { - kernel_volume_clean_stack(kg, state->volume_stack); - } - /* volume attenuation, emission, scatter */ - if (state->volume_stack[0].shader != SHADER_NONE) { - Ray volume_ray = *ray; - volume_ray.t = (hit) ? isect->t : FLT_MAX; - -# ifdef __BRANCHED_PATH__ - if (!kernel_data.integrator.branched || - IS_FLAG(ray_state, ray_index, RAY_BRANCHED_INDIRECT)) { -# endif /* __BRANCHED_PATH__ */ - float step_size = volume_stack_step_size(kg, state->volume_stack); - - { - /* integrate along volume segment with distance sampling */ - VolumeIntegrateResult result = kernel_volume_integrate( - kg, state, sd, &volume_ray, L, throughput, step_size); - -# ifdef __VOLUME_SCATTER__ - if (result == VOLUME_PATH_SCATTERED) { - /* direct lighting */ - kernel_path_volume_connect_light(kg, sd, emission_sd, *throughput, state, L); - - /* indirect light bounce */ - if (kernel_path_volume_bounce(kg, sd, throughput, state, &L->state, ray)) { - ASSIGN_RAY_STATE(ray_state, ray_index, RAY_REGENERATED); - } - else { - kernel_split_path_end(kg, ray_index); - } - } -# endif /* __VOLUME_SCATTER__ */ - } - -# ifdef __BRANCHED_PATH__ - } - else { - kernel_split_branched_path_volume_indirect_light_init(kg, ray_index); - - if (kernel_split_branched_path_volume_indirect_light_iter(kg, ray_index)) { - ASSIGN_RAY_STATE(ray_state, ray_index, RAY_REGENERATED); - } - } -# endif /* __BRANCHED_PATH__ */ - } - } - -# ifdef __BRANCHED_PATH__ - /* iter loop */ - ray_index = get_ray_index(kg, - ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0), - QUEUE_VOLUME_INDIRECT_ITER, - kernel_split_state.queue_data, - kernel_split_params.queue_size, - 1); - - if (IS_STATE(ray_state, ray_index, RAY_VOLUME_INDIRECT_NEXT_ITER)) { - /* for render passes, sum and reset indirect light pass variables - * for the next samples */ - path_radiance_sum_indirect(&kernel_split_state.path_radiance[ray_index]); - path_radiance_reset_indirect(&kernel_split_state.path_radiance[ray_index]); - - if (kernel_split_branched_path_volume_indirect_light_iter(kg, ray_index)) { - ASSIGN_RAY_STATE(ray_state, ray_index, RAY_REGENERATED); - } - } -# endif /* __BRANCHED_PATH__ */ - -#endif /* __VOLUME__ */ -} - -CCL_NAMESPACE_END |