forked from bartvdbraak/blender
66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/*
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* Copyright 2011-2015 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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CCL_NAMESPACE_BEGIN
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/* Shadow ray cast for AO. */
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ccl_device void kernel_shadow_blocked_ao(KernelGlobals *kg)
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{
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int lidx = ccl_local_id(1) * ccl_local_id(0) + ccl_local_id(0);
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ccl_local unsigned int ao_queue_length;
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if(lidx == 0) {
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ao_queue_length = kernel_split_params.queue_index[QUEUE_SHADOW_RAY_CAST_AO_RAYS];
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}
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ccl_barrier(CCL_LOCAL_MEM_FENCE);
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int ray_index = QUEUE_EMPTY_SLOT;
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int thread_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
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if(thread_index < ao_queue_length) {
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ray_index = get_ray_index(kg, thread_index, QUEUE_SHADOW_RAY_CAST_AO_RAYS,
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kernel_split_state.queue_data, kernel_split_params.queue_size, 1);
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}
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if(ray_index == QUEUE_EMPTY_SLOT)
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return;
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/* Flag determining if we need to update L. */
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char update_path_radiance = 0;
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if(IS_FLAG(kernel_split_state.ray_state, ray_index, RAY_SHADOW_RAY_CAST_AO)) {
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ccl_global PathState *state = &kernel_split_state.path_state[ray_index];
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ccl_global Ray *light_ray_global = &kernel_split_state.ao_light_ray[ray_index];
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float3 shadow;
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Ray ray = *light_ray_global;
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update_path_radiance = !(shadow_blocked(kg,
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&kernel_split_state.sd_DL_shadow[ray_index],
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state,
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&ray,
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&shadow));
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*light_ray_global = ray;
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/* We use light_ray_global's P and t to store shadow and
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* update_path_radiance.
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*/
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light_ray_global->P = shadow;
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light_ray_global->t = update_path_radiance;
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}
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}
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CCL_NAMESPACE_END
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