OpenVDB: openvdb_ax/codegen/PointLeafLocalData.h Source File

OpenVDB 10.0.1

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PointLeafLocalData.h
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1// Copyright Contributors to the OpenVDB Project
2// SPDX-License-Identifier: MPL-2.0
3
4/// @file codegen/PointLeafLocalData.h
5///
6/// @authors Nick Avramoussis
7///
8/// @brief Thread/Leaf local data used during execution over OpenVDB Points
9///
10
11#ifndef OPENVDB_AX_COMPILER_LEAF_LOCAL_DATA_HAS_BEEN_INCLUDED
12#define OPENVDB_AX_COMPILER_LEAF_LOCAL_DATA_HAS_BEEN_INCLUDED
13
14#include <openvdb/openvdb.h>
15#include <openvdb/version.h>
16#include <openvdb/points/AttributeArray.h>
17#include <openvdb/points/PointAttribute.h>
18#include <openvdb/points/PointDataGrid.h>
19#include <openvdb/points/PointGroup.h>
20
21namespace openvdb {
22 OPENVDB_USE_VERSION_NAMESPACE
23namespace OPENVDB_VERSION_NAME {
24
25namespace ax {
26namespace codegen {
27
28namespace codegen_internal {
29
30
31/// @brief Various functions can request the use and initialization of point data from within
32/// the kernel that does not use the standard attribute handle methods. This data can
33/// then be accessed after execution to perform post-processes such as adding new groups,
34/// adding new string attributes or updating positions.
35///
36/// @note Due to the way string handles work, string write attribute handles cannot
37/// be constructed in parallel, nor can read handles retrieve values in parallel
38/// if there is a chance the shared metadata is being written to (with set()).
39/// As the compiler allows for any arbitrary string setting/getting, leaf local
40/// maps are used for temporary storage per point. The maps use the string array
41/// pointers as a key for later synchronization.
42///
43 struct PointLeafLocalData
44{
45 using UniquePtr = std::unique_ptr<PointLeafLocalData>;
46 using GroupArrayT = openvdb::points::GroupAttributeArray;
47 using GroupHandleT = openvdb::points::GroupWriteHandle;
48
49 using PointStringMap = std::map<uint64_t, std::string>;
50 using StringArrayMap = std::map<points::AttributeArray*, PointStringMap>;
51
52 using LeafNode = openvdb::points::PointDataTree::LeafNodeType;
53
54 /// @brief Construct a new data object to keep track of various data objects
55 /// created per leaf by the point compute generator.
56 ///
57 /// @param count The number of points within the current leaf, used to initialize
58 /// the size of new arrays
59 ///
60 PointLeafLocalData(const size_t count)
61 : mPointCount(count)
62 , mArrays()
63 , mOffset(0)
64 , mHandles()
65 , mStringMap() {}
66
67 ////////////////////////////////////////////////////////////////////////
68
69 /// Group methods
70
71 /// @brief Return a group write handle to a specific group name, creating the
72 /// group array if it doesn't exist. This includes either registering a
73 /// new offset or allocating an entire array. The returned handle is
74 /// guaranteed to be valid.
75 ///
76 /// @param name The group name
77 ///
78 inline GroupHandleT* getOrInsert(const std::string& name)
79 {
80 GroupHandleT* ptr = get(name);
81 if (ptr) return ptr;
82
83 static const size_t maxGroupsInArray =
84#if (OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER > 7 || \
85 (OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER >= 7 && \
86 OPENVDB_LIBRARY_MINOR_VERSION_NUMBER >= 1))
87 points::AttributeSet::Descriptor::groupBits();
88#else
89 // old removed method
90 points::point_group_internal::GroupInfo::groupBits();
91#endif
92
93 if (mArrays.empty() || mOffset == maxGroupsInArray) {
94 assert(mPointCount < static_cast<size_t>(std::numeric_limits<openvdb::Index>::max()));
95 mArrays.emplace_back(new GroupArrayT(static_cast<openvdb::Index>(mPointCount)));
96 mOffset = 0;
97 }
98
99 GroupArrayT* array = mArrays.back().get();
100 assert(array);
101
102 std::unique_ptr<GroupHandleT>& handle = mHandles[name];
103 handle.reset(new GroupHandleT(*array, mOffset++));
104 return handle.get();
105 }
106
107 /// @brief Return a group write handle to a specific group name if it exists.
108 /// Returns a nullptr if no group exists of the given name
109 ///
110 /// @param name The group name
111 ///
112 inline GroupHandleT* get(const std::string& name) const
113 {
114 const auto iter = mHandles.find(name);
115 if (iter == mHandles.end()) return nullptr;
116 return iter->second.get();
117 }
118
119 /// @brief Return true if a valid group handle exists
120 ///
121 /// @param name The group name
122 ///
123 inline bool hasGroup(const std::string& name) const {
124 return mHandles.find(name) != mHandles.end();
125 }
126
127 /// @brief Populate a set with all the groups which have been inserted into
128 /// this object. Used to compute a final set of all new groups which
129 /// have been created across all leaf nodes
130 ///
131 /// @param groups The set to populate
132 ///
133 inline void getGroups(std::set<std::string>& groups) const {
134 for (const auto& iter : mHandles) {
135 groups.insert(iter.first);
136 }
137 }
138
139 /// @brief Compact all arrays stored on this object. This does not invalidate
140 /// any active write handles.
141 ///
142 inline void compact() {
143 for (auto& array : mArrays) array->compact();
144 }
145
146
147 ////////////////////////////////////////////////////////////////////////
148
149 /// String methods
150
151 /// @brief Get any new string data associated with a particular point on a
152 /// particular string attribute array. Returns true if data was set,
153 /// false if no data was found.
154 ///
155 /// @param array The array pointer to use as a key lookup
156 /// @param idx The point index
157 /// @param data The string to set if data is stored
158 ///
159 inline bool
160 getNewStringData(const points::AttributeArray* array, const uint64_t idx, std::string& data) const {
161 const auto arrayMapIter = mStringMap.find(const_cast<points::AttributeArray*>(array));
162 if (arrayMapIter == mStringMap.end()) return false;
163 const auto iter = arrayMapIter->second.find(idx);
164 if (iter == arrayMapIter->second.end()) return false;
165 data = iter->second;
166 return true;
167 }
168
169 /// @brief Set new string data associated with a particular point on a
170 /// particular string attribute array.
171 ///
172 /// @param array The array pointer to use as a key lookup
173 /// @param idx The point index
174 /// @param data The string to set
175 ///
176 inline void
177 setNewStringData(points::AttributeArray* array, const uint64_t idx, const std::string& data) {
178 mStringMap[array][idx] = data;
179 }
180
181 /// @brief Remove any new string data associated with a particular point on a
182 /// particular string attribute array. Does nothing if no data exists
183 ///
184 /// @param array The array pointer to use as a key lookup
185 /// @param idx The point index
186 ///
187 inline void
188 removeNewStringData(points::AttributeArray* array, const uint64_t idx) {
189 const auto arrayMapIter = mStringMap.find(array);
190 if (arrayMapIter == mStringMap.end()) return;
191 arrayMapIter->second.erase(idx);
192 if (arrayMapIter->second.empty()) mStringMap.erase(arrayMapIter);
193 }
194
195 /// @brief Insert all new point strings stored across all collected string
196 /// attribute arrays into a StringMetaInserter. Returns false if the
197 /// inserter was not accessed and true if it was potentially modified.
198 ///
199 /// @param inserter The string meta inserter to update
200 ///
201 inline bool
202 insertNewStrings(points::StringMetaInserter& inserter) const {
203 for (const auto& arrayIter : mStringMap) {
204 for (const auto& iter : arrayIter.second) {
205 inserter.insert(iter.second);
206 }
207 }
208 return !mStringMap.empty();
209 }
210
211 /// @brief Returns a const reference to the string array map
212 ///
213 inline const StringArrayMap& getStringArrayMap() const {
214 return mStringMap;
215 }
216
217private:
218
219 const size_t mPointCount;
220 std::vector<std::unique_ptr<GroupArrayT>> mArrays;
221 points::GroupType mOffset;
222 std::map<std::string, std::unique_ptr<GroupHandleT>> mHandles;
223 StringArrayMap mStringMap;
224};
225
226} // codegen_internal
227
228} // namespace compiler
229} // namespace ax
230} // namespace OPENVDB_VERSION_NAME
231} // namespace openvdb
232
233#endif // OPENVDB_AX_COMPILER_LEAF_LOCAL_DATA_HAS_BEEN_INCLUDED
234
AttributeArray.h
Attribute Array storage templated on type and compression codec.
PointAttribute.h
Point attribute manipulation in a VDB Point Grid.
PointDataGrid.h
Attribute-owned data structure for points. Point attributes are stored in leaf nodes and ordered by v...
PointGroup.h
Point group manipulation in a VDB Point Grid.
openvdb::v10_0::points::AttributeArray
Base class for storing attribute data.
Definition AttributeArray.h:93
openvdb::v10_0::points::StringMetaInserter
Class to help with insertion of keyed string values into metadata.
Definition AttributeArrayString.h:89
openvdb::v10_0::points::StringMetaInserter::insert
Index insert(const Name &name, Index hint=Index(0))
Insert the string into the metadata using the hint if non-zero.
openvdb::v10_0::points::GroupType
uint8_t GroupType
Definition AttributeSet.h:31
openvdb::v10_0::Index
Index32 Index
Definition Types.h:54
openvdb
Definition Exceptions.h:13
openvdb.h
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData
Various functions can request the use and initialization of point data from within the kernel that do...
Definition PointLeafLocalData.h:44
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::compact
void compact()
Compact all arrays stored on this object. This does not invalidate any active write handles.
Definition PointLeafLocalData.h:142
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::PointStringMap
std::map< uint64_t, std::string > PointStringMap
Definition PointLeafLocalData.h:49
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::GroupHandleT
openvdb::points::GroupWriteHandle GroupHandleT
Definition PointLeafLocalData.h:47
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::PointLeafLocalData
PointLeafLocalData(const size_t count)
Construct a new data object to keep track of various data objects created per leaf by the point compu...
Definition PointLeafLocalData.h:60
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::UniquePtr
std::unique_ptr< PointLeafLocalData > UniquePtr
Definition PointLeafLocalData.h:45
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::hasGroup
bool hasGroup(const std::string &name) const
Return true if a valid group handle exists.
Definition PointLeafLocalData.h:123
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::LeafNode
openvdb::points::PointDataTree::LeafNodeType LeafNode
Definition PointLeafLocalData.h:52
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::get
GroupHandleT * get(const std::string &name) const
Return a group write handle to a specific group name if it exists. Returns a nullptr if no group exis...
Definition PointLeafLocalData.h:112
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::getOrInsert
GroupHandleT * getOrInsert(const std::string &name)
Group methods.
Definition PointLeafLocalData.h:78
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::GroupArrayT
openvdb::points::GroupAttributeArray GroupArrayT
Definition PointLeafLocalData.h:46
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::getGroups
void getGroups(std::set< std::string > &groups) const
Populate a set with all the groups which have been inserted into this object. Used to compute a final...
Definition PointLeafLocalData.h:133
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::getNewStringData
bool getNewStringData(const points::AttributeArray *array, const uint64_t idx, std::string &data) const
String methods.
Definition PointLeafLocalData.h:160
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::getStringArrayMap
const StringArrayMap & getStringArrayMap() const
Returns a const reference to the string array map.
Definition PointLeafLocalData.h:213
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::StringArrayMap
std::map< points::AttributeArray *, PointStringMap > StringArrayMap
Definition PointLeafLocalData.h:50
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::insertNewStrings
bool insertNewStrings(points::StringMetaInserter &inserter) const
Insert all new point strings stored across all collected string attribute arrays into a StringMetaIns...
Definition PointLeafLocalData.h:202
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::removeNewStringData
void removeNewStringData(points::AttributeArray *array, const uint64_t idx)
Remove any new string data associated with a particular point on a particular string attribute array....
Definition PointLeafLocalData.h:188
openvdb::v10_0::ax::codegen::codegen_internal::PointLeafLocalData::setNewStringData
void setNewStringData(points::AttributeArray *array, const uint64_t idx, const std::string &data)
Set new string data associated with a particular point on a particular string attribute array.
Definition PointLeafLocalData.h:177
OPENVDB_VERSION_NAME
#define OPENVDB_VERSION_NAME
The version namespace name for this library version.
Definition version.h.in:121
OPENVDB_USE_VERSION_NAMESPACE
#define OPENVDB_USE_VERSION_NAMESPACE
Definition version.h.in:212