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util Directory Reference

## Files

| CpuTimer.h
| A simple timing class (in case openvdb::util::CpuTimer is unavailable)
| CreateNanoGrid.h
| CSampleFromVoxels.h
| DitherLUT.h
| Defines look up table to do dithering of 8^3 leaf nodes.
| ForEach.h
| A unified wrapper for tbb::parallel_for and a naive std::thread fallback.
| GridBuilder.h
| This file defines a minimum set of tree nodes and tools that can be used (instead of OpenVDB) to build nanovdb grids on the CPU.
| GridChecksum.h
| Computes a pair of 32bit checksums, of a Grid, by means of Cyclic Redundancy Check (CRC)
| GridHandle.h
| Defines GridHandle, which manages a host, and possibly a device, memory buffer containing one or more NanoVDB grids.
| GridStats.h
| Re-computes min/max/avg/var/bbox information for each node in a pre-existing NanoVDB grid.
| GridValidator.h
| Checks the validity of an existing NanoVDB grid.
| HDDA.h
| Hierarchical Digital Differential Analyzers specialized for VDB.
| HostBuffer.h
| HostBuffer - a buffer that contains a shared or private bump pool to either externally or internally managed host memory.
| Invoke.h
| A unified wrapper for tbb::parallel_invoke and a naive std::thread analog.
| IO.h
| NanoToOpenVDB.h
| This class will deserialize an NanoVDB grid into an OpenVDB grid.
| NodeManager.h
| This class allows for sequential access to nodes in a NanoVDB tree on both the host and device.
| OpenToNanoVDB.h
| PrefixSum.h
| Multi-threaded implementations of inclusive prefix sum.
| Primitives.h
| Generates volumetric primitives, e.g. sphere, torus etc, as NanoVDB grid.
| Range.h
| Custom Range class that is compatible with the tbb::blocked_range classes.
| Ray.h
| A Ray class.
| Reduce.h
| A unified wrapper for tbb::parallel_reduce and a naive std::future analog.
| SampleFromVoxels.h
| NearestNeighborSampler, TrilinearSampler, TriquadraticSampler and TricubicSampler.
| Stencils.h
| Defines various finite-difference stencils that allow for the computation of gradients of order 1 to 5, mean curvatures, gaussian curvatures, principal curvatures, tri-linear interpolation, zero-crossing, laplacian, and closest point transform.