vtkLoopSubdivisionFilter Class Reference

#include <vtkLoopSubdivisionFilter.h>

Inheritance diagram for vtkLoopSubdivisionFilter:

[legend]Collaboration diagram for vtkLoopSubdivisionFilter:

[legend]List of all members.

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

Created by:

Lorensen, Bill

CVS contributions (if > 5%):

Lorensen, Bill (68%)
Henderson, Amy (13%)
Cedilnik, Andy (6%)

CVS logs (CVSweb):

.cxx (/Graphics/vtkLoopSubdivisionFilter.cxx)
.h (/Graphics/vtkLoopSubdivisionFilter.h)

Tests:: vtkLoopSubdivisionFilter (Tests)

Definition at line 70 of file vtkLoopSubdivisionFilter.h.

[NOHEADER]

typedef vtkApproximatingSubdivisionFilter Superclass

virtual const char * GetClassName ()

virtual int IsA (const char *type)

vtkLoopSubdivisionFilter * New ()

int IsTypeOf (const char *type)

vtkLoopSubdivisionFilter * SafeDownCast (vtkObject *o)

Protected Member Functions

vtkLoopSubdivisionFilter ()

~vtkLoopSubdivisionFilter ()

virtual void Execute ()

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)

void ComputeInputUpdateExtents (vtkDataObject *output)

Member Typedef Documentation

typedef vtkApproximatingSubdivisionFilter vtkLoopSubdivisionFilter::Superclass

Reimplemented from vtkApproximatingSubdivisionFilter.
Definition at line 76 of file vtkLoopSubdivisionFilter.h.

Constructor & Destructor Documentation

vtkLoopSubdivisionFilter::vtkLoopSubdivisionFilter ( ) [inline, protected]

Definition at line 80 of file vtkLoopSubdivisionFilter.h.

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

Definition at line 81 of file vtkLoopSubdivisionFilter.h.

Member Function Documentation

vtkLoopSubdivisionFilter* vtkLoopSubdivisionFilter::New ( ) [static]

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

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

Reimplemented from vtkApproximatingSubdivisionFilter.

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.

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

Reimplemented from vtkApproximatingSubdivisionFilter.

virtual void vtkLoopSubdivisionFilter::Execute ( ) [protected, virtual]

This method is the old style execute method
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]

void vtkLoopSubdivisionFilter::ComputeInputUpdateExtents ( vtkDataObject * output ) [protected, virtual]

What is the input update extent that is required to produce the desired output? By default, the whole input is always required but this is overridden in many subclasses.
Reimplemented from vtkPolyDataSource.

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

dox/Graphics/vtkLoopSubdivisionFilter.h


[NOHEADER]
typedef vtkApproximatingSubdivisionFilter	Superclass
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
vtkLoopSubdivisionFilter *	New ()
int	IsTypeOf (const char *type)
vtkLoopSubdivisionFilter *	SafeDownCast (vtkObject *o)
Protected Member Functions
	vtkLoopSubdivisionFilter ()
	~vtkLoopSubdivisionFilter ()
virtual void	Execute ()
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)
void	ComputeInputUpdateExtents (vtkDataObject *output)