LevelSetAdvection< GridT, FieldT, InterruptT > Class Template Reference

Hyperbolic advection of narrow-band level sets in an external velocity field. More...

#include <openvdb/tools/LevelSetAdvect.h>

Public Types
using	GridType = GridT
using	TrackerT = LevelSetTracker< GridT, InterruptT >
using	LeafRange = typename TrackerT::LeafRange
using	LeafType = typename TrackerT::LeafType
using	BufferType = typename TrackerT::BufferType
using	ValueType = typename TrackerT::ValueType
using	VectorType = typename FieldT::VectorType

Public Member Functions
	LevelSetAdvection (GridT &grid, const FieldT &field, InterruptT *interrupt=nullptr)
	Main constructor. More...
virtual	~LevelSetAdvection ()
math::BiasedGradientScheme	getSpatialScheme () const
	Return the spatial finite difference scheme. More...
void	setSpatialScheme (math::BiasedGradientScheme scheme)
	Set the spatial finite difference scheme. More...
math::TemporalIntegrationScheme	getTemporalScheme () const
	Return the temporal integration scheme. More...
void	setTemporalScheme (math::TemporalIntegrationScheme scheme)
	Set the spatial finite difference scheme. More...
math::BiasedGradientScheme	getTrackerSpatialScheme () const
	Return the spatial finite difference scheme. More...
void	setTrackerSpatialScheme (math::BiasedGradientScheme scheme)
	Set the spatial finite difference scheme. More...
math::TemporalIntegrationScheme	getTrackerTemporalScheme () const
	Return the temporal integration scheme. More...
void	setTrackerTemporalScheme (math::TemporalIntegrationScheme scheme)
	Set the spatial finite difference scheme. More...
int	getNormCount () const
	Return The number of normalizations performed per track or normalize call. More...
void	setNormCount (int n)
	Set the number of normalizations performed per track or normalize call. More...
int	getGrainSize () const
	Return the grain-size used for multi-threading. More...
void	setGrainSize (int grainsize)
	Set the grain-size used for multi-threading. More...
size_t	advect (ValueType time0, ValueType time1)

Detailed Description

template<typename GridT, typename FieldT = EnrightField<typename GridT::ValueType>, typename InterruptT = util::NullInterrupter>
class openvdb::v9_0::tools::LevelSetAdvection< GridT, FieldT, InterruptT >

Hyperbolic advection of narrow-band level sets in an external velocity field.

The FieldType template argument below refers to any functor with the following interface (see tools/VelocityFields.h for examples):

class VelocityField {
  ...
public:
  openvdb::VectorType operator() (const openvdb::Coord& xyz, ValueType time) const;
  ...
};

Note

The functor method returns the velocity field at coordinate position xyz of the advection grid, and for the specified time. Note that since the velocity is returned in the local coordinate space of the grid that is being advected, the functor typically depends on the transformation of that grid. This design is chosen for performance reasons. Finally we will assume that the functor method is NOT threadsafe (typically uses a ValueAccessor) and that its lightweight enough that we can copy it per thread.

The InterruptType template argument below refers to any class with the following interface:

 class Interrupter {
   ...
 public:
   void start(const char* name = nullptr) // called when computations begin
   void end()                             // called when computations end
   bool wasInterrupted(int percent=-1)    // return true to break computation
};

Note

If no template argument is provided for this InterruptType the util::NullInterrupter is used which implies that all interrupter calls are no-ops (i.e. incurs no computational overhead).

Member Typedef Documentation

using BufferType = typename TrackerT::BufferType

using GridType = GridT

using LeafRange = typename TrackerT::LeafRange

using LeafType = typename TrackerT::LeafType

using TrackerT = LevelSetTracker<GridT, InterruptT>

using ValueType = typename TrackerT::ValueType

using VectorType = typename FieldT::VectorType

Constructor & Destructor Documentation

LevelSetAdvection ( GridT &  grid, const FieldT &  field, InterruptT *  interrupt = nullptr  )

inline

Main constructor.

virtual ~LevelSetAdvection ( )

inlinevirtual

Member Function Documentation

size_t advect	(	ValueType	time0,
		ValueType	time1
	)

Advect the level set from its current time, time0, to its final time, time1. If time0>time1 backward advection is performed.

Returns

number of CFL iterations used to advect from time0 to time1

int getGrainSize ( ) const

inline

Return the grain-size used for multi-threading.

int getNormCount ( ) const

inline

Return The number of normalizations performed per track or normalize call.

math::BiasedGradientScheme getSpatialScheme ( ) const

inline

Return the spatial finite difference scheme.

math::TemporalIntegrationScheme getTemporalScheme ( ) const

inline

Return the temporal integration scheme.

math::BiasedGradientScheme getTrackerSpatialScheme ( ) const

inline

Return the spatial finite difference scheme.

math::TemporalIntegrationScheme getTrackerTemporalScheme ( ) const

inline

Return the temporal integration scheme.

void setGrainSize ( int  grainsize )

inline

Set the grain-size used for multi-threading.

Note

A grain size of 0 or less disables multi-threading!

void setNormCount ( int  n )

inline

Set the number of normalizations performed per track or normalize call.

void setSpatialScheme ( math::BiasedGradientScheme  scheme )

inline

Set the spatial finite difference scheme.

void setTemporalScheme ( math::TemporalIntegrationScheme  scheme )

inline

Set the spatial finite difference scheme.

void setTrackerSpatialScheme ( math::BiasedGradientScheme  scheme )

inline

Set the spatial finite difference scheme.

void setTrackerTemporalScheme ( math::TemporalIntegrationScheme  scheme )

inline

Set the spatial finite difference scheme.