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Differential D14664 Diff 55290 intern/cycles/kernel/integrator/shade_background.h

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intern/cycles/kernel/integrator/shade_background.h

/* SPDX-License-Identifier: Apache-2.0 /* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */ * Copyright 2011-2022 Blender Foundation */
#pragma once #pragma once
#include "kernel/film/light_passes.h" #include "kernel/film/light_passes.h"
#include "kernel/integrator/surface_shader.h" #include "kernel/integrator/surface_shader.h"
#include "kernel/light/light.h" #include "kernel/light/light.h"
#include "kernel/light/light_tree.h"
#include "kernel/light/sample.h" #include "kernel/light/sample.h"
CCL_NAMESPACE_BEGIN CCL_NAMESPACE_BEGIN
ccl_device Spectrum integrator_eval_background_shader(KernelGlobals kg, ccl_device Spectrum integrator_eval_background_shader(KernelGlobals kg,
IntegratorState state, IntegratorState state,
ccl_global float *ccl_restrict render_buffer) ccl_global float *ccl_restrict render_buffer)
{ {
▲ Show 20 Lines • Show All 96 Lines • ▼ Show 20 Lines if (eval_background) {
if (!(INTEGRATOR_STATE(state, path, flag) & PATH_RAY_MIS_SKIP) && if (!(INTEGRATOR_STATE(state, path, flag) & PATH_RAY_MIS_SKIP) &&
kernel_data.background.use_mis) { kernel_data.background.use_mis) {
const float3 ray_P = INTEGRATOR_STATE(state, ray, P); const float3 ray_P = INTEGRATOR_STATE(state, ray, P);
const float3 ray_D = INTEGRATOR_STATE(state, ray, D); const float3 ray_D = INTEGRATOR_STATE(state, ray, D);
const float mis_ray_pdf = INTEGRATOR_STATE(state, path, mis_ray_pdf); const float mis_ray_pdf = INTEGRATOR_STATE(state, path, mis_ray_pdf);
/* multiple importance sampling, get background light pdf for ray /* multiple importance sampling, get background light pdf for ray
* direction, and compute weight with respect to BSDF pdf */ * direction, and compute weight with respect to BSDF pdf */
const float pdf = background_light_pdf(kg, ray_P, ray_D); float pdf = background_light_pdf(kg, ray_P, ray_D);
if (kernel_data.integrator.use_light_tree) {
const float3 N = INTEGRATOR_STATE(state, path, mis_origin_n);
pdf *= distant_lights_pdf(kg, ray_P, N, kernel_data.background.light_index);
}
mis_weight = light_sample_mis_weight_forward(kg, mis_ray_pdf, pdf); mis_weight = light_sample_mis_weight_forward(kg, mis_ray_pdf, pdf);
} }
L *= mis_weight; L *= mis_weight;
} }
/* Write to render buffer. */ /* Write to render buffer. */
film_write_background(kg, state, L, transparent, is_transparent_background_ray, render_buffer); film_write_background(kg, state, L, transparent, is_transparent_background_ray, render_buffer);
▲ Show 20 Lines • Show All 44 Lines • ▼ Show 20 Lines#endif /* __MNEE__ */
} }
/* MIS weighting. */ /* MIS weighting. */
float mis_weight = 1.0f; float mis_weight = 1.0f;
if (!(path_flag & PATH_RAY_MIS_SKIP)) { if (!(path_flag & PATH_RAY_MIS_SKIP)) {
/* multiple importance sampling, get regular light pdf, /* multiple importance sampling, get regular light pdf,
* and compute weight with respect to BSDF pdf */ * and compute weight with respect to BSDF pdf */
const float mis_ray_pdf = INTEGRATOR_STATE(state, path, mis_ray_pdf); const float mis_ray_pdf = INTEGRATOR_STATE(state, path, mis_ray_pdf);
mis_weight = light_sample_mis_weight_forward(kg, mis_ray_pdf, ls.pdf); if (kernel_data.integrator.use_light_tree) {
const float3 ray_P = INTEGRATOR_STATE(state, ray, P);
const float3 N = INTEGRATOR_STATE(state, path, mis_origin_n);
ls.pdf *= distant_lights_pdf(kg, ray_P, N, lamp);
}
const float mis_weight = light_sample_mis_weight_forward(kg, mis_ray_pdf, ls.pdf);
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ls.pdf *= distant_lights_pdf(kg, ray_P, N, lamp);
}
- const float mis_weight = light_sample_mis_weight_forward(kg, mis_ray_pdf, ls.pdf);
+ mis_weight = light_sample_mis_weight_forward(kg, mis_ray_pdf, ls.pdf);
}
/* Write to render buffer. */
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} }
/* Write to render buffer. */ /* Write to render buffer. */
film_write_surface_emission( film_write_surface_emission(
kg, state, light_eval, mis_weight, render_buffer, kernel_data.background.lightgroup); kg, state, light_eval, mis_weight, render_buffer, kernel_data.background.lightgroup);
} }
} }
} }
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