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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2022 NVIDIA Corporation
* Copyright 2022 Blender Foundation */
#include "hydra/volume.h"
#include "hydra/field.h"
#include "hydra/geometry.inl"
#include "scene/volume.h"
HDCYCLES_NAMESPACE_OPEN_SCOPE
// clang-format off
TF_DEFINE_PRIVATE_TOKENS(_tokens,
(openvdbAsset)
);
// clang-format on
HdCyclesVolume::HdCyclesVolume(const SdfPath &rprimId
#if PXR_VERSION < 2102
,
const SdfPath &instancerId
#endif
)
: HdCyclesGeometry(rprimId
#if PXR_VERSION < 2102
,
instancerId
#endif
)
{
}
HdCyclesVolume::~HdCyclesVolume()
{
}
HdDirtyBits HdCyclesVolume::GetInitialDirtyBitsMask() const
{
HdDirtyBits bits = HdCyclesGeometry::GetInitialDirtyBitsMask();
bits |= HdChangeTracker::DirtyVolumeField;
return bits;
}
void HdCyclesVolume::Populate(HdSceneDelegate *sceneDelegate, HdDirtyBits dirtyBits, bool &rebuild)
{
Scene *const scene = (Scene *)_geom->get_owner();
if (dirtyBits & HdChangeTracker::DirtyVolumeField) {
for (const HdVolumeFieldDescriptor &field :
sceneDelegate->GetVolumeFieldDescriptors(GetId())) {
if (const auto openvdbAsset = static_cast<HdCyclesField *>(
sceneDelegate->GetRenderIndex().GetBprim(_tokens->openvdbAsset, field.fieldId))) {
const ustring name(field.fieldName.GetString());
AttributeStandard std = ATTR_STD_NONE;
if (name == Attribute::standard_name(ATTR_STD_VOLUME_DENSITY)) {
std = ATTR_STD_VOLUME_DENSITY;
}
else if (name == Attribute::standard_name(ATTR_STD_VOLUME_COLOR)) {
std = ATTR_STD_VOLUME_COLOR;
}
else if (name == Attribute::standard_name(ATTR_STD_VOLUME_FLAME)) {
std = ATTR_STD_VOLUME_FLAME;
}
else if (name == Attribute::standard_name(ATTR_STD_VOLUME_HEAT)) {
std = ATTR_STD_VOLUME_HEAT;
}
else if (name == Attribute::standard_name(ATTR_STD_VOLUME_TEMPERATURE)) {
std = ATTR_STD_VOLUME_TEMPERATURE;
}
else if (name == Attribute::standard_name(ATTR_STD_VOLUME_VELOCITY)) {
std = ATTR_STD_VOLUME_VELOCITY;
}
// Skip attributes that are not needed
if ((std != ATTR_STD_NONE && _geom->need_attribute(scene, std)) ||
_geom->need_attribute(scene, name)) {
Attribute *const attr = (std != ATTR_STD_NONE) ?
_geom->attributes.add(std) :
_geom->attributes.add(
name, TypeDesc::TypeFloat, ATTR_ELEMENT_VOXEL);
attr->data_voxel() = openvdbAsset->GetImageHandle();
}
}
}
rebuild = true;
}
}
HDCYCLES_NAMESPACE_CLOSE_SCOPE
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