OpenVDB 12.1.1

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MorphologyHelpers.h
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1// Copyright Contributors to the OpenVDB Project
2// SPDX-License-Identifier: Apache-2.0
3
4/*!
5 \file MorphologyHelpers.h
6
7 \author Efty Sifakis
8
9 \date March 17, 2025
10
11 \brief This file implements helper methods used in morphology operations
12
13*/
14
15#ifndef NANOVDB_TOOLS_CUDA_MORPHOLOGYHELPERS_H_HAS_BEEN_INCLUDED
16#define NANOVDB_TOOLS_CUDA_MORPHOLOGYHELPERS_H_HAS_BEEN_INCLUDED
17
18#include <nanovdb/NanoVDB.h>
19
20 namespace nanovdb::tools {
21
22 namespace morphology {
23
24 enum NearestNeighbors { NN_FACE = 6, NN_FACE_EDGE = 18, NN_FACE_EDGE_VERTEX = 26 };
25
26 template<int di, int dj, int dk>
27 struct NearestNeighborBitMask {
28 static_assert( (di>=-1) && (di<=1) && (dj>=-1) && (dj<=1) && (dk>=-1) && (dk<=1) );
29 static constexpr uint32_t value = 1u << (di+1)*9+(dj+1)*3+dk+1;
30};
31
32 template<NearestNeighbors nnType>
33__hostdev__
34uint32_t neighborMaskStencil(const nanovdb::Mask<3>& mask)
35{
36 uint32_t result = 0;
37 auto words = mask.words();
38 uint64_t allWordsOr = 0;
39 for (int i = 0; i < 8; i++)
40 allWordsOr |= words[i];
41 // Center
42 if ( allWordsOr ) result |= NearestNeighborBitMask< 0, 0, 0>::value;
43 // Neighbors across faces
44 if constexpr (nnType == NN_FACE || nnType == NN_FACE_EDGE || nnType == NN_FACE_EDGE_VERTEX) {
45 if ( words[0] ) result |= NearestNeighborBitMask<-1, 0, 0>::value;
46 if ( words[7] ) result |= NearestNeighborBitMask< 1, 0, 0>::value;
47 if ( allWordsOr & 0x00000000000000ffUL ) result |= NearestNeighborBitMask< 0,-1, 0>::value;
48 if ( allWordsOr & 0xff00000000000000UL ) result |= NearestNeighborBitMask< 0, 1, 0>::value;
49 if ( allWordsOr & 0x0101010101010101UL ) result |= NearestNeighborBitMask< 0, 0,-1>::value;
50 if ( allWordsOr & 0x8080808080808080UL ) result |= NearestNeighborBitMask< 0, 0, 1>::value; }
51 // Neighbors across edges
52 if constexpr (nnType == NN_FACE_EDGE || nnType == NN_FACE_EDGE_VERTEX) {
53 if ( words[0] & 0x00000000000000ffUL ) result |= NearestNeighborBitMask<-1,-1, 0>::value;
54 if ( words[0] & 0xff00000000000000UL ) result |= NearestNeighborBitMask<-1, 1, 0>::value;
55 if ( words[0] & 0x0101010101010101UL ) result |= NearestNeighborBitMask<-1, 0,-1>::value;
56 if ( words[0] & 0x8080808080808080UL ) result |= NearestNeighborBitMask<-1, 0, 1>::value;
57 if ( allWordsOr & 0x0000000000000001UL ) result |= NearestNeighborBitMask< 0,-1,-1>::value;
58 if ( allWordsOr & 0x0000000000000080UL ) result |= NearestNeighborBitMask< 0,-1, 1>::value;
59 if ( allWordsOr & 0x0100000000000000UL ) result |= NearestNeighborBitMask< 0, 1,-1>::value;
60 if ( allWordsOr & 0x8000000000000000UL ) result |= NearestNeighborBitMask< 0, 1, 1>::value;
61 if ( words[7] & 0x00000000000000ffUL ) result |= NearestNeighborBitMask< 1,-1, 0>::value;
62 if ( words[7] & 0xff00000000000000UL ) result |= NearestNeighborBitMask< 1, 1, 0>::value;
63 if ( words[7] & 0x0101010101010101UL ) result |= NearestNeighborBitMask< 1, 0,-1>::value;
64 if ( words[7] & 0x8080808080808080UL ) result |= NearestNeighborBitMask< 1, 0, 1>::value; }
65 // Neighbors across vertices
66 if constexpr (nnType == NN_FACE_EDGE_VERTEX) {
67 if ( words[0] & 0x0000000000000001UL ) result |= NearestNeighborBitMask<-1,-1,-1>::value;
68 if ( words[0] & 0x0000000000000080UL ) result |= NearestNeighborBitMask<-1,-1, 1>::value;
69 if ( words[0] & 0x0100000000000000UL ) result |= NearestNeighborBitMask<-1, 1,-1>::value;
70 if ( words[0] & 0x8000000000000000UL ) result |= NearestNeighborBitMask<-1, 1, 1>::value;
71 if ( words[7] & 0x0000000000000001UL ) result |= NearestNeighborBitMask< 1,-1,-1>::value;
72 if ( words[7] & 0x0000000000000080UL ) result |= NearestNeighborBitMask< 1,-1, 1>::value;
73 if ( words[7] & 0x0100000000000000UL ) result |= NearestNeighborBitMask< 1, 1,-1>::value;
74 if ( words[7] & 0x8000000000000000UL ) result |= NearestNeighborBitMask< 1, 1, 1>::value; }
75 return result;
76}
77
78} // namespace morphology
79
80} // namespace nanovdb::tools
81
82#if defined(__CUDACC__)
83#include <nanovdb/util/cuda/MorphologyHelpers.cuh>
84#endif // defined(__CUDACC__)
85
86#endif // NANOVDB_TOOLS_CUDA_MORPHOLOGYHELPERS_H_HAS_BEEN_INCLUDED
87
NanoVDB.h
Implements a light-weight self-contained VDB data-structure in a single file! In other words,...
nanovdb::Mask
Bit-mask to encode active states and facilitate sequential iterators and a fast codec for I/O compres...
Definition NanoVDB.h:1028
nanovdb::Mask::words
__hostdev__ uint64_t * words()
Return a pointer to the list of words of the bit mask.
Definition NanoVDB.h:1152
nanovdb::tools::morphology
Definition MorphologyHelpers.h:22
nanovdb::tools::morphology::NearestNeighbors
NearestNeighbors
Definition MorphologyHelpers.h:24
nanovdb::tools::morphology::NN_FACE_EDGE_VERTEX
@ NN_FACE_EDGE_VERTEX
Definition MorphologyHelpers.h:24
nanovdb::tools::morphology::NN_FACE_EDGE
@ NN_FACE_EDGE
Definition MorphologyHelpers.h:24
nanovdb::tools::morphology::NN_FACE
@ NN_FACE
Definition MorphologyHelpers.h:24
nanovdb::tools::morphology::neighborMaskStencil
__hostdev__ uint32_t neighborMaskStencil(const nanovdb::Mask< 3 > &mask)
Definition MorphologyHelpers.h:34
nanovdb::tools
Definition MorphologyHelpers.h:20
__hostdev__
#define __hostdev__
Definition Util.h:73
nanovdb::tools::morphology::NearestNeighborBitMask
Definition MorphologyHelpers.h:27
nanovdb::tools::morphology::NearestNeighborBitMask::value
static constexpr uint32_t value
Definition MorphologyHelpers.h:29