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ValueAccessor2< _TreeType, IsSafe, L0, L1 > Class Template Reference

Value accessor with two levels of node caching. More...

`#include <openvdb/tree/ValueAccessor.h>`

Inheritance diagram for ValueAccessor2< _TreeType, IsSafe, L0, L1 >:

## Public Types

using | TreeType = _TreeType
using | ValueType = typename TreeType::ValueType
using | RootNodeT = typename TreeType::RootNodeType
using | LeafNodeT = typename TreeType::LeafNodeType
using | BaseT = ValueAccessorBase<TreeType, IsSafe>
using | InvTreeT = typename RootNodeT::NodeChainType
using | NodeT0 = typename InvTreeT::template Get<L0>
using | NodeT1 = typename InvTreeT::template Get<L1>

## Public Member Functions

| ValueAccessor2 (TreeType &tree)
| Constructor from a tree.
| ValueAccessor2 (const ValueAccessor2 &other)
| Copy constructor.
ValueAccessor2 & | operator= (const ValueAccessor2 &other)
| Assignment operator.
| ~ValueAccessor2 () override=default
| Virtual destructor.
bool | isCached (const Coord &xyz) const
const ValueType & | getValue (const Coord &xyz) const
| Return the value of the voxel at the given coordinates.
bool | isValueOn (const Coord &xyz) const
| Return the active state of the voxel at the given coordinates.
bool | probeValue (const Coord &xyz, ValueType &value) const
| Return the active state of the voxel as well as its value.
int | getValueDepth (const Coord &xyz) const
bool | isVoxel (const Coord &xyz) const
void | setValue (const Coord &xyz, const ValueType &value)
| Set the value of the voxel at the given coordinates and mark the voxel as active.
void | setValueOn (const Coord &xyz, const ValueType &value)
void | setValueOnly (const Coord &xyz, const ValueType &value)
| Set the value of the voxel at the given coordinate but preserves its active state.
void | setValueOff (const Coord &xyz, const ValueType &value)
| Set the value of the voxel at the given coordinates and mark the voxel as inactive.
template<typename ModifyOp>
void | modifyValue (const Coord &xyz, const ModifyOp &op)
| Apply a functor to the value of the voxel at the given coordinates and mark the voxel as active.
template<typename ModifyOp>
void | modifyValueAndActiveState (const Coord &xyz, const ModifyOp &op)
| Apply a functor to the voxel at the given coordinates.
void | setActiveState (const Coord &xyz, bool on=true)
| Set the active state of the voxel at the given coordinates without changing its value.
void | setValueOn (const Coord &xyz)
| Mark the voxel at the given coordinates as active without changing its value.
void | setValueOff (const Coord &xyz)
| Mark the voxel at the given coordinates as inactive without changing its value.
template<typename NodeT>
NodeT * | getNode ()
| Return the cached node of type NodeType. [Mainly for internal use].
template<typename NodeT>
void | insertNode (const Coord &xyz, NodeT &node)
template<typename NodeT>
void | eraseNode ()
void | addLeaf (LeafNodeT *leaf)
| Add the specified leaf to this tree, possibly creating a child branch in the process. If the leaf node already exists, replace it.
void | addTile (Index level, const Coord &xyz, const ValueType &value, bool state)
| Add a tile at the specified tree level that contains voxel (x, y, z), possibly deleting existing nodes or creating new nodes in the process.
LeafNodeT * | touchLeaf (const Coord &xyz)
template<typename NodeT>
NodeT * | probeNode (const Coord &xyz)
template<typename NodeT>
const NodeT * | probeConstNode (const Coord &xyz) const
LeafNodeT * | probeLeaf (const Coord &xyz)
const LeafNodeT * | probeLeaf (const Coord &xyz) const
const LeafNodeT * | probeConstLeaf (const Coord &xyz) const
void | clear () override
| Remove all the cached nodes and invalidate the corresponding hash-keys.
_TreeType * | getTree () const
| Return a pointer to the tree associated with this accessor.
_TreeType & | tree () const
| Return a reference to the tree associated with this accessor.

## Static Public Member Functions

static Index | numCacheLevels ()
| Return the number of cache levels employed by this ValueAccessor.
static bool | isSafe ()
| Return true if this accessor is safe, i.e. registered by the tree from which it is constructed. Un-registered accessors can in rare cases be faster because it avoids the (small) overhead of registration, but they are unsafe if the tree is modified. So unless you're an expert it is highly recommended to set IsSafe = true (which is the default).

## Static Public Attributes

static constexpr bool | BypassLeafAPI
static const bool | IsConstTree

## Protected Attributes

_TreeType * | mTree

## Friends

template<typename>
class | RootNode
template<typename, Index>
class | InternalNode
template<typename, Index>
class | LeafNode
template<typename>
class | Tree

## Detailed Description

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
class openvdb::v10_0::tree::ValueAccessor2< _TreeType, IsSafe, L0, L1 >

Value accessor with two levels of node caching.

The node cache levels are specified by L0 and L1 with the default values 0 and 1 (defined in the forward declaration) corresponding to a LeafNode and its parent InternalNode.

Note
  This class is for experts only and should rarely be used directly. Instead use ValueAccessor with its default template arguments.

## Member Typedef Documentation

## BaseT

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

using BaseT = ValueAccessorBase<TreeType, IsSafe>

## InvTreeT

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

using InvTreeT = typename RootNodeT::NodeChainType

## LeafNodeT

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

using LeafNodeT = typename TreeType::LeafNodeType

## NodeT0

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

using NodeT0 = typename InvTreeT::template Get<L0>

## NodeT1

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

using NodeT1 = typename InvTreeT::template Get<L1>

## RootNodeT

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

using RootNodeT = typename TreeType::RootNodeType

## TreeType

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

using TreeType = _TreeType

## ValueType

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

using ValueType = typename TreeType::ValueType

## Constructor & Destructor Documentation

## ValueAccessor2() [1/2]

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

ValueAccessor2 | ( | TreeType & | tree | ) |

inline

Constructor from a tree.

## ValueAccessor2() [2/2]

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

ValueAccessor2 | ( | const ValueAccessor2< _TreeType, IsSafe, L0, L1 > & | other | ) |

inline

Copy constructor.

## ~ValueAccessor2()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

~ValueAccessor2 | ( |  | ) |

override default

Virtual destructor.

## Member Function Documentation

## addLeaf()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void addLeaf | ( | LeafNodeT * | leaf | ) |

inline

Add the specified leaf to this tree, possibly creating a child branch in the process. If the leaf node already exists, replace it.

## addTile()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void addTile | ( | Index | level,
|  | const Coord & | xyz,
|  | const ValueType & | value,
|  | bool | state )

inline

Add a tile at the specified tree level that contains voxel (x, y, z), possibly deleting existing nodes or creating new nodes in the process.

## clear()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void clear | ( |  | ) |

inline override virtual

Remove all the cached nodes and invalidate the corresponding hash-keys.

Implements ValueAccessorBase< _TreeType, IsSafe >.

Reimplemented in ValueAccessor< TreeType, IsSafe, 2, tbb::null_mutex >.

## eraseNode()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename NodeT>

void eraseNode | ( |  | ) |

inline

If a node of the given type exists in the cache, remove it, so that isCached(xyz) returns `false` for any voxel (x, y, z) contained in that node. [Mainly for internal use]

## getNode()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename NodeT>

NodeT * getNode | ( |  | ) |

inline

Return the cached node of type NodeType. [Mainly for internal use].

## getTree()

_TreeType * getTree | ( |  | ) | const

inline inherited

Return a pointer to the tree associated with this accessor.

The pointer will be null only if the tree from which this accessor was constructed was subsequently deleted (which generally leaves the accessor in an unsafe state).

## getValue()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

const ValueType & getValue | ( | const Coord & | xyz | ) | const

inline

Return the value of the voxel at the given coordinates.

## getValueDepth()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

int getValueDepth | ( | const Coord & | xyz | ) | const

inline

Return the tree depth (0 = root) at which the value of voxel (x, y, z) resides, or -1 if (x, y, z) isn't explicitly represented in the tree (i.e., if it is implicitly a background voxel).

## insertNode()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename NodeT>

void insertNode | ( | const Coord & | xyz,
|  | NodeT & | node )

inline

Cache the given node, which should lie along the path from the root node to the node containing voxel (x, y, z). [Mainly for internal use]

## isCached()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

bool isCached | ( | const Coord & | xyz | ) | const

inline

Return `true` if any of the nodes along the path to the given voxel have been cached.

## isSafe()

bool isSafe | ( |  | ) |

inline static inherited

Return true if this accessor is safe, i.e. registered by the tree from which it is constructed. Un-registered accessors can in rare cases be faster because it avoids the (small) overhead of registration, but they are unsafe if the tree is modified. So unless you're an expert it is highly recommended to set IsSafe = true (which is the default).

## isValueOn()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

bool isValueOn | ( | const Coord & | xyz | ) | const

inline

Return the active state of the voxel at the given coordinates.

## isVoxel()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

bool isVoxel | ( | const Coord & | xyz | ) | const

inline

Return `true` if the value of voxel (x, y, z) resides at the leaf level of the tree, i.e., if it is not a tile value.

## modifyValue()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename ModifyOp>

void modifyValue | ( | const Coord & | xyz,
|  | const ModifyOp & | op )

inline

Apply a functor to the value of the voxel at the given coordinates and mark the voxel as active.

See Tree::modifyValue() for details.

## modifyValueAndActiveState()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename ModifyOp>

void modifyValueAndActiveState | ( | const Coord & | xyz,
|  | const ModifyOp & | op )

inline

Apply a functor to the voxel at the given coordinates.

See Tree::modifyValueAndActiveState() for details.

## numCacheLevels()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

Index numCacheLevels | ( |  | ) |

inline static

Return the number of cache levels employed by this ValueAccessor.

## operator=()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

ValueAccessor2 & operator= | ( | const ValueAccessor2< _TreeType, IsSafe, L0, L1 > & | other | ) |

inline

Assignment operator.

## probeConstLeaf()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

const LeafNodeT * probeConstLeaf | ( | const Coord & | xyz | ) | const

inline

Returns
  a const pointer to the leaf node that contains voxel (x, y, z) and if it doesn't exist, return `nullptr`.

## probeConstNode()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename NodeT>

const NodeT * probeConstNode | ( | const Coord & | xyz | ) | const

inline

Returns
  a const pointer to the node of the specified type that contains voxel (x, y, z) and if it doesn't exist, return `nullptr`.

## probeLeaf() [1/2]

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

LeafNodeT * probeLeaf | ( | const Coord & | xyz | ) |

inline

Returns
  a pointer to the leaf node that contains voxel (x, y, z) and if it doesn't exist, return `nullptr`.

## probeLeaf() [2/2]

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

const LeafNodeT * probeLeaf | ( | const Coord & | xyz | ) | const

inline

## probeNode()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename NodeT>

NodeT * probeNode | ( | const Coord & | xyz | ) |

inline

Returns
  a pointer to the node of the specified type that contains voxel (x, y, z) and if it doesn't exist, return `nullptr`.

## probeValue()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

bool probeValue | ( | const Coord & | xyz,
|  | ValueType & | value ) const

inline

Return the active state of the voxel as well as its value.

## setActiveState()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void setActiveState | ( | const Coord & | xyz,
|  | bool | on = true )

inline

Set the active state of the voxel at the given coordinates without changing its value.

## setValue()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void setValue | ( | const Coord & | xyz,
|  | const ValueType & | value )

inline

Set the value of the voxel at the given coordinates and mark the voxel as active.

## setValueOff() [1/2]

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void setValueOff | ( | const Coord & | xyz | ) |

inline

Mark the voxel at the given coordinates as inactive without changing its value.

## setValueOff() [2/2]

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void setValueOff | ( | const Coord & | xyz,
|  | const ValueType & | value )

inline

Set the value of the voxel at the given coordinates and mark the voxel as inactive.

## setValueOn() [1/2]

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void setValueOn | ( | const Coord & | xyz | ) |

inline

Mark the voxel at the given coordinates as active without changing its value.

## setValueOn() [2/2]

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void setValueOn | ( | const Coord & | xyz,
|  | const ValueType & | value )

inline

## setValueOnly()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

void setValueOnly | ( | const Coord & | xyz,
|  | const ValueType & | value )

inline

Set the value of the voxel at the given coordinate but preserves its active state.

## touchLeaf()

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

LeafNodeT * touchLeaf | ( | const Coord & | xyz | ) |

inline

Returns
  the leaf node that contains voxel (x, y, z) and if it doesn't exist, create it, but preserve the values and active states of all voxels.

Use this method to preallocate a static tree topology over which to safely perform multithreaded processing.

## tree()

_TreeType & tree | ( |  | ) | const

inline inherited

Return a reference to the tree associated with this accessor.

## Friends And Related Symbol Documentation

## InternalNode

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename, Index>

friend class InternalNode

friend

## LeafNode

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename, Index>

friend class LeafNode

friend

## RootNode

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename>

friend class RootNode

friend

## Tree

template<typename _TreeType, bool IsSafe, Index L0, Index L1>
template<typename>

friend class Tree

friend

## Member Data Documentation

## BypassLeafAPI

template<typename _TreeType, bool IsSafe, Index L0, Index L1>

bool BypassLeafAPI

static constexpr

Initial value:
=
std::is_same<NodeT0, LeafNodeT>::value &&
std::is_same<typename LeafNodeT::Buffer::StorageType, ValueType>::value

## IsConstTree

const bool IsConstTree

static inherited

## mTree

_TreeType* mTree

protected inherited