vtkLoopSubdivisionFilter Class Reference

generate a subdivision surface using the Loop Scheme More...

#include <vtkLoopSubdivisionFilter.h>

Inheritance diagram for vtkLoopSubdivisionFilter:

Collaboration diagram for vtkLoopSubdivisionFilter:

List of all members.

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 *)
typedef vtkApproximatingSubdivisionFilter	Superclass
static vtkLoopSubdivisionFilter *	New ()
static int	IsTypeOf (const char *type)
static vtkLoopSubdivisionFilter *	SafeDownCast (vtkObjectBase *o)
virtual int	IsA (const char *type)
vtkLoopSubdivisionFilter *	NewInstance () const
virtual vtkObjectBase *	NewInstanceInternal () const

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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 59 of file vtkLoopSubdivisionFilter.h.

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Member Typedef Documentation

typedef vtkApproximatingSubdivisionFilter vtkLoopSubdivisionFilter::Superclass

Construct object with NumberOfSubdivisions set to 1.

Reimplemented from vtkApproximatingSubdivisionFilter.

Definition at line 65 of file vtkLoopSubdivisionFilter.h.

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Constructor & Destructor Documentation

vtkLoopSubdivisionFilter::vtkLoopSubdivisionFilter

(

)

[inline, protected]

Definition at line 69 of file vtkLoopSubdivisionFilter.h.

vtkLoopSubdivisionFilter::~vtkLoopSubdivisionFilter

(

)

[inline, protected]

Definition at line 70 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.

static int vtkLoopSubdivisionFilter::IsTypeOf

(

const char *

type

)

[static]

Construct object with NumberOfSubdivisions set to 1.

Reimplemented from vtkApproximatingSubdivisionFilter.

virtual int vtkLoopSubdivisionFilter::IsA

(

const char *

type

)

[virtual]

Construct object with NumberOfSubdivisions set to 1.

Reimplemented from vtkApproximatingSubdivisionFilter.

static vtkLoopSubdivisionFilter* vtkLoopSubdivisionFilter::SafeDownCast

(

vtkObjectBase *

o

)

[static]

Construct object with NumberOfSubdivisions set to 1.

Reimplemented from vtkApproximatingSubdivisionFilter.

virtual vtkObjectBase* vtkLoopSubdivisionFilter::NewInstanceInternal

(

)

const [protected, virtual]

Construct object with NumberOfSubdivisions set to 1.

Reimplemented from vtkApproximatingSubdivisionFilter.

vtkLoopSubdivisionFilter* vtkLoopSubdivisionFilter::NewInstance

(

)

const

Construct object with NumberOfSubdivisions set to 1.

Reimplemented from vtkApproximatingSubdivisionFilter.

virtual int vtkLoopSubdivisionFilter::RequestData	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector
	)		[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/Filters/Modeling/vtkLoopSubdivisionFilter.h