diff options
Diffstat (limited to 'intern/cycles/hydra/light.cpp')
| -rw-r--r-- | intern/cycles/hydra/light.cpp | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/intern/cycles/hydra/light.cpp b/intern/cycles/hydra/light.cpp new file mode 100644 index 00000000000..b691da0d6a6 --- /dev/null +++ b/intern/cycles/hydra/light.cpp @@ -0,0 +1,399 @@ +/* SPDX-License-Identifier: Apache-2.0 + * Copyright 2022 NVIDIA Corporation + * Copyright 2022 Blender Foundation */ + +#include "hydra/light.h" +#include "hydra/session.h" +#include "scene/light.h" +#include "scene/scene.h" +#include "scene/shader.h" +#include "scene/shader_graph.h" +#include "scene/shader_nodes.h" +#include "util/hash.h" + +#include <pxr/imaging/hd/sceneDelegate.h> +#include <pxr/usd/sdf/assetPath.h> + +HDCYCLES_NAMESPACE_OPEN_SCOPE + +extern Transform convert_transform(const GfMatrix4d &matrix); + +// clang-format off +TF_DEFINE_PRIVATE_TOKENS(_tokens, + (visibleInPrimaryRay) +); +// clang-format on + +HdCyclesLight::HdCyclesLight(const SdfPath &sprimId, const TfToken &lightType) + : HdLight(sprimId), _lightType(lightType) +{ +} + +HdCyclesLight::~HdCyclesLight() +{ +} + +HdDirtyBits HdCyclesLight::GetInitialDirtyBitsMask() const +{ + return DirtyBits::DirtyTransform | DirtyBits::DirtyParams; +} + +void HdCyclesLight::Sync(HdSceneDelegate *sceneDelegate, + HdRenderParam *renderParam, + HdDirtyBits *dirtyBits) +{ + if (*dirtyBits == DirtyBits::Clean) { + return; + } + + Initialize(renderParam); + + const SceneLock lock(renderParam); + + VtValue value; + const SdfPath &id = GetId(); + + if (*dirtyBits & DirtyBits::DirtyTransform) { +#if PXR_VERSION >= 2011 + const Transform tfm = convert_transform(sceneDelegate->GetTransform(id)); +#else + const Transform tfm = convert_transform( + sceneDelegate->GetLightParamValue(id, HdTokens->transform).Get<GfMatrix4d>()); +#endif + _light->set_tfm(tfm); + + _light->set_co(transform_get_column(&tfm, 3)); + _light->set_dir(-transform_get_column(&tfm, 2)); + + if (_lightType == HdPrimTypeTokens->diskLight || _lightType == HdPrimTypeTokens->rectLight) { + _light->set_axisu(transform_get_column(&tfm, 0)); + _light->set_axisv(transform_get_column(&tfm, 1)); + } + } + + if (*dirtyBits & DirtyBits::DirtyParams) { + float3 strength = make_float3(1.0f, 1.0f, 1.0f); + + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->color); + if (!value.IsEmpty()) { + const auto color = value.Get<GfVec3f>(); + strength = make_float3(color[0], color[1], color[2]); + } + + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->exposure); + if (!value.IsEmpty()) { + strength *= exp2(value.Get<float>()); + } + + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->intensity); + if (!value.IsEmpty()) { + strength *= value.Get<float>(); + } + + // Cycles lights are normalized by default, so need to scale intensity if Hydra light is not + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->normalize); + const bool normalize = value.IsHolding<bool>() && value.UncheckedGet<bool>(); + + value = sceneDelegate->GetLightParamValue(id, _tokens->visibleInPrimaryRay); + if (!value.IsEmpty()) { + _light->set_use_camera(value.Get<bool>()); + } + + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->shadowEnable); + if (!value.IsEmpty()) { + _light->set_cast_shadow(value.Get<bool>()); + } + + if (_lightType == HdPrimTypeTokens->distantLight) { + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->angle); + if (!value.IsEmpty()) { + _light->set_angle(GfDegreesToRadians(value.Get<float>())); + } + } + else if (_lightType == HdPrimTypeTokens->diskLight) { + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->radius); + if (!value.IsEmpty()) { + const float size = value.Get<float>() * 2.0f; + _light->set_sizeu(size); + _light->set_sizev(size); + } + + if (!normalize) { + const float radius = _light->get_sizeu() * 0.5f; + strength *= M_PI * radius * radius; + } + } + else if (_lightType == HdPrimTypeTokens->rectLight) { + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->width); + if (!value.IsEmpty()) { + _light->set_sizeu(value.Get<float>()); + } + + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->height); + if (!value.IsEmpty()) { + _light->set_sizev(value.Get<float>()); + } + + if (!normalize) { + strength *= _light->get_sizeu() * _light->get_sizeu(); + } + } + else if (_lightType == HdPrimTypeTokens->sphereLight) { + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->radius); + if (!value.IsEmpty()) { + _light->set_size(value.Get<float>()); + } + + bool shaping = false; + + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->shapingConeAngle); + if (!value.IsEmpty()) { + _light->set_spot_angle(GfDegreesToRadians(value.Get<float>()) * 2.0f); + shaping = true; + } + + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->shapingConeSoftness); + if (!value.IsEmpty()) { + _light->set_spot_smooth(value.Get<float>()); + shaping = true; + } + + _light->set_light_type(shaping ? LIGHT_SPOT : LIGHT_POINT); + + if (!normalize) { + const float radius = _light->get_size(); + strength *= M_PI * radius * radius * 4.0f; + } + } + + const bool visible = sceneDelegate->GetVisible(id); + // Disable invisible lights by zeroing the strength + // So 'LightManager::test_enabled_lights' updates the enabled flag correctly + if (!visible) { + strength = zero_float3(); + } + + _light->set_strength(strength); + _light->set_is_enabled(visible); + + PopulateShaderGraph(sceneDelegate); + } + // Need to update shader graph when transform changes in case transform was baked into it + else if (_light->tfm_is_modified() && (_lightType == HdPrimTypeTokens->domeLight || + _light->get_shader()->has_surface_spatial_varying)) { + PopulateShaderGraph(sceneDelegate); + } + + if (_light->is_modified()) { + _light->tag_update(lock.scene); + } + + *dirtyBits = DirtyBits::Clean; +} + +void HdCyclesLight::PopulateShaderGraph(HdSceneDelegate *sceneDelegate) +{ + auto graph = new ShaderGraph(); + ShaderNode *outputNode = nullptr; + + if (_lightType == HdPrimTypeTokens->domeLight) { + BackgroundNode *bgNode = graph->create_node<BackgroundNode>(); + // Bake strength into shader graph, since only the shader is used for background lights + bgNode->set_color(_light->get_strength()); + graph->add(bgNode); + + graph->connect(bgNode->output("Background"), graph->output()->input("Surface")); + + outputNode = bgNode; + } + else { + EmissionNode *emissionNode = graph->create_node<EmissionNode>(); + emissionNode->set_color(one_float3()); + emissionNode->set_strength(1.0f); + graph->add(emissionNode); + + graph->connect(emissionNode->output("Emission"), graph->output()->input("Surface")); + + outputNode = emissionNode; + } + + VtValue value; + const SdfPath &id = GetId(); + bool hasSpatialVarying = false; + bool hasColorTemperature = false; + + if (sceneDelegate != nullptr) { + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->enableColorTemperature); + const bool enableColorTemperature = value.IsHolding<bool>() && value.UncheckedGet<bool>(); + + if (enableColorTemperature) { + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->colorTemperature); + if (value.IsHolding<float>()) { + BlackbodyNode *blackbodyNode = graph->create_node<BlackbodyNode>(); + blackbodyNode->set_temperature(value.UncheckedGet<float>()); + graph->add(blackbodyNode); + + if (_lightType == HdPrimTypeTokens->domeLight) { + VectorMathNode *mathNode = graph->create_node<VectorMathNode>(); + mathNode->set_math_type(NODE_VECTOR_MATH_MULTIPLY); + mathNode->set_vector2(_light->get_strength()); + graph->add(mathNode); + + graph->connect(blackbodyNode->output("Color"), mathNode->input("Vector1")); + graph->connect(mathNode->output("Vector"), outputNode->input("Color")); + } + else { + graph->connect(blackbodyNode->output("Color"), outputNode->input("Color")); + } + + hasColorTemperature = true; + } + } + + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->shapingIesFile); + if (value.IsHolding<SdfAssetPath>()) { + std::string filename = value.UncheckedGet<SdfAssetPath>().GetResolvedPath(); + if (filename.empty()) { + filename = value.UncheckedGet<SdfAssetPath>().GetAssetPath(); + } + + TextureCoordinateNode *coordNode = graph->create_node<TextureCoordinateNode>(); + coordNode->set_ob_tfm(_light->get_tfm()); + coordNode->set_use_transform(true); + graph->add(coordNode); + + IESLightNode *iesNode = graph->create_node<IESLightNode>(); + iesNode->set_filename(ustring(filename)); + + graph->connect(coordNode->output("Normal"), iesNode->input("Vector")); + graph->connect(iesNode->output("Fac"), outputNode->input("Strength")); + + hasSpatialVarying = true; + } + + value = sceneDelegate->GetLightParamValue(id, HdLightTokens->textureFile); + if (value.IsHolding<SdfAssetPath>()) { + std::string filename = value.UncheckedGet<SdfAssetPath>().GetResolvedPath(); + if (filename.empty()) { + filename = value.UncheckedGet<SdfAssetPath>().GetAssetPath(); + } + + ImageSlotTextureNode *textureNode = nullptr; + if (_lightType == HdPrimTypeTokens->domeLight) { + Transform tfm = _light->get_tfm(); + transform_set_column(&tfm, 3, zero_float3()); // Remove translation + + TextureCoordinateNode *coordNode = graph->create_node<TextureCoordinateNode>(); + coordNode->set_ob_tfm(tfm); + coordNode->set_use_transform(true); + graph->add(coordNode); + + textureNode = graph->create_node<EnvironmentTextureNode>(); + static_cast<EnvironmentTextureNode *>(textureNode)->set_filename(ustring(filename)); + graph->add(textureNode); + + graph->connect(coordNode->output("Object"), textureNode->input("Vector")); + + hasSpatialVarying = true; + } + else { + GeometryNode *coordNode = graph->create_node<GeometryNode>(); + graph->add(coordNode); + + textureNode = graph->create_node<ImageTextureNode>(); + static_cast<ImageTextureNode *>(textureNode)->set_filename(ustring(filename)); + graph->add(textureNode); + + graph->connect(coordNode->output("Parametric"), textureNode->input("Vector")); + } + + if (hasColorTemperature) { + VectorMathNode *mathNode = graph->create_node<VectorMathNode>(); + mathNode->set_math_type(NODE_VECTOR_MATH_MULTIPLY); + graph->add(mathNode); + + graph->connect(textureNode->output("Color"), mathNode->input("Vector1")); + ShaderInput *const outputNodeInput = outputNode->input("Color"); + graph->connect(outputNodeInput->link, mathNode->input("Vector2")); + graph->disconnect(outputNodeInput); + graph->connect(mathNode->output("Vector"), outputNodeInput); + } + else if (_lightType == HdPrimTypeTokens->domeLight) { + VectorMathNode *mathNode = graph->create_node<VectorMathNode>(); + mathNode->set_math_type(NODE_VECTOR_MATH_MULTIPLY); + mathNode->set_vector2(_light->get_strength()); + graph->add(mathNode); + + graph->connect(textureNode->output("Color"), mathNode->input("Vector1")); + graph->connect(mathNode->output("Vector"), outputNode->input("Color")); + } + else { + graph->connect(textureNode->output("Color"), outputNode->input("Color")); + } + } + } + + Shader *const shader = _light->get_shader(); + shader->set_graph(graph); + shader->tag_update((Scene *)_light->get_owner()); + + shader->has_surface_spatial_varying = hasSpatialVarying; +} + +void HdCyclesLight::Finalize(HdRenderParam *renderParam) +{ + if (!_light) { + return; + } + + const SceneLock lock(renderParam); + + lock.scene->delete_node(_light); + _light = nullptr; +} + +void HdCyclesLight::Initialize(HdRenderParam *renderParam) +{ + if (_light) { + return; + } + + const SceneLock lock(renderParam); + + _light = lock.scene->create_node<Light>(); + _light->name = GetId().GetString(); + + _light->set_random_id(hash_uint2(hash_string(_light->name.c_str()), 0)); + + if (_lightType == HdPrimTypeTokens->domeLight) { + _light->set_light_type(LIGHT_BACKGROUND); + } + else if (_lightType == HdPrimTypeTokens->distantLight) { + _light->set_light_type(LIGHT_DISTANT); + } + else if (_lightType == HdPrimTypeTokens->diskLight) { + _light->set_light_type(LIGHT_AREA); + _light->set_round(true); + _light->set_size(1.0f); + } + else if (_lightType == HdPrimTypeTokens->rectLight) { + _light->set_light_type(LIGHT_AREA); + _light->set_round(false); + _light->set_size(1.0f); + } + else if (_lightType == HdPrimTypeTokens->sphereLight) { + _light->set_light_type(LIGHT_POINT); + _light->set_size(1.0f); + } + + _light->set_use_mis(true); + _light->set_use_camera(false); + + Shader *const shader = lock.scene->create_node<Shader>(); + _light->set_shader(shader); + + // Create default shader graph + PopulateShaderGraph(nullptr); +} + +HDCYCLES_NAMESPACE_CLOSE_SCOPE |