6e93e33294
but this makes it more reliable for now. Also add an integrator "Clamp" option, to clamp very light samples to a maximum value. This will reduce accuracy but may help reducing noise and speed up convergence.
134 lines
3.9 KiB
C++
134 lines
3.9 KiB
C++
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "device.h"
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#include "integrator.h"
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#include "scene.h"
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#include "sobol.h"
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#include "util_hash.h"
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CCL_NAMESPACE_BEGIN
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Integrator::Integrator()
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{
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min_bounce = 2;
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max_bounce = 7;
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max_diffuse_bounce = max_bounce;
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max_glossy_bounce = max_bounce;
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max_transmission_bounce = max_bounce;
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probalistic_termination = true;
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transparent_min_bounce = min_bounce;
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transparent_max_bounce = max_bounce;
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transparent_probalistic = true;
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transparent_shadows = false;
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no_caustics = false;
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seed = 0;
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layer_flag = ~0;
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sample_clamp = 0.0f;
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need_update = true;
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}
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Integrator::~Integrator()
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{
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}
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void Integrator::device_update(Device *device, DeviceScene *dscene)
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{
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if(!need_update)
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return;
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device_free(device, dscene);
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KernelIntegrator *kintegrator = &dscene->data.integrator;
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/* integrator parameters */
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kintegrator->max_bounce = max_bounce + 1;
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if(probalistic_termination)
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kintegrator->min_bounce = min_bounce + 1;
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else
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kintegrator->min_bounce = kintegrator->max_bounce;
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kintegrator->max_diffuse_bounce = max_diffuse_bounce + 1;
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kintegrator->max_glossy_bounce = max_glossy_bounce + 1;
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kintegrator->max_transmission_bounce = max_transmission_bounce + 1;
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kintegrator->transparent_max_bounce = transparent_max_bounce + 1;
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if(transparent_probalistic)
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kintegrator->transparent_min_bounce = transparent_min_bounce + 1;
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else
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kintegrator->transparent_min_bounce = kintegrator->transparent_max_bounce;
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kintegrator->transparent_shadows = transparent_shadows;
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kintegrator->no_caustics = no_caustics;
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kintegrator->seed = hash_int(seed);
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kintegrator->layer_flag = layer_flag << PATH_RAY_LAYER_SHIFT;
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kintegrator->use_ambient_occlusion =
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((dscene->data.film.pass_flag & PASS_AO) || dscene->data.background.ao_factor != 0.0f);
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kintegrator->sample_clamp = (sample_clamp == 0.0f)? FLT_MAX: sample_clamp*3.0f;
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/* sobol directions table */
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int dimensions = PRNG_BASE_NUM + (max_bounce + transparent_max_bounce + 2)*PRNG_BOUNCE_NUM;
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uint *directions = dscene->sobol_directions.resize(SOBOL_BITS*dimensions);
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sobol_generate_direction_vectors((uint(*)[SOBOL_BITS])directions, dimensions);
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device->tex_alloc("__sobol_directions", dscene->sobol_directions);
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need_update = false;
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}
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void Integrator::device_free(Device *device, DeviceScene *dscene)
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{
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device->tex_free(dscene->sobol_directions);
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dscene->sobol_directions.clear();
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}
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bool Integrator::modified(const Integrator& integrator)
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{
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return !(min_bounce == integrator.min_bounce &&
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max_bounce == integrator.max_bounce &&
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max_diffuse_bounce == integrator.max_diffuse_bounce &&
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max_glossy_bounce == integrator.max_glossy_bounce &&
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max_transmission_bounce == integrator.max_transmission_bounce &&
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probalistic_termination == integrator.probalistic_termination &&
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transparent_min_bounce == integrator.transparent_min_bounce &&
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transparent_max_bounce == integrator.transparent_max_bounce &&
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transparent_probalistic == integrator.transparent_probalistic &&
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transparent_shadows == integrator.transparent_shadows &&
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no_caustics == integrator.no_caustics &&
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layer_flag == integrator.layer_flag &&
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seed == integrator.seed &&
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sample_clamp == integrator.sample_clamp);
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}
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void Integrator::tag_update(Scene *scene)
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{
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need_update = true;
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}
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CCL_NAMESPACE_END
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