forked from bartvdbraak/blender
e7915ea6eb
It was mainly unfinished code for volume in a split kernel which should be done differently anyway to avoid such a code copy-paste. The code didn't really work, so likely nobody will cry.
84 lines
3.9 KiB
C
84 lines
3.9 KiB
C
/*
|
|
* Copyright 2011-2015 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.
|
|
*/
|
|
|
|
#include "kernel_split_common.h"
|
|
|
|
/* Note on kernel_lamp_emission
|
|
* This is the 3rd kernel in the ray-tracing logic. This is the second of the
|
|
* path-iteration kernels. This kernel takes care of the indirect lamp emission logic.
|
|
* This kernel operates on QUEUE_ACTIVE_AND_REGENERATED_RAYS. It processes rays of state RAY_ACTIVE
|
|
* and RAY_HIT_BACKGROUND.
|
|
* We will empty QUEUE_ACTIVE_AND_REGENERATED_RAYS queue in this kernel.
|
|
* The input/output of the kernel is as follows,
|
|
* Throughput_coop ------------------------------------|--- kernel_lamp_emission --|--- PathRadiance_coop
|
|
* Ray_coop -------------------------------------------| |--- Queue_data(QUEUE_ACTIVE_AND_REGENERATED_RAYS)
|
|
* PathState_coop -------------------------------------| |--- Queue_index(QUEUE_ACTIVE_AND_REGENERATED_RAYS)
|
|
* kg (globals) ---------------------------------------| |
|
|
* Intersection_coop ----------------------------------| |
|
|
* ray_state ------------------------------------------| |
|
|
* Queue_data (QUEUE_ACTIVE_AND_REGENERATED_RAYS) -----| |
|
|
* Queue_index (QUEUE_ACTIVE_AND_REGENERATED_RAYS) ----| |
|
|
* queuesize ------------------------------------------| |
|
|
* use_queues_flag ------------------------------------| |
|
|
* sw -------------------------------------------------| |
|
|
* sh -------------------------------------------------| |
|
|
*/
|
|
ccl_device void kernel_lamp_emission(
|
|
KernelGlobals *kg,
|
|
ccl_global float3 *throughput_coop, /* Required for lamp emission */
|
|
PathRadiance *PathRadiance_coop, /* Required for lamp emission */
|
|
ccl_global Ray *Ray_coop, /* Required for lamp emission */
|
|
ccl_global PathState *PathState_coop, /* Required for lamp emission */
|
|
Intersection *Intersection_coop, /* Required for lamp emission */
|
|
ccl_global char *ray_state, /* Denotes the state of each ray */
|
|
int sw, int sh,
|
|
ccl_global char *use_queues_flag, /* Used to decide if this kernel should use
|
|
* queues to fetch ray index
|
|
*/
|
|
int ray_index)
|
|
{
|
|
if(IS_STATE(ray_state, ray_index, RAY_ACTIVE) ||
|
|
IS_STATE(ray_state, ray_index, RAY_HIT_BACKGROUND))
|
|
{
|
|
PathRadiance *L = &PathRadiance_coop[ray_index];
|
|
ccl_global PathState *state = &PathState_coop[ray_index];
|
|
|
|
float3 throughput = throughput_coop[ray_index];
|
|
Ray ray = Ray_coop[ray_index];
|
|
|
|
#ifdef __LAMP_MIS__
|
|
if(kernel_data.integrator.use_lamp_mis && !(state->flag & PATH_RAY_CAMERA)) {
|
|
/* ray starting from previous non-transparent bounce */
|
|
Ray light_ray;
|
|
|
|
light_ray.P = ray.P - state->ray_t*ray.D;
|
|
state->ray_t += Intersection_coop[ray_index].t;
|
|
light_ray.D = ray.D;
|
|
light_ray.t = state->ray_t;
|
|
light_ray.time = ray.time;
|
|
light_ray.dD = ray.dD;
|
|
light_ray.dP = ray.dP;
|
|
/* intersect with lamp */
|
|
float3 emission;
|
|
|
|
if(indirect_lamp_emission(kg, state, &light_ray, &emission)) {
|
|
path_radiance_accum_emission(L, throughput, emission, state->bounce);
|
|
}
|
|
}
|
|
#endif /* __LAMP_MIS__ */
|
|
}
|
|
}
|