vtkLoopSubdivisionFilter Class Reference

#include <vtkLoopSubdivisionFilter.h>

Inheritance diagram for vtkLoopSubdivisionFilter:

[legend]Collaboration diagram for vtkLoopSubdivisionFilter:

[legend]List of all members.

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Detailed Description

generate a subdivision surface using the Loop Scheme

vtkLoopSubdivisionFilter is an approximating subdivision scheme that creates four new triangles for each triangle in the mesh. The user can specify the NumberOfSubdivisions. Loop's subdivision scheme is described in: Loop, C., "Smooth Subdivision surfaces based on triangles,", Masters Thesis, University of Utah, August 1987. For a nice summary of the technique see, Hoppe, H., et. al, "Piecewise Smooth Surface Reconstruction,:, Proceedings of Siggraph 94 (Orlando, Florida, July 24-29, 1994). In COmputer Graphics Proceedings, Annual COnference Series, 1994, ACM SIGGRAPH, pp. 295-302.

The filter only operates on triangles. Users should use the vtkTriangleFilter to triangulate meshes that contain polygons or triangle strips.

The filter approximates point data using the same scheme. New triangles create at a subdivision step will have the cell data of their parent cell.

Thanks:

This work was supported by PHS Research Grant No. 1 P41 RR13218-01 from the National Center for Research Resources.

See also:

vtkApproximatingSubdivisionFilter

Tests:

vtkLoopSubdivisionFilter (Tests)

Definition at line 58 of file vtkLoopSubdivisionFilter.h.

typedef vtkApproximatingSubdivisionFilter	Superclass
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
static vtkLoopSubdivisionFilter *	New ()
static int	IsTypeOf (const char *type)
static vtkLoopSubdivisionFilter *	SafeDownCast (vtkObject *o)
Protected Member Functions
	vtkLoopSubdivisionFilter ()
	~vtkLoopSubdivisionFilter ()
virtual int	RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
void	GenerateSubdivisionPoints (vtkPolyData *inputDS, vtkIntArray *edgeData, vtkPoints *outputPts, vtkPointData *outputPD)
void	GenerateEvenStencil (vtkIdType p1, vtkPolyData *polys, vtkIdList *stencilIds, double *weights)
void	GenerateOddStencil (vtkIdType p1, vtkIdType p2, vtkPolyData *polys, vtkIdList *stencilIds, double *weights)
virtual int	RequestUpdateExtent (vtkInformation *, vtkInformationVector **, vtkInformationVector *)

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Member Typedef Documentation

typedef vtkApproximatingSubdivisionFilter vtkLoopSubdivisionFilter::Superclass

Reimplemented from vtkApproximatingSubdivisionFilter. Definition at line 64 of file vtkLoopSubdivisionFilter.h.

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Constructor & Destructor Documentation

vtkLoopSubdivisionFilter::vtkLoopSubdivisionFilter (   )  [inline, protected]

Definition at line 68 of file vtkLoopSubdivisionFilter.h.

vtkLoopSubdivisionFilter::~vtkLoopSubdivisionFilter (   )  [inline, protected]

Definition at line 69 of file vtkLoopSubdivisionFilter.h.

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Member Function Documentation

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

Construct object with NumberOfSubdivisions set to 1. Reimplemented from vtkPolyDataAlgorithm.

virtual const char* vtkLoopSubdivisionFilter::GetClassName (   )  [virtual]

Reimplemented from vtkApproximatingSubdivisionFilter.

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

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h. Reimplemented from vtkApproximatingSubdivisionFilter.

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

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h. Reimplemented from vtkApproximatingSubdivisionFilter.

static vtkLoopSubdivisionFilter* vtkLoopSubdivisionFilter::SafeDownCast (  vtkObject *  o  )  [static]

Reimplemented from vtkApproximatingSubdivisionFilter.

virtual int vtkLoopSubdivisionFilter::RequestData (  vtkInformation *  , vtkInformationVector **  , vtkInformationVector *  )  [protected, virtual]

This is called by the superclass. This is the method you should override. Reimplemented from vtkApproximatingSubdivisionFilter.

void vtkLoopSubdivisionFilter::GenerateSubdivisionPoints (  vtkPolyData *  inputDS, vtkIntArray *  edgeData, vtkPoints *  outputPts, vtkPointData *  outputPD )  [protected, virtual]

Implements vtkApproximatingSubdivisionFilter.

void vtkLoopSubdivisionFilter::GenerateEvenStencil (  vtkIdType  p1, vtkPolyData *  polys, vtkIdList *  stencilIds, double *  weights )  [protected]

void vtkLoopSubdivisionFilter::GenerateOddStencil (  vtkIdType  p1, vtkIdType  p2, vtkPolyData *  polys, vtkIdList *  stencilIds, double *  weights )  [protected]

virtual int vtkLoopSubdivisionFilter::RequestUpdateExtent (  vtkInformation *  , vtkInformationVector **  , vtkInformationVector *  )  [protected, virtual]

This is called by the superclass. This is the method you should override. Reimplemented from vtkPolyDataAlgorithm.

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

• dox/Graphics/vtkLoopSubdivisionFilter.h

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