Brecht Van Lommel
7f86afec9d
This is more important now that we will have tigther volume bounds that we hit multiple times. It also avoids some noise due to RR previously affecting these surfaces, which shouldn't have been the case and should eventually be fixed for transparent BSDFs as well. For non-volume scenes I found no performance impact on NVIDIA or AMD. For volume scenes the noise decrease and fixed artifacts are worth the little extra render time, when there is any.
79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
/*
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* Copyright 2011-2017 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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/* This kernel sets up the ShaderData structure from the values computed
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* by the previous kernels.
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*
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* It also identifies the rays of state RAY_TO_REGENERATE and enqueues them
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* in QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS queue.
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*/
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ccl_device void kernel_shader_setup(KernelGlobals *kg,
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ccl_local_param unsigned int *local_queue_atomics)
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{
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/* Enqeueue RAY_TO_REGENERATE rays into QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS queue. */
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if(ccl_local_id(0) == 0 && ccl_local_id(1) == 0) {
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*local_queue_atomics = 0;
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}
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ccl_barrier(CCL_LOCAL_MEM_FENCE);
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int ray_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
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int queue_index = kernel_split_params.queue_index[QUEUE_ACTIVE_AND_REGENERATED_RAYS];
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if(ray_index >= queue_index) {
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return;
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}
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ray_index = get_ray_index(kg, ray_index,
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QUEUE_ACTIVE_AND_REGENERATED_RAYS,
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kernel_split_state.queue_data,
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kernel_split_params.queue_size,
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0);
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if(ray_index == QUEUE_EMPTY_SLOT) {
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return;
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}
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char enqueue_flag = (IS_STATE(kernel_split_state.ray_state, ray_index, RAY_TO_REGENERATE)) ? 1 : 0;
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enqueue_ray_index_local(ray_index,
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QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS,
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enqueue_flag,
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kernel_split_params.queue_size,
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local_queue_atomics,
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kernel_split_state.queue_data,
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kernel_split_params.queue_index);
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/* Continue on with shader evaluation. */
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if(IS_STATE(kernel_split_state.ray_state, ray_index, RAY_ACTIVE)) {
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Intersection isect = kernel_split_state.isect[ray_index];
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Ray ray = kernel_split_state.ray[ray_index];
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ShaderData *sd = kernel_split_sd(sd, ray_index);
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shader_setup_from_ray(kg,
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sd,
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&isect,
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&ray);
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#ifdef __VOLUME__
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if(sd->flag & SD_HAS_ONLY_VOLUME) {
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ASSIGN_RAY_STATE(kernel_split_state.ray_state, ray_index, RAY_HAS_ONLY_VOLUME);
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}
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#endif
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}
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}
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CCL_NAMESPACE_END
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