PointExecutable Class Reference

Object that encapsulates compiled AX code which can be executed on a collection of VDB Point Data grids. Executables are created by the compiler and hold the final immutable JIT compiled function and context. More...

#include <openvdb_ax/compiler/PointExecutable.h>

Public Types
using	Ptr = std::shared_ptr< PointExecutable >

Public Member Functions
	~PointExecutable ()
	PointExecutable (const PointExecutable &other)
	Copy constructor. Shares the LLVM constructs but deep copies the settings. Multiple copies of an executor can be used at the same time safely. More...
void	execute (points::PointDataGrid &grid) const
	Run this point executable binary on a target PointDataGrid. More...
void	setGroupExecution (const std::string &name)
	Set a specific point group to execute over. The default is none, which corresponds to all points. Note that this can also be compiled into the AX function using the ingroup("mygroup") method. More...
const std::string &	getGroupExecution () const
void	setCreateMissing (const bool flag)
	Set the behaviour when missing point attributes are accessed. Default behaviour is true, which creates them with default initial values. If false, a missing attribute runtime error will be thrown on missing accesses. More...
bool	getCreateMissing () const
void	setGrainSize (const size_t grain)
	Set the threading grain size. Default is 1. A value of 0 has the effect of disabling multi-threading. More...
size_t	getGrainSize () const
void	setAttributeBindings (const AttributeBindings &bindings)
	Set attribute bindings. More...
const AttributeBindings &	getAttributeBindings () const

Friends
class	Compiler
class	::TestPointExecutable

Detailed Description

Object that encapsulates compiled AX code which can be executed on a collection of VDB Point Data grids. Executables are created by the compiler and hold the final immutable JIT compiled function and context.

The PointExecutable is returned from the ax::Compiler when compiling AX code for point execution. The class represents a typical AX executable object; immutable except for execution settings and implements 'execute' functions which can be called multiple times for arbitrary sets of inputs. The intended usage of these executables is to configure their runtime arguments and then call PointExecutable::execute with your VDBs. For example:

PointExecutable::Ptr exe = compiler.compile<PointExecutable>("@a += 1");
exe->setCreateMissing(false); // fail on missing attributes
exe->setGroupExecution("group1"); // only process points in group1
exe->execute(vdbs); // run on a set of vdb point data grids
exe->execute(points); // run on a single point data grid

The setCreateMissing is initialised with specific configurable settings:

• Create Missing: True By default, create any missing attributes that were accessed

  See also

  setCreateMissing

• Group Execution: All By default, process all points regardless of their group membership

  See also

  setGroupExecution

• Grain size: 1 The default grain sizes passed to the tbb partitioner for leaf level processing.

  See also

  setGrainSize

  For more in depth information, see the Executables documentation.

Member Typedef Documentation

using Ptr = std::shared_ptr<PointExecutable>

Constructor & Destructor Documentation

~PointExecutable

(

)

PointExecutable

(

const PointExecutable &

other

)

Copy constructor. Shares the LLVM constructs but deep copies the settings. Multiple copies of an executor can be used at the same time safely.

Member Function Documentation

void execute

(

points::PointDataGrid &

grid

)

const

Run this point executable binary on a target PointDataGrid.

This method reads from the stored settings on the executable to determine certain behaviour and runs the JIT compiled function across every valid point. Point attributes may be created, deleted collapsed or expanded, and points themselves may be added, deleted or moved.

This method is thread safe; it can be run concurrently from the same PointExecutable instance on different inputs.

Parameters

grid	The PointDataGrid to process

const AttributeBindings& getAttributeBindings

(

)

const

Returns

The current attribute bindings map

bool getCreateMissing

(

)

const

Returns

Whether this executable will generate new point attributes.

size_t getGrainSize

(

)

const

Returns

The current grain size

const std::string& getGroupExecution

(

)

const

Returns

The points group to be processed. Default is empty, which is all points.

void setAttributeBindings

(

const AttributeBindings &

bindings

)

Set attribute bindings.

Parameters

attributeBindings

A map of attribute bindings to expected names on the geometry to be executed over. By default the AX attributes will be bound to point attributes of the same name. Supplying bindings for a subset of the attributes will leave the others unchanged. AX attributes can only bind to a single point attribute and vice versa. However, in a single set call these can be swapped e.g. a -> b and b -> a. When bindings are overriden through subsequent calls to this function, any dangling point attributes will be automatically bound by name. To reset these bindings call get function and create a target set of bindings for each attribute of name -> name.

void setCreateMissing

(

const bool

flag

)

Set the behaviour when missing point attributes are accessed. Default behaviour is true, which creates them with default initial values. If false, a missing attribute runtime error will be thrown on missing accesses.

Parameters

flag	Enables or disables the creation of missing attributes

void setGrainSize

(

const size_t

grain

)

Set the threading grain size. Default is 1. A value of 0 has the effect of disabling multi-threading.

Parameters

grain

The grain size

void setGroupExecution

(

const std::string &

name

)

Set a specific point group to execute over. The default is none, which corresponds to all points. Note that this can also be compiled into the AX function using the ingroup("mygroup") method.

Warning

If the group does not exist during execute, a runtime error will be thrown.

Parameters

name	The name of the group to execute over

Friends And Related Function Documentation

friend class ::TestPointExecutable

friend

friend class Compiler

friend