diff options
Diffstat (limited to 'intern/cycles/kernel/kernel_path_surface.h')
| -rw-r--r-- | intern/cycles/kernel/kernel_path_surface.h | 360 |
1 files changed, 0 insertions, 360 deletions
diff --git a/intern/cycles/kernel/kernel_path_surface.h b/intern/cycles/kernel/kernel_path_surface.h deleted file mode 100644 index ba48c0bdfc4..00000000000 --- a/intern/cycles/kernel/kernel_path_surface.h +++ /dev/null @@ -1,360 +0,0 @@ -/* - * Copyright 2011-2013 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(__SUBSURFACE__) || defined(__SHADOW_TRICKS__) || \ - defined(__BAKING__) -/* branched path tracing: connect path directly to position on one or more lights and add it to L - */ -ccl_device_noinline_cpu void kernel_branched_path_surface_connect_light( - KernelGlobals *kg, - ShaderData *sd, - ShaderData *emission_sd, - ccl_addr_space PathState *state, - float3 throughput, - float num_samples_adjust, - PathRadiance *L, - int sample_all_lights) -{ -# ifdef __EMISSION__ - /* sample illumination from lights to find path contribution */ - BsdfEval L_light ccl_optional_struct_init; - - int num_lights = 0; - if (kernel_data.integrator.use_direct_light) { - if (sample_all_lights) { - num_lights = kernel_data.integrator.num_all_lights; - if (kernel_data.integrator.pdf_triangles != 0.0f) { - num_lights += 1; - } - } - else { - num_lights = 1; - } - } - - for (int i = 0; i < num_lights; i++) { - /* sample one light at random */ - int num_samples = 1; - int num_all_lights = 1; - uint lamp_rng_hash = state->rng_hash; - bool double_pdf = false; - bool is_mesh_light = false; - bool is_lamp = false; - - if (sample_all_lights) { - /* lamp sampling */ - is_lamp = i < kernel_data.integrator.num_all_lights; - if (is_lamp) { - if (UNLIKELY(light_select_reached_max_bounces(kg, i, state->bounce))) { - continue; - } - num_samples = ceil_to_int(num_samples_adjust * light_select_num_samples(kg, i)); - num_all_lights = kernel_data.integrator.num_all_lights; - lamp_rng_hash = cmj_hash(state->rng_hash, i); - double_pdf = kernel_data.integrator.pdf_triangles != 0.0f; - } - /* mesh light sampling */ - else { - num_samples = ceil_to_int(num_samples_adjust * kernel_data.integrator.mesh_light_samples); - double_pdf = kernel_data.integrator.num_all_lights != 0; - is_mesh_light = true; - } - } - - float num_samples_inv = num_samples_adjust / (num_samples * num_all_lights); - - for (int j = 0; j < num_samples; j++) { - Ray light_ray ccl_optional_struct_init; - light_ray.t = 0.0f; /* reset ray */ -# ifdef __OBJECT_MOTION__ - light_ray.time = sd->time; -# endif - bool has_emission = false; - - if (kernel_data.integrator.use_direct_light && (sd->flag & SD_BSDF_HAS_EVAL)) { - float light_u, light_v; - path_branched_rng_2D( - kg, lamp_rng_hash, state, j, num_samples, PRNG_LIGHT_U, &light_u, &light_v); - float terminate = path_branched_rng_light_termination( - kg, lamp_rng_hash, state, j, num_samples); - - /* only sample triangle lights */ - if (is_mesh_light && double_pdf) { - light_u = 0.5f * light_u; - } - - LightSample ls ccl_optional_struct_init; - const int lamp = is_lamp ? i : -1; - if (light_sample(kg, lamp, light_u, light_v, sd->time, sd->P, state->bounce, &ls)) { - /* The sampling probability returned by lamp_light_sample assumes that all lights were - * sampled. However, this code only samples lamps, so if the scene also had mesh lights, - * the real probability is twice as high. */ - if (double_pdf) { - ls.pdf *= 2.0f; - } - - has_emission = direct_emission( - kg, sd, emission_sd, &ls, state, &light_ray, &L_light, &is_lamp, terminate); - } - } - - /* trace shadow ray */ - float3 shadow; - - const bool blocked = shadow_blocked(kg, sd, emission_sd, state, &light_ray, &shadow); - - if (has_emission) { - if (!blocked) { - /* accumulate */ - path_radiance_accum_light(kg, - L, - state, - throughput * num_samples_inv, - &L_light, - shadow, - num_samples_inv, - is_lamp); - } - else { - path_radiance_accum_total_light(L, state, throughput * num_samples_inv, &L_light); - } - } - } - } -# endif -} - -/* branched path tracing: bounce off or through surface to with new direction stored in ray */ -ccl_device bool kernel_branched_path_surface_bounce(KernelGlobals *kg, - ShaderData *sd, - const ShaderClosure *sc, - int sample, - int num_samples, - ccl_addr_space float3 *throughput, - ccl_addr_space PathState *state, - PathRadianceState *L_state, - ccl_addr_space Ray *ray, - float sum_sample_weight) -{ - /* sample BSDF */ - float bsdf_pdf; - BsdfEval bsdf_eval ccl_optional_struct_init; - float3 bsdf_omega_in ccl_optional_struct_init; - differential3 bsdf_domega_in ccl_optional_struct_init; - float bsdf_u, bsdf_v; - path_branched_rng_2D( - kg, state->rng_hash, state, sample, num_samples, PRNG_BSDF_U, &bsdf_u, &bsdf_v); - int label; - - label = shader_bsdf_sample_closure( - kg, sd, sc, bsdf_u, bsdf_v, &bsdf_eval, &bsdf_omega_in, &bsdf_domega_in, &bsdf_pdf); - - if (bsdf_pdf == 0.0f || bsdf_eval_is_zero(&bsdf_eval)) - return false; - - /* modify throughput */ - path_radiance_bsdf_bounce(kg, L_state, throughput, &bsdf_eval, bsdf_pdf, state->bounce, label); - -# ifdef __DENOISING_FEATURES__ - state->denoising_feature_weight *= sc->sample_weight / (sum_sample_weight * num_samples); -# endif - - /* modify path state */ - path_state_next(kg, state, label); - - /* setup ray */ - ray->P = ray_offset(sd->P, (label & LABEL_TRANSMIT) ? -sd->Ng : sd->Ng); - ray->D = normalize(bsdf_omega_in); - ray->t = FLT_MAX; -# ifdef __RAY_DIFFERENTIALS__ - ray->dP = sd->dP; - ray->dD = bsdf_domega_in; -# endif -# ifdef __OBJECT_MOTION__ - ray->time = sd->time; -# endif - -# ifdef __VOLUME__ - /* enter/exit volume */ - if (label & LABEL_TRANSMIT) - kernel_volume_stack_enter_exit(kg, sd, state->volume_stack); -# endif - - /* branch RNG state */ - path_state_branch(state, sample, num_samples); - - /* set MIS state */ - state->min_ray_pdf = fminf(bsdf_pdf, FLT_MAX); - state->ray_pdf = bsdf_pdf; -# ifdef __LAMP_MIS__ - state->ray_t = 0.0f; -# endif - - return true; -} - -#endif - -/* path tracing: connect path directly to position on a light and add it to L */ -ccl_device_inline void kernel_path_surface_connect_light(KernelGlobals *kg, - ShaderData *sd, - ShaderData *emission_sd, - float3 throughput, - ccl_addr_space PathState *state, - PathRadiance *L) -{ - PROFILING_INIT(kg, PROFILING_CONNECT_LIGHT); - -#ifdef __EMISSION__ -# ifdef __SHADOW_TRICKS__ - int all = (state->flag & PATH_RAY_SHADOW_CATCHER); - kernel_branched_path_surface_connect_light(kg, sd, emission_sd, state, throughput, 1.0f, L, all); -# else - /* sample illumination from lights to find path contribution */ - Ray light_ray ccl_optional_struct_init; - BsdfEval L_light ccl_optional_struct_init; - bool is_lamp = false; - bool has_emission = false; - - light_ray.t = 0.0f; -# ifdef __OBJECT_MOTION__ - light_ray.time = sd->time; -# endif - - if (kernel_data.integrator.use_direct_light && (sd->flag & SD_BSDF_HAS_EVAL)) { - float light_u, light_v; - path_state_rng_2D(kg, state, PRNG_LIGHT_U, &light_u, &light_v); - - LightSample ls ccl_optional_struct_init; - if (light_sample(kg, -1, light_u, light_v, sd->time, sd->P, state->bounce, &ls)) { - float terminate = path_state_rng_light_termination(kg, state); - has_emission = direct_emission( - kg, sd, emission_sd, &ls, state, &light_ray, &L_light, &is_lamp, terminate); - } - } - - /* trace shadow ray */ - float3 shadow; - - const bool blocked = shadow_blocked(kg, sd, emission_sd, state, &light_ray, &shadow); - - if (has_emission) { - if (!blocked) { - /* accumulate */ - path_radiance_accum_light(kg, L, state, throughput, &L_light, shadow, 1.0f, is_lamp); - } - else { - path_radiance_accum_total_light(L, state, throughput, &L_light); - } - } -# endif -#endif -} - -/* path tracing: bounce off or through surface to with new direction stored in ray */ -ccl_device bool kernel_path_surface_bounce(KernelGlobals *kg, - ShaderData *sd, - ccl_addr_space float3 *throughput, - ccl_addr_space PathState *state, - PathRadianceState *L_state, - ccl_addr_space Ray *ray) -{ - PROFILING_INIT(kg, PROFILING_SURFACE_BOUNCE); - - /* no BSDF? we can stop here */ - if (sd->flag & SD_BSDF) { - /* sample BSDF */ - float bsdf_pdf; - BsdfEval bsdf_eval ccl_optional_struct_init; - float3 bsdf_omega_in ccl_optional_struct_init; - differential3 bsdf_domega_in ccl_optional_struct_init; - float bsdf_u, bsdf_v; - path_state_rng_2D(kg, state, PRNG_BSDF_U, &bsdf_u, &bsdf_v); - int label; - - label = shader_bsdf_sample( - kg, sd, bsdf_u, bsdf_v, &bsdf_eval, &bsdf_omega_in, &bsdf_domega_in, &bsdf_pdf); - - if (bsdf_pdf == 0.0f || bsdf_eval_is_zero(&bsdf_eval)) - return false; - - /* modify throughput */ - path_radiance_bsdf_bounce(kg, L_state, throughput, &bsdf_eval, bsdf_pdf, state->bounce, label); - - /* set labels */ - if (!(label & LABEL_TRANSPARENT)) { - state->ray_pdf = bsdf_pdf; -#ifdef __LAMP_MIS__ - state->ray_t = 0.0f; -#endif - state->min_ray_pdf = fminf(bsdf_pdf, state->min_ray_pdf); - } - - /* update path state */ - path_state_next(kg, state, label); - - /* setup ray */ - ray->P = ray_offset(sd->P, (label & LABEL_TRANSMIT) ? -sd->Ng : sd->Ng); - ray->D = normalize(bsdf_omega_in); - - if (state->bounce == 0) - ray->t -= sd->ray_length; /* clipping works through transparent */ - else - ray->t = FLT_MAX; - -#ifdef __RAY_DIFFERENTIALS__ - ray->dP = sd->dP; - ray->dD = bsdf_domega_in; -#endif - -#ifdef __VOLUME__ - /* enter/exit volume */ - if (label & LABEL_TRANSMIT) - kernel_volume_stack_enter_exit(kg, sd, state->volume_stack); -#endif - return true; - } -#ifdef __VOLUME__ - else if (sd->flag & SD_HAS_ONLY_VOLUME) { - if (!path_state_volume_next(kg, state)) { - return false; - } - - if (state->bounce == 0) - ray->t -= sd->ray_length; /* clipping works through transparent */ - else - ray->t = FLT_MAX; - - /* setup ray position, direction stays unchanged */ - ray->P = ray_offset(sd->P, -sd->Ng); -# ifdef __RAY_DIFFERENTIALS__ - ray->dP = sd->dP; -# endif - - /* enter/exit volume */ - kernel_volume_stack_enter_exit(kg, sd, state->volume_stack); - return true; - } -#endif - else { - /* no bsdf or volume? */ - return false; - } -} - -CCL_NAMESPACE_END |