util/nanovdb.h

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/* SPDX-FileCopyrightText: Contributors to the OpenVDB Project
 * SPDX-FileCopyrightText: 2025 Blender Foundation
 *
 * SPDX-License-Identifier: Apache-2.0 */
 
#pragma once
 
#ifdef WITH_NANOVDB
 
#  include <openvdb/openvdb.h>
 
#  define NANOVDB_USE_OPENVDB
#  define NANOVDB_USE_TBB
 
#  include <nanovdb/NanoVDB.h>  // manages and streams the raw memory buffer of a NanoVDB grid.
 
#  if NANOVDB_MAJOR_VERSION_NUMBER > 32 || \
      (NANOVDB_MAJOR_VERSION_NUMBER == 32 && NANOVDB_MINOR_VERSION_NUMBER >= 7)
#    include <nanovdb/GridHandle.h>
#  else
#    include <nanovdb/util/GridHandle.h>
#  endif
 
CCL_NAMESPACE_BEGIN
 
/* Convert NanoVDB to OpenVDB mask grid that represents just the topology. */
openvdb::MaskGrid::Ptr nanovdb_to_openvdb_mask(const nanovdb::GridHandle<> &handle);
 
/* Convert OpenVDB to NanoVDB grid. */
nanovdb::GridHandle<> openvdb_to_nanovdb(const openvdb::GridBase::ConstPtr &grid,
                                         const int precision,
                                         const float clipping);
 
CCL_NAMESPACE_END
 
#endif