use a control polyhedron to deform an input vtkPointSet More...

#include <vtkDeformPointSet.h>

Inheritance diagram for vtkDeformPointSet:

Collaboration diagram for vtkDeformPointSet:

Public Member Functions
void	SetControlMeshConnection (vtkAlgorithmOutput *algOutput)

void	SetControlMeshData (vtkPolyData *controlMesh)
vtkPolyData *	GetControlMeshData ()

virtual void	SetInitializeWeights (int)
virtual int	GetInitializeWeights ()
virtual void	InitializeWeightsOn ()
virtual void	InitializeWeightsOff ()
Protected Member Functions
	vtkDeformPointSet ()
	~vtkDeformPointSet ()
virtual int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector )
Protected Attributes
int	InitializeWeights
vtkIdType	InitialNumberOfControlMeshPoints
vtkIdType	InitialNumberOfControlMeshCells
vtkIdType	InitialNumberOfPointSetPoints
vtkIdType	InitialNumberOfPointSetCells
vtkSmartPointer< vtkDoubleArray >	Weights
typedef vtkPointSetAlgorithm	Superclass
static vtkDeformPointSet *	New ()
static int	IsTypeOf (const char *type)
static vtkDeformPointSet *	SafeDownCast (vtkObjectBase *o)
virtual int	IsA (const char *type)
vtkDeformPointSet *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)
virtual vtkObjectBase *	NewInstanceInternal () const

Detailed Description

use a control polyhedron to deform an input vtkPointSet

vtkDeformPointSet is a filter that uses a control polyhdron to deform an input dataset of type vtkPointSet. The control polyhedron (or mesh) must be a closed, manifold surface.

The filter executes as follows. In initial pipeline execution, the control mesh and input vtkPointSet are assumed in undeformed position, and an initial set of interpolation weights are computed for each point in the vtkPointSet (one interpolation weight value for each point in the control mesh). The filter then stores these interpolation weights after filter execution. The next time the filter executes, assuming that the number of points/cells in the control mesh and vtkPointSet have not changed, the points in the vtkPointSet are recomputed based on the original weights. Hence if the control mesh has been deformed, it will in turn cause deformation in the vtkPointSet. This can be used to animate or edit the geometry of the vtkPointSet.

Warning:: Note that a set of interpolation weights per point in the vtkPointSet is maintained. The number of interpolation weights is the number of points in the control mesh. Hence keep the control mesh small in size or a n^2 data explostion will occur.; The filter maintains interpolation weights between executions (after the initial execution pass computes the interpolation weights). You can explicitly cause the filter to reinitialize by setting the InitializeWeights boolean to true. By default, the filter will execute and then set InitializeWeights to false.; This work was motivated by the work of Tao Ju et al in "Mesh Value Coordinates for Closed Triangular Meshes." The MVC algorithm is currently used to generate interpolation weights. However, in the future this filter may be extended to provide other interpolation functions.; A final note: point data and cell data are passed from the input to the output. Only the point coordinates of the input vtkPointSet are modified.

See also:: vtkMeanValueCoordinatesInterpolator vtkProbePolyhedron vtkPolyhedron

Tests:: vtkDeformPointSet (Tests)

Definition at line 76 of file vtkDeformPointSet.h.

Member Typedef Documentation

typedef vtkPointSetAlgorithm vtkDeformPointSet::Superclass

Standard methods for instantiable (i.e., concrete) class.

Reimplemented from vtkPointSetAlgorithm.

Definition at line 82 of file vtkDeformPointSet.h.

Constructor & Destructor Documentation

vtkDeformPointSet::vtkDeformPointSet ( ) [protected]

vtkDeformPointSet::~vtkDeformPointSet ( ) [protected]

Member Function Documentation

static vtkDeformPointSet* vtkDeformPointSet::New ( ) [static]

Standard methods for instantiable (i.e., concrete) class.

Reimplemented from vtkPointSetAlgorithm.

static int vtkDeformPointSet::IsTypeOf ( const char * type ) [static]

Standard methods for instantiable (i.e., concrete) class.

Reimplemented from vtkPointSetAlgorithm.

virtual int vtkDeformPointSet::IsA ( const char * type ) [virtual]

Standard methods for instantiable (i.e., concrete) class.

Reimplemented from vtkPointSetAlgorithm.

static vtkDeformPointSet* vtkDeformPointSet::SafeDownCast ( vtkObjectBase * o ) [static]

Standard methods for instantiable (i.e., concrete) class.

Reimplemented from vtkPointSetAlgorithm.

virtual vtkObjectBase* vtkDeformPointSet::NewInstanceInternal ( ) const [protected, virtual]

Standard methods for instantiable (i.e., concrete) class.

Reimplemented from vtkPointSetAlgorithm.

vtkDeformPointSet* vtkDeformPointSet::NewInstance ( ) const

Standard methods for instantiable (i.e., concrete) class.

Reimplemented from vtkPointSetAlgorithm.

void vtkDeformPointSet::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)		`[virtual]`

Standard methods for instantiable (i.e., concrete) class.

Reimplemented from vtkPointSetAlgorithm.

void vtkDeformPointSet::SetControlMeshData ( vtkPolyData * controlMesh )

Specify the control mesh to deform the input vtkPointSet. The control mesh must be a closed, non-self-intersecting, manifold mesh.

vtkPolyData* vtkDeformPointSet::GetControlMeshData ( )

Specify the control mesh to deform the input vtkPointSet. The control mesh must be a closed, non-self-intersecting, manifold mesh.

void vtkDeformPointSet::SetControlMeshConnection ( vtkAlgorithmOutput * algOutput )

Specify the point locations used to probe input. Any geometry can be used. New style. Equivalent to SetInputConnection(1, algOutput).

virtual void vtkDeformPointSet::SetInitializeWeights ( int ) [virtual]

Specify whether to regenerate interpolation weights or not. Initially the filter will reexecute no matter what this flag is set to (initial weights must be computed). Also, this flag is ignored if the number of input points/cells or the number of control mesh points/cells changes between executions. Thus flag is used to force reexecution and recomputation of weights.

virtual int vtkDeformPointSet::GetInitializeWeights ( ) [virtual]

Specify whether to regenerate interpolation weights or not. Initially the filter will reexecute no matter what this flag is set to (initial weights must be computed). Also, this flag is ignored if the number of input points/cells or the number of control mesh points/cells changes between executions. Thus flag is used to force reexecution and recomputation of weights.

virtual void vtkDeformPointSet::InitializeWeightsOn ( ) [virtual]

Specify whether to regenerate interpolation weights or not. Initially the filter will reexecute no matter what this flag is set to (initial weights must be computed). Also, this flag is ignored if the number of input points/cells or the number of control mesh points/cells changes between executions. Thus flag is used to force reexecution and recomputation of weights.

virtual void vtkDeformPointSet::InitializeWeightsOff ( ) [virtual]

Specify whether to regenerate interpolation weights or not. Initially the filter will reexecute no matter what this flag is set to (initial weights must be computed). Also, this flag is ignored if the number of input points/cells or the number of control mesh points/cells changes between executions. Thus flag is used to force reexecution and recomputation of weights.