75a6d3abf7
This adds path guiding features into Cycles by integrating Intel's Open Path Guiding Library. It can be enabled in the Sampling > Path Guiding panel in the render properties. This feature helps reduce noise in scenes where finding a path to light is difficult for regular path tracing. The current implementation supports guiding directional sampling decisions on surfaces, when the material contains a least one diffuse component, and in volumes with isotropic and anisotropic Henyey-Greenstein phase functions. On surfaces, the guided sampling decision is proportional to the product of the incident radiance and the normal-oriented cosine lobe and in volumes it is proportional to the product of the incident radiance and the phase function. The incident radiance field of a scene is learned and updated during rendering after each per-frame rendering iteration/progression. At the moment, path guiding is only supported by the CPU backend. Support for GPU backends will be added in future versions of OpenPGL. Ref T92571 Differential Revision: https://developer.blender.org/D15286
58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2011-2022 Blender Foundation */
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#include "device/cpu/device.h"
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#include "device/cpu/device_impl.h"
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/* Used for `info.denoisers`. */
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/* TODO(sergey): The denoisers are probably to be moved completely out of the device into their
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* own class. But until then keep API consistent with how it used to work before. */
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#include "util/guiding.h"
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#include "util/openimagedenoise.h"
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CCL_NAMESPACE_BEGIN
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Device *device_cpu_create(const DeviceInfo &info, Stats &stats, Profiler &profiler)
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{
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return new CPUDevice(info, stats, profiler);
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}
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void device_cpu_info(vector<DeviceInfo> &devices)
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{
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DeviceInfo info;
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info.type = DEVICE_CPU;
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info.description = system_cpu_brand_string();
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info.id = "CPU";
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info.num = 0;
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info.has_osl = true;
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info.has_nanovdb = true;
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info.has_profiling = true;
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if (guiding_supported()) {
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info.has_guiding = true;
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}
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else {
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info.has_guiding = false;
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}
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if (openimagedenoise_supported()) {
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info.denoisers |= DENOISER_OPENIMAGEDENOISE;
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}
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devices.insert(devices.begin(), info);
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}
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string device_cpu_capabilities()
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{
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string capabilities = "";
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capabilities += system_cpu_support_sse2() ? "SSE2 " : "";
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capabilities += system_cpu_support_sse3() ? "SSE3 " : "";
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capabilities += system_cpu_support_sse41() ? "SSE41 " : "";
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capabilities += system_cpu_support_avx() ? "AVX " : "";
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capabilities += system_cpu_support_avx2() ? "AVX2" : "";
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if (capabilities[capabilities.size() - 1] == ' ')
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capabilities.resize(capabilities.size() - 1);
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return capabilities;
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}
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CCL_NAMESPACE_END
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