vtkPolyDataPointSampler Class Reference

generate points from vtkPolyData More...

#include <vtkPolyDataPointSampler.h>

Inheritance diagram for vtkPolyDataPointSampler:

Collaboration diagram for vtkPolyDataPointSampler:

Public Member Functions
virtual void	SetDistance (double)
virtual double	GetDistance ()
virtual int	GetGenerateVertexPoints ()
virtual void	SetGenerateVertexPoints (int)
virtual void	GenerateVertexPointsOn ()
virtual void	GenerateVertexPointsOff ()
virtual int	GetGenerateEdgePoints ()
virtual void	SetGenerateEdgePoints (int)
virtual void	GenerateEdgePointsOn ()
virtual void	GenerateEdgePointsOff ()
virtual int	GetGenerateInteriorPoints ()
virtual void	SetGenerateInteriorPoints (int)
virtual void	GenerateInteriorPointsOn ()
virtual void	GenerateInteriorPointsOff ()
virtual int	GetGenerateVertices ()
virtual void	SetGenerateVertices (int)
virtual void	GenerateVerticesOn ()
virtual void	GenerateVerticesOff ()
Public Member Functions inherited from vtkPolyDataAlgorithm
vtkPolyDataAlgorithm *	NewInstance () const
vtkDataObject *	GetInput ()
vtkDataObject *	GetInput (int port)
vtkPolyData *	GetPolyDataInput (int port)
vtkPolyData *	GetOutput ()
vtkPolyData *	GetOutput (int)
virtual void	SetOutput (vtkDataObject *d)
virtual int	ProcessRequest (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
void	SetInputData (vtkDataObject *)
void	SetInputData (int, vtkDataObject *)
void	AddInputData (vtkDataObject *)
void	AddInputData (int, vtkDataObject *)
Public Member Functions inherited from vtkAlgorithm
vtkAlgorithm *	NewInstance () const
int	HasExecutive ()
vtkExecutive *	GetExecutive ()
virtual void	SetExecutive (vtkExecutive *executive)
virtual int	ModifyRequest (vtkInformation *request, int when)
vtkInformation *	GetInputPortInformation (int port)
vtkInformation *	GetOutputPortInformation (int port)
int	GetNumberOfInputPorts ()
int	GetNumberOfOutputPorts ()
void	UpdateProgress (double amount)
vtkInformation *	GetInputArrayInformation (int idx)
void	RemoveAllInputs ()
vtkDataObject *	GetOutputDataObject (int port)
virtual void	RemoveInputConnection (int port, vtkAlgorithmOutput *input)
virtual void	RemoveInputConnection (int port, int idx)
virtual void	RemoveAllInputConnections (int port)
int	GetNumberOfInputConnections (int port)
int	GetTotalNumberOfInputConnections ()
vtkAlgorithmOutput *	GetInputConnection (int port, int index)
vtkAlgorithm *	GetInputAlgorithm (int port, int index, int &algPort)
vtkAlgorithm *	GetInputAlgorithm (int port, int index)
vtkExecutive *	GetInputExecutive (int port, int index)
vtkInformation *	GetInputInformation (int port, int index)
vtkInformation *	GetOutputInformation (int port)
virtual void	UpdateInformation ()
virtual void	UpdateDataObject ()
virtual void	PropagateUpdateExtent ()
virtual void	UpdateWholeExtent ()
void	ConvertTotalInputToPortConnection (int ind, int &port, int &conn)
int	SetUpdateExtentToWholeExtent (int port)
int	SetUpdateExtentToWholeExtent ()
void	SetUpdateExtent (int port, int extent[6])
int	ProcessRequest (vtkInformation *request, vtkCollection *inInfo, vtkInformationVector *outInfo)
virtual int	ComputePipelineMTime (vtkInformation *request, vtkInformationVector **inInfoVec, vtkInformationVector *outInfoVec, int requestFromOutputPort, unsigned long *mtime)
virtual vtkInformation *	GetInformation ()
virtual void	SetInformation (vtkInformation *)
virtual void	Register (vtkObjectBase *o)
virtual void	UnRegister (vtkObjectBase *o)
virtual void	SetAbortExecute (int)
virtual int	GetAbortExecute ()
virtual void	AbortExecuteOn ()
virtual void	AbortExecuteOff ()
virtual void	SetProgress (double)
virtual double	GetProgress ()
void	SetProgressText (const char *ptext)
virtual char *	GetProgressText ()
virtual unsigned long	GetErrorCode ()
virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, const char *name)
virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, int fieldAttributeType)
virtual void	SetInputArrayToProcess (int idx, vtkInformation *info)
virtual void	SetInputArrayToProcess (int idx, int port, int connection, const char *fieldAssociation, const char *attributeTypeorName)
vtkDataObject *	GetInputDataObject (int port, int connection)
virtual void	SetInputConnection (int port, vtkAlgorithmOutput *input)
virtual void	SetInputConnection (vtkAlgorithmOutput *input)
virtual void	AddInputConnection (int port, vtkAlgorithmOutput *input)
virtual void	AddInputConnection (vtkAlgorithmOutput *input)
virtual void	SetInputDataObject (int port, vtkDataObject *data)
virtual void	SetInputDataObject (vtkDataObject *data)
virtual void	AddInputDataObject (int port, vtkDataObject *data)
virtual void	AddInputDataObject (vtkDataObject *data)
vtkAlgorithmOutput *	GetOutputPort (int index)
vtkAlgorithmOutput *	GetOutputPort ()
vtkAlgorithm *	GetInputAlgorithm ()
vtkExecutive *	GetInputExecutive ()
vtkInformation *	GetInputInformation ()
virtual void	Update (int port)
virtual void	Update ()
virtual void	SetReleaseDataFlag (int)
virtual int	GetReleaseDataFlag ()
void	ReleaseDataFlagOn ()
void	ReleaseDataFlagOff ()
int	UpdateExtentIsEmpty (vtkInformation *pinfo, vtkDataObject *output)
int	UpdateExtentIsEmpty (vtkInformation *pinfo, int extentType)
void	SetUpdateExtent (int port, int piece, int numPieces, int ghostLevel)
void	SetUpdateExtent (int piece, int numPieces, int ghostLevel)
void	SetUpdateExtent (int extent[6])
int *	GetUpdateExtent ()
int *	GetUpdateExtent (int port)
void	GetUpdateExtent (int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
void	GetUpdateExtent (int port, int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
void	GetUpdateExtent (int extent[6])
void	GetUpdateExtent (int port, int extent[6])
int	GetUpdatePiece ()
int	GetUpdatePiece (int port)
int	GetUpdateNumberOfPieces ()
int	GetUpdateNumberOfPieces (int port)
int	GetUpdateGhostLevel ()
int	GetUpdateGhostLevel (int port)
void	SetProgressObserver (vtkProgressObserver *)
virtual vtkProgressObserver *	GetProgressObserver ()
Public Member Functions inherited from vtkObject
vtkObject *	NewInstance () const
virtual void	DebugOn ()
virtual void	DebugOff ()
bool	GetDebug ()
void	SetDebug (bool debugFlag)
virtual void	Modified ()
virtual unsigned long	GetMTime ()
unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
unsigned long	AddObserver (const char *event, vtkCommand *, float priority=0.0f)
vtkCommand *	GetCommand (unsigned long tag)
void	RemoveObserver (vtkCommand *)
void	RemoveObservers (unsigned long event, vtkCommand *)
void	RemoveObservers (const char *event, vtkCommand *)
int	HasObserver (unsigned long event, vtkCommand *)
int	HasObserver (const char *event, vtkCommand *)
void	RemoveObserver (unsigned long tag)
void	RemoveObservers (unsigned long event)
void	RemoveObservers (const char *event)
void	RemoveAllObservers ()
int	HasObserver (unsigned long event)
int	HasObserver (const char *event)
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
int	InvokeEvent (unsigned long event, void *callData)
int	InvokeEvent (const char *event, void *callData)
int	InvokeEvent (unsigned long event)
int	InvokeEvent (const char *event)
Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
virtual void	Delete ()
virtual void	FastDelete ()
void	Print (ostream &os)
void	SetReferenceCount (int)
void	PrintRevisions (ostream &)
virtual void	PrintHeader (ostream &os, vtkIndent indent)
virtual void	PrintTrailer (ostream &os, vtkIndent indent)
int	GetReferenceCount ()

Static Public Member Functions
static vtkPolyDataPointSampler *	New ()
Static Public Member Functions inherited from vtkPolyDataAlgorithm
static vtkPolyDataAlgorithm *	New ()
static int	IsTypeOf (const char *type)
static vtkPolyDataAlgorithm *	SafeDownCast (vtkObjectBase *o)
Static Public Member Functions inherited from vtkAlgorithm
static vtkAlgorithm *	New ()
static int	IsTypeOf (const char *type)
static vtkAlgorithm *	SafeDownCast (vtkObjectBase *o)
static vtkInformationIntegerKey *	INPUT_IS_OPTIONAL ()
static vtkInformationIntegerKey *	INPUT_IS_REPEATABLE ()
static vtkInformationInformationVectorKey *	INPUT_REQUIRED_FIELDS ()
static vtkInformationStringVectorKey *	INPUT_REQUIRED_DATA_TYPE ()
static vtkInformationInformationVectorKey *	INPUT_ARRAYS_TO_PROCESS ()
static vtkInformationIntegerKey *	INPUT_PORT ()
static vtkInformationIntegerKey *	INPUT_CONNECTION ()
static vtkInformationIntegerKey *	CAN_PRODUCE_SUB_EXTENT ()
static vtkInformationIntegerKey *	CAN_HANDLE_PIECE_REQUEST ()
static void	SetDefaultExecutivePrototype (vtkExecutive *proto)
Static Public Member Functions inherited from vtkObject
static int	IsTypeOf (const char *type)
static vtkObject *	SafeDownCast (vtkObjectBase *o)
static vtkObject *	New ()
static void	BreakOnError ()
static void	SetGlobalWarningDisplay (int val)
static void	GlobalWarningDisplayOn ()
static void	GlobalWarningDisplayOff ()
static int	GetGlobalWarningDisplay ()
Static Public Member Functions inherited from vtkObjectBase
static int	IsTypeOf (const char *name)
static vtkObjectBase *	New ()

Protected Member Functions
	vtkPolyDataPointSampler ()
	~vtkPolyDataPointSampler ()
int	RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
void	SampleEdge (vtkPoints *pts, double x0[3], double x1[3])
void	SampleTriangle (vtkPoints *newPts, vtkPoints *inPts, vtkIdType *pts)
void	SamplePolygon (vtkPoints *newPts, vtkPoints *inPts, vtkIdType npts, vtkIdType *pts)
Protected Member Functions inherited from vtkPolyDataAlgorithm
	vtkPolyDataAlgorithm ()
	~vtkPolyDataAlgorithm ()
virtual int	RequestInformation (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
virtual int	FillOutputPortInformation (int port, vtkInformation *info)
virtual int	FillInputPortInformation (int port, vtkInformation *info)
virtual int	RequestUpdateExtent (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
Protected Member Functions inherited from vtkAlgorithm
	vtkAlgorithm ()
	~vtkAlgorithm ()
virtual void	SetNumberOfInputPorts (int n)
virtual void	SetNumberOfOutputPorts (int n)
int	InputPortIndexInRange (int index, const char *action)
int	OutputPortIndexInRange (int index, const char *action)
int	GetInputArrayAssociation (int idx, vtkInformationVector **inputVector)
virtual vtkExecutive *	CreateDefaultExecutive ()
virtual void	ReportReferences (vtkGarbageCollector *)
virtual void	SetNumberOfInputConnections (int port, int n)
int	GetInputArrayAssociation (int idx, int connection, vtkInformationVector **inputVector)
int	GetInputArrayAssociation (int idx, vtkDataObject *input)
vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector)
vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input)
vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input, int &association)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input, int &association)
vtkInformation *	GetInputArrayFieldInformation (int idx, vtkInformationVector **inputVector)
virtual void	SetNthInputConnection (int port, int index, vtkAlgorithmOutput *input)
void	SetInputDataInternal (int port, vtkDataObject *input)
void	AddInputDataInternal (int port, vtkDataObject *input)
virtual void	SetErrorCode (unsigned long)
Protected Member Functions inherited from vtkObject
	vtkObject ()
virtual	~vtkObject ()
virtual void	RegisterInternal (vtkObjectBase *, int check)
virtual void	UnRegisterInternal (vtkObjectBase *, int check)
void	InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=NULL)
void	InternalReleaseFocus ()
Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()
virtual	~vtkObjectBase ()
virtual void	CollectRevisions (ostream &)
	vtkObjectBase (const vtkObjectBase &)
void	operator= (const vtkObjectBase &)

Protected Attributes
double	Distance
double	Distance2
int	GenerateVertexPoints
int	GenerateEdgePoints
int	GenerateInteriorPoints
int	GenerateVertices
Protected Attributes inherited from vtkAlgorithm
vtkInformation *	Information
double	Progress
char *	ProgressText
vtkProgressObserver *	ProgressObserver
unsigned long	ErrorCode
Protected Attributes inherited from vtkObject
bool	Debug
vtkTimeStamp	MTime
vtkSubjectHelper *	SubjectHelper
Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount
vtkWeakPointerBase **	WeakPointers
typedef vtkPolyDataAlgorithm	Superclass
static int	IsTypeOf (const char *type)
static vtkPolyDataPointSampler *	SafeDownCast (vtkObjectBase *o)
virtual int	IsA (const char *type)
vtkPolyDataPointSampler *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)
virtual vtkObjectBase *	NewInstanceInternal () const

Additional Inherited Members
Public Types inherited from vtkPolyDataAlgorithm
typedef vtkAlgorithm	Superclass
Public Types inherited from vtkAlgorithm
typedef vtkObject	Superclass
enum	DesiredOutputPrecision { SINGLE_PRECISION, DOUBLE_PRECISION, DEFAULT_PRECISION }
Public Types inherited from vtkObject
typedef vtkObjectBase	Superclass
Public Attributes inherited from vtkAlgorithm
int	AbortExecute
Static Protected Member Functions inherited from vtkAlgorithm
static vtkInformationIntegerKey *	PORT_REQUIREMENTS_FILLED ()
Static Protected Attributes inherited from vtkAlgorithm
static vtkExecutive *	DefaultExecutivePrototype

Detailed Description

generate points from vtkPolyData

vtkPolyDataPointSampler generates points from input vtkPolyData. The points are placed approximately a specified distance apart.

This filter functions as follows. First, it regurgitates all input points, then samples all lines, plus edges associated with the input polygons and triangle strips to produce edge points. Finally, the interiors of polygons and triangle strips are subsampled to produce points. All of these functiona can be enabled or disabled separately. Note that this algorithm only approximately generates points the specified distance apart. Generally the point density is finer than requested.

Warning

Point generation can be useful in a variety of applications. For example, generating seed points for glyphing or streamline generation. Another useful application is generating points for implicit modeling. In many cases implicit models can be more efficiently generated from points than from polygons or other primitives.

See also

vtkImplicitModeller

Tests:

vtkPolyDataPointSampler (Tests)

Definition at line 49 of file vtkPolyDataPointSampler.h.

Member Typedef Documentation

typedef vtkPolyDataAlgorithm vtkPolyDataPointSampler::Superclass

Standard macros for type information and printing.

Definition at line 57 of file vtkPolyDataPointSampler.h.

Constructor & Destructor Documentation

vtkPolyDataPointSampler::vtkPolyDataPointSampler ( )

protected

vtkPolyDataPointSampler::~vtkPolyDataPointSampler ( )

inlineprotected

Definition at line 105 of file vtkPolyDataPointSampler.h.

Member Function Documentation

static vtkPolyDataPointSampler* vtkPolyDataPointSampler::New ( )

static

Instantiate this class.

static int vtkPolyDataPointSampler::IsTypeOf ( const char *  type )

static

Standard macros for type information and printing.

virtual int vtkPolyDataPointSampler::IsA ( const char *  type )

virtual

Standard macros for type information and printing.

Reimplemented from vtkPolyDataAlgorithm.

static vtkPolyDataPointSampler* vtkPolyDataPointSampler::SafeDownCast ( vtkObjectBase *  o )

static

Standard macros for type information and printing.

virtual vtkObjectBase* vtkPolyDataPointSampler::NewInstanceInternal ( ) const

protectedvirtual

Standard macros for type information and printing.

Reimplemented from vtkPolyDataAlgorithm.

vtkPolyDataPointSampler* vtkPolyDataPointSampler::NewInstance

(

)

const

Standard macros for type information and printing.

void vtkPolyDataPointSampler::PrintSelf ( ostream &  os, vtkIndent  indent  )

virtual

Standard macros for type information and printing.

Reimplemented from vtkPolyDataAlgorithm.

virtual void vtkPolyDataPointSampler::SetDistance ( double  )

virtual

Set/Get the approximate distance between points. This is an absolute distance measure. The default is 0.01.

virtual double vtkPolyDataPointSampler::GetDistance ( )

virtual

Set/Get the approximate distance between points. This is an absolute distance measure. The default is 0.01.

virtual int vtkPolyDataPointSampler::GetGenerateVertexPoints ( )

virtual

Specify/retrieve a boolean flag indicating whether cell vertex points should be output.

virtual void vtkPolyDataPointSampler::SetGenerateVertexPoints ( int  )

virtual

Specify/retrieve a boolean flag indicating whether cell vertex points should be output.

virtual void vtkPolyDataPointSampler::GenerateVertexPointsOn ( )

virtual

Specify/retrieve a boolean flag indicating whether cell vertex points should be output.

virtual void vtkPolyDataPointSampler::GenerateVertexPointsOff ( )

virtual

Specify/retrieve a boolean flag indicating whether cell vertex points should be output.

virtual int vtkPolyDataPointSampler::GetGenerateEdgePoints ( )

virtual

Specify/retrieve a boolean flag indicating whether cell edges should be sampled to produce output points. The default is true.

virtual void vtkPolyDataPointSampler::SetGenerateEdgePoints ( int  )

virtual

Specify/retrieve a boolean flag indicating whether cell edges should be sampled to produce output points. The default is true.

virtual void vtkPolyDataPointSampler::GenerateEdgePointsOn ( )

virtual

Specify/retrieve a boolean flag indicating whether cell edges should be sampled to produce output points. The default is true.

virtual void vtkPolyDataPointSampler::GenerateEdgePointsOff ( )

virtual

Specify/retrieve a boolean flag indicating whether cell edges should be sampled to produce output points. The default is true.

virtual int vtkPolyDataPointSampler::GetGenerateInteriorPoints ( )

virtual

Specify/retrieve a boolean flag indicating whether cell interiors should be sampled to produce output points. The default is true.

virtual void vtkPolyDataPointSampler::SetGenerateInteriorPoints ( int  )

virtual

Specify/retrieve a boolean flag indicating whether cell interiors should be sampled to produce output points. The default is true.

virtual void vtkPolyDataPointSampler::GenerateInteriorPointsOn ( )

virtual

Specify/retrieve a boolean flag indicating whether cell interiors should be sampled to produce output points. The default is true.

virtual void vtkPolyDataPointSampler::GenerateInteriorPointsOff ( )

virtual

Specify/retrieve a boolean flag indicating whether cell interiors should be sampled to produce output points. The default is true.

virtual int vtkPolyDataPointSampler::GetGenerateVertices ( )

virtual

Specify/retrieve a boolean flag indicating whether cell vertices should be generated. Cell vertices are useful if you actually want to display the points (that is, for each point generated, a vertex is generated). Recall that VTK only renders vertices and not points. The default is true.

virtual void vtkPolyDataPointSampler::SetGenerateVertices ( int  )

virtual

Specify/retrieve a boolean flag indicating whether cell vertices should be generated. Cell vertices are useful if you actually want to display the points (that is, for each point generated, a vertex is generated). Recall that VTK only renders vertices and not points. The default is true.

virtual void vtkPolyDataPointSampler::GenerateVerticesOn ( )

virtual

Specify/retrieve a boolean flag indicating whether cell vertices should be generated. Cell vertices are useful if you actually want to display the points (that is, for each point generated, a vertex is generated). Recall that VTK only renders vertices and not points. The default is true.

virtual void vtkPolyDataPointSampler::GenerateVerticesOff ( )

virtual

Specify/retrieve a boolean flag indicating whether cell vertices should be generated. Cell vertices are useful if you actually want to display the points (that is, for each point generated, a vertex is generated). Recall that VTK only renders vertices and not points. The default is true.

int vtkPolyDataPointSampler::RequestData ( vtkInformation *  request, vtkInformationVector **  inputVector, vtkInformationVector *  outputVector  )

protectedvirtual

This is called by the superclass. This is the method you should override.

Reimplemented from vtkPolyDataAlgorithm.

void vtkPolyDataPointSampler::SampleEdge ( vtkPoints *  pts, double  x0[3], double  x1[3]  )

protected

void vtkPolyDataPointSampler::SampleTriangle ( vtkPoints *  newPts, vtkPoints *  inPts, vtkIdType *  pts  )

protected

void vtkPolyDataPointSampler::SamplePolygon ( vtkPoints *  newPts, vtkPoints *  inPts, vtkIdType  npts, vtkIdType *  pts  )

protected

Member Data Documentation

double vtkPolyDataPointSampler::Distance

protected

Definition at line 109 of file vtkPolyDataPointSampler.h.

double vtkPolyDataPointSampler::Distance2

protected

Definition at line 110 of file vtkPolyDataPointSampler.h.

int vtkPolyDataPointSampler::GenerateVertexPoints

protected

Definition at line 112 of file vtkPolyDataPointSampler.h.

int vtkPolyDataPointSampler::GenerateEdgePoints

protected

Definition at line 113 of file vtkPolyDataPointSampler.h.

int vtkPolyDataPointSampler::GenerateInteriorPoints

protected

Definition at line 114 of file vtkPolyDataPointSampler.h.

int vtkPolyDataPointSampler::GenerateVertices

protected

Definition at line 115 of file vtkPolyDataPointSampler.h.

---

The documentation for this class was generated from the following file:

• /home/boeckb/code/depot/group-kitware/vtk/build-release/Utilities/Doxygen/dox/Filters/Modeling/vtkPolyDataPointSampler.h