def run(self):
"""Execute the task."""
print "executing task %d/%d" % (self.task_num, self.task_count)
# get sub-sampler for SamplerRendererTask
sampler = self.main_sampler.get_sub_sampler(self.task_num,
self.task_count)
if not sampler:
return
# Declare local variables used for rendering loop
rng = RNG(self.task_num)
# allocate space for samples and intersections
max_samples = sampler.maximum_sample_count()
samples = self.orig_sample.duplicate(max_samples)
rays = [None] * max_samples
Ls = [None] * max_samples
Ts = [None] * max_samples
isects = [] # Intersection[max_samples]
for i in range(max_samples):
isects.append(Intersection())
# get samples from Sampler and update image
while True:
sample_count = sampler.get_more_samples(samples, rng)
# if no more samples to compute, exit
if sample_count <= 0:
break
# generate camera rays and compute radiance along rays
for i in range(sample_count):
# find camera ray for samples[i]
ray_weight, ray_diff = self.camera.generate_ray_differential(
samples[i])
rays[i] = ray_diff
coeff = 1.0 / math.sqrt(sampler.samples_per_pixel)
ray_diff.scale_differentials(coeff)
# evaluate radiance along camera ray
if ray_weight > 0.0:
radiance, intersection, Ts_i = \
self.renderer.Li(self.scene,
ray_diff,
samples[i],
rng,
isects[i])
Ls_i = ray_weight * radiance
else:
Ls_i = Spectrum(0.0)
Ts_i = Spectrum(1.0)
Ls[i] = Ls_i
Ts[i] = Ts_i
# check for unexpected radiance values
if Ls_i.has_nan():
logger.error(
"Not-a-number radiance value returned for image sample. Setting to black."
)
Ls_i = Spectrum(0.0)
elif Ls_i.y() < -1e-5:
logger.error(
"Negative luminance value, %f, returned for image sample. Setting to black."
% Ls_i.y())
Ls_i = Spectrum(0.0)
elif Ls_i.y() == float('inf'):
logger.error(
"Infinite luminance value returned for image sample. Setting to black."
)
Ls_i = Spectrum(0.0)
# report sample results to Sampler, add contributions to image
if sampler.report_results(samples, rays, Ls, isects, sample_count):
for i in range(sample_count):
self.camera.film.add_sample(samples[i], Ls[i])
# clean up after SamplerRendererTask is done with its image region
pass
def run(self):
"""Execute the task."""
print "executing task %d/%d" % (self.task_num, self.task_count)
# get sub-sampler for SamplerRendererTask
sampler = self.main_sampler.get_sub_sampler(self.task_num,
self.task_count)
if not sampler:
return
# Declare local variables used for rendering loop
rng = RNG(self.task_num)
# allocate space for samples and intersections
max_samples = sampler.maximum_sample_count()
samples = self.orig_sample.duplicate(max_samples)
rays = [None] * max_samples
Ls = [None] * max_samples
Ts = [None] * max_samples
isects = [] # Intersection[max_samples]
for i in range(max_samples):
isects.append(Intersection())
# get samples from Sampler and update image
while True:
sample_count = sampler.get_more_samples(samples, rng)
# if no more samples to compute, exit
if sample_count <= 0:
break
# generate camera rays and compute radiance along rays
for i in range(sample_count):
# find camera ray for samples[i]
ray_weight, ray_diff = self.camera.generate_ray_differential(samples[i])
rays[i] = ray_diff
coeff = 1.0 / math.sqrt(sampler.samples_per_pixel)
ray_diff.scale_differentials(coeff)
# evaluate radiance along camera ray
if ray_weight > 0.0:
radiance, intersection, Ts_i = \
self.renderer.Li(self.scene,
ray_diff,
samples[i],
rng,
isects[i])
Ls_i = ray_weight * radiance
else:
Ls_i = Spectrum(0.0)
Ts_i = Spectrum(1.0)
Ls[i] = Ls_i
Ts[i] = Ts_i
# check for unexpected radiance values
if Ls_i.has_nan():
logger.error(
"Not-a-number radiance value returned for image sample. Setting to black.")
Ls_i = Spectrum(0.0)
elif Ls_i.y() < -1e-5:
logger.error(
"Negative luminance value, %f, returned for image sample. Setting to black." % Ls_i.y())
Ls_i = Spectrum(0.0)
elif Ls_i.y() == float('inf'):
logger.error(
"Infinite luminance value returned for image sample. Setting to black.")
Ls_i = Spectrum(0.0)
# report sample results to Sampler, add contributions to image
if sampler.report_results(samples, rays, Ls, isects, sample_count):
for i in range(sample_count):
self.camera.film.add_sample(samples[i], Ls[i])
# clean up after SamplerRendererTask is done with its image region
pass
