usd_reader_instance.cc

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/* SPDX-FileCopyrightText: 2023 NVIDIA Corporation. All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include "usd_reader_instance.hh"
 
#include "BKE_lib_id.hh"
#include "BKE_object.hh"
 
#include "DNA_collection_types.h"
#include "DNA_object_types.h"
 
namespace blender::io::usd {
 
USDInstanceReader::USDInstanceReader(const pxr::UsdPrim &prim,
                                     const USDImportParams &import_params,
                                     const ImportSettings &settings)
    : USDXformReader(prim, import_params, settings)
{
}
 
bool USDInstanceReader::valid() const
{
  return prim_.IsValid() && prim_.IsInstance();
}
 
void USDInstanceReader::create_object(Main *bmain, const double /*motionSampleTime*/)
{
  this->object_ = BKE_object_add_only_object(bmain, OB_EMPTY, name_.c_str());
  this->object_->data = nullptr;
  this->object_->instance_collection = nullptr;
  this->object_->transflag |= OB_DUPLICOLLECTION;
}
 
void USDInstanceReader::set_instance_collection(Collection *coll)
{
  if (this->object_ && this->object_->instance_collection != coll) {
    if (this->object_->instance_collection) {
      id_us_min(&this->object_->instance_collection->id);
      this->object_->instance_collection = nullptr;
    }
    id_us_plus(&coll->id);
    this->object_->instance_collection = coll;
  }
}
 
pxr::SdfPath USDInstanceReader::proto_path() const
{
  if (pxr::UsdPrim proto = prim_.GetPrototype()) {
    return proto.GetPath();
  }
 
  return pxr::SdfPath();
}
 
}  // namespace blender::io::usd