void VisIntegrator::integrate()
{
const size_t samp_dim = 8;
RNG rng;
ImageSampler image_sampler(spp, image->width, image->height);
// Sample array
Array<float> samps;
samps.resize(RAYS_AT_A_TIME * samp_dim);
// Sample pixel coordinate array
Array<uint16_t> coords;
coords.resize(RAYS_AT_A_TIME * 2);
// Light path array
Array<VisPath> paths;
paths.resize(RAYS_AT_A_TIME);
// Ray and Intersection arrays
Array<Ray> rays(RAYS_AT_A_TIME);
Array<Intersection> intersections(RAYS_AT_A_TIME);
// ids corresponding to the rays
Array<uint32_t> ids(RAYS_AT_A_TIME);
bool last = false;
while (true) {
// Generate a bunch of samples
std::cout << "\t--------\n\tGenerating samples" << std::endl;
std::cout.flush();
for (int i = 0; i < RAYS_AT_A_TIME; i++) {
if (!image_sampler.get_next_sample(samp_dim, &(samps[i*samp_dim]), &(coords[i*2]))) {
samps.resize(i*samp_dim);
paths.resize(i);
last = true;
break;
} else {
paths[i].done = false;
}
}
uint32_t ssize = samps.size() / samp_dim;
// Size the ray buffer appropriately
rays.resize(ssize);
// Generate a bunch of camera rays
std::cout << "\tGenerating camera rays" << std::endl;
std::cout.flush();
for (uint32_t i = 0; i < ssize; i++) {
float rx = (samps[i*samp_dim] - 0.5) * (image->max_x - image->min_x);
float ry = (0.5 - samps[i*samp_dim+1]) * (image->max_y - image->min_y);
float dx = (image->max_x - image->min_x) / image->width;
float dy = (image->max_y - image->min_y) / image->height;
rays[i] = scene->camera->generate_ray(rx, ry, dx, dy, samps[i*samp_dim+4], samps[i*samp_dim+2], samps[i*samp_dim+3]);
rays[i].finalize();
ids[i] = i;
}
// Trace the camera rays
std::cout << "\tTracing camera rays" << std::endl;
std::cout.flush();
tracer->trace(rays, &intersections);
// Update paths
std::cout << "\tUpdating paths" << std::endl;
std::cout.flush();
uint32_t rsize = rays.size();
for (uint32_t i = 0; i < rsize; i++) {
if (intersections[i].hit) {
// Ray hit something! Store intersection data
paths[ids[i]].done = true;
paths[ids[i]].col = intersections[i].col;
} else {
// Ray didn't hit anything, done and black background
paths[ids[i]].done = true;
paths[ids[i]].col = Color(0.0, 0.0, 0.0);
}
}
// Accumulate the samples
std::cout << "\tAccumulating samples" << std::endl;
std::cout.flush();
for (size_t i = 0; i < ssize; i++) {
image->add_sample(paths[i].col, coords[i*2], coords[i*2+1]);
}
// Print percentage complete
static int32_t last_perc = -1;
int32_t perc = image_sampler.percentage() * 100;
if (perc > last_perc) {
std::cout << perc << "%" << std::endl;
last_perc = perc;
}
if (callback)
callback();
if (last)
break;
}
}
void DirectLightingIntegrator::integrate()
{
const size_t samp_dim = 8;
RNG rng;
ImageSampler image_sampler(spp, image->width, image->height);
// Sample array
Array<float> samps(RAYS_AT_A_TIME * samp_dim);
// Sample pixel coordinate array
Array<uint16_t> coords(RAYS_AT_A_TIME * 2);
// Light path array
Array<DLPath> paths(RAYS_AT_A_TIME);
// Ray and Intersection arrays
Array<Ray> rays(RAYS_AT_A_TIME);
Array<Intersection> intersections(RAYS_AT_A_TIME);
// ids corresponding to the rays
Array<uint32_t> ids(RAYS_AT_A_TIME);
bool last = false;
while (true) {
// Generate a bunch of samples
std::cout << "\t--------\n\tGenerating samples" << std::endl;
std::cout.flush();
for (int i = 0; i < RAYS_AT_A_TIME; i++) {
if (!image_sampler.get_next_sample(samp_dim, &(samps[i*samp_dim]), &(coords[i*2]))) {
samps.resize(i*samp_dim);
paths.resize(i);
last = true;
break;
} else {
paths[i].done = false;
}
}
uint32_t ssize = samps.size() / samp_dim;
// Size the ray buffer appropriately
rays.resize(ssize);
// Generate a bunch of camera rays
std::cout << "\tGenerating camera rays" << std::endl;
std::cout.flush();
for (uint32_t i = 0; i < ssize; i++) {
float rx = (samps[i*samp_dim] - 0.5) * (image->max_x - image->min_x);
float ry = (0.5 - samps[i*samp_dim+1]) * (image->max_y - image->min_y);
float dx = (image->max_x - image->min_x) / image->width;
float dy = (image->max_y - image->min_y) / image->height;
rays[i] = scene->camera->generate_ray(rx, ry, dx, dy, samps[i*samp_dim+4], samps[i*samp_dim+2], samps[i*samp_dim+3]);
rays[i].finalize();
ids[i] = i;
}
// Trace the camera rays
std::cout << "\tTracing camera rays" << std::endl;
std::cout.flush();
tracer->trace(rays, &intersections);
// Update paths
std::cout << "\tUpdating paths" << std::endl;
std::cout.flush();
uint32_t rsize = rays.size();
for (uint32_t i = 0; i < rsize; i++) {
if (intersections[i].hit) {
// Ray hit something! Store intersection data
paths[ids[i]].inter = intersections[i];
} else {
// Ray didn't hit anything, done and black background
paths[ids[i]].done = true;
paths[ids[i]].col = Color(0.0, 0.0, 0.0);
}
}
// Generate a bunch of shadow rays
std::cout << "\tGenerating shadow rays" << std::endl;
std::cout.flush();
uint32_t sri = 0; // Shadow ray index
for (uint32_t i = 0; i < ssize; i++) {
if (!paths[i].done) {
// Select a light and store the normalization factor for it's output
Light *lighty = scene->finite_lights[(uint32_t)(samps[i*samp_dim+5] * scene->finite_lights.size()) % scene->finite_lights.size()];
// Sample the light source
Vec3 ld;
paths[i].lcol = lighty->sample(intersections[i].p, samps[i*samp_dim+6], samps[i*samp_dim+7], rays[i].time, &ld)
* (float)(scene->finite_lights.size());
// Create a shadow ray for this path
float d = ld.length();
ld.normalize();
rays[sri].o = paths[i].inter.p + paths[i].inter.offset;
rays[sri].d = ld;
rays[sri].time = samps[i*samp_dim+4];
rays[sri].is_shadow_ray = true;
rays[sri].ow = paths[i].inter.owp();
rays[sri].dw = 0.0f;
//rays[sri].has_differentials = false;
rays[sri].max_t = d;
rays[sri].finalize();
ids[sri] = i;
// Increment shadow ray index
sri++;
}
}
rays.resize(sri);
// Trace the shadow rays
std::cout << "\tTracing shadow rays" << std::endl;
std::cout.flush();
tracer->trace(rays, &intersections);
// Calculate sample colors
std::cout << "\tCalculating sample colors" << std::endl;
std::cout.flush();
rsize = rays.size();
for (uint32_t i = 0; i < rsize; i++) {
uint32_t id = ids[i];
if (intersections[i].hit) {
// Sample was shadowed
paths[id].done = true;
paths[id].col = Color(0.0, 0.0, 0.0);
} else {
// Sample was lit
paths[id].inter.n.normalize();
float lambert = dot(rays[i].d, paths[id].inter.n);
if (lambert < 0.0) lambert = 0.0;
paths[id].col = paths[id].lcol * lambert;
}
}
// Print percentage complete
static int32_t last_perc = -1;
int32_t perc = image_sampler.percentage() * 100;
if (perc > last_perc) {
std::cout << perc << "%" << std::endl;
last_perc = perc;
}
if (!Config::no_output) {
// Accumulate the samples
std::cout << "\tAccumulating samples" << std::endl;
std::cout.flush();
for (size_t i = 0; i < ssize; i++) {
image->add_sample(paths[i].col, coords[i*2], coords[i*2+1]);
}
if (callback)
callback();
}
if (last)
break;
}
}
