blender/intern/cycles/render/integrator.cpp
Brecht Van Lommel 4ba456d175 Cycles: first step for implementation of non-progressive sampler that handles
direct and indirect lighting differently. Rather than picking one light for each
point on the path, it now loops over all lights for direct lighting. For indirect
lighting it still picks a random light each time.

It gives control over the number of AA samples, and the number of Diffuse, Glossy,
Transmission, AO, Mesh Light, Background and Lamp samples for each AA sample.

This helps tuning render performance/noise and tends to give less noise for renders
dominated by direct lighting.

This sampling mode only works on the CPU, and still needs proper tile rendering
to show progress (will follow tommorrow or so), because each AA sample can be quite
slow now and so the delay between each update wil be too long.
2012-06-13 11:44:48 +00:00

174 lines
5.2 KiB
C++

/*
* 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 "light.h"
#include "scene.h"
#include "sobol.h"
#include "util_foreach.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;
filter_glossy = 0.0f;
seed = 0;
layer_flag = ~0;
sample_clamp = 0.0f;
motion_blur = false;
diffuse_samples = 1;
glossy_samples = 1;
transmission_samples = 1;
ao_samples = 1;
mesh_light_samples = 1;
progressive = true;
need_update = true;
}
Integrator::~Integrator()
{
}
void Integrator::device_update(Device *device, DeviceScene *dscene, Scene *scene)
{
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->filter_glossy = (filter_glossy == 0.0f)? FLT_MAX: 1.0f/filter_glossy;
kintegrator->seed = hash_int(seed);
kintegrator->layer_flag = layer_flag << PATH_RAY_LAYER_SHIFT;
kintegrator->use_ambient_occlusion =
((dscene->data.film.pass_flag & PASS_AO) || dscene->data.background.ao_factor != 0.0f);
kintegrator->sample_clamp = (sample_clamp == 0.0f)? FLT_MAX: sample_clamp*3.0f;
kintegrator->progressive = progressive;
kintegrator->diffuse_samples = diffuse_samples;
kintegrator->glossy_samples = glossy_samples;
kintegrator->transmission_samples = transmission_samples;
kintegrator->ao_samples = ao_samples;
kintegrator->mesh_light_samples = mesh_light_samples;
/* sobol directions table */
int max_samples = 1;
if(!progressive) {
foreach(Light *light, scene->lights)
max_samples = max(max_samples, light->samples);
max_samples = max(max_samples, max(diffuse_samples, max(glossy_samples, transmission_samples)));
max_samples = max(max_samples, max(ao_samples, mesh_light_samples));
}
max_samples *= (max_bounce + transparent_max_bounce + 2);
int dimensions = PRNG_BASE_NUM + max_samples*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 &&
filter_glossy == integrator.filter_glossy &&
layer_flag == integrator.layer_flag &&
seed == integrator.seed &&
sample_clamp == integrator.sample_clamp &&
progressive == integrator.progressive &&
diffuse_samples == integrator.diffuse_samples &&
glossy_samples == integrator.glossy_samples &&
transmission_samples == integrator.transmission_samples &&
ao_samples == integrator.ao_samples &&
mesh_light_samples == integrator.mesh_light_samples &&
motion_blur == integrator.motion_blur);
}
void Integrator::tag_update(Scene *scene)
{
need_update = true;
}
CCL_NAMESPACE_END