d377ef2543
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203 lines
5.9 KiB
C++
203 lines
5.9 KiB
C++
/* SPDX-FileCopyrightText: 2022 NVIDIA Corporation
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* SPDX-FileCopyrightText: 2022 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#include "hydra/pointcloud.h"
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#include "hydra/geometry.inl"
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#include "scene/pointcloud.h"
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#include <pxr/imaging/hd/extComputationUtils.h>
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HDCYCLES_NAMESPACE_OPEN_SCOPE
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HdCyclesPoints::HdCyclesPoints(const SdfPath &rprimId
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#if PXR_VERSION < 2102
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,
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const SdfPath &instancerId
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#endif
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)
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: HdCyclesGeometry(rprimId
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#if PXR_VERSION < 2102
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,
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instancerId
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#endif
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)
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{
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}
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HdCyclesPoints::~HdCyclesPoints() {}
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HdDirtyBits HdCyclesPoints::GetInitialDirtyBitsMask() const
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{
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HdDirtyBits bits = HdCyclesGeometry::GetInitialDirtyBitsMask();
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bits |= HdChangeTracker::DirtyPoints | HdChangeTracker::DirtyWidths |
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HdChangeTracker::DirtyPrimvar;
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return bits;
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}
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HdDirtyBits HdCyclesPoints::_PropagateDirtyBits(HdDirtyBits bits) const
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{
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// Points and widths always have to be updated together
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if (bits & (HdChangeTracker::DirtyPoints | HdChangeTracker::DirtyWidths)) {
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bits |= HdChangeTracker::DirtyPoints | HdChangeTracker::DirtyWidths;
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}
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return bits;
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}
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void HdCyclesPoints::Populate(HdSceneDelegate *sceneDelegate, HdDirtyBits dirtyBits, bool &rebuild)
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{
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if (dirtyBits & (HdChangeTracker::DirtyPoints | HdChangeTracker::DirtyWidths)) {
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const size_t numPoints = _geom->num_points();
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PopulatePoints(sceneDelegate);
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PopulateWidths(sceneDelegate);
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rebuild = _geom->num_points() != numPoints;
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array<int> shaders;
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shaders.reserve(_geom->num_points());
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for (size_t i = 0; i < _geom->num_points(); ++i) {
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shaders.push_back_reserved(0);
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}
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_geom->set_shader(shaders);
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}
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if (dirtyBits & HdChangeTracker::DirtyPrimvar) {
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PopulatePrimvars(sceneDelegate);
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}
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}
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void HdCyclesPoints::PopulatePoints(HdSceneDelegate *sceneDelegate)
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{
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VtValue value;
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for (const HdExtComputationPrimvarDescriptor &desc :
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sceneDelegate->GetExtComputationPrimvarDescriptors(GetId(), HdInterpolationVertex))
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{
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if (desc.name == HdTokens->points) {
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auto valueStore = HdExtComputationUtils::GetComputedPrimvarValues({desc}, sceneDelegate);
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const auto valueStoreIt = valueStore.find(desc.name);
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if (valueStoreIt != valueStore.end()) {
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value = std::move(valueStoreIt->second);
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}
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break;
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}
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}
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if (value.IsEmpty()) {
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value = GetPrimvar(sceneDelegate, HdTokens->points);
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}
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if (!value.IsHolding<VtVec3fArray>()) {
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TF_WARN("Invalid points data for %s", GetId().GetText());
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return;
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}
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const auto &points = value.UncheckedGet<VtVec3fArray>();
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array<float3> pointsDataCycles;
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pointsDataCycles.reserve(points.size());
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for (const GfVec3f &point : points) {
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pointsDataCycles.push_back_reserved(make_float3(point[0], point[1], point[2]));
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}
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_geom->set_points(pointsDataCycles);
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}
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void HdCyclesPoints::PopulateWidths(HdSceneDelegate *sceneDelegate)
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{
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VtValue value = GetPrimvar(sceneDelegate, HdTokens->widths);
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const HdInterpolation interpolation = GetPrimvarInterpolation(sceneDelegate, HdTokens->widths);
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if (!value.IsHolding<VtFloatArray>()) {
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TF_WARN("Invalid widths data for %s", GetId().GetText());
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return;
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}
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const auto &widths = value.UncheckedGet<VtFloatArray>();
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array<float> radiusDataCycles;
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radiusDataCycles.reserve(_geom->num_points());
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if (interpolation == HdInterpolationConstant) {
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TF_VERIFY(widths.size() == 1);
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const float constantRadius = widths[0] * 0.5f;
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for (size_t i = 0; i < _geom->num_points(); ++i) {
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radiusDataCycles.push_back_reserved(constantRadius);
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}
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}
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else if (interpolation == HdInterpolationVertex) {
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TF_VERIFY(widths.size() == _geom->num_points());
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for (size_t i = 0; i < _geom->num_points(); ++i) {
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radiusDataCycles.push_back_reserved(widths[i] * 0.5f);
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}
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}
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_geom->set_radius(radiusDataCycles);
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}
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void HdCyclesPoints::PopulatePrimvars(HdSceneDelegate *sceneDelegate)
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{
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Scene *const scene = (Scene *)_geom->get_owner();
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const std::pair<HdInterpolation, AttributeElement> interpolations[] = {
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std::make_pair(HdInterpolationVertex, ATTR_ELEMENT_VERTEX),
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std::make_pair(HdInterpolationConstant, ATTR_ELEMENT_OBJECT),
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};
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for (const auto &interpolation : interpolations) {
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for (const HdPrimvarDescriptor &desc :
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GetPrimvarDescriptors(sceneDelegate, interpolation.first))
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{
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// Skip special primvars that are handled separately
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if (desc.name == HdTokens->points || desc.name == HdTokens->widths) {
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continue;
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}
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VtValue value = GetPrimvar(sceneDelegate, desc.name);
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if (value.IsEmpty()) {
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continue;
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}
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const ustring name(desc.name.GetString());
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AttributeStandard std = ATTR_STD_NONE;
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if (desc.role == HdPrimvarRoleTokens->textureCoordinate) {
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std = ATTR_STD_UV;
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}
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else if (interpolation.first == HdInterpolationVertex) {
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if (desc.name == HdTokens->displayColor || desc.role == HdPrimvarRoleTokens->color) {
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std = ATTR_STD_VERTEX_COLOR;
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}
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else if (desc.name == HdTokens->normals) {
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std = ATTR_STD_VERTEX_NORMAL;
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}
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}
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else if (desc.name == HdTokens->displayColor &&
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interpolation.first == HdInterpolationConstant)
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{
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if (value.IsHolding<VtVec3fArray>() && value.GetArraySize() == 1) {
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const GfVec3f color = value.UncheckedGet<VtVec3fArray>()[0];
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_instances[0]->set_color(make_float3(color[0], color[1], color[2]));
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}
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}
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// Skip attributes that are not needed
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if ((std != ATTR_STD_NONE && _geom->need_attribute(scene, std)) ||
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_geom->need_attribute(scene, name))
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{
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ApplyPrimvars(_geom->attributes, name, value, interpolation.second, std);
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}
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}
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}
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}
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HDCYCLES_NAMESPACE_CLOSE_SCOPE
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