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